34results about How to "Avoid measurement bias" patented technology

The invention relates to a steel bar reverse bending test device, and belongs to the field of steel bar detection devices. The device comprises a rack and a workbench rotationally arranged on the rack. A supporting shaft is arranged on the rack; the supporting shaft penetrates through the workbench upwards and is coaxial with the workbench. A plurality of mounting holes are formed in the workbench; a bending block is inserted into any mounting hole; a working plate is arranged on the rack in the vertical direction in a sliding mode. A sliding rail is arranged on the working plate; scale marks are arranged in the length direction of the sliding rail. A first supporting piece is slidably arranged on the sliding rail. A first through hole is formed in the first supporting piece; a second supporting piece is arranged on the working plate; a second through hole is formed in the second supporting piece; the steel bars sequentially penetrate through the first through holes and the second through holes. A first image sensor is arranged on the rack; the method has the technical effects of avoiding manual calculation of the steel bar bending angle and improving the steel bar detection precision.

The application discloses a kind of no sampling resistance square wave control overcurrent protection method, method includes: real-time acquisition digital sampling sequence of direct current bus voltage, synchronous analysis logic state combination of three-phase PWM driving signal;According to the mapping table of pre-stored commutation state machine, the logic state combination is converted into current effective conduction phase identification, and the signal of corresponding current detection enable window is generated, and enable window is limited to the interval of voltage oscillation attenuation completion after PWM opening to before off before freewheeling protection;During the effective period of enable window, the digital band-pass filtering is carried out to bus voltage digital sampling sequence, the voltage drop component of characteristic frequency band is extracted, and the time-domain integral value and the rate differential value of voltage drop component are calculated.The application is reconstructed by the current of no sampling resistance technology and dynamic protection strategy, while reducing hardware cost, significantly improve system reliability, effectively solve the protection failure problem of traditional scheme under commutation interference, high-speed working condition and transient impact.

This application discloses a tool setting method and tool setting fixture for a vertical slotting machine, belonging to the technical field of tool setting devices. To address the problems of low tool setting efficiency and poor accuracy in existing vertical slotting machines, the tool setting fixture includes a central support plate. A triangular jaw is installed at the bottom of the central support plate. The tool setting fixture is installed at the inner hole of the workpiece to be processed via the triangular jaw. A support base for fixing a measuring device is installed on the front side of the central support plate. A tool setting sample block is detachably connected to the support base. The operator determines the tool setting position by cooperating with the measuring device and the tool setting sample block. This application is mainly used as a tool setting device for CNC vertical slotting machines.

This application discloses a method for inverting insect wingbeat frequency based on initial phase calculation, relating to the field of radar measurement technology. The method includes: establishing a radar echo model of insect wingbeat motion containing amplitude and phase initial phases; acquiring micro-motion signals from the collected insect echoes based on the model to generate a micro-Doppler spectrum; calculating the phase initial phase value of the insect wingbeat based on the micro-Doppler spectrum; constructing a phase compensation factor based on the phase initial phase value to obtain a wingbeat parameter plane; detecting energy peaks in the wingbeat parameter plane based on the phase compensation factor; and determining the insect's wingbeat frequency based on the position of the energy peaks. This application, by introducing phase and amplitude initial phases, recreates the dual physical processes of wing movement and body micro-motion during insect wingbeat, making the radar echo model highly consistent with the actual signal generation mechanism, reducing errors, and improving anti-interference capabilities.

The application provides a method for detecting biochemical oxygen demand in sewage, and belongs to the field of oxygen demand detection. The method comprises the following steps: forming a fluorine-containing organosilicon nano coating on the electrode surface of a dissolved oxygen sensor of a full-automatic BOD5 analyzer to obtain a fluorine-silicon modified dissolved oxygen sensor; pretreating the sewage to be detected in an adsorption column composed of modified activated carbon and porous silica gel to obtain a pretreated water sample; fixing bacillus subtilis on a porous carrier and then putting the carrier into the pretreated water sample to obtain an inoculated water sample; measuring the initial dissolved oxygen of the inoculated water sample and the end-point dissolved oxygen after 5-day culture; and obtaining the five-day biochemical oxygen demand in the sewage according to the initial dissolved oxygen and the end-point dissolved oxygen. Through the four-level collaborative system of "sensor anti-interference optimization, sample purification and enrichment, microbial reaction standardization and accurate signal acquisition", the application systematically eliminates the error sources in the traditional BOD5 detection, and realizes the accurate measurement of the organic matter pollution level in complex sewage.

