104results about How to "Wide temperature range" patented technology

The invention discloses polytetrahydrofuran ether amine polyurea with high elongation at break as well as a preparation method and application thereof, and belongs to the technical field of macromolecules. The raw materials comprise a component (A) and a component (B), wherein the component (A) is diisocyanate with a symmetrical linear molecular structure; the component (B) is polytetrahydrofuran ether amine with a symmetrical linear structure, and the molar ratio of the NCO functional group of the diisocyanate to the NH2 functional group of the polytetrahydrofuran ether amine is 1.07-1.00; the molecular structure of the polytetrahydrofuran ether amine polyurea with high elongation at break is a microphase separation structure composed of a hard segment and a soft segment, and the weight percentage of the hard segment relative to the soft segment is greater than 20%. The elongation at break of the polytetrahydrofuran ether amine polyurea product with high elongation at break is 1500% or above, and the polytetrahydrofuran ether amine polyurea product can meet the requirements of expansion joints of ballastless tracks of high-speed railways, expansion joints of highways and airport runways, electronic element potting and the like on the elongation at break of high-elasticity materials.

The invention discloses a multichannel optical fiber fluorescent temperature measuring device and method for an electrostatic chuck in an etching machine, and relates to the technical field of semiconductor etching. The device comprises temperature measurement sensors arranged in different areas of an electrostatic chuck, and each temperature measurement sensor comprises a fluorescent temperature measurement head, a ceramic sleeve, a switching optical fiber, a transmission optical fiber, an optical coupling module, a photoelectric detection module and a working light source module; wherein the fluorescent temperature measuring head comprises a fluorescent layer and a heat conducting layer which are stacked, the fluorescent layer is prepared through a hot pressing sintering method, the end face of the fluorescent layer is plated with gold, the heat conducting layer comprises a copper-diamond composite material, the end face of the heat conducting layer is plated with gold and is connected with the end face of the fluorescent layer through a vacuum backflow void-free welding process, and the ceramic sleeve wraps the switching optical fiber. The end face of the ceramic sleeve is plated with gold and is connected with the fluorescent temperature measuring head through a vacuum backflow void-free welding process. By adopting the device, the temperature measurement precision can be effectively improved, the temperature measurement range can be effectively widened, and the temperature distribution on the surface of the semiconductor wafer can be accurately measured.

The invention discloses an electrolyte of an aqueous zinc-iodine battery, and relates to the technical field of zinc-iodine batteries, the electrolyte is prepared from an I + stabilizer, a hydrogen bond ligand, a low-freezing-point hydrogen donor solvent and a zinc salt, and the molar ratio of the I + stabilizer to the hydrogen bond ligand to the low-freezing-point hydrogen donor solvent to the zinc salt is 1: 0.5: 5: 0.5-1.5. The invention also provides a preparation method of the electrolyte and a zinc-iodine battery prepared by using the electrolyte. The zinc-iodine battery constructed by the invention can realize highly reversible I- / I2 / I + conversion and rapid iodide conversion kinetics in a wide temperature range of-25 DEG C to 40 DEG C, and has high energy density and excellent long cycle stability. In addition, due to the unique solvation structure of the electrolyte, the activity of water molecules in the system is reduced, and then the hydrogen evolution reaction and other side reactions are inhibited. Therefore, the invention provides a feasible strategy for realizing wide temperature range, high capacity and high performance of the zinc-iodine battery.

The embodiment of the invention discloses a temperature measurement method and device based on infrared thermal imaging, in the embodiment, a non-contact temperature measurement mode is adopted, the temperature measurement range is wider, the measurement speed is high, a plurality of temperature measurement groups are set according to actual requirements, each temperature measurement group comprises a plurality of temperature measurement elements, and the temperature measurement efficiency is improved. However, the types of the temperature measurement elements of each temperature measurement group must be the same, thereby guaranteeing the consistency of subsequent data analysis, and carrying out the real-time temperature data collection of each temperature measurement group through employing an infrared thermal imaging device. According to the method, the accuracy and the real-time performance of data acquisition are ensured, so that subsequent accurate data analysis is facilitated, a temperature measurement element of which the correlation with the temperature data is greater than a set threshold value is selected as a target factor, a temperature curve is generated according to the target factor and the temperature data, and a temperature measurement formula is established according to the temperature curve, so that the temperature measurement precision requirement is met.

