339results about How to "Undisturbed" patented technology

The invention discloses an electrochemical luminescence immunosensor with low trigger potential and a construction method and application thereof, the immunosensor comprises a working electrode, a reference electrode and a counter electrode, and a liquid to be detected contains luminol and hydrogen peroxide; the working electrode is a VMSF modified electrode of confined gold-palladium nanoparticles, and is obtained by covalently immobilizing an antibody and closing non-specific active sites. Luminol and an antibody are respectively used as an electrochemical luminescence signal molecule and a specific recognition element; in combination with the anti-pollution effect of the VMSF and the efficient catalytic effect of the gold-palladium nanoparticles on a low-trigger-potential electrochemical luminescence system, the sensor has the characteristics of high sensitivity, wide detection linear range and low detection limit, and can be applied to detection of the content of tumor markers, cell surface factors and bacterial or virus surface factors in biological samples. The method has great application potential in the fields of clinical diagnosis and monitoring and basic medical research.

The invention discloses a helicopter gear sleeve part assembly pose adjusting method based on eddy current distance measurement. The method comprises the steps of firstly building a gear sleeve part pose measurement system and establishing a measurement coordinate system, then correcting measurement errors of inner arc surface features measured by an eddy current displacement sensor, performing rotary scanning measurement by using the sensor to extract the surface profile of the part, calculating axis inclination angle information of the gear sleeve part in a rough measurement stage, and calculating the axis inclination angle information of the gear sleeve part. Then the relative pose of the sensor and the detected gear sleeve part is adjusted; and in the accurate measurement stage, coordinates of the section contour circle centers of the upper and lower inner arc surfaces are obtained, axis pose parameters of the gear sleeve part are obtained through calculation, and finally the assembly pose is adjusted. The method aims to correct the eddy current measurement error of the inner arc surface characteristic on the premise of no target, no contact and no grease interference, improves the measurement precision and efficiency of the assembly pose of the gear sleeve part, and can be used for high-precision measurement and adjustment of the axis pose of the part in the automatic assembly process of the gear sleeve part.

The present invention discloses a waste gas pretreatment separation device for RTO equipment, which specifically relates to the technical field of industrial waste gas treatment, including two separation chambers distributed in parallel and spaced apart, top covers can be detachably installed on the tops of the two separation chambers, one side of the two separation chambers is connected to an air inlet pipe, and the other side of the two separation chambers is connected to an air outlet pipe. The waste gas separation device of the present invention adopts a two-separation chamber design, and the active cut-off mechanism can move in the two separation chambers to complete targeted active cut-off. At the same time, the synchronous linkage switching unit is actuated, so that the separation chamber actively cut off by the cut-off plate completes the active filter cloth switching, without manual maintenance and replacement, saving time and labor, and reducing maintenance costs, and with the assistance of the limiting mechanism, during the switching process of the active cut-off mechanism, the limiting mechanism on the side of the filter cloth that needs to be replaced is moved, so that the limiting mechanism is separated from the filter cloth, so that the switching of the filter cloth is smoother and the resistance is reduced.

The invention relates to a particle detection device and method based on a planar optical waveguide microscope, and the device comprises a light source modulator which emits a visible light laser beam and a short wave infrared laser beam and reflects a coaxial combined dual-wavelength laser beam; the planar optical waveguide objective table comprises a parabolic reflector and a planar optical waveguide sheet which are arranged on the planar optical waveguide objective table, and particle samples to be detected are dispersedly placed on the planar optical waveguide sheet; the microscope objective is used for respectively collecting dark field scattered field signals of the visible light laser beam and the short wave infrared laser beam; and the beam splitting acquisition system is used for performing acquisition imaging and statistical analysis on dark field scattered field signals. Compared with the prior art, the invention has the advantages of stable sampling test environment, single particle analysis capability, nanoscale measurement resolution and the like.