This invention discloses a method for online sodium ion monitoring in steam and water supervision, belonging to the technical field of steam and water quality monitoring in thermal power plants and large industrial boilers. This method is a graded monitoring approach for online sodium ion monitoring in steam and water systems. By setting differentiated monitoring strategies at key nodes and combining intelligent diagnostic algorithms with optimized operation and management measures, it achieves a shift from "post-event detection" to "pre-event early warning," improving the timeliness, accuracy, and reliability of steam and water quality supervision.

The utility model provides a scraper fineness meter calibrating device which comprises a calibrating workbench, a calibrating jig, a scraper fineness meter, a driving case, a calibrating screw rod, a driving motor and an identifying structure, the calibrating jig is installed at the front end of the surface of the calibrating workbench, the scraper fineness meter is placed on the calibrating jig, and the driving case is installed on the calibrating screw rod. The driving case is mounted at the rear end of the surface of the verification workbench; the verification screw rod is mounted in front of the driving case, the driving motor is fixedly mounted at the top of the driving case, and an output shaft of the driving motor is connected with the verification screw rod; the identification structure is slidably mounted in front of the driving case and is engaged with the verification screw rod; according to the utility model, with the arrangement of the verification tool and the identification structure, a large amount of workers are not required to participate in verification, the accuracy of obtained information is high, and the verification process is simple.

The invention relates to the technical field of data processing of multi-source data fusion, and discloses an investigation data integration analysis method and system based on multi-source data fusion. According to the scheme, a multi-source sensor is deployed, original voltage is collected, and standardization is carried out in each physical quantity range; constructing temperature, pressure and vibration three-dimensional observation and states based on a unified time index, and setting initial values; recursive prediction is carried out by using a constant preserving model; counting a multi-measuring-point variance in a static window, determining observation noise in combination with the minimum quantization step size, and calculating fusion gain; linearly updating and correcting covariance, and then carrying out dimension-by-dimension amplitude limiting according to an abnormal upper limit; carrying out space averaging on the three-dimensional results of the multiple measuring points at each sampling moment, and carrying out rollback if necessary; and a fusion sequence and a statistical report are formed in the whole cycle. According to the method, the data scale is unified, subjective parameters and computing power burden are reduced, adaptive noise modeling along with the environment is achieved, stable noise suppression and fault resistance are achieved, and continuous output and comparable analysis are guaranteed.

The utility model discloses a kind of for inspecting the length of annular class sealing strip, and the utility model discloses a kind of inspection tool, including movable assembly, fixed assembly, supporting assembly, sliding assembly, rocker assembly, gravity component;Fixed assembly is fixedly arranged on supporting assembly, and several sliding assemblies are arranged on supporting assembly;Movable assembly is installed on supporting assembly by sliding assembly;Rocker assembly connects fixed assembly with movable assembly;Gravity component connects movable assembly with supporting assembly, sealing strip is installed on fixed assembly, after releasing rocker, gravity component drives movable assembly to move along sliding assembly.This application successfully combines three high efficiencies of easy operation, space economy and result accuracy, becomes a kind of modern online detection solution that is integrated with low cost, high efficiency, high reliability.

This invention discloses a pressure gauge testing device, relating to the field of pressure gauge testing technology. The device includes a first housing, with vertical plates fixed to both sides of the first housing. A top plate is horizontally fixed to the upper end of the vertical plates, and several electric telescopic rods are vertically fixed to the lower end of the top plate. A second housing is horizontally fixed to the output end of the electric telescopic rods. The second housing is equipped with a clamping and fixing mechanism. Testing mechanisms are provided on the first housing, the top plate, and the second housing. A conical block is fixed to the upper end of the first housing below the second housing. A sealing gasket is fixed to the side wall of the conical block, and a limit tube is vertically fixed to the upper end of the conical block. A gas supply mechanism is provided inside the first housing. This invention uses the clamping and fixing mechanism to center and clamp the pressure gauge under test, uses the electric telescopic rods to press the connection end of the pressure gauge under test to the sealing gasket to form a sealed connection, and introduces gas through the gas supply mechanism and uses the testing mechanism to automatically complete the dual testing of accuracy and sealing performance.