The present invention discloses a preparation method and application of Kappa-carrageenan flexible conductive organic gel suitable for ultra-wide temperature range. The present invention adds 18-crown ether-6 with good solubility to glycerol or a glycerol-based mixture to solubilize potassium salt, and selects Kappa-carrageenan as a gel matrix, and dissolves the above components by heating, and a stable Kappa-carrageenan flexible conductive organic gel can be obtained after cooling. The organic gel prepared by the present invention still maintains good flexibility after being refrigerated for 24 hours under an environment of 80°C, and can be stably present for a long time in a high temperature environment of up to 80°C, while having better mechanical and conductive properties. The preparation method of the present invention is simple, efficient, and low-cost, and can have a relatively broad application prospect in extremely harsh environments and flexible electronic devices.

The invention relates to the technical field of solid waste thermochemical treatment, and provides a method for treating waste incineration fly ash through plasma melting. Fly ash is pretreated and then enters a plasma furnace to generate a solid melt, the solid melt is quenched into vitreous slag through a slag cooler, and high-temperature waste gas generated by the melting furnace enters a high-temperature waste gas pretreatment and gas treatment system to be purified into gas meeting the environmental protection standard. An active carrier of organic particles prepared from silicon resin and silicon dioxide is added into the fly ash, so that dioxin molecules and heavy metals in the fly ash are respectively and firmly wrapped by a three-dimensional network, and the harmless reduction treatment problem of dioxin and cured heavy metals is solved; meanwhile, the problems that when plasma equipment treats the waste incineration fly ash, the melting glass transition temperature is too high, and the fly ash diffuses along with tail gas in the feeding process, so that a pipeline is blocked are solved.

The invention discloses a multi-channel synchronous control temperature field balance control system and a temperature field air fluid balance control algorithm, the system comprises a computer, a high temperature test box and a PLC controller, the PLC controller is connected with and controls a servo cross-flow fan blade module through an EtherCAT communication technology, and the PLC controller is connected with the servo cross-flow fan blade module based on the temperature field air fluid balance control algorithm. And precise and balanced control of air fluid in the test box is realized. Compared with the prior art, the multi-channel synchronous control temperature field equalization control system and algorithm have the advantages that the uniformity of the temperature field can be effectively controlled, the control precision of the temperature field is high, and the response speed is high.

A detachable top cover and a detachable bottom cover are arranged at the top and the bottom of a middle frame respectively, a concave cavity is formed in the middle frame, a sensor assembly is installed on the top of the concave cavity, a plurality of air guide pipes are arranged on the top cover, and the air guide pipes, vent holes in the top of the middle frame and the sensor assembly are sequentially communicated. Therefore, multi-channel pressure monitoring of the sensor assembly is realized. The main control circuit board is arranged on the bottom cover and is connected with the sensor assembly through a cable; and the electrical connector is arranged at the top of the middle frame and is respectively connected with the main control circuit board and an external power supply through cables. The multi-channel pressure sensor has the characteristics of compact structure, small size, high measurement precision and the like, and can well meet the multi-channel pressure measurement requirements of wide temperature range, small size, light weight, autonomous controllability, high measurement precision and high cost performance.

