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2064 results about "Thermoscope" patented technology

A thermoscope is a device that shows changes in temperature. A typical design is a tube in which a liquid rises and falls as the temperature changes. The modern thermometer gradually evolved from it with the addition of a scale in the early 17th century and standardisation through the 17th and 18th centuries.

Prediction method for failure diffusion of nodes of grid steel structure

The invention relates to a grid steel structure node failure diffusion prediction method, which comprises the following steps of: forming a failure inducement and evolution path model according to a connection form of a bolt-sphere node and a welding node, a stress transfer path, node local yield and fatigue accumulation factors; a diffusion logic of node failure-force flow redistribution-adjacent node stress concentration-chain reaction is constructed; nodes are regarded as middle points of the graph, rod pieces are regarded as edges, and propagation weights between the nodes are defined; the weight parameters are dynamically assigned based on material attributes, node connection types, spatial geometric positions and historical stress states; multi-source monitoring sensors including strain gauges, displacement meters, thermometers and accelerometers are arranged at key nodes of the grid structure, so that node states are sensed; in combination with real-time monitoring data, extracting strain rate change, vibration characteristics, frequency drift and residual deformation key characteristics of each node; a node health state feature vector set is constructed by using time sequence analysis, and the gradual degradation trend of nodes is reflected.
Owner:SHAOXING TUOHUA ENG DESIGN CONSULTING CO LTD

Spraying process self-adaptive adjustment method based on temperature measurement

The invention relates to the technical field of spraying process control, and discloses a spraying process self-adaptive adjustment method based on temperature measurement. The method comprises the steps that target coating parameters and base material physical property data are obtained, and initial spraying control parameters are generated through a first intelligent calculation model in combination with historical process data and real-time environment monitoring data; when spraying is executed, heat distribution data of a spraying area are collected in real time through a temperature sensing device, and according to the difference between the heat distribution data and a preset target temperature interval, technological parameters are dynamically corrected through a first self-adaptive regulation and control algorithm; meanwhile, a machine vision system is used for capturing actual coating morphological characteristics, and after the actual coating morphological characteristics are compared with target parameters, excitation parameters are adjusted in a partitioned mode through a second self-adaptive regulation and control algorithm so as to optimize uniformity; and collecting whole-process data, comprehensively evaluating the whole-process data through the second intelligent calculation model to generate a process optimization instruction, and updating the first intelligent calculation model and the first self-adaptive regulation and control algorithm parameters according to the process optimization instruction.
Owner:ZHEJIANG FIVE LOAVES TWO FISH IND CO LTD

Bluetooth food thermometer and assembly thereof

The present invention relates to a Bluetooth food thermometer and an assembly thereof, where the Bluetooth food thermometer includes a shell in which a temperature measuring component is movably arranged; a fall resisting component is arranged between the temperature measuring component and the shell; the temperature measuring component includes a copper tube antenna and a first circuit board; a first end of the copper tube antenna is connected with the first circuit board through a fastener; and a second end of the copper tube antenna is electrically contacted with the shell. In the present invention, the fall resisting component is arranged between the temperature measuring component and the shell, so that the food thermometer can protect the temperature measuring component from different directions when falling; and, during assembly, the fall resisting component can position the temperature measuring component for easy assembly.
Owner:HUANG ZHICAN

Micro-reactor real-time control system for fine chemical engineering

The invention relates to the technical field of temperature control, and particularly discloses a micro-reactor real-time control system for fine chemical engineering, and the system comprises an acquisition module which calculates a standard temperature according to the temperature at a monitoring point, and periodically obtains the standard temperature in a preset acquisition period; the analysis module is used for calculating a temperature difference value, obtaining a maximum temperature difference value and obtaining a temperature change value; coordinate points are generated and fitted to obtain a fitted curve, and the total number of reference points on the fitted curve is counted; and the adjusting module is used for calculating the judgment value, determining whether to adjust the power of the temperature adjusting module or not according to the judgment value, and adjusting the power of the temperature adjusting module according to the fitting curve. According to the invention, the environment temperature in the microreactor can be kept stable, and the complexity of controlling the temperature in the pipeline is reduced.
Owner:NANJING COLLEGE OF CHEM TECH

