320results about "Material moisture content" patented technology

The invention relates to the technical field of medium phase state determination, in particular to a PVT analyzer and method suitable for multi-component fluid medium phase state determination, and the PVT analyzer comprises a determination assembly, a test cylinder, a balance cylinder, a pressurization cylinder, a gas distribution pipeline, a first driving mechanism and a second driving mechanism. The structure is reasonable and compact, combination of gas with various components can be achieved through the multiple gas cylinders and the gas distribution pipeline, mixing of the gas according to the set ratio can be achieved by adjusting the gas distribution valve, the multiple gas cylinders can inject the gas into a rodless cavity of the pressurization air cylinder through the gas distribution valve and the gas distribution pipeline, and the gas injection efficiency is improved. The second driving mechanism drives the piston rod of the pressurizing air cylinder to continuously input gas in the rodless cavity of the pressurizing air cylinder into the rodless cavity of the balance air cylinder through the pressurizing pipeline and the one-way valve, so that the pressure of the rodless cavity of the balance air cylinder can be increased; and the precise gas distribution and gas pre-pressurization functions of multi-component gas can be realized.

The invention discloses a micro-water density monitoring method and system based on multi-sensor fusion compensation, and relates to the field of power equipment safety. According to the micro-water density monitoring method based on multi-sensor fusion compensation, parameters are collected in real time through a micro-water collector composed of a ceramic heater, a humidity-sensitive capacitor collection sheet, a dew point sensor, a pressure sensor and a temperature sensor; a signal conditioning circuit and an analog-to-digital conversion module are integrated by adopting a four-layer PCB (Printed Circuit Board), and the micro-water collector is heated for multiple times by a main controller; carrying out digital filtering processing, cross validation operation and operation of eliminating influence of environment temperature on the acquired parameters; the measurement precision is improved through a sensor self-calibration mechanism, finally standardized micro-water density data are output, and an early warning function is triggered based on a multi-level threshold value. According to the invention, the problems of low precision and poor reliability of the measured micro-water density in the prior art are solved. Therefore, the accuracy of micro-water density measurement under complex working conditions is effectively improved, and data support is provided for predictive maintenance of intelligent equipment.

The invention discloses a saturated seepage zone and unsaturated moisture zone identification method based on an active heating optical fiber, and the method comprises the steps: carrying out the thermal response test of a to-be-tested soil body through the power supply of an AH-UWFBG optical cable, and obtaining a response curve of a temperature rise value [delta] T of the to-be-tested soil body along with time t; the AH-UWFBG optical cable is placed in the saturated soil body, and the temperature rising value delta Tsat of the saturated soil body and the time t0 when the slope of a delta T-lnt curve of the saturated soil body reaches the stable state are measured; judging a boundary line of a saturated seepage zone and an unsaturated water zone in the to-be-detected soil body by judging the slope of the delta T-lnt curve and the size relationship between delta T and delta Tsat, and calculating the water content under the condition of no seepage and the seepage speed under the condition of seepage; the invention provides a new method for monitoring the hydrological process, and more accurate and comprehensive soil moisture and seepage data can be provided for the fields of environmental science, water resource management, agricultural production and the like.

The invention provides a power supply strategy optimization method for condensation control and a ring main unit, and belongs to the technical field of power supply, and the method specifically comprises the steps: determining the coincidence probability of the ring main unit and humidity intervals of different fluctuation types in a future preset time period according to the humidity monitoring data of the ring main unit, when the coincidence probability is utilized to determine that the distribution data of the coincidence risk time period in the future preset time period meets the requirement, the temperature change condition of the ring main unit under the weather data of the current date is taken as the basis, and the temperature change condition of the ring main unit is determined on the basis of the coincidence probability of the coincidence risk time period and humidity intervals of different fluctuation types; according to the method, the adjustment demand type of the humidity adjustment device of the ring main unit is determined, and the power supply processing strategy of the temperature adjustment device of the photovoltaic device at different monitoring temperatures is determined by using the adjustment demand type and the humidity monitoring data, so that the reliability of the control processing of the condensation risk is improved, and the use of the commercial power is reduced.