The invention discloses a high-temperature-resistant high-peel-strength pressure-sensitive adhesive, an aluminum foil adhesive tape and a preparation method. The preparation method of the high-temperature-resistant high-peel-strength pressure-sensitive adhesive comprises the following steps: preparing raw rubber from the following components in parts by weight: 5-15 parts of isopropanol, 200-220 parts of ethyl acetate, 120-140 parts of 2-ethylhexyl acrylate, 150-160 parts of n-butyl acrylate, 4-8 parts of hydroxyethyl acrylate, 10-15 parts of acrylic acid, 4-8 parts of beta-carboxyethyl acrylate and 0.5-1.5 parts of a peroxide initiator by adopting a method of solvent polymerization and step-by-step addition; the finished product glue comprises 90-110 parts of raw glue, 30-50 parts of tackifying resin, 10-30 parts of ethyl acetate and 0.5-1.0 part of a curing agent, the raw materials are weighed and uniformly stirred in a glue preparation kettle, the finished product glue is prepared, and the adhesive is good in high temperature resistance and also has excellent initial adhesion, peel strength and holding power. The aluminum foil adhesive tape prepared from the high-temperature-resistant high-peel-strength pressure-sensitive adhesive is high in tensile strength, strong in adhesive force, good in water resistance and corrosion resistance and good in high-temperature resistance, and can meet the application requirements of special occasions.

The utility model provides a multifunctional catalytic material evaluation system. The multifunctional catalytic material evaluation system at least comprises a gas raw material feeding branch, a liquid raw material feeding branch, a raw material mixer, a sulfide-resistant feeding branch, an inert gas feeding branch, a first three-way valve, a second three-way valve, a third three-way valve, a fourth three-way valve, a fifth three-way valve, a first heating furnace, a second heating furnace and a first reaction tube, a second reaction tube, a chromatographic instrument and a data processor. The multifunctional catalytic material evaluation system can support feeding of various raw materials such as gas, liquid, sulfides, inert gas and the like, and can be used for evaluating the catalytic material in a relatively wide temperature and pressure range by switching the three-way valve. Multiple functions of single evaluation of one catalyst sample, parallel evaluation of two catalyst samples, series evaluation of two catalyst samples, adsorption-regeneration cycle evaluation of two adsorbent samples and the like are realized.

The present application relates to a kind of compositions and applications comprising polyamide.The composition includes polyamide and sheet structure mineral powder, wherein, with 100 mass parts of polyamide, sheet structure mineral powder in the composition is 0.1-10 mass parts.The polyamide material in the present application has lightweight, easy processing, has cost advantage, compared with steel material has obvious advantage.Sheet structure mineral powder is added in polyamide material by intercalation modification, further improve the barrier property of product, effectively avoid "hydrogen embrittlement" risk, with "hydrogen embrittlement" resistance, low hydrogen permeability, and suitable for the temperature range of application, it has high toughness in low temperature environment condition, the performance of polyamide material reaches a good balance, and the comprehensive performance is better.Suitable for hydrogen pipeline, hydrogen storage bottle etc., has advantage in hydrogen energy automobile and other application scenarios.

The invention relates to the technical field of plant cultivation, and discloses a multifunctional plant growth box which comprises an upper cover, the upper cover is connected with side walls through connecting pieces, a base is slidably connected to the lower surfaces of the side walls, inserting grooves or connectors used for mortise and tenon joint are formed in the base, and the side walls and the base are fixed through the mortise and tenon joint connectors or the inserting grooves. The base is tightly combined with the side wall, a drainage hole is formed in the bottom of the base and is in butt joint with a drainage system, the inner interlayer is installed in the side wall, the base, the side wall and the upper cover are combined into a main body, the main body and the upper cover are both made of EPP materials, and a pipeline is arranged in the base. The EPP is composed of independent bubbles, the heat conductivity coefficient is about 0.039 W / m.K, and the EPP has high temperature resistance, can bear the temperature of-40 DEG C to 110 DEG C generally, is wider in temperature resistance range in a short time, has higher temperature, does not have performance change and does not release toxic substances, and the heat preservation and temperature resistance are beneficial to stabilizing the internal temperature and promoting plant growth.