Fabricated refrigerating room energy-saving monitoring system based on data analysis

The invention discloses an assembly type refrigerating machine room energy-saving monitoring system based on data analysis, and relates to the technical field of energy-saving control, and the system comprises an interval module which is used for dividing the space of a machine room into a plurality of monitoring intervals, and is bound with a structural unit; the excitation module is used for applying power disturbance to the structural unit to obtain structural excitation data; the identification module is used for generating a heat influence coefficient matrix according to the excitation data and the temperature change of the adjacent monitoring interval; and the calculation module is used for calculating a blind area temperature and outputting an estimated temperature and a covariance based on the heat influence coefficient matrix, the structure energy consumption data and the adjacent interval temperature. According to the invention, the space of the machine room is subjected to three-dimensional grid division through the interval module, and each monitoring interval is bound with the function nodes in the structure of the machine room, so that the temperature monitoring grid with the corresponding relation between the space and the structure is formed, the space expression precision of monitoring data is improved, and the monitoring efficiency is improved. And a structural support is provided for positioning and temperature compensation of a blind area position.
Owner:HUNAN ZHONGJIAN QIPEI TECH CO LTD

Real-time calibration system and method for position precision of fast steering mirror

The invention discloses a fast steering mirror position precision real-time calibration system and method. According to the system, a temperature sensor is arranged on each motor of the fast reflecting mirror, the detection temperature of each motor of the fast reflecting mirror is measured in real time through the temperature sensors, a temperature cycle test is carried out in combination with a high-low temperature box and a theodolite, and the calibration temperature is calculated based on the detection temperature of each motor through a processing assembly; generating a calibration model according to the calibration temperature and the position of the fast steering mirror obtained by multiple tests; and finally, the position precision of the fast steering mirror is calibrated through the calibration temperature and the calibration model which are acquired in real time. Real-time detection and calibration can be realized, and errors can be further eliminated, so that the real-time performance is improved, and the position precision of the fast reflecting mirror is improved. The technical problems that the real-time performance is poor, and the position precision of the fast steering mirror is not high are solved.
Owner:CHANGCHUN SUMMIT PHOTOELECTRIC TECH CO LTD

Surface thermometer calibration system

The invention provides a surface thermometer calibration system. The surface thermometer calibration system comprises a surface heat source device, a control host, a temperature control thermometer, a reference surface thermometer and a standard thermometer, the surface heat source device comprises a glass cover, a constant-temperature disc heat source, an upper protection structure, an adjustable support and a cooling fan. The control host comprises a dual-channel high-precision thermodetector, a dual-channel program-controlled output voltage-stabilized power supply and a control module, and the control module is used for obtaining measurement results of the temperature control thermometer, the reference surface thermometer and the standard thermometer and dynamically adjusting the output voltage of the dual-channel program-controlled output voltage-stabilized power supply according to the measurement results. Temperature control of the constant-temperature disc heat source is achieved. According to the surface thermometer calibration system designed and developed by the invention, the reliability and the calibration efficiency of surface thermometer calibration can be remarkably improved, and the reliability of surface temperature value traceability is ensured.
Owner:CHANGZHOU INST OF INSPECTION & TESTING STANDARDS CERTIFICATION

Temperature control valve fault detection method based on big data analysis

The invention relates to the technical field of temperature control valve fault detection based on big data analysis, and discloses a temperature control valve fault detection method based on big data analysis. Acquiring and cleaning temperature data according to a set sampling interval; calculating a temperature difference in combination with a set temperature and verifying a baseline period sample; extracting a maximum temperature difference, a minimum temperature difference and an envelope width by using a sliding window in the baseline period, and determining a compensation constant; calculating a baseline oscillation coefficient and statistical characteristics based on window analysis; continuously extracting real-time oscillation coefficients during operation; dynamically generating a time-varying threshold value according to historical characteristics and real-time parameters; and comparing the real-time coefficient with a threshold value to judge a fault and generate a structured log, and finally uploading the structured log to a big data platform. Through systematic data preprocessing, multi-scale feature extraction and dynamic threshold adjustment, the method overcomes missing report and false report under the influence of a fixed threshold and noise, and realizes online closed-loop automatic fault early warning and log management.
Owner:ZHEJIANG BAIYILUN INTELLIGENT CONTROL SYST CO LTD