The invention discloses an SF6 density and micro-water comprehensive verification device and a control method thereof. The SF6 density and micro-water comprehensive verification device comprises a micro-water detection unit, a purity detection unit, a density verification unit, a gas path system, a multi-parameter synchronous acquisition module and a control module. The micro-water detection unit is connected in series with a constant flow valve; the purity detection unit comprises an infrared detection cavity, and a constant-temperature heating sheet wraps the outer side of the infrared detection cavity and is used for stabilizing the temperature in the cavity; the density checking unit is connected in series with a precise pressure regulating valve for realizing dynamic pressure regulation; the gas path system comprises a main gas path, a density calibration sub-gas path, a micro-water detection sub-gas path and a purity detection sub-gas path; the multi-parameter synchronous acquisition module is used for synchronously acquiring environment temperature, gas path pressure and environment humidity data in the device; the control module is internally provided with sequential control logic and is used for controlling the electromagnetic switching valve to sequentially conduct the density calibration sub-gas circuit, the micro-water detection sub-gas circuit and the purity detection sub-gas circuit and controlling the main gas circuit to be vacuumized and then filled with nitrogen to form positive pressure isolation when the sub-gas circuits are switched; and meanwhile, a temperature, pressure and humidity coupling compensation algorithm is executed based on data of the multi-parameter synchronous acquisition module. According to the device, micro-water, purity and density detection of the SF6 gas is realized through one device, and the detection accuracy is high.

The invention relates to a potato leaf disease area positioning method, system and device.The method is applied to the potato leaf disease area positioning device.The method comprises the steps that a target infrared image of a potato leaf is segmented into a normal area and an abnormal area according to the environment temperature through a disease segmentation model obtained in advance; determining the water content of the target infrared image according to the leaf spectrum information through a pre-obtained water content prediction model; the leaf emissivity characteristic is calculated according to the water content through a pre-obtained temperature correction model, the temperature of the abnormal area is corrected based on the emissivity characteristic and the water content characteristic, and the temperature correction model is obtained based on potato leaf characteristic training; and through a pre-trained disease identification model, identifying a disease area from the abnormal area after temperature correction.

The invention discloses a real-time monitoring data control method for adsorption separation and an adsorption separation device, and relates to the technical field of adsorption and analysis regulation and control. The method comprises the following steps: setting a first cleanliness threshold value of finished gas and a second cleanliness threshold value of desorption gas; according to the current state of the first cleanliness and the current state of the second cleanliness, the regeneration medium flow of the analysis process is dynamically adjusted; or when the first cleanliness reaches the first cleanliness threshold value and the second cleanliness reaches the second cleanliness threshold value, the current adsorption process is ended, and the working mode is switched; if the second cleanliness does not reach the threshold value, the regeneration medium flow is increased until the switching condition is met. Saturation regulation is carried out by monitoring the dual states of the finished gas and the desorption gas in real time, actual working condition fluctuation can be responded in a self-adaptive mode, the quality stability of the finished gas is guaranteed, meanwhile, the problem that regeneration is insufficient or regeneration media are excessively consumed is solved, and operation energy consumption is remarkably reduced.

The invention discloses a solid waste water content prediction system and method based on an infrared thermal imager. The temperature field of the solid waste on the conveyor belt in the natural convection and forced convection moisture evaporation process is monitored and compared in real time through the thermal infrared imager, and the moisture content of the solid waste can be accurately predicted in combination with data processing, environmental parameter correction and prediction of a regression equation. Compared with a traditional sampling detection method, the method has the advantages of being high in real-time performance, non-contact, simple in equipment, good in economical efficiency and the like, can adapt to a complex industrial field environment, and provides a new technical means for intelligent and refined control over waste incineration. The system is simple in structure, high in reliability, good in detection precision and capable of achieving real-time prediction of the water content of the solid waste entering the furnace.