The invention discloses a preparation method of a wide-temperature-range high-damping metal hollow sphere / polyurethane damping composite material, and relates to a preparation method of a damping composite material. The method comprises the following steps: 1, carrying out surface modification on metal hollow spheres; and 2, preparing the polymer. Compared with pure polyurethane, the prepared wide-temperature-range high-damping metal hollow sphere / polyurethane damping composite material has the advantages that the damping performance is greatly improved, the temperature range is widened, the excellent damping performance and acoustic performance are achieved, the preparation process is simple, the stability is high, and the composite material is suitable for large-area pouring and complex-shape base materials; wide application prospects are realized in the fields of ships, aerospace, vehicles, building materials and the like; after the surface-modified metal hollow spheres are compounded with polyurethane, the damping performance can be greatly improved, the temperature range is widened, the loss factor is increased from 0.45 to 0.85, and the effective temperature range is widened from 59.9 DEG C to 100 DEG C or above.

The present invention provides a high-temperature translation system for an oven, comprising an oven body, a mounting bracket fixedly provided on the outer wall of the oven body, a driving mechanism fixedly provided on the mounting bracket, the driving mechanism penetrates into the oven through a transmission mechanism and is connected to the translation mechanism, the translation mechanism moves horizontally in the oven body through the transmission mechanism; a support frame is fixedly provided in the oven body, the translation mechanism is installed on the support frame; a sensor assembly is fixedly installed on the mounting bracket, and the sensor assembly is connected to the driving mechanism through a toothed chain. The high-temperature translation system for an oven described in the present invention arranges a reduction motor on the outer side of the oven, so that major vulnerable equipment such as control components and reduction motors do not work in high-temperature areas, thereby reducing equipment production costs and equipment failure rates, improving equipment reliability and equipment precision, and having good heat dissipation effects.

The invention discloses an oil field oil layer delayed heat release chemical blocking remover and a preparation method and application thereof, and relates to the field of oil field development technologies. Raw materials comprise a component A, a component B and a catalyst; the component A comprises the following raw materials in percentage by mass: 20-31% of ammonium chloride and 69-80% of water; the component B comprises the following raw materials in percentage by mass: 26-40% of sodium nitrite, 4-6% of solvent oil, 1-2% of mixed aromatic hydrocarbon, 1-2% of an emulsifier, 0.2-1.5% of a paraffin dispersant, 1-2% of a mutual solvent, 0.5-1% of alkyl sulfonic acid metal salt and 47.8-64% of water; the catalyst is monopotassium phosphate. The chemical blocking remover provided by the invention not only has excellent wax dissolving and preventing effects, but also has the characteristics of controllable reaction time and delayed heat release, can be adjusted according to site requirements, is suitable for different well depths, is convenient for site construction, and does not pollute an oil layer.

The present invention discloses an isothiocyanato trans-cyclohexylbiphenyl liquid crystal composition and its application. The liquid crystal composition uses an isothiocyanato trans-cyclohexylbiphenyl liquid crystal compound as the first component, and the first component contains at least one compound represented by structural formula (I): wherein R1 is selected from an alkyl group containing 1 to 10 carbon atoms or an alkyl group containing an alkenyl group; X1 to X8 are each independently selected from -H, -CH3, -F or -Cl. The liquid crystal composition also includes a second component, and three or more components among a third component, a fourth component and a fifth component. The birefringence value (Δn) of the liquid crystal composition of the present invention is greater than 0.37, and its microwave frequency insertion loss is reduced, and the dielectric loss value (tanδε r,max ) are all less than 0.0065, the phase modulation amount (τ) is greater than 0.30, and the quality factor (μ) is higher than 50.

The present application provides a liquid crystal composition and a liquid crystal display device thereof. The liquid crystal composition of the present application comprises at least one compound of general formula P, at least one compound of general formula B and at least one compound of general formula C. The liquid crystal composition of the present application has good optical anisotropy, comparable clearing point, good absolute value of dielectric anisotropy, high K value (K 11 , K 33 ), comparable rotational viscosity, short response time, high transmittance, high contrast, long low-temperature storage time and large absolute value of Flicker, so that the liquid crystal display device comprising the same has good contrast, wide temperature range of use, good transmittance and less flicker and good screen display effect.