Rolled piece temperature control system based on steel rolling process

The invention discloses a rolled piece temperature control system based on a steel rolling process, which relates to the technical field of steel rolling and comprises a detection module, a control module, an execution module and a cooling module, the detection module comprises infrared thermometer arrays, an ultrasonic thickness gauge, an electromagnetic flowmeter, a pressure transmitter and a thermal resistance thermometer, and the infrared thermometer arrays are used for being arranged in front of and behind a cooling section and respectively collecting initial temperatures before entering a cooling system. Through the self-adaptive PID algorithm, the finite difference heat conduction model and the Smith pre-estimation compensation strategy are combined, the problem of control delay caused by the large lag characteristic in the cooling process is solved, control parameters can be dynamically adjusted according to the rolling speed, the steel grade characteristic and the like, temperature adjustment better fits the actual working condition, and the control precision is improved. The phenomenon of supercooling or insufficient cooling in a traditional control mode is fundamentally avoided, and the uniformity and stability of the performance of rolled pieces are guaranteed.
Owner:HEFEI ORIENT METALLURGICAL EQUIP

Automatic control system for preparing manganous-manganic oxide from impurity-containing manganese liquid and use method of automatic control system

The invention provides a control system for preparing manganous-manganic oxide from impurity-containing manganese liquid. Comprising a synthesis kettle; the feeding metering pump set comprises a liquid caustic soda metering pump and a pre-synthesis liquid metering pump; the valve group comprises a discharge valve, a steam valve and a pure water valve; the pH meter is arranged on the synthesis kettle; a first flow meter; a second flow meter; the M01 stirring motor is arranged on the synthesis kettle and is used for mixing solutions in the kettle; the M02 stirring motor is arranged on the overflow liquid receiving tank; the air blower is arranged on a pipeline connected with the synthesis kettle; the first liquid level meter is arranged on the synthesis kettle; the second liquid level meter is arranged on the overflow liquid receiving tank; and the thermometer is arranged on the synthesis kettle and is used for monitoring the temperature of the solution in the synthesis kettle. The system further comprises a central controller. By means of the system, the feeding state of the synthesis kettle can be automatically regulated and controlled, monitoring, debugging and alarming of the preparation process are facilitated, meanwhile, feeding of feeding liquid is stable, the temperature of the synthesis kettle is accurately controlled, and the fluctuation range of the pH value is small.
Owner:ZHEJIANG KEFEI TECH CO LTD

Temperature increasing and decreasing temperature detection system and method for incubator

The invention relates to the technical field of laboratory equipment, in particular to an incubator heating and cooling temperature detection system and method.The incubator heating and cooling temperature detection system comprises a temperature detection module, a temperature setting module, a temperature calculation module and a temperature control module; threshold data of the test box can be set through the temperature setting module, the temperature calculation module calculates the temperature data based on the threshold data to obtain calculation data, and the temperature control module controls the temperature of the test box based on the calculation data. According to the method, the temperature of the test box can be effectively detected and controlled through the arrangement of the temperature detection module, the temperature setting module, the temperature calculation module and the temperature control module, so that the problem that the temperature of an existing test box cannot be pre-adjusted is solved.
Owner:CHONGQING YINHE EXPERIMENTAL EQUIP