The invention discloses a near-infrared fluorescent carbon dot capable of efficiently marking sEVs and application of the near-infrared fluorescent carbon dot. Urea, citric acid and Nile blue are used as precursors, and the carbon dot is prepared through a one-step solvothermal method; then activating carboxyl on the surface of the carbon dot under the action of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride to be combined with N-hydroxysuccinimide, so as to prepare the near-infrared fluorescent carbon dot, namely CDs-NHS. The method comprises the following steps: mixing CDs-NHS with sEVs or cells containing the sEVs, and marking the sEVs; the near-infrared fluorescent carbon dots are used for marking, marking conditions are mild, operation is easy, and the near-infrared fluorescent carbon dots have good specificity, pH tolerance and low cytotoxicity and have the advantages of being excellent in light stability and the like compared with small-molecule dye.

The hydraulic cylinder with the piston rod displacement detection function comprises a cylinder barrel, a cylinder bottom, a piston rod and a piston, a non-metal plug and a displacement detection assembly are installed on the cylinder bottom, a signal transmitting and receiving unit is arranged on the displacement detection assembly, and the signal transmitting and receiving unit is externally connected with a centralized control center, a controller, a driver and an electromagnetic reversing valve; the signal transmitting and receiving unit is coaxial with the inner connecting hole, the displacement of the piston rod is obtained by calculating the interval between transmitted sound waves and returned sound waves, meanwhile, displacement data is transmitted to the controller and the centralized control center, and the controller receives a hydraulic cylinder stroke instruction sent by the centralized control center and controls the hydraulic cylinder stroke instruction to move. And then, the driver is used for controlling the opening and closing of the electromagnetic reversing valve and controlling the liquid inlet of the upper cavity or the lower cavity of the hydraulic cylinder. The hydraulic cylinder can realize non-contact real-time detection of the displacement of the piston.

The strong magnetic tool extension rod comprises an extension rod body, magnets and magnetic conduction structures, the magnets are symmetrically distributed on the side portion of the extension rod body with the axis of the extension rod body as the center, and the magnetic conduction structures are arranged on the axial side portions of the magnets. Wherein the magnetic conduction structure comprises a front magnetic conduction structure and a rear magnetic conduction structure which are arranged on the two sides of the magnet respectively, the front magnetic conduction structure is arranged at the adaptive tool head connecting end of the extension rod, and the rear magnetic conduction structure is arranged at the receiving tool driving connecting end of the extension rod. Compared with the prior art, the electric tool bit has the advantages that magnetic lines of force are guided and collected towards the bit tip through the magnetic conductive structure, the magnetic field direction is improved, the magnetism of the bit tip is higher, and the technical problem that in the prior art, an electric tool bit is poor in screw adsorption capacity is solved.

The utility model discloses a switching-in circuit compatible with multiple voltage levels, and effectively solves the problem that a protection device circuit is not suitable for different voltage levels. Comprising an input circuit which comprises an anode input port and a cathode input port; the resistance voltage division circuit comprises a positive voltage division resistor and a negative voltage division resistor; the level adjusting circuit comprises a linear voltage regulator, the linear voltage regulator comprises a voltage stabilizing input port, a voltage stabilizing output port and an adjusting port, the adjusting port is connected with a first adjusting resistor and a second adjusting resistor, one end of the first adjusting resistor is connected with the negative electrode input port, and the other end of the first adjusting resistor is connected with the negative electrode output port. One end of the second adjusting resistor is connected in parallel with the voltage stabilization output port; according to the utility model, the structure is ingenious, the use is convenient, through the arrangement of the jumper wire and the linear voltage regulator, not only can adjustment be carried out according to different voltage class inputs, the damage of high voltage to components be prevented, but also the versatility of the equipment circuit is improved.