A ferroelectric nematic liquid crystal molecule and its application, relating to the technical field of optoelectronic materials, solves the problems of narrow phase transition temperature range, poor room temperature stability and difficulty in achieving ferroelectricity of traditional liquid crystal molecules due to symmetry restrictions in ferroelectric liquid crystal materials in the prior art. The ferroelectric nematic liquid crystal molecules ETA094 and ETB095 prepared by the present invention present a "V"-shaped liquid crystal molecular structure, and polar molecules are connected at the end groups of the "V"-shaped molecular structure. This structure breaks through the limitations of the symmetrical structure of traditional rod-shaped liquid crystal molecules, so that the molecules present chirality and have unique ferroelectricity, and make the intermolecular forces stronger, making it easier to form a liquid crystal phase with fluidity. The nematic ferroelectric liquid crystal molecules prepared by the present invention can achieve an ultra-wide phase transition temperature of ‑100°C to 250°C, and are high-performance ferroelectric liquid crystal materials with high spontaneous polarization intensity and strong nonlinear optical response, and have broad application prospects.

This utility model relates to a highly reliable adaptive stable power supply. It primarily addresses the technical problem of existing conventional battery systems having a narrow applicable temperature range, making it difficult to meet the stable power supply requirements of electromechanical equipment in extreme environments. The technical solution of this utility model is as follows: the stable power supply includes a temperature monitoring module, a temperature display module, a core control module, a power adapter module, and a power output interface. The output end of the temperature monitoring module is connected to the receiving end of the core control module, the control end of the core control module is connected to the interface of the power adapter module, and the output end of the core control module is connected to the display port of the temperature display module. The core control module is composed of a single-chip microcomputer; it receives monitored data and transmits it to the temperature display module in real time. It uses a neural network-based recognition method to determine the temperature range and sends timely commands to the power adapter module. The output end of the power adapter module is connected to the power output interface.

The utility model discloses a corrosion-resistant corrugated pipe, and belongs to the technical field of corrugated pipes. The corrosion-resistant corrugated pipe comprises a corrugated pipe body, an outer layer is arranged on the surface of the corrugated pipe body, a first fireproof layer is arranged on the inner surface of the outer layer, a first anti-expansion layer is arranged on the inner surface of the first fireproof layer, and a waterproof layer is arranged on the inner surface of the first anti-expansion layer. According to the corrosion-resistant corrugated pipe, when the corrugated pipe body is used for wiring of a cable, due to the fact that the smooth surface is arranged on the inner surface of the inner layer, threading of the cable is facilitated, and when the cable is short-circuited or a fire occurs beside the outside corrugated pipe body, the first fireproof layer and the second fireproof layer are both made of aerogel solid materials, and therefore the cable can be prevented from being damaged. The aerogel is stable in chemical performance, resistant to high temperature, wide in use temperature range and long in service life, the corrugated pipe body can be effectively prevented from being damaged by external high temperature, and then the cable in the corrugated pipe body is protected.

The utility model provides a multi-level heat preservation electronic wire harness, which belongs to the technical field of electronic wire harnesses and comprises a wire harness body and connectors, the left end and the right end of the wire harness body are electrically connected with the connectors, the wire harness body comprises a core wire, a heat preservation layer, an anti-freezing layer, a heat insulation layer and an insulation layer, the core wire is located on the innermost side of the wire harness body, and the heat preservation layer is wrapped on the core wire. The outer side surface of the heat preservation layer is coated with an anti-freezing layer. According to the utility model, the insulating layer is arranged, the insulating layer is made of the fluorosilicone rubber material, the fluorosilicone rubber has a wider temperature-resistant range, can be usually used in a temperature range of-50 DEG C to 250 DEG C, and has excellent heat resistance and oxidation resistance, and the electrical insulation property of the fluorosilicone rubber is equivalent to that of silicone rubber, so that the insulating property of the fluorosilicone rubber is ensured; however, due to the enhanced chemical corrosion resistance, the fluorosilicone rubber is possibly more suitable for use in some special environments, and the fluorosilicone rubber cannot be hardened at low temperature, so that the flexibility of the wire harness body 1 is ensured, and the service life of the wire harness body is ensured.