The invention relates to the technical field of pour point and condensation point measurement, in particular to a pour point and condensation point precise measurement method, system and equipment. The method comprises the following steps of: determining a condensation tendency index according to a temperature data sequence fluctuation characteristic, a humidity data sequence change trend and a coupling difference characteristic between temperature and humidity data sequences; a control redundancy index is determined according to the continuous working time of the fan, the condensation tendency index and the numerical deviation characteristics between the power and humidity data sequences; according to the instantaneous change characteristics of adjacent data points in the humidity data sequence, the temperature data sequence and the power data sequence of the current time window, determining a collaborative benefit index; determining a comprehensive evaluation score according to the collaborative benefit index and the control redundancy index; controlling the fan to execute a corresponding operation strategy according to the comprehensive evaluation score and a preset mapping relation between the score and the operation strategy; the operation strategy is repeatedly adjusted until the pour point and the condensation point of the sample are determined, and therefore the fan power responds to environment changes in real time.

A testing device for measuring oil, gas and water contents in rock has a heating desorption unit that has a sample chamber for placing a rock sample to be detected, a crushing mechanism arranged within the sample chamber, and a heating mechanism. The heating desorption unit crushes and heats the rock sample in a sealed manner to achieve gas analysis and desorption analysis of oil and water contained therein, thus obtaining components to be detected. The device further has a cold trap collection unit in communication with the sample chamber, a light hydrocarbon capture unit in communication with the cold trap collection unit, a gas measuring unit in communication with the light hydrocarbon capture unit for measuring and calculating a gas volume; and a central control unit for controlling the testing device.

The present invention relates to a measuring device and a method for determining and outputting the dew point temperature. A first humidity sensor unit (10; 110; 210) is configured for determining at least one dew point correction parameter and comprises a first humidity sensor (11), a first temperature sensor (12), and a temperature change element (13). A second humidity sensor unit (20; 120; 220) is configured for continuously determining the dew point temperature and comprises a second humidity sensor (21) and a second temperature sensor (22).By means of a control unit (30) the temperature of the first humidity sensor unit (10; 110; 210) is changed via the temperature change element (13) and a dew point correction parameter is determined; furthermore, the dew point correction parameter from the first humidity sensor unit (10; 110; 210) is used to correct measured values ​​of the second humidity sensor unit (20; 120; 220) and to continuously output corrected dew point temperatures based on the corrected measured values.

The invention discloses an anti-condensation method for a closed cavity with a ventilation valve, and the method comprises the following steps: setting a plurality of measurement points in the closed cavity to obtain a moisture diffusion coefficient of each measurement point in the closed cavity, and fitting to obtain an influence function of temperature, humidity and a humidity adjusting material on the moisture diffusion coefficient; according to the moisture diffusion coefficient and each influence function, constructing a simulation model to simulate the distribution of moisture in the closed cavity; acquiring internal temperature and humidity and external environment information of the closed cavity; obtaining condensation conditions according to the internal temperature, humidity and external environment information of the closed cavity in combination with a moisture diffusion coefficient; and according to the moisture distribution and condensation conditions in combination with the simulation model, obtaining the use amount and position distribution of the anti-condensation humidity adjusting material. Condensation prevention of the closed cavity with the ventilation valve is achieved.

The invention discloses a water content detection method and device in an extract drying process and a storage medium, and belongs to the field of extract production. Aiming at the problem of low detection accuracy of the water content of the current extract, the detection method comprises the following steps: firstly, acquiring text information including temperature, heating time and other information, a thermodynamic diagram and an RGB (Red, Green and Blue) image from an extract drying system; cleaning the text information, and extracting numerical feature data to generate a first embedded vector; generating a pseudo-color graph according to the thermodynamic diagram to obtain a second embedded vector; and extracting a high-dimensional feature vector of the RGB image by using the pre-trained visual model. And splicing the three vectors into a unified input sequence, adding position codes to obtain a second embedded vector, carrying out coding fusion on the multi-modal features through a Transform encoder, inputting the multi-modal features into a fine-tuning trained large language model, and outputting the water content of the extract. The water content detection accuracy in the extract drying process is effectively improved.

