31results about How to "Advantages of detection method" patented technology

The invention relates to an electric secondary AC circuit detection method which comprises the following steps: before a power plant machine set is started, a low-voltage short-circuit point or a short-circuit bogie is input; three-phase 380 V voltage is added at the high-voltage side of a booster station to form a circuit by means of the impedance of a transformer and a generator; current amplitude and phase are measured through a current detecting apparatus to check polarity and transformation ratio in advance; all current protective directions such as generator differential motion are measured. When a neutral point is not connected, a short-circuit point is made at a high plant transformer low-voltage side, and the three-phase 380 V voltage is added at the neutral point of the generator, thereby realizing overall checkup of a generator AC circuit; then, the three-phase 380 V voltage is converted into one-phase voltage or two-phase voltage to carry out overall checkup of a zero sequence circuit. The detection method can check all CT and PT circuits of a generation-transformer group before power transmission; moreover, all protection directions of the generation-transformer group are checked in advance, thereby saving time and fuel oil along with economical efficiency, environmental protection and safety. The electric secondary AC circuit detection method can check secondary circuits such as the transformer and the bus differential protection of a transformer substation.

The invention discloses an ultraviolet partial discharge on-line monitoring system based on photon-type positioning. The system comprises a data collecting terminal, a wireless communication base station and a background analyzing system. The data collecting terminal comprises a photon-type positioning ultraviolet detector, a temperature and humidity sensor, a wind speed sensor and a wind direction sensor, wherein the photon-type positioning ultraviolet detector, the temperature and humidity sensor, the wind speed sensor and the wind direction sensor are connected with a central data processing unit. The central data processing unit is in wireless connection with the background analyzing system. The photon-type positioning ultraviolet detector, the temperature and humidity sensor, the wind speed sensor and the wind direction sensor output collected information of the ultraviolet photon number, temperature, humidity, wind speed and the wind direction produced by corona discharge of electric transmission and transformation equipment to the central data processing unit, the central data processing unit packs the information in a unified mode and transmits the information to the background analyzing system, and the background analyzing system carries out analyses and judgments according to the information and accurately finds partial discharge and fault defects of the electric transmission and transformation equipment. The ultraviolet partial discharge on-line monitoring system based on the photon-type positioning has the advantages of being reasonable in structure and convenient to use.

The invention discloses a method for detecting the depth of an etched groove through the current change. A special detection region is designed, so that the depth of the etched groove is reflected in real time. The detection region is prepared through the MEMS processing technique and signals are read through a current meter. According to the method, a function region and the detection region are well isolated electrically through an SOI silicon wafer and the MEMS processing technique and the function region is prevented from being damaged through detection current. Meanwhile, through pattern transfer, etched windows of the function region are copied in the detection region and it is guaranteed that the etching conditions of the detection region tend to be identical to those of the function region. Strict electricity modeling calculation is conducted on the deep groove structure of the detection region, the relation between the etching depth and current signals is acquired, and on the basis, the depth of the etched groove is monitored in real time through detection of the current meter.

The invention provides a method for detecting air conditioner refrigerant leakage and an air conditioner. The method comprises the following steps: S1, detecting the fault condition of a compressor before the air conditioner is started; and if the compressor operates normally, executing the step S2; S2, starting the air conditioner to operate, and judging refrigerant leakage conditions in advancethrough refrigerant pressure; and if the pre-judgment result is to be determined, executing the step S3; and S3, calculating the refrigerant remain and further judging the refrigerant leakage conditions. The method for detecting the air conditioner refrigerant leakage and the air conditioner have the advantages of high detection precision and low misjudgment rate.

The invention provides a detection method for refrigerant leakage and an air conditioner with refrigerant. The detection method comprises the following steps that ST1, the air conditioner is started,initial detection is carried out on the refrigerant leakage, and whether a compressor can be started normally or not is judged; ST2, whether the compressor can run normally or not is judged; ST3, whether a preset triggering condition of refrigerant leakage detecting is met or not is judged; and ST4, whether the refrigerant leaks or not is judged according to the triggering condition of the refrigerant leakage; and ST5, refrigerant leakage protection operation is carried out. According to the detection method for the refrigerant leakage, whether the compressor can be started or not is detectedand judged, whether the compressor is normal or not is detected and judged, the waste of resources and the complexity of procedures are avoided, it is guaranteed that detection data when the refrigerant leakage is detected subsequently are true and reliable, and the probability of misjudgment can be greatly reduced through adopting multi-factor trigger, and then the refrigerant leakage detection procedures based on the triggerring condition.