This invention discloses a radiation dose measurement method and system based on dual-decision level and vertical fusion, solving the technical problem that existing radiation dose measurement methods ultimately lead to poor accuracy of radiation dose measurement results. The method includes configuring a dedicated monitoring area in a 3D NAND flash memory chip, integrating idle physical blocks within it to obtain an independent monitoring area; performing programming writing and multi-reference voltage scanning on the main monitoring block within the area, outputting dual-decision levels; based on the physical page mapping relationship of the main monitoring block, forming monitoring sampling groups according to vertical positions and counting the total number of bits in each sampling group; performing dual-reference voltage reading based on the dual-decision levels and the total number of bits, outputting the truncated cumulative probability; screening valid monitoring sampling groups and extracting their threshold distribution mean, performing baseline alignment and dose inversion, and finally outputting the radiation dose estimate.

This invention provides a power device temperature rise detection apparatus and method, relating to the field of power device temperature rise detection. The detection apparatus includes an optical path system and a signal processing system. The optical path system includes a light source, a beam splitter group, a measuring mirror, and a reference mirror. The measuring mirror can be fixed to the power device under test. The light provided by the light source is split into two beams by the beam splitter group. The two beams are reflected back to the beam splitter group by the measuring mirror and the reference mirror, respectively, producing a Michelson interference phenomenon. The signal processing system is used to acquire and process the interference fringe signal, and the calculation software obtains the displacement of the measuring mirror caused by the temperature rise of the power device, thereby deducing the temperature rise of the power device under test. Using this detection apparatus for temperature rise measurement is a non-contact measurement, effectively avoiding measurement deviations in traditional thermocouple measurements. Furthermore, by utilizing the principle of light interference for displacement measurement and then deducing the temperature rise, it offers high sensitivity and accuracy, ensuring the reliability of power device temperature rise detection.

The utility model relates to a multiband temperature measuring device for tin metallurgy. The multiband temperature measuring device for tin metallurgy comprises a box body, the mounting groove is formed in the rear end in the box body and is used for mounting the spectrum analyzer and the laser generator; the mounting hole group is formed in the front wall of the box body and is used for allowing the front ends of the infrared camera, the laser device, the visible light device and the optical fiber component to pass through and be positioned; and the adjustable supporting assembly is arranged at the front end in the box body and is used for allowing the middle rear parts of the infrared camera, the laser device, the visible light device and the optical fiber assembly to penetrate through. According to the application, the infrared camera, the laser, the visible light device and the optical fiber assembly are integrated in the box body for cooperative work, spectral information is collected in multiple bands and fused and analyzed, and infrared temperature measurement influenced by metal surface radiation characteristics is not simply depended any more, so that temperature information is accurately obtained; measurement deviation caused by radiation characteristics of the metal surface is effectively avoided, and the measurement precision is improved.

The utility model discloses a new energy controller motor temperature sampling circuit, which is characterized by comprising a power supply filter circuit, a temperature signal sampling circuit, a drive control module and a signal conditioning and amplifying module, the power supply filter circuit is connected with the driving control module, the temperature sampling circuit is connected with the driving control module, and the driving control module is connected with the signal conditioning and amplifying module. The motor temperature sampling accuracy is improved, the motor temperature sampling is not easily influenced by the temperature, the motor temperature sampling reliability is effectively improved, and the motor is protected more timely.

The invention belongs to the technical field of power electronics, and discloses an on-line monitoring method and system for the on-resistance of a GaN power device, and the method comprises the following steps: in a testing process, firstly, measuring the junction temperature of the GaN device in real time through thermo-sensitive electric parameters; then, the working environment where the GaN device is located is adjusted through an environment control module, and it is ensured that the junction temperature is stabilized at the preset fixed temperature; after the junction temperature is stable, acquiring data of the GaN device in a conduction state by synchronously sampling conduction voltage and current; and finally, calculating the conduction resistance value of the GaN device based on the collected conduction voltage and current data. The system comprises a junction temperature measuring module, an environment control module, a sampling module and a microcontroller. According to the method, the junction temperature of the GaN power device is stably controlled under a fixed condition in the online measurement process, and then conduction voltage and current sampling is carried out, so that the influence of temperature fluctuation on a conduction resistance measurement result is effectively eliminated, and the measurement data has higher accuracy and comparability.