This invention relates to a processing method for soft and tender abalone with a soft, glutinous texture, comprising the following steps: S1, pre-treating fresh abalone to obtain pre-treated abalone meat; S2, placing the pre-treated abalone meat under hot air conditions, first heating it to a first temperature and holding it at that temperature, then raising the temperature to a second temperature and holding it at that temperature, to obtain enzyme-inactivated abalone meat; the first temperature does not exceed 55°C, and the second temperature is at least 10°C higher than the first temperature; S3, enzymatically hydrolyzing the enzyme-inactivated abalone meat with a protease, and after inspection and packaging, obtaining soft and glutinous abalone with a soft, glutinous texture. This invention, through gradient temperature inactivation of enzymes and three-parameter synergistic regulation of enzymatic hydrolysis, produces soft and glutinous abalone with a sticky adductor muscle adhesiveness >25N, a soft, glutinous texture uniformity >90%, and a 100% success rate in achieving the desired soft and glutinous texture. The method of this invention is simple and can achieve large-scale and continuous production. It is suitable for the industrial processing of high-end ready-to-eat soft-boiled abalone, pre-cooked soft-boiled abalone, and other products, significantly improving the added value and market competitiveness of abalone products.

The invention discloses a pneumatic muscle driving joint force position control method and device based on fuzzy admittance and a medium. According to the method, firstly, through dynamic adjustment of the fuzzy admittance model, accurate cooperative control over the joint position and the output force is effectively achieved; secondly, the self-adaptive capacity of the system to external disturbance is enhanced by monitoring the influence of the external disturbance on the joints in real time; and the fuzzy admittance model dynamically adjusts admittance parameters according to the data, so that the control requirements of force and position are balanced, and the system can still maintain a predetermined control effect under a disturbance condition. Finally, through closed-loop feedback control, in combination with real-time monitoring data and an expected control instruction, admittance parameters are continuously adjusted, and the stability and robustness of the system in a complex dynamic environment are enhanced.

The invention relates to the field of automatic conveying, in particular to C-shaped lining conveying and detecting equipment which comprises a friction type self-adaptive rotating device, a T-shaped screening and conveying device and a first flexible internal expansion material moving mechanical arm. The friction type self-adaptive turning device drives the C-shaped bushing to rotate by utilizing friction force, and uniformly adjusts the opening direction of the C-shaped bushing to a preset angle; the first flexible internal expansion material moving manipulator is used for transferring the C-shaped bushings between the friction type self-adaptive rotating device and the T-shaped screening and conveying device and grabbing the inner walls of the C-shaped bushings in an internal expansion manner; and the T-shaped screening and conveying device is used for receiving the C-shaped bushings and removing the C-shaped bushings with incorrect opening directions by utilizing a profiling structure of the T-shaped screening and conveying device. The friction type self-adaptive turning device is used for replacing expensive machine vision equipment, the cost is low, interference of greasy dirt and light rays is avoided, and the adaptability is high; and meanwhile, by means of the physical profiling design of the T-shaped screening and conveying device, error correction and rejection of wrong opening directions are achieved, and accurate feeding is ensured.

The embedded wireless sensing test wafer is characterized in that the embedded wireless sensing test wafer comprises an upper silicon wafer, a lower silicon wafer and a circuit board, the upper silicon wafer and the lower silicon wafer are clamped on the two sides of the circuit board, the surfaces, facing the circuit board, of the upper silicon wafer and the lower silicon wafer are subjected to laser engraving or mechanical fine carving to form containing grooves, and the circuit board is embedded in the containing grooves; the thickness of the upper silicon wafer is 0.7-0.9 mm, the thickness of the lower silicon wafer is 0.3-0.4 mm, and the overall total thickness of the upper silicon wafer and the lower silicon wafer clamping the circuit board is smaller than or equal to 1.2 mm. The thickness similar to that of an actually produced wafer is realized, the authenticity of measurement is improved, the internal stress of the wafer is effectively eliminated by the heat treatment process, the reliability of a product is improved, the service life of the product is prolonged, the risk of processing fragments is reduced by the overall processing process, and the production cost is reduced.

The invention relates to the field of pipe body valve core sealing performance detection, and provides a pipe body interface positive pressure sealing performance detection device comprising an air inlet joint which is in butt joint with a pipe body joint, is provided with an air inlet, and is internally provided with a first flow channel and a second flow channel which are respectively communicated with a first flow channel hole and a second flow channel hole; a flow separation valve element is movably arranged in the air inlet connector, and in the air inlet process, along with the increase of the air pressure in the air inlet connector, after the first valve element is opened and before the second valve element is opened, the flow separation valve element can move to cut off the first flow channel so as to cut off the flow channel between the air inlet and the first flow channel hole; the air pressure detection module is connected with the air inlet connector and used for detecting the air pressure between the air inlet connector and the pipe body connector. The working efficiency of detecting the sealing performance of the secondary sealing valve element can be improved.