Multi-axis cooperation method for industrial master

The invention relates to the technical field of industrial master machine multi-axis coordination, and particularly discloses an industrial master machine multi-axis coordination method, which comprises the following steps of: selecting thermomagnetic sheets with thermomagnetic coupling characteristics, respectively embedding the thermomagnetic sheets into key parts of corresponding motion axes of a multi-axis machine tool, and simultaneously installing a high-precision magnetic field sensor in a main shaft of the multi-axis machine tool, the receiving module is used for receiving a magnetic field vector of each motion axis in each monitoring time point; collecting the temperature of each motion shaft in each monitoring time point, and calculating the thermal deformation amount of each motion shaft corresponding to the next time point; therefore, each motion shaft is dynamically judged and analyzed, and finally, the position compensation of each motion shaft corresponding to the next time point is realized, so that the machining precision and efficiency of the multi-shaft machine tool are improved, and the reliability, maintainability and intelligent level of the system are enhanced. The application of the technology has important practical significance and development potential in the modern manufacturing industry, and is a necessary means for realizing efficient, precise and intelligent manufacturing.
Owner:SUZHOU CHUYIJIE TECH CO LTD +2

Temperature measurement device, temperature measurement method, and temperature measurement program, and wafer production apparatus

Provided is a temperature measurement device for, in a situation where the temperature of a silicon wafer which is a measurement target is indirectly measured, removing, from actually measured radiance, the effects of radiance coming from a chamber member, and calculating the amount of change in the temperature of the measurement target. The temperature measurement device comprises: a chamber for accommodating a measurement target object; a heating unit; a chamber window at a position in the chamber opposite from the measurement target object; a temperature measurement unit for measuring the temperature of the measurement target object and the chamber window; and a computation unit for calculating the temperature of the measurement target object from detected values of the temperature measurement unit. The computation unit is provided with: a conversion unit for generating, from actually measured temperatures calculated from the detected values of the temperature measurement unit, conversion data pertaining to the amount of change in the temperature of the measurement target object corresponding to the amount of change in the temperature of the chamber window; a condition acquisition unit for acquiring a condition under which the measurement target object is heated; a detected value acquisition unit for acquiring a detected value of the temperature measurement unit; and a temperature correction unit for estimating the temperature of the measurement target object by using the conversion data to correct an actually measured temperature calculated from the detected value of the temperature measurement unit.
Owner:EPICREW CORP

Diaphragm valve flow testing system and method

The invention discloses a diaphragm valve flow test system and method, and the system comprises a first test assembly and a second test assembly, and a first pressure measurement port of the first test assembly and a second pressure measurement port of the second test assembly are respectively communicated with a to-be-tested valve; a first test pipeline communicated with the first test assembly is provided with a circulation path in a first direction; a second testing pipeline communicated with the second testing assembly is provided with a circulation path in the first direction. The upstream and downstream pressure values of the to-be-tested valve can be accurately detected through the first pressure gauge and the second pressure gauge, and the gas flow value is detected through the flow meter and substituted into a calculation formula to obtain an accurate flow coefficient value; the upstream first testing assembly and the downstream pressure measuring device are arranged at a specific distance according to the pipe diameter of the communicating pipeline, and the accuracy of the pressure value can be effectively ensured through the limitation of the pipe diameter and the distance; the actual temperature value of the fluid in the test system pipeline is monitored through the thermometer, and the influence of the temperature on the test result is effectively reduced.
Owner:SHANGHAI JUKE FLUID CONTROL CO LTD

Temperature and emissivity joint inversion method for multispectral temperature measurement

The invention discloses a temperature and emissivity joint inversion method for multispectral temperature measurement, and relates to the field of non-contact temperature measurement of high-temperature targets. In order to solve the defect that in the prior art, combined inversion of the emissivity cannot be realized under the condition that the emissivity does not need to be known in advance, the technical scheme provided by the invention comprises the following steps: establishing a multispectral temperature measurement model, constructing a temperature calculation model under each channel, and outputting a plurality of sub-objective functions for optimization; constructing a weighted objective function used for optimization solution; outputting a global optimal solution as an initial point; constructing an optimization model with a penalty function, and outputting the target temperature and the spectral emissivity; and performing simulation verification based on the inversion result, performing error evaluation by setting a typical emissivity curve and a real temperature, and outputting an algorithm precision index. The method is suitable for non-contact high-precision temperature and emissivity combined measurement of a high-temperature target in a complex spectrum environment.
Owner:HARBIN ENGINEERING UNIVERSITY SANYA NANHAI INNOVATION & DEVELOPMENT BASE +1