The invention discloses an inert gas dynamic monitoring control system for metal powder preparation, belongs to the technical field of inert gas monitoring, and solves the problems of signal drift caused by nano-particle adsorption and detection result drift or distortion caused by oxygen release of oxide particles. Comprising a parameter set operation module, an information output module in communication connection with the output end of the parameter set operation module, and a core detection module, a nano-particle detection module, an environment detection module and an auxiliary detection module which are in communication connection with the input end of the parameter set operation module, the core detection module collects the oxygen concentration and the moisture dew point. According to the system disclosed by the invention, all detection modules are used for acquiring data, and methods of multi-dimensional processing, real-time tracking, correction and the like are adopted, so that full-chain fine processing is realized, the problems of nano-particle adsorption and oxide oxygen release are effectively solved, a high-precision correction scheme is provided, the calibration period is prolonged, and drift or distortion of a detection result is slowed down.

The invention discloses a dew-point meter measurement data processing method and equipment, relates to the technical field of industrial automatic measurement and control and fault diagnosis, and aims to construct a dynamic sensing window with a variable form to preprocess dew-point meter time sequence data, calculate fault probability entropy in real time and detect instantaneous abnormality. And a window form is decided in combination with the fault-window form mapping library, and adaptive switching is carried out to obtain an anomaly recognition result. And selecting a corresponding algorithm from the correction strategy library to correct the abnormity. According to the method, a dynamic sensing window with a variable form is constructed, and adaptive switching among panoramic, sniping and multi-focus forms is realized by taking the fault probability entropy calculated in real time as a drive. By means of a built-in fault-window form mapping library, abnormal symptoms and fault physical mechanisms are associated, multiple concurrent faults are separated, root causes are deduced, and decision space explosion is avoided. And on the basis of a diagnosis result, a correction strategy library targeted algorithm is called to correct abnormity, and an identification-diagnosis-correction intelligent closed loop is formed.

The invention relates to the technical field of power equipment, in particular to a switch cabinet condensation processing device and a switch cabinet condensation processing method.The switch cabinet condensation processing device comprises humidity detection equipment and dehumidification equipment, the humidity detection equipment comprises a detection probe and a central processing unit, and the detection probe comprises a humidity sensor; the detection probe is arranged at a detection site in the switch cabinet, and the central processor is in signal connection with the humidity sensor; the dehumidification equipment is in signal connection with the central processor; the detection sites are positioned on a circuit breaker chamber upper contact box, a circuit breaker chamber A-phase lower contact box, a circuit breaker chamber C-phase lower contact box, a circuit breaker chamber right side plate contact box, a circuit breaker chamber left side plate contact box, a cable chamber right side plate cable bridge, a cable chamber left side plate cable bridge and a cable chamber right side plate contact box of the switch cabinet; the cable chamber is arranged on the peripheral side of at least one of the contact boxes on the left side plate. The dehumidification equipment is in signal connection with the central processing unit, so that the dehumidification equipment can be controlled to start and stop according to the humidity of the detection site.

There is provided a composition for topical application to the penis for the treatment of erectile dysfunction, the composition being free of glyceryl trinitrate (GTN), sildenafil and an acetylcholinesterase inhibitor, and comprising volatile and non-volatile solvents, the volatile solvents comprising a lower alcohol and water and the non-volatile solvents comprising a polyhydric alcohol and a glycol. Preferably, the composition does not contain any pharmaceutically active ingredients for the treatment of erectile dysfunction. Also provided is a method of determining the cooling ability of a test composition, such as the composition described above.

This invention discloses a method and device for processing dew point meter measurement data, relating to the fields of industrial automation measurement and control and fault diagnosis technology. It constructs a dynamically sensing window with variable shape to preprocess time-series data from the dew point meter, calculates fault probability entropy in real time, detects instantaneous anomalies, and combines a fault-window shape mapping library to determine the window shape and adaptively switch it to obtain anomaly identification results. A corresponding algorithm is selected from a correction strategy library to correct the anomaly. This invention constructs a dynamically sensing window with variable shape, driven by real-time calculated fault probability entropy, enabling adaptive switching between panoramic, sniper, and multi-focus shapes. Utilizing a built-in fault-window shape mapping library, it associates anomaly symptoms with fault physical mechanisms, separates multiple concurrent faults, infers root causes, and avoids decision space explosion. Based on the diagnostic results, it calls targeted algorithms from the correction strategy library to correct anomalies, forming an intelligent closed loop of identification-diagnosis-correction.