The present invention discloses a flexible folding display module support structure, wherein a deformable member is mechanically linked to a folding mechanism through a control member: when the folding mechanism is flattened, the deformable member is first deformed through the control member so that the support plate supports the back side of the bending zone, thereby improving the flatness of the bending zone; when the folding mechanism is bent, the deformable member is second deformed through the control member so that the support plate avoids the back side of the bending zone to avoid interference with the screen body; this solution improves the bending resistance and impact resistance, ensures the flatness and display effect of the flexible folding screen, and improves the crease problem in the bending zone; at the same time, the deformable member is used in a mechanical matching structure linked to the folding mechanism, which has timely response, high reliability, and is not affected by factors such as electromagnetic signals. The present invention also discloses a flexible folding display module using the above-mentioned support structure.

The invention discloses a chip continuous extraction device for a dry etching machine, and belongs to the technical field of semiconductor manufacturing equipment. Comprising a magnetic levitation conveying mechanism and a cleaning module, the magnetic levitation conveying mechanism comprises a track base plate, a motor stator module and a magnetic levitation and air floatation supporting plate, the motor stator module is arranged in the track base plate, the magnetic levitation and air floatation supporting plate is located above the motor stator module, and a limiting ring is arranged on the edge of the magnetic levitation and air floatation supporting plate; a multi-cavity air path structure is arranged in the magnetic suspension air floatation supporting plate, a permanent magnet array is arranged at the bottom of the magnetic suspension air floatation supporting plate, air floatation micropores are formed in the upper surface of the magnetic suspension air floatation supporting plate, and the cleaning module comprises an air supply module and an air return module. According to the invention, continuous and uninterrupted assembly line type extraction and on-line processing of chips from an etching machine to downstream equipment are realized, and the production efficiency, the positioning precision and the cleanliness are remarkably improved.

The invention discloses a sulfydryl-functionalized high-performance chitosan homogeneous membrane which is prepared by taking chitosan and polyvinyl alcohol as substrates, L-cysteine as a modifier and tris (2-carboxyethyl) phosphine hydrochloride as a reducing agent through a non-solvent induced phase inversion method. Therefore, the inventor also establishes a preparation method of the chitosan homogeneous membrane as a binding phase of a thin film diffusion gradient technology. Finally, the thin film material with high adsorption capacity and rapid adsorption on mercury is innovatively prepared, and the DGT device taking the thin film material as a binding phase can rapidly, highly selectively and stably enrich mercury in a water body and is not interfered by other heavy metal ions; the technical problem that a biological membrane grows on the surface of a traditional DGT device due to long-time enrichment to interfere with accurate determination of mercury is successfully solved, the DGT technology is expanded to the field of complex determination of the concentration of trace Hg (II) in water, and the purpose of efficient, rapid and accurate determination is achieved.

The invention relates to a display panel and a display device, the display panel comprises a display area and a non-display area, the non-display area surrounds the outer side of the display area, the non-display area comprises a gate driving area and a retaining wall area, the retaining wall area is arranged on the outer side of the gate driving area, and the retaining wall area is arranged on the outer side of the gate driving area. The retaining wall area is configured to consume water vapor in the non-display area so as to prevent the water vapor from entering the gate driving area. Therefore, the retaining wall area is arranged on the periphery of the gate driving area, water vapor in the environment is blocked by means of the retaining wall area, the water vapor needs to penetrate through the retaining wall area to enter the gate driving area before entering the gate driving area, so that the difficulty that the water vapor enters the gate driving area is increased, the water vapor is consumed in the retaining wall area, and the water vapor amount is reduced. Therefore, water vapor is further prevented from entering the gate driving area, effective signals of the gate driving area are not interfered, and the display effect of the display device is improved.