Temperature control method and system for fast temperature change test box

The invention relates to the field of data processing, in particular to a rapid temperature change test box temperature control method and system, and the method comprises the steps: collecting the internal temperature and external temperature of a test box in real time; calculating the internal and external temperature change consistency of the local time period at the current moment; calculating a correction value of the internal temperature at the current moment by using the internal and external temperature change consistency; and presetting a gain parameter vector, calculating an adjustment value of the gain parameter vector at the current moment, inputting the adjustment value of the gain parameter vector at the current moment and an error between the correction value of the corresponding internal temperature and the target temperature in the test box into a PID controller, outputting a control signal, and performing temperature control on the test box according to the control signal. According to the invention, by adaptively adjusting the gain parameter, the overshoot caused by too fast system response speed and the oscillation phenomenon caused by the overshoot can be effectively avoided, so that the temperature change in the test box is more stable, and the stability of the temperature control process is ensured.
Owner:WUHAN CLIMATE EQUIP

Nuclear fuel pellet out-of-pile cracking in-situ monitoring system and method

The invention discloses a nuclear fuel pellet out-of-pile cracking in-situ monitoring system and method. The system comprises an experiment box, a sample table, a first thermometer, a second thermometer, a blue light source, a spectrometer, an infrared camera, an optical camera and a graphic server. The spectrometer divides the light of the light guide measurement channel into visible light and infrared light which are respectively irradiated to the optical camera and the infrared camera. Since the first temperature collected by the first thermometer and the second temperature collected by the second thermometer are more accurate temperatures, the infrared photo can be calibrated, and more accurate temperature distribution can be obtained. The cracking morphology of the pellet sample can be captured in real time by a picture shot by the optical camera, so that the temperature field of the infrared picture and the cracking morphology of the optical picture are synchronously matched, non-contact temperature-optical coupling in-situ measurement in a pellet sample out-of-pile heating experiment is realized, the influence of a measuring instrument on the cracking process of the pellet sample is reduced, and the measurement accuracy is improved. The research on the evolution mechanism of the cracking of the pellet sample under different thermal stress conditions is facilitated.
Owner:SHENZHEN UNIV

Quantitative testing device for ammonia nitrogen substances in fly ash

The utility model relates to a quantitative testing device for fly ash ammonia nitrogen substances, and relates to the field of fly ash detection devices. The device comprises a material containing box, a material containing container and an ammonia gas detector, the bottom face of the material containing box is provided with an opening, a material supporting piece is arranged at the opening of the material containing box, the vertical end face of one side of the material containing box is communicated with a gas inlet piece, a plurality of heating resistors are vertically fixed to the inner wall of the material containing box, and an electronic thermometer is fixed to the front end face of the material containing box; a gas guide pipe is vertically communicated and fixed to the top surface of the material containing box, a gas pump is communicated and assembled to the gas guide pipe, an absorption solution is injected into the material containing container, and an ammonia gas sensitive electrode is fixed to the top surface of the material containing container in a manner that the absorption solution is inserted into the top surface of the material containing container. The influence of the temperature on the concentration rule of ammonia volatilization is detected by adjusting the temperature, the influence of the ammonia on the concrete can be detected in the later period, meanwhile, the amount of the denitration fly ash added into the concrete is selected according to the measured ammonia concentration, and therefore the environmental protection property and durability of the concrete are guaranteed.
Owner:SHAANXI HONGJI CONCRETE COMPONENT CO LTD +2

Gas measuring device and gas measuring method

To measure the temperature of sample gas, such as combustion gas in a combustion furnace or exhaust gas flowing in a flue without using a thermocouple, and accurately measure the concentration of a gas component included in the sample gas.SOLUTION: A gas measuring device comprises: a laser beam source that irradiates sample gas with a laser beam; a photo detector that detects the laser beam transmitted through the sample gas; a radiation thermometer in which a temperature measuring direction is provided along an optical path of the laser beam; and a signal processing unit that calculates the concentration of a gas component included in the sample gas on the basis of a light intensity signal obtained from the photo detector and a temperature signal obtained from the radiation thermometer.SELECTED DRAWING: Figure 1
Owner:HORIBA LTD