The invention provides equipment and a method for measuring lodging resistance of rice, and relates to the technical field of agricultural machinery. The equipment comprises a vertical supporting rod and an overturning supporting rod hinged to the lower end of the vertical supporting rod, a thrust measuring part is installed at the hinged position, a straw holding assembly and a lower straw shearing assembly are integrated on the thrust measuring part, and a mass measuring part and a power supply battery are arranged on the vertical supporting rod. The method comprises the following steps: measuring internode breaking strength; selecting rice plants and measuring the height; bundling at a position 20cm away from the ground surface; applying a thrust to incline for 45 degrees, and measuring the thrust; after shearing, weighing the weight of the upper part; and calculating a bending moment and a lodging index. According to the scheme, thrust, weight and shearing parameters are synchronously obtained through an integrated structure, the field test efficiency and data accuracy are improved, manual operation errors are reduced, and the method can be used for evaluating the lodging resistance of rice.

The invention provides a precision cooperative measurement and control method under wind tunnel multi-system cross operation, and belongs to the technical field of wind tunnels. A distributed pressure sensor array and a flow field monitoring network are established, and a flow field cooperative compensation optimization model is utilized to output real-time correction parameters for spatial position correction; temperature drift model compensation and optical pose closed-loop control are adopted to eliminate temperature and load influences, a test process is optimized through a multi-stage decision model, a state observer is used for soft measurement of a flow field state, and multi-source data are integrated to trigger adaptive sampling and online calibration. The technical problem that it is difficult for a multi-measurement system to achieve cooperative and consistent precision in spatial distribution and time sequence is solved.

The application discloses a kind of metrology machine, belong to integrated circuit technical field, the metrology machine includes: metrology optical system, magnetic levitation wafer workstation and at least three gratings;Metrology optical system and grating are located in the upper of magnetic levitation wafer workstation;The position of metrology optical system is fixed;Grating is arranged along the circumferential direction of metrology optical system;Magnetic levitation wafer workstation includes magnetic levitation workstation, wafer chuck and at least three position sensor readheads;Wafer chuck and position sensor readhead are arranged on the surface of magnetic levitation workstation close to metrology optical system;Position sensor readhead is arranged along the circumferential direction of wafer chuck;When measuring wafer, each grating and the light signal interaction of corresponding one position sensor readhead with grating is carried out to measure the position information of magnetic levitation wafer workstation.The application can accurately control magnetic levitation wafer workstation to realize 6 degrees of freedom motion, to reduce transmission error, improve motion accuracy.

The application relates to a synchronous transmission mechanism and a fixed bridge type image measuring instrument, which comprises a first transmission belt, a second transmission belt, a transmission shaft and a pre-tightening device; the transmission shaft is provided with sixth rotating wheels and seventh rotating wheels with equal diameters at two ends; the first transmission belt is in mesh transmission with the sixth rotating wheels; the second transmission belt is in mesh transmission with the seventh rotating wheels; the first transmission belt comprises a first part and a second part, and the second transmission belt comprises a third part and a fourth part; the first part of the first transmission belt is in transmission connection with a measuring head, and the third part of the second transmission belt is in transmission connection with a bottom light device; or the second part of the first transmission belt is in transmission connection with the measuring head, and the fourth part of the second transmission belt is in transmission connection with the bottom light device; the pre-tightening device is used for tensioning at least one of the first transmission belt and the second transmission belt. The synchronous transmission mechanism and the fixed bridge type image measuring instrument have the advantages of high measuring precision.

The invention relates to an antenna switch testing method and device, electronic equipment and a storage medium, and the method comprises the steps: enabling a power measurement unit to be connected to a pin of an antenna switch under the condition that the antenna switch in network access equipment is determined to enter a static working mode, the static working mode is used for providing a non-interference test environment for measuring the static power supply current of the antenna switch; continuously sampling the pin current of the antenna switch under the fixed voltage through the power measurement unit, and determining a current average value; and if the current average value exceeds a set current range, determining that the antenna switch is unqualified. According to the invention, the reject ratio of production calibration of the network access equipment is reduced.

The application provides a kind of kitchen waste hanging barrel mechanism weighing method, device and equipment, it is related to new energy special automobile technical field.The method comprises: in the working process of kitchen waste hanging barrel mechanism, with preset sampling interval, the weight value is collected by weighing sensor.According to the weight value and the preset stable detection condition, the first weight value corresponding to the rising state and the second weight value corresponding to the falling state of the garbage can are determined.The difference between the first weight value and the second weight value is determined, and the difference is used as the net weight of kitchen waste.The method is used to improve the accuracy, reliability and stability of kitchen waste weighing system.