The problem to be overcome by the present disclosure is to more accurately measure the water vapor pressure of gas mixtures even when the gas mixtures flow through a flow channel under a high-humidity environment. A physical quantity measurement system (1) includes a temperature and humidity sensor (16), a heat generator (17), a heat generation controller (203), and a water vapor pressure measurer (204). The temperature and humidity sensor (16) measures a humidity and temperature of gas mixtures flowing through a flow channel (101). The heat generator (17) performs a heat generating operation that generates heat to warm the temperature and humidity sensor (16). The heat generation controller (203) controls the heat generating operation. The water vapor pressure measurer (204) measures a water vapor pressure of water vapor included in the gas mixtures. The heat generation controller (203) controls the heat generating operation by the heat generator (17) based on a result of comparison between a humidity measured value of the gas mixtures that has been measured by the temperature and humidity sensor (16) and a threshold value. The water vapor pressure measurer (204) calculates the water vapor pressure by changing a measurement method depending on a condition satisfied based on the humidity measured value.

The problem to be overcome by the present disclosure is to more accurately measure the water vapor pressure of gas mixtures even when the gas mixtures flow through a flow channel under a high-humidity environment. A physical quantity measurement system (1) includes a temperature and humidity sensor (16), a heat generator (17), a heat generation controller (203), and a water vapor pressure measurer (204). The temperature and humidity sensor (16) measures a humidity and temperature of gas mixtures flowing through a flow channel (101). The heat generator (17) performs a heat generating operation that generates heat to warm the temperature and humidity sensor (16). The heat generation controller (203) controls the heat generating operation. The water vapor pressure measurer (204) measures a water vapor pressure of water vapor included in the gas mixtures. The heat generation controller (203) controls the heat generating operation by the heat generator (17) based on a result of comparison between a humidity measured value of the gas mixtures that has been measured by the temperature and humidity sensor (16) and a threshold value. The water vapor pressure measurer (204) calculates the water vapor pressure by changing a measurement method depending on a condition satisfied based on the humidity measured value.

The present application relates to a tobacco loose detection equipment technical field, especially to a kind of tobacco loose after moisture processing degree of detection device of stretching degree.Its technical scheme includes the detection device of checking tobacco, also includes: setting in the detection device in order in turn material taking conveying line, material distributing vibration disc, material conveying line, detection square cover and return material conveying line.The present application is by material taking conveying line, material distributing vibration disc, material conveying line, detection square cover, return material conveying line and industrial camera etc.Structure design, by image recognition technology to the light transmission of tobacco is analyzed, the stretching degree of tobacco is converted into the quantization index of gray value area area ratio, solve the problem of strong subjectivity and poor consistency caused by relying on artificial sense of smell in prior art evaluation.At the same time, it also realizes the automatic extraction, dispersion, image acquisition and material recovery of tobacco sample.The whole detection process does not need manual intervention, significantly improves the detection efficiency.

The present invention relates to a nitrogen oxide sensor fault diagnosis method, device, electronic device, and medium, belonging to the field of automotive technology. The method comprises: obtaining a target nitrogen oxide sensor's transition time from a lean oxygen mode to a rich oxygen mode, and obtaining the number of times the target nitrogen oxide sensor transitions from the lean oxygen mode to the rich oxygen mode, upon determining that the target nitrogen oxide sensor exceeds a dew point, determining that the target nitrogen oxide sensor's oxygen concentration is enabled, determining that the engine is in a normal combustion mode, and determining that the engine exhaust flow rate is greater than a first threshold; and determining whether the target nitrogen oxide sensor is faulty based on the transition time and the number of times the target nitrogen oxide sensor transitions from the lean oxygen mode to the rich oxygen mode. The present invention defines an operating condition suitable for sensor diagnosis, and when the engine enters this operating condition, performs nitrogen oxide sensor fault diagnosis based on the minimum transition time from the lean oxygen mode to the rich oxygen mode, thereby improving the accuracy of nitrogen oxide sensor fault diagnosis.