The invention relates to the technical field of vehicle detection, and particularly relates to a vehicle detection method based on partial models. The method comprises the steps of taking two parts of a vehicle object according to the easily covering degree so as to form vehicle models; respectively setting a model for the two parts by hybrid image templates with multiple characteristics; studying the hybrid image templates corresponding to the two parts and the image likelihood probability of the templates by virtue of a training image, and simultaneously studying the probability distribution of the position and scale relationship of the two parts; detecting the candidate of the two parts in a tested traffic image, and combining the vehicle candidate by virtue of the position and scale relationship of the two parts so as to realize vehicle detection. The vehicle detection method has the advantages of being adaptable to moderate vehicle transformation and multiple weather conditions, and can be used for processing vehicle covering in a complex traffic scene.

The invention provides an air conditioner refrigerant leakage detection method and an air conditioner. A refrigerant loop is involved in the air conditioner refrigerant leakage detection method, a detectable additive is added in the refrigerant loop, a detection device is arranged outside the refrigerant loop, the detection device is used for detecting the concentration of the part, outside the refrigerant loop, of the additive in the refrigerant loop and feeding the concentration back to a controller, and the controller runs the corresponding control program according to a detection result and the pre-storage relationship. According to the air conditioner refrigerant leakage detection method, the situation that when a refrigerant is leaked, a compressor with leakage situation is directlystarted during starting of the air conditioner, and then further damage is caused to the air conditioner is avoided, then the detection deviation caused by other external factors is avoided, a multi-stage different-state same-element difference value comparison method is adopted, meanwhile, the detection factors are corrected, so that misjudgment is reduced, the accuracy of refrigerant leakage detection is improved, and the comfort of the user experience is improved.

The invention provides a conduction control table automatic generation instrument based on a Hall signal and a detection method thereof. A display screen and a key control module of the instrument are connected with a main control chip module; a Hall element is connected with the main control chip module; a three-phase port module is connected with the main control chip module through a voltage sensor circuit and a filter circuit; and a power module is connected with the display screen, the main control chip module and the Hall element. The detection method comprises the following steps: 1) starting the instrument after connecting each interface of the instrument; 2) reading signals of a voltage Hall position sensor; 3) reading a voltage polarity signal output by the voltage sensor circuit through the main control chip module; 4) judging whether judgment of a three-phase conduction mode is finished; 5) outputting Hall truth table statements; 6) judging whether six different Hall states are detected; and 7) ending the measurement process, the instrument jumping to an end state and keeping screen output. A conduction control Hall truth table is generated based on the input signal of the Hall element and line voltage input signal.

The invention discloses a contact lens edge defect detection method. The detection method comprises the following steps: collecting a two-dimensional image of a contact lens; preprocessing the two-dimensional image; performing transverse and longitudinal projection on the preprocessed two-dimensional image to obtain a one-dimensional signal; performing second-order derivation on the one-dimensional signal to obtain edge geometric parameters of the contact lens; performing space polar coordinate transformation by utilizing the edge geometric parameters; extracting an edge line according to thepolar coordinates; and extracting characteristic parameters of the extracted edge lines, and if the characteristic parameters exceed a preset threshold value, judging that the edges of the contact lenses have defects. The circle center and the radius of the corneal contact lens are obtained in a short time through derivation after transverse and longitudinal pixels in the image are accumulated, the contour of the circular image is extracted on the basis, tiny defect information can be prevented from being lost, and compared with the prior art, the calculation speed is high, and defect judgmentis accurate.