Segmented heating reaction kettle

The utility model provides a sectional heating reaction kettle which comprises a reaction kettle body, a stirring assembly is arranged in the reaction kettle body and used for stirring reaction raw materials in the reaction kettle body, a plurality of temperature control shells are arranged outside the reaction kettle body in the axial direction, and each temperature control shell can be filled with a heat-conducting medium. Each temperature control shell is communicated to the heat exchange unit through an independent loop, a thermometer and a liquid level meter are arranged on the reaction kettle, the thermometer is used for measuring the temperature of reaction raw materials in the reaction kettle, and the liquid level meter is used for measuring the liquid level height of the reaction raw materials in the reaction kettle. According to the sectional heating reaction kettle disclosed by the utility model, the heat exchange range of the temperature control shell can be adjusted according to the quantity of materials in the reaction kettle, so that the production cost is reduced.
Owner:ZHEJIANG JINGGONG SCI & TECH

Aluminum alloy cast rod deep well casting explosion-proof system and technology

The invention discloses an aluminum alloy cast rod deep well casting explosion-proof system and process, and the system comprises a mechanical leakage-proof mechanism comprising a telescopic rod and a plug block, a casting device comprising a casting disc, a crystallizer, a first-stage vertical shaft and a second-stage vertical shaft, and a nitrogen cooling leakage-proof mechanism comprising a plurality of layers of interception plates and a plurality of stages of liquid nitrogen nozzles which are arranged in the first-stage vertical shaft, the fool-proof mechanism comprises a filter plate and a thermometer; longitudinal and transverse casting disc runners communicated with the crystallizer on the casting disc have section shapes consistent with those of the corresponding plug blocks; the filter plate is partially located at the bottommost portion of the primary shaft and partially located at the topmost portion of the secondary shaft. For aluminum water leakage of an individual crystallizer, a plug block is used for mechanical leakage prevention. When the molten aluminum leaks from a plurality of crystallizers, mechanical leakage prevention and nitrogen cooling leakage prevention are manually and actively adopted, or a part of the molten aluminum is intercepted and solidified by the intercepting plate, and the molten aluminum is further solidified by the lowest fool-proof mechanism, so that the molten aluminum is prevented from being directly contacted with water in the second-stage vertical shaft to explode. And through three-stage explosion prevention, the life safety of operators is effectively guaranteed.
Owner:CITIC BOHAI ALUMINUM (CHUZHOU) CO LTD +1

Food thermometer and method of using thereof

A food thermometer includes a tip portion and an outer shell including a minimum food insertion depth indicator visible on an exterior of the outer shell. A thermal barrier member is located inside the outer shell along a center virtual axis defined by the outer shell at or adjacent a projected position of the minimum food insertion depth indicator on the virtual axis, or closer to the tip portion than the orthogonally projected position of the minimum food insertion depth indicator. In another aspect, a food thermometer includes a first portion and a second portion connected to the first portion. A third portion connected to the second portion includes an antenna. A thermal barrier member is located in at least one of the first portion and the second portion to thermally insulate the interior of the first portion from at least a portion of the interior of the second portion.
Owner:APPTION LABS LTD

SNCR intelligent denitration system based on sound sensing technology

The invention provides an SNCR (selective non-catalytic reduction) intelligent denitration system based on a sound sensing technology, and relates to the technical field of flue gas denitration. The hearth temperature calculation module sequentially sounds and receives the multiple sound wave signal flows, multiple hearth path temperatures are obtained through calculation and uploaded to the central processing unit through the temperature field reconstruction module, and a hearth combustion temperature field graph is generated through calculation; the denitration strategy control module is used for matching and analyzing a denitration strategy according to the hearth combustion temperature field graph and determining target denitration control strategy parameters; and the feedback optimization module adopts the parameters to execute denitration control operation, and regulates and updates target denitration control strategy parameters according to the denitration effect. The technical problem that SNCR denitration control is difficult to accurately match with the optimal reaction zone due to low temperature measurement means precision and insufficient spatial resolution in the prior art is solved, the SNCR denitration efficiency is improved, and ammonia escape is reduced.
Owner:XIONGAN GUOCHENG INTELLIGENT CONTROL TECHNOLOGY CO LTD