The present invention provides a liquid crystal composition and a liquid crystal display device comprising the same, wherein the liquid crystal composition comprises at least one compound of formula I and at least one compound of formula II. Through the selection and compounding of components, the liquid crystal composition has a higher clearing point, appropriate optical anisotropy, appropriate dielectric anisotropy, lower rotational viscosity, a larger elastic constant K value, a shorter response time and a faster response speed, a smaller dark state transmittance, a larger bright state transmittance and a higher contrast, so that the liquid crystal display device comprising the same has a better contrast, a higher transmittance, a faster response speed, a shorter refresh time and a wider operating temperature range, which helps to significantly improve the display effect of the liquid crystal display and is suitable for display modes such as VA, PSVA, IPS, and NFFS.

The application provides a kind of alkaline zinc iron liquid flow battery electrolyte and its application, belong to liquid flow battery technical field.The negative electrode electrolyte of the application is prepared into suspension by dissolving zinc bromide in strong alkali solution;The concentration difference exists in the alkali concentration of positive and negative electrode electrolyte, and the alkali concentration of positive electrode electrolyte is lower than that in negative electrode electrolyte.The use of positive and negative electrode electrolyte of the application can effectively alleviate the migration problem of alkaline zinc iron liquid flow battery electrolyte, improve the energy density of negative electrode electrolyte, widen the applicable temperature range of battery, and improve the reliability of battery.

The application discloses a SARADC circuit for a temperature sensor, which comprises a CDAC array, a comparator, a SAR logic module and a temperature mode switching circuit. A pre-temperature sensor utilizes the temperature characteristics of the base-emitter voltage of a triode to generate a double-terminal voltage whose voltage difference linearly changes with temperature. The application first compensates for the inherent offset voltage of the temperature-sensing pre-stage circuit through the SARADC structure, and then converts the difference of the double-terminal voltage generated by the pre-temperature sensor and changing with temperature into an 8-bit binary digital signal, so that the temperature signal is represented by the quantized digital signal. The application changes the temperature range of ADC quantization by switching the reference voltage module of ADC. In the application, the difference of the double-terminal output voltage of the temperature sensor changes by 0.0039V when the temperature changes by 1 DEG C, and the LSB value of the SARADC is also 0.0039V, that is, the unit output digital signal of the SARADC changes correspondingly to the temperature change of 1 DEG C, so that the quantization temperature efficiency is effectively improved.

The neutron beam detection device of the present application is provided with: a first solar cell type detector, which has a conversion film attached to its surface that converts neutrons into any one of a charged particle beam of a photon, an alpha particle, a proton, a lithium nucleus, a gamma ray, and a beta ray, and generates a current by incident radiation; a radiation detector that generates a current having no sensitivity to neutrons as an output signal due to radiation incident; a current measurer that detects the current generated by the first solar cell type detector and the current generated by the radiation detector due to radiation incident as signals; and a flux calculation section that compares the current signals from the detector detected by the current measurer. The flux calculation section corresponds the detected current signals from the solar cell type detector and the radiation detector to a relationship between the flux of a prescribed kind of incident radiation and the detected current from the solar cell type detector and the radiation detector, which is obtained in advance, and calculates the flux of the neutron beam.

The application discloses a temperature control device for ice block low-temperature mechanical test and a method thereof, and belongs to the technical field of low-temperature mechanical test. The temperature control device comprises a temperature control mechanism, a heat preservation mechanism is arranged on the temperature control mechanism, the temperature control mechanism comprises a base and a cooling assembly, two bottom frames are fixedly connected to the top of the base, a fixing frame is fixedly connected to the top of each bottom frame, a test cavity is fixedly connected between the two fixing frames, the test cavity is connected with a refrigeration equipment through a hose at two sides, the refrigeration equipment is installed on the base through a support, and the two sides of the test cavity are connected with two ends of the cooling assembly. The upper sealing assembly is in contact with the bottom frame to generate a pushing force through the descending of the heat preservation cavity, the inflatable air bags are inflated and closely attached to each other at the moment, the test cavity can be kept closed, low-temperature overflow is reduced, the specified detection temperature can be quickly reached, and the detection efficiency is improved.