This utility model discloses a convenient three-way valve for easy assembly and disassembly in the field of pipeline valve devices. It includes a valve mounting seat, a valve body, and a drive mechanism. The valve mounting seat has an opening in the middle, with three inner mounting bevels inside the opening. The valve body has corresponding outer mounting bevels on each of the three inner mounting bevels. The valve body has three connecting passages separated by a valve core, each extending from an inner mounting bevel into the valve body. The valve body is fitted into the opening, with the outer mounting bevels pressing against the inner mounting bevels. The three connecting passages within the valve body are sealed to the inner ports. The drive mechanism is mounted on the valve body and driven by the valve core, controlling the position of the valve core to open and close the three connecting passages. When maintenance or replacement is required, the cover plate of this three-way valve can be directly opened, and the valve body removed from the valve mounting seat without needing to chisel through the wall, maintaining the aesthetics and overall consistency of the wall. It is suitable for use in household and other applications involving in-wall pipe connections and conversions.

The utility model discloses a high temperature resistant anti-interference cable, specifically relates to the technical field of cables, and comprises a fixed core, six conductive units are arranged outside the fixed core, each conductive unit comprises an insulation wire core and an insulation shielding layer, the insulation wire core is wrapped by the insulation shielding layer, the six conductive units are twisted, and a filling layer is arranged outside the conductive units. A filling layer is arranged outside the cable body, a wrapping layer is wrapped outside the filling layer, a flame-retardant layer is wrapped outside the wrapping layer, a metal braid layer is arranged outside the flame-retardant layer, and a sheath layer is wrapped outside the metal braid layer. According to the utility model, the metal braid layer can transfer heat, the flame retardant layer can prevent the cable from being burnt out by external combustion, the cable can bear working conditions in a high-temperature environment, and normal operation of the cable in the high-temperature environment is ensured; the metal braid layer is arranged to shield the influence of external electromagnetic radiation on internal signals of the cable, and the insulation shielding layer is arranged outside the wire core to better ensure that the internal conductor is not interfered and ensure the stability and reliability of transmission.

The application discloses a wave energy power generation device, and belongs to the technical field of wave energy power generation.The device comprises a floating ball shell for floating on the water surface, a wave sail assembly, a power generation assembly arranged in the floating ball shell, and a locking assembly arranged between the floating ball shell and the wave sail unit.The wave sail assembly comprises a plurality of wave sail units arranged around the center plane of the floating ball shell, and the wave sail units are hinged to the floating ball shell.The power generation assembly comprises a plurality of power generation units arranged along the radial direction of the floating ball shell, a heavy ball arranged at the center of the floating ball shell, and a cable.The heavy ball is connected to the plurality of power generation units through the cable, and the heavy ball can be driven by force from different directions to generate power for the corresponding power generation units.The locking assembly can lock the wave sail units on the wave-encountering side to receive the wave energy to the maximum extent.The device can reduce the resistance of the side wings, reduce the loss of wave energy, collect energy from different directions, and improve the utilization rate of wave energy.

The invention relates to the technical field of steel strands, and provides a retard-bonded prestressed steel strand and a sheath damage detection method thereof.The retard-bonded prestressed steel strand comprises a prestressed steel strand body, a retard-bonded adhesive layer, a sheath and a plurality of wiring pieces, the retard-bonded adhesive layer is located between the prestressed steel strand body and the sheath, the sheath comprises an inner protective layer, a conductive layer and an outer protective layer; the conductive layer is located between the inner protective layer and the outer protective layer, and each wiring piece is connected with the sheath and is connected with the conductive layer. Therefore, automatic detection of the damage condition of the sheath can be realized by means of the conductive layer.