The invention relates to the technical field of fuel cell membrane humidifiers, and particularly discloses a fuel cell membrane humidifier humidity testing device, which comprises a base in which a gas channel is arranged; the top cover is sequentially provided with a first probe insertion hole, a second probe insertion hole and a wet bulb gauze lead hole, the first probe insertion hole and the second probe insertion hole are both communicated with the gas channel, a communication groove is communicated between the wet bulb gauze lead hole and the second probe insertion hole, and the top cover is in sealed connection with the base; a ball head of the dry bulb hygrometer is inserted into the first probe insertion hole; a bulb of the wet bulb hygrometer is inserted into the second probe insertion hole; one end of the gauze is sleeved on a bulb of the wet bulb hygrometer, and the other end of the gauze is communicated to the outside of the top cover after sequentially passing through the communicating groove and the wet bulb gauze lead hole. The device can be used for rapidly testing the dry and wet conditions of the gas at the proton exchange membrane of the fuel cell membrane humidifier, and is simple in structure, short in response time and high in precision.

A test apparatus comprising including a housing with an interior forming a watertight main measuring chamber for housing a bar, a framework structure supporting the housing, a sample holder in the main chamber, and an air-conditioning system. The apparatus includes a humidifying system, a thermal regulation system, and a humidified air recirculation system. The sample holder has two lower support elements for supporting two end parts of the sample bar, respectively, corresponding to the unsealed end face of the sample bar. Two suspension arms are each hinged at its lower end to one of the lower support elements, the first arm hinged to an upper part of the framework structure, and the second arm hinged to be connected to a force gauge in the main chamber, the support elements suspended on the suspension arms to keep the sample bar axially suspended in a horizontal plane without causing axial stresses in the bar.

The invention belongs to the field of battery box pressure monitoring, and particularly relates to a battery box pressure monitoring and condensation risk monitoring method and system. Comprising the steps that the difference between the air pressure value of the internal environment of the battery box and the air pressure value of the external environment of the battery box obtained by the same battery box at the same moment is obtained, and the difference obtained through difference serves as the pressure in the battery box of the battery box; if the condition that the pressure in the battery box is larger than the set air pressure threshold value is met, it is judged that the pressure in the battery box is abnormal; the air pressure threshold is set to be greater than 0. The method can ensure that the mechanical structure of the battery box is complete (that is, solid and liquid impurities in the external environment can be prevented from invading and damaging the battery in the box), and the effect of accurately and reliably monitoring the internal pressure of the battery box is realized as much as possible under the conditions that the battery box is not perforated and the protection level of the battery box is not influenced.

The invention discloses a tobacco shred moisture detection method and system based on a thermal analysis infrared combined method, and relates to the technical field of tobacco detection.The method comprises the steps that under the set gradient temperature rise test condition, a tobacco shred sample is tested through the thermal analysis infrared combined method, and a test curve is obtained; according to the test curve, determining heat release substances and heat absorption and release conditions in different temperature intervals, and determining a gradient temperature rise scheme according to the heat release substances and the heat absorption and release conditions; determining moisture contents and microstructure diagrams of the tobacco shred samples under different gradient heating schemes, comparing the moisture contents of the tobacco shred samples with standard moisture contents, judging whether national standard errors are met or not, and evaluating the quality of the dried tobacco shreds on the microstructure diagrams, so as to optimize the gradient heating schemes; and under the optimized gradient heating scheme, detecting the to-be-detected tobacco shreds to obtain the moisture content. The tobacco shred moisture detection efficiency is improved, the detection precision is ensured, and meanwhile, the tobacco shred drying quality can be controlled through auxiliary analysis based on the microstructure chart.