The utility model relates to a connector aperture rapid detection tool in the technical field of connector aperture measurement tools, which comprises a straight handle, one end of the straight handle is coaxially provided with a large-aperture conical column ruler, and the other end of the straight handle is coaxially provided with a small-aperture conical column ruler; each of the large-aperture cone-column ruler and the small-aperture cone-column ruler comprises a cone-frustum main ruler, wherein the large-diameter end of the cone-frustum main ruler is connected with a straight handle; the vernier scale comprises a positioning part axially connected with the main scale in a sliding manner, a vernier part which slides along the generatrix direction of the main scale and is radially connected with the positioning part in a sliding manner, and a locking piece for locking the position of the vernier part; according to the utility model, two ends of the straight handle are respectively provided with the large-aperture conical column ruler and the small-aperture conical column ruler, so that the detection requirements of different-size apertures of the connector can be met. Compared with a traditional go / no-go gauge which needs to replace tools frequently, the tool can complete measurement of various apertures through single equipment, the tool switching time is remarkably shortened, and the detection efficiency is improved.

This application provides a network performance testing method and apparatus, which can improve the accuracy of network performance testing for service flows. The method includes: responding to a user's global configuration operation for each network device and obtaining global configuration information for each network device; sending an enable command to the corresponding network device based on the global configuration information, the enable command being used to activate the network device's flow-following detection function based on the global configuration information; after the flow-following detection function of each network device is successfully activated, responding to a user's detection instance creation operation and instance configuration operation for the target service and obtaining service flow characteristic information and detection task information for the target service; determining a detection instance configuration command based on the service flow characteristic information, the service flow's binding interface, and measurement parameters, and sending the detection instance configuration command to the source device based on the source device's identifier; and obtaining network performance measurement data reported by each network device corresponding to the service flow according to the detection instance configuration command.

The utility model discloses electronic tension equipment for a full-screen cloth screen printing plate. The electronic tension equipment comprises an outer shell, a planar pressure sensor, a counterweight device, a contact point assembly, a mechanical transmission device, a data acquisition module and a data analysis module, the contact point assembly is located at the bottom of the outer shell and fixedly connected with the mechanical transmission device located in the middle of the outer shell, and the mechanical transmission device is fixedly connected with the planar pressure sensor located in the middle of the outer shell. The planar pressure sensor is electrically connected with the data acquisition module through a data transmission line, and the planar pressure sensor is made of a flexible material; through the planar pressure sensor and the high-precision non-lagging mechanical transmission device, high-precision measurement of the tension of the screen cloth can be realized. The planar pressure sensor is made of a flexible material and can acquire screen cloth tension data in a large area, the mechanical transmission device can accurately transmit screen cloth tension transmitted by the contact point assembly to the planar pressure sensor, and measurement deviation caused by transmission errors is avoided.

The invention discloses an oil volume measuring method and system for a multi-oil-tank aircraft. The method comprises the following steps: based on a geometric model of each fuel tank of the same aircraft, pre-generating a query database associated with the oil level height, the oil level pitch angle, the oil level roll angle and the oil volume of each fuel tank; measuring and calculating a real-time oil surface pitch angle and an oil surface roll angle shared by each oil tank through a plurality of pose sensors arranged on one oil tank; the real-time liquid level height of each oil tank is obtained through the respective liquid level sensor of each oil tank; for each oil tank, the real-time oil surface pitch angle, the oil surface roll angle and the real-time liquid level height of the oil tank form query parameters, matching query or interpolation calculation is carried out in a query database corresponding to the oil tank, and the real-time oil volume of the oil tank is obtained; and performing time sequence filtering processing on each calculated real-time oil volume to obtain a final oil volume of each oil tank. According to the invention, high-precision and high-stability measurement of the oil volume can be realized.