The utility model provides an emergency energy storage power supply system for coal mine key equipment. The emergency energy storage power supply system comprises a four-quadrant high-voltage frequency converter, a low-voltage PCS device and an auxiliary power supply system, the four-quadrant high-voltage frequency converter and the low-voltage PCS device share one phase-shifting transformer, high integration of the emergency energy storage power supply system is guaranteed, the four-quadrant frequency converter controls a load motor through cascade H bridge output, the alternating current side of the low-voltage PCS device is connected with a power grid through the transformer, and the direct current side of the low-voltage PCS device is a super capacitor module. After the main power grid loses power, the low-voltage PCS device provides energy for the four-quadrant high-voltage frequency converter, and continuous operation of the load motor is guaranteed. The four-quadrant frequency converter cabinet and the low-voltage PCS cabinet cooperate with each other to jointly complete energy conversion when the main power grid loses power or recovers power utilization. According to the utility model, a stable emergency energy storage power supply scheme can be provided for coal mine key equipment, and continuous and uninterrupted operation of a load motor is ensured.

The utility model discloses a ventilation module of a tank container and the tank container, comprising a ventilation pipe connected to a ventilation port of the tank container; the ventilation head is arranged at one end, far away from the ventilation opening, of the ventilation pipe; the ventilation head is provided with a head pipe body connected with the ventilation pipe, a cover body covering the upper end of the head pipe body and a filter screen located in the head pipe body. The cover body is provided with an upwarp part located on the periphery, and a ventilation opening is formed between the upwarp part and the head pipe body. When the volume of an oil product in the tank box changes, air can enter and exit from the tank box through the vent pipe via the vent hole of the vent head, so that the balance of air pressure inside and outside the tank box is effectively maintained, and the problems of tank box deformation, difficult oil inlet or unsmooth oil outlet caused by abnormal air pressure are avoided; and safe and stable operation of the tank is ensured. The filter screen is arranged in the ventilation head, dust, impurities and other particles in air can be filtered out in the process that the air enters and exits the tank box, the particles are prevented from entering the tank box to pollute oil products, the quality of the oil products is guaranteed, and the impurities are prevented from damaging oiling equipment and oiled machinery.

The utility model discloses a pretreatment system suitable for malonic acid device on -line analysis appearance, including sampling subassembly and with the intercommunication of integrated heat tracing pipeline's pretreatment subassembly, sampling subassembly includes sampling probe, process sampling primary valve and probe sampling cut -out valve of sequential intercommunication, and sampling probe inserts sampling pipeline, the pretreatment subassembly includes heat preservation box and sets up in its inside liquid inlet treatment pipeline and liquid outlet treatment pipeline, and heat preservation box is equipped with electric heater, makes the temperature in the box reach 120 DEG C, and the liquid inlet treatment pipeline and liquid outlet treatment pipeline in the pretreatment subassembly all are communicated with on -line analysis appearance through heat tracing pipeline. The utility model can guarantee that instrument system integration long -term stable operation, through high temperature control, effectively avoided the solidification of sample, guaranteed that the measured value is not disturbed, guaranteed that sample is not distortion and satisfies the process demand, provides more accurate data for the process, reduces the maintenance frequency of personnel, reduces the workload of maintenance personnel.

The present invention proposes a high-precision IRIG‑B (AC) time code demodulation method based on FPGA+MCU; the method is a B (AC) code decoding design based on the combination of FPGA+MCU and analog-to-digital conversion chip, and adopts a demodulation circuit with a digital circuit as the core. The method realizes the functions of some analog circuits in the analog method through digital circuits, thereby solving the problems in the prior art that time information is prone to bit errors and the demodulated second signal has large jitter.

The invention discloses a TBM double-track tunnel trackless transportation cross-line bypassing cushion layer rapid construction method, and belongs to the technical field of tunnel construction. According to the method, a construction area is divided into a plurality of construction sections in the longitudinal direction of a tunnel, construction and transport vehicle framing and side alternate operation is organized, and parallel cushion layer pouring and trackless transport are achieved; the method comprises the following steps of: performing radar detection and scabbling treatment on the top surface of an inverted arch block during construction preparation; installing a steel plate water stop belt, and penetrating through the ground beam and the drainage blind pipe; a detachable steel pipe is adopted for shaping and constructing a cushion drainage ditch; after a reinforcing mesh is laid, concrete pouring, multi-pass surface finishing, steam and heat preservation curing and temperature and humidity monitoring are conducted; by optimizing the construction organization and technology, the problems that transportation is interrupted, the construction period is long and cracking is prone to occurring in a traditional method are solved, efficient, high-quality and low-interference cushion layer construction is achieved, optimal construction parameters can be scientifically screened by setting a contrast test section, and adaptability is high.