The invention discloses a method for detecting the content of chromium in copper alloy. The method comprises the following steps: 1, dissolving: weighing a certain mass of a copper alloy sample, and adding a nitric acid sample to dissolve the copper alloy sample; 2, completely dissolving: adding the processed copper alloy sample obtained in step 1 to a sulfur-phosphorus mixture acid containing analytically pure sulfuric acid and analytically pure phosphoric acid to completely dissolve the copper alloy sample in order to obtain a clarified solution; 3, reaching a constant volume: transferring the clarified solution obtained in step 2 to a volumetric flask, and allowing the volume of the clarified solution to reach a constant volume in order to obtain a solution to be detected; and 4, detecting and analyzing: detecting the content of chromium in the solution to be detected through an inductively coupled plasma atomic emission spectrometer. The nitric acid solution and the sulfur-phosphorus mixture acid are used to process the copper alloy sample in order to completely dissolve the sample, so the method has the advantages of substantial improvement of the accuracy of a detection result, small error and high applicability.

The invention discloses a harmonic current detection method applied to a stationary coordinate system of an APF (Active Power Filter), and belongs to the technical field of harmonic detection and treatment. In order to improve the accuracy of harmonic detection and the flexibility of harmonic compensation, the invention provides a complex bandpass filter with a phase advance correction function, and provides a design method and an execution process of the filter in detail; the harmonic current detection method disclosed by the invention does not need a phase-locked loop, a rotating coordinatetransformation or an inverse transformation, can be directly executed in the stationary coordinate system, is simple in principle and easy to implement, and can realize accurate detection of a specified phase sequence and a specified subharmonic.

The BTM library inspection system comprises a trackside processing center, a receiving unit, a locomotive identification unit, a BTM detection server and a data terminal. The receiving unit and the locomotive identification unit are connected to the trackside processing center and transmit the obtained data to the trackside processing center; The trackside processing center realizes communicationwith the BTM detection server and sends measured data to the BTM detection server, and the BTM detection server analyzes and judges the data and pushes a result to the data terminal; The receiving unit comprises a receiving antenna used for testing environmental noise and receiving radio frequency signals of the BTM antenna, and when a train passes through the receiving unit, testing of energy andfrequency of the BTM antenna and measurement of the environmental interference degree of the train are completed. The BTM library inspection system has the following technical effects that the BTM antenna test and the locomotive electromagnetic environment noise test are realized through the BTM library inspection system, the BTM equipment state is analyzed and counted for a long time, and earlywarning information is given.

The invention provides a detection method of air conditioner refrigerant leakage. The detection method of air conditioner refrigerant leakage comprises the steps that S1, a preset standard feature curve M of change of compressor power along with frequency is obtained, and whether a compressor is in normal work or not is judged through a preset power threshold value curve N; S2, if the compressor operates normally, the refrigerant pressure in an air conditioner coiler and the accumulated use time of the air conditioner are obtained, and according to a preset pressure threshold value curve, whether refrigerant leakage happens or not is judged; S3, if refrigerant leakage happens to the air conditioner, the refrigerant leakage rate is calculated, and an alarming unit is started. The detectionmethod of the air conditioner refrigerant leakage is high in detection precision, good in accuracy and capable of effectively lowering false alarm probability.

The invention discloses a detection method of lactic acid bacteria flora changes in a biological feed fermentation process, which comprises the flora number changes of lactobacillus plantarum, lactobacillus acidophilus, bifidobacterium longum, lactobacillus casei and lactobacillus rhamnosus, The specific, sensitive and low-cost detection method is provided for determination of the amount of anaerobic probiotic bacteria in the biological feed fermentation process, which can simultaneously detect five types of anaerobic probiotic bacteria and understand a flora change rule of the five types of anaerobic probiotic bacteria in the fermentation process, and provides a technical solution for further optimizing the fermented feed.

The invention discloses a novel method for quickly detecting aflatoxin M1. The method is used for detecting aflatoxin M1 mainly on the basis of non-labeled porphyrin fluorescent dyes. According to the method, after aflatoxin M1 and porphyrin fluorescent dyes are mixed, the fluorescence intensity of the dyes increases, and the fluorescence intensity is detected to implement quick and quantitative detection on the aflatoxin M1. The method disclosed by the invention is simple, has the advantages of high specificity and high detection speed, and can satisfy the quick and accurate field detection requirements.