The invention discloses a silicon capacitor product full-automatic detection line which comprises a supporting table, a feeding mechanical arm and a discharging mechanical arm are installed on the top of the supporting table, and a detection table is rotationally connected to the top end of the supporting table. The invention relates to the technical field of silicon capacitor product detection, and discloses a full-automatic detection line for silicon capacitor products, and the full-automatic detection line achieves the function of automatically detecting the silicon capacitor products through the arrangement of a feeding manipulator, a discharging manipulator, a connecting seat, a detection table, a placement table, an adjusting mechanism, a sliding frame, a clamping block and a visual detection camera. The silicon capacitor products can be clamped and positioned during feeding, so that each silicon capacitor product can be positioned at a unified preset position, and a visual detection camera is always aligned with a target detection area; by arranging the fixed table, the protective frame, the dust hood, the connecting shaft, the cleaning roller, the mounting plate and the locking mechanism, the function of shielding and protecting the visual inspection camera after the silicon capacitor product inspection work is completed is achieved, and the visual inspection camera is prevented from being collided.

A medical device inspection and packaging workbench belongs to the field of sterilization packaging technology. It includes a working surface (2), a weighing mechanism is provided on one side of the lower part of the working surface (2), and an opening corresponding to the weighing surface of the weighing mechanism is also provided on the surface of the working surface (2). The workbench is characterized by: a weighing box (3) being provided on the lower surface of the working surface (2), the weighing mechanism being disposed inside the weighing box (3), and a leveling mechanism for adjusting the tilt angle of the weighing mechanism being provided on the bottom surface of the weighing box (3), with the weighing mechanism mounted on top of the leveling mechanism. In the medical device inspection and packaging workbench of this application, by providing a leveling mechanism, the weighing surface of the weighing mechanism is made parallel to the working surface, avoiding measurement deviations caused by uneven load distribution. By providing a guide component on the surface of the weighing base plate, the stability of the weighing mechanism during lifting and lowering is improved.

The application discloses a bevel gear bevel angle measuring device and method, and relates to the technical field of gear measurement. The device comprises the following steps: obtaining displacement parameters and mechanical parameters of a target bevel gear under different inclination conditions, establishing a mapping relationship between the displacement parameters, the mechanical parameters and the bevel angle; establishing a coordinate system based on the installation position of the target bevel gear, and uniformly mapping the displacement and the mechanical parameters collected in the measuring process into the coordinate system; and setting a tactile probe in contact with the tooth surface under a preset load condition. The application establishes a coordinate system consistent with the gear installation reference, uniformly maps the displacement and the mechanical parameters to a standard reference frame, and expands the three-dimensional coordinates in combination with the gear rotation angle, so that complete description of the spatial position of the tooth surface is realized, and the distribution characteristics of the bevel angle in the tooth height direction and the circumferential direction can be intuitively presented, thereby providing visual judgment basis for the uniformity of the tooth surface angle and the design compliance.

The invention relates to a radar flow measurement method based on video assistance. The method comprises the following steps: S1) measuring the vertical distance between the water level radar device and the liquid level by using the water level radar device, and sending the vertical distance value to a visual system with a video acquisition device; s2) acquiring a first water surface flow velocity by using a visual system, and transmitting the first water surface flow velocity to a flow velocity radar device; and S3) a speed measurement interval is set based on the first water surface flow velocity, the flow velocity radar device calculates a Doppler frequency shift interval corresponding to the speed measurement interval, a frequency reflecting the water flow velocity is found in the Doppler frequency shift interval, and the final water surface flow velocity is calculated according to the frequency.

The invention provides a water quality sampler for environmental monitoring, and relates to the technical field of water quality sampling, the water quality sampler comprises a servo motor, the lower end surface of the servo motor is detachably connected with a connecting cylinder; three groups of pressure control water inlet mechanisms are arranged up and down at equal intervals, each pressure control water inlet mechanism comprises a mounting frame, four groups of water storage boxes up and down are arranged in the mounting frame, multiple groups of extrusion strips are arranged in the water storage boxes, two groups of fixing rings are coaxially arranged on the mounting frame, and the side walls of the fixing rings are fixedly connected with the side walls of the water storage boxes; the uppermost fixing ring is fixedly connected with the inner side wall of the connecting cylinder; three sampling mechanisms are further included, the three sampling mechanisms correspond to the pressure control water inlet mechanisms and comprise sampling discs, the sampling discs are rotationally connected into the mounting frame, and the outer surfaces of the sampling discs abut against the water storage box and the lower end face of the extrusion strip. The water quality sampler for environmental monitoring realizes unified collection of water samples at different depths in the same time period and water samples at the same depth and in different time periods.