Condition control type moxibustion support and control method

The invention relates to the field of physiotherapy, in particular to a condition control type moxibustion support and a control method. According to the device, the output end of a valve system is connected to a pneumatic push rod, a first air inlet pipe and a second air inlet pipe, and a thermometer inserted into a shielding cylinder and located below a grid is arranged on a thermometer mounting position; according to the condition control type moxibustion support and the control method, the main height and the combustion state of a moxa stick and the secondary medicine mist guiding-out strength are controlled, and the sealing effect of the shielding cylinder provides a basis for airflow control of the first air inlet pipe and the second air inlet pipe; after a height signal of a moxa stick is obtained through a shielding sensor, adjustment is achieved through a pneumatic push rod, the height of the moxa stick is appropriate, and it is guaranteed that the infrared effect and the heat effect of a moxa stick burning point are correctly applied to the skin position; after the height is correctly set, the combustion state of a moxa stick combustion point can be adjusted according to the thermometer and through work adjustment of the second air inlet pipe.
Owner:CHENGDU MILITARY GENERAL HOSPITAL OF PLA

Conductivity sensor pressure compensation test system and method

The invention discloses a conductivity sensor pressure compensation test system and method, and relates to the field of sensor test. The conductivity sensor testing device comprises a pressure-resistant shell, a temperature sensor and an acquisition module, the standard pressure gauge is used for pressurizing the conductivity sensor and recording a standard pressure value; the seawater thermostatic bath is used for manufacturing a standard constant-temperature environment for the conductivity sensor; and the standard platinum resistance thermometer is placed in the seawater thermostatic bath and is used for measuring a standard temperature value. During testing, a corresponding standard conductivity value can be calculated according to the standard pressure value and the standard temperature value recorded at each temperature control point and the salinity value of standard seawater; the conductivity measurement values corresponding to all the temperature control points, the standard conductivity values and the standard pressure values are fitted, and the pressure compensation coefficient can be calculated. During measurement, the conductivity measurement value of the conductivity sensor is corrected by using the pressure compensation coefficient, so that the conductivity measurement precision can be improved.
Owner:STATE OCEAN TECH CENT

High-precision R-2R voltage type digital-to-analog converter based on binary weighting code and thermometer code

The invention discloses a high-precision R-2R voltage type digital-to-analog converter based on a binary weighted code and a thermometer code, the digital-to-analog converter comprises a weighted resistance network, a thermometer decoder circuit and an operational amplifier module with a self-calibration function, the output of the weighted resistance network is connected with the operational amplifier module with the self-calibration function, and the output of the thermometer decoder circuit is connected with the operational amplifier module with the self-calibration function. The output of the thermometer decoder circuit is connected with a thermometer code part of the weighted resistance network, an external clock CLK signal and a common-mode voltage serve as input signals of the operational amplifier module with the self-calibration function, and an output signal of the weighted resistance network passes through the operational amplifier module with the self-calibration function to obtain final analog voltage output. The resistance network adopts a mixture of thermometer codes and an R-2R structure, static indexes of the DAC can be effectively optimized, the impedance matching problem of the resistance network is reduced, a self-calibration operational amplifier technology is further applied, the influence of offset voltage of an operational amplifier on output precision can be eliminated, and the output driving capacity of the DAC is improved.
Owner:HARBIN INST OF TECH

Mercury sphygmomanometer reading identification method and automatic calibration device