The invention discloses a mechanical heavy-load safe separation device and an anti-falling device for a lifeboat, and relates to the technical field of heavy object hanging. The mechanical heavy-load safe release device comprises a thread assembly connected between a bearing piece and a load, the thread assembly comprises a screw and a thread sleeve which are in threaded connection and locked and fixed, and the screw or the thread sleeve is connected with the load and is configured to automatically slide down in the thread direction under the gravity action of the load after locking is relieved. The load is separated from the bearing part, and the lead angle of the screw and / or the screw sleeve is larger than the equivalent friction angle. The separating device is simple in structure and convenient to use, does not need to additionally establish a power system, is low in cost, can realize the separation operation of the load and the bearing piece only by virtue of the gravity action of the load connected with the separating device without the help of external force, and greatly reduces the influence of external factors on the separating process.

The utility model discloses a support vertical rod verticality detection apparatus, comprising a plumb bob assembly installed at an upper position of a support vertical rod and a detection assembly installed at a lower position of the support vertical rod when in use, the plumb bob assembly can be controlled to freely release or recover a plumb bob downwards, and is provided with a calibrated release point; the detection assembly is provided with a perpendicularity calibration point, and the release point and the perpendicularity calibration point vertically correspond to each other in position and are equal in distance from the supporting vertical rod. According to the utility model, the rapid installation of the detection device can be ensured, the verticality of the supporting vertical rod can be rapidly measured, the detection efficiency of the verticality of the supporting vertical rod can be improved, the detection device is convenient to carry by a worker, the construction time and the labor intensity of the construction worker are reduced, the detection device is convenient to carry by the construction worker, and the overall construction efficiency is improved.

The invention discloses a TDLAS (Tunable Diode Laser Absorption Spectroscopy) analyzer for H2O2 gas, and belongs to the technical field of gas concentration detection. In the H2O2 gas TDLAS analyzer, the inner surface of the gas path system in contact with H2O2 gas is subjected to inert treatment to form a chemical inert layer, so that the gas adsorption loss can be effectively inhibited; the optical path system is arranged in the heat preservation case, a stable physical environment is provided for TDLAS measurement, an instrument is almost not interfered by the field environment, and the long-term drift is extremely small; the laser driving module adopts a composite current source architecture and comprises an operational amplifier serving as an error amplification stage and a push-pull circuit serving as an output stage, so that the stability problem under high-current and high-frequency modulation is fundamentally solved, nearly ideal light source modulation signals are provided for TDLAS detection, and a basis is provided for high-precision harmonic detection. According to the invention, high-performance driving, enhanced protection and precise environment control are deeply coupled, and the precision, stability and reliability of H2O2 gas detection are effectively improved.

The strawberry grading cleaning device comprises a cleaning machine and a buffering belt, the buffering belt is arranged at the bottom end of a discharging port of the cleaning machine, supporting plates are fixed to the two sides of the bottom end of the buffering belt, cleaning pieces are arranged on the inner sides of the supporting plates, vertical rods are fixed to the two sides of the bottom end of the buffering belt, and the vertical rods are arranged on the bottom end of the buffering belt. The outer wall of the vertical rod is sleeved with a spring, the top end of the spring is connected with the bottom end of the buffer strip, the bottom end of the outer wall of the vertical rod is sleeved with a sleeve, the top end of the sleeve is connected with the bottom end of the spring, an auxiliary part is arranged on the inner side of the sleeve, and a supporting seat is fixed to the inner side of the auxiliary part. A clamping groove is formed in the top end of the supporting base. The cleaning pieces are arranged on the inner sides of the supporting plates on the two sides of the bottom end of the buffer strip, the cleaning ends of the scraping plates are always attached to the surface of the buffer strip through the scraping plates and the torsion springs on the rotating blocks, and juice and impurities adhering to the buffer strip due to strawberry damage can be effectively cleaned in time.