The invention discloses a high-precision anti-interference chilled mirror dew point measuring device and method based on semiconductor refrigeration, and relates to the technical field of atmospheric environment monitoring and precise instrument manufacturing. The device mainly comprises an optical measurement module, a temperature measurement module and a control processing unit. According to the method, the mirror surface is cooled through the semiconductor cooler, and the control processing unit integrates a self-adaptive PID algorithm to dynamically adjust the refrigeration power. Light emitted by the collimated light source is reflected by the reflective mirror surface and then received by the reflective photoelectric sensor, and the reflected light intensity is dynamically compensated based on a reference light signal through the change of reflectivity so as to eliminate common-mode interference. The measurement method comprises the following steps of: initializing and recording multiple paths of optical signal baselines; step cooling of the mirror surface is controlled, and synchronous monitoring is performed; the optical signal is calculated and processed in real time, and dew formation starting is judged based on a dynamic threshold value; pID control is switched to enable the temperature to be finely balanced near the dew point, and a stable value is recorded; correcting and outputting a final dew point value by utilizing the compensation model; refrigeration is stopped, the mirror surface is evaporated and reset through waste heat, and the next circulation is started.

The invention provides a method for drying a double-valve-seat electromagnetic valve after a liquid flow test. Comprising the steps of performing an engine liquid flow test; carrying out alcohol replacement washing; blowing off nitrogen; carrying out alcohol replacement washing again; carrying out nitrogen purging again; performing vacuum drying; carrying out nitrogen fluctuation blowdown; dew point testing; and confirming a dew point test result and taking measures. Through two-round interval alcohol replacement flushing and nitrogen blowing, interval time control, electromagnetic valve closing time and operation pressure during alcohol replacement flushing and nitrogen blowing, vacuum drying in a valve opening state, and cooperation with periodic power-on valve opening operation, an inner cavity of an electromagnetic valve is communicated with an external vacuum environment, low voltage is kept in the valve opening process, and the vacuum drying effect is improved. After vacuum drying, nitrogen is blown down for multiple times by fluctuating pressure, the dew point is tested, the dryness of the inner cavity is verified in a closed loop mode, and the problem that residual water is difficult to thoroughly remove after a liquid flow test is conducted on the double-valve-seat electromagnetic valve in an engine state is solved.

Embodiments of the present invention provide a frost point hygrometer apparatus utilizing dry ice and ethanol, or liquid nitrogen, as cryogenic coolant. FPH apparatus in accordance with embodiments of the present invention includes a copper cold finger with a sink immersed in a liquid cryogen to provide cooling power throughout the profile, a polished mirror disk residing at the opposite end of the cold finger with ambient air passing over it, a nichrome heater wrapped around the narrow shaft of the continuous cold finger and mirror piece to provide heat to the mirror, an optical source and detector, including an infrared light-emitting diode and a photodiode, to monitor the mirror's reflectivity as condensate accumulates in the form of dew or frost, a biconvex lens to focus the light reflected from the mirror into the photodiode, and a calibrated thermistor embedded in the mirror to measure the frost point temperature.

The invention discloses a 1E-grade hygrograph for a high-temperature gas cooled reactor and a calibration method. The calibration method comprises the steps that one end of a humidity sensor is connected with a glass sealing through joint, and the other end of the humidity sensor is in contact with helium; the transmitting circuit is connected with one end, far away from the humidity sensor, of the glass sealing penetrating joint, and the transmitting circuit is connected with the humidity sensor through a conductor in the glass sealing penetrating joint; one end of the top plate circuit is welded with the transmitting circuit, and the other end of the top plate circuit is welded with the signal connector; the first O-shaped sealing ring is mounted in a sealing groove of the glass sealing penetrating joint; the metal protective cover is installed at one end of the glass sealing penetrating connector. The metal shell is installed at the other end of the glass sealing penetrating connector. The screw rod is fixed on the glass sealing through joint, and the screw rod is matched with the screw to connect and fix the metal shell and the glass sealing through joint. The invention belongs to the field of hygrometers. The hygrometer provided by the invention is compact in overall structure, safe and reliable.