The present invention relates to a reference voltage source circuit, a voltage trimming calibration method and a stability compensation method. The circuit comprises: a current source is connected to the emitter of a triode to obtain a node V1, V1 is connected to the inverting input terminal of an operational amplifier, the base and collector of the triode are connected and then grounded; the positive input terminal of the operational amplifier is connected to the gate of a transistor M5 to obtain a node V2, V2 is connected to the drain of M5 and then connected to the gate of a transistor M6 and a first MOS module respectively; the output terminal of the operational amplifier is sequentially connected to transistors M3 and M4, the drain of M3 is connected to the source of M5, the drain of M4 is connected to the source of M6; the drain of M6 is connected to a second MOS module. The present invention constructs a reference voltage source circuit, and performs voltage trimming calibration and stability compensation on it.

The invention discloses a quantum voltage noise thermometer based on quantum Hall resistor, comprising a quantum Hall resistor, a quantum voltage pseudo-noise source, a switch conversion circuit, two-way amplification and filtering circuits, and a data acquisition and processing circuit; the input end of the switch conversion circuit is electrically connected to the output end of the quantum Hall resistor and the quantum voltage pseudo-noise source respectively, and the output end is electrically connected to the amplification and filtering circuit and the data acquisition and processing circuit in sequence; each amplification and filtering circuit comprises a preamplifier, a first low-pass filter, a buffer amplifier, and a second low-pass filter electrically connected in sequence; the data acquisition and processing circuit comprises two analog-to-digital converters and a data processing circuit, and the input end of each analog-to-digital converter is electrically connected to the output end of one amplification and filtering circuit. The invention adopts quantum Hall resistor as a resistance detector, avoiding the problem of resistance value change of other resistors in a low-temperature and strong magnetic field environment, and can realize primary temperature measurement in a wide range of strong magnetic fields and a wide range of low temperatures.

The present invention is applicable to the fields of nuclear power and military technology, and provides a step-by-step test method for measuring the high-temperature Poisson's ratio of a slender tube, including step S10: setting and calculating a first room temperature radial parameter through a room temperature radial measurement device test; step S20: obtaining a second room temperature radial parameter through a high temperature radial measurement device test; step S30: obtaining a correction coefficient based on the first room temperature radial parameter and the second room temperature radial parameter; step S40: performing a high temperature test to obtain a radial parameter at a preset temperature, and correcting it based on the correction coefficient to obtain a corrected high temperature radial parameter; step S50: obtaining an axial elastic modulus at a preset temperature, and calculating the Poisson's ratio based on the axial elastic modulus and the corrected high temperature radial parameter. The present application splits the high temperature Poisson's ratio test of a slender tube into two independent tests through the concept of an intermediate variable, thereby solving the problem of the difficulty in efficiently and accurately measuring the Poisson's ratio at high temperatures.

The invention belongs to the technical field of rapid food detection, and specifically relates to a preparation method and application of a MOFs-based composite pretreatment material for eliminating CAP interference. First, a metal organic framework suspension is prepared. Ammonia water is added to an iron salt solution, and a magnetic nanoparticle suspension is obtained through centrifugation, washing, drying and redissolution. The magnetic nanoparticle suspension is mixed with the metal organic framework suspension and heated. The metal organic framework solution modified with a magnetic material is obtained through centrifugation, washing, drying and redissolution. An amidated polysulfone solution is added to prepare droplets, and the droplets are solidified in water to obtain a MOFs-based composite pretreatment material. The MOFs-based composite pretreatment material is used for detecting numbing substances in spicy hot pot base materials that resist the interference of capsaicin. The MOFs composite material prepared by the invention can eliminate CAP interference, has high stability and a wider temperature application range, provides reliable guarantee for real-time and on-site detection of numbing substances in actual production, and has broad application prospects.