PendingCN119919924ACharacter and pattern recognitionData setMercury sphygmomanometer
According to the mercury sphygmomanometer reading identification method and the automatic calibration device, image morphological processing is adopted, the mercury column convex liquid level can be accurately identified, and accurate positioning of liquid level scribed lines is achieved; the method has high universality, a network training data set is replaced in a mode of combining image morphological processing and a YOLOv5 target detection algorithm, and the method is applicable to industrial instruments or glass measuring tools with scales arranged in the vertical direction. The industrial camera is driven through the linear guide rail module, the shooting visual angle and the mercury column liquid level scribed line are kept in the same horizontal line, the method is also suitable for glass liquid measuring tools such as thermometers and mercury sphygmomanometers, reading errors caused by the fact that the visual angle is not flush with the liquid level are avoided, full-automatic verification of the sphygmomanometers can be achieved, and the detection efficiency is improved. Manual intervention is not needed in the process, an experiment report can be output according to verification regulations after verification is completed, the labor cost is reduced, and the verification efficiency is improved.
Owner:杭州市萧山区质量计量监测中心(杭州市萧山区农产品监测中心、杭州市萧山区药品和医疗器械审评检查服务中心)

Analyzing and detecting device suitable for organic amine in tail gas desulfurization process

The utility model relates to an organic amine analysis detection device suitable for a tail gas desulfurization process. The problem that a test bench for reliably testing the organic amine analysis process performance does not exist in an existing detection method is solved. Comprising a desorption device, an organic amine sample, a heater, a desorption solution thermometer, a gas pipe, a desorption tail gas treatment device, an acid gas absorption alkali liquor, a device seal and a thermal insulation material, the desorption device contains the organic amine sample after absorbing the acid gas, the desorption device is connected with the desorption tail gas treatment device through the gas pipe, and the desorption solution thermometer is arranged on the desorption device. The desorption device is wrapped with a thermal insulation material, the desorption tail gas treatment device contains sufficient acid gas absorption alkali liquor, a heater is arranged below the desorption device, and device seals are arranged on the desorption device and the desorption tail gas treatment device. The device has the advantages that materials are easy to obtain, the assembly is simple, the manufacturing cost is low, and the device can be well adapted to the existing amine liquid detection method.
Owner:NORIN MINING LTD

Seepage-heat transfer-chemical-stress test device for simulating high-level radioactive waste disposal and method of seepage-heat transfer-chemical-stress test device

The invention provides a test device and method for simulating seepage, heat transfer, chemistry and stress of high-level radioactive waste disposal, the test device comprises a test box body, a rock-soil body model is arranged in the test box body, the rock-soil body model is composed of sandstone and bentonite, and a heat source is arranged in the middle of the bentonite; a fracture network is arranged in the rock-soil body model, a thermometer, a water pressure gauge and a strain gauge are placed in the fracture network and are in signal connection with a data acquisition instrument, and the data acquisition instrument is in signal connection with a data processing computer; and the test box body is also connected with a fluid supply system. Through repeated model tests, quantitative and qualitative analysis can be carried out on the influence of heat source temperature, different-configuration fracture water seepage paths, fracture water seepage speeds, fracture water chemical properties and inter-fracture water seepage interaction on a rock-soil body model temperature field, a water pressure field and a displacement field; the method has important significance for improving safe disposal of high-level radioactive waste, and is economical and practical.
Owner:YANAN UNIV

Method and device for calculating boundary parameters of supercritical fluid heat exchanger, computer equipment and medium

The embodiment of the invention provides a calculation method and device for boundary parameters of a supercritical fluid heat exchanger, computer equipment and a medium, and relates to the technical field of fluid mechanics and heat transfer science calculation.The method comprises the following steps that design parameters and target working conditions of the heat exchanger are obtained; calculating to obtain the single section length of each infinitesimal section; based on the initial inlet pressure guess value, according to the length of the single section and the pressure and the temperature of the infinitesimal section i, the pressure and the temperature of the infinitesimal section i + 1 are obtained through calculation, the difference value between the outlet calculation pressure and the target outlet pressure is calculated, and the difference value serves as a pressure error; if the pressure error is greater than the convergence tolerance, updating the inlet pressure guess value by adopting a numerical iteration method, and performing iteration again based on the inlet pressure guess value after iteration; otherwise, iteration is terminated, and the final inlet pressure value and the final outlet temperature value are output. According to the scheme, the calculation efficiency and accuracy of solving the inlet pressure and the outlet temperature of the supercritical fluid heat exchanger under the given target outlet pressure are improved.
Owner:TAIHANG NATIONAL LABORATORY +1