The invention discloses a method for rapidly detecting copper ions mainly based on non-labeled Amplex Red (10-acetyl-3, 7-dihydroxyphenoxazine) fluorescent dye and H2O2. According to the method, after the copper ions, the Amplex Red fluorescent dye and the H2O2 are simultaneously mixed, the fluorescent strength of the dye is enhanced, and the copper ions can be rapidly and quantitatively detected by detecting the fluorescent strength. The method is simple, high in specificity, rapid in detection and capable of meeting on-site rapid and accurate detection requirements.

The invention relates to the technical field of analysis and detection, and particularly discloses a method for detecting isomers in 4-(3-fluorobenzyloxy) benzaldehyde. The detection method comprises the following steps: a test solution and a reference solution are prepared; the test solution and the reference substance solution are detected by adopting gas chromatography, and the chromatographic conditions of the gas chromatography are as follows: a stationary liquid of a chromatographic column is 2, 3-di-O-methyl-6-tert-butylsilyl modified beta cyclodextrin, a detector is a flame ionization detector, the temperature of the detector is 225-235 DEG C, the initial temperature is 48-52 DEG C, the temperature is raised to 175 DEG C to 185 DEG C at the temperature raising rate of 28 DEG C/min to 32 DEG C/min, the constant temperature is kept for 35 min, and the temperature of a sample inlet is 175 DEG C to 185 DEG C. the detection method provided by the invention has the advantages of strong specificity, high sensitivity and wide application prospect.

The invention discloses a method for detecting the activity of SIRTs deacetylase based on a one-dimensional HNCO nuclear magnetic resonance spectrum and application. Comprising the following steps: transferring H3 protein plasmids into escherichia coli, adding the escherichia coli into a culture solution, adding nitrogen 15 labeled ammonia chloride and carbon 13 labeled acetic acid, and culturing to obtain nitrogen 15 and carbon 13 covalently linked H3 protein; adding nitrogen 15 and carbon 13 covalently linked H3 protein into the reaction buffer solution, and incubating to obtain a system 1; detecting the system 1 by using a one-dimensional HNCO nuclear magnetic resonance spectrum to obtain a spectrogram; adding nitrogen 15 and carbon 13 covalently linked H3 protein and SIRTs into the reaction buffer solution, and incubating to obtain a system 2; detecting the system 2 by using a one-dimensional HNCO nuclear magnetic resonance spectrum to obtain a spectrogram; and comparing the two spectrograms to judge the activity of the SIRTs. The invention relates to a method for evaluating the enzyme activity by monitoring the change of SIRTs substrates in real time by using a nuclear magnetic resonance one-dimensional HNCO spectrum.

The invention provides a multi-connected air conditioner refrigerant leakage detection method and an air conditioner. The method comprises the following steps: S1, after debugging operation of a multi-connected air conditioner system is completed, the system enters an initial parameter acquisition stage of a refrigerant leakage detection mode; S2, when the accumulated operation time t of a unit meets t1, first-stage judgment is carried out; S3, the system continues to accumulate the operation time, and when t meets t2, second-stage judgment is carried out; S4, the system continues to accumulate the operation time, and when t meets t3, third-stage judgment is carried out; if it is judged that a refrigerant does not leak in the three stages, t is reset, and control in the third stage is repeated; if it is judged that the refrigerant leaks slightly in any stage, the system is prompted to leak fluorine; and if serious leakage is judged in any stage, the system forcibly enters a liquid collection mode to recover the refrigerant. According to the multi-connected air conditioner refrigerant leakage detection method and the air conditioner, the problems that a detection method is single, and misjudgment is likely to happen are solved.

The invention provides a fan detection method and an air conditioner. The fan detection method is applied to the air conditioner. The fan detection method comprises the following steps that after a first fan is controlled to enter an appointed wind gear, the air conditioner is controlled to operate according to a first operation mode; a first theoretical heat dissipation temperature and a first actual heat dissipation temperature are acquired and the first fan is controlled to be closed; after a second fan is controlled to enter a designated air gear operation mode, the air conditioner is controlled to be in a first operation mode; a second theoretical heat dissipation temperature and a second actual heat dissipation temperature are acquired; and according to the first theoretical heat dissipation temperature and the first actual heat dissipation temperature, and the second theoretical heat dissipation temperature and the second actual heat dissipation temperature, an upper fan and a lower fan are determined from the first fan and the second fan. The control output port of the corresponding upper fan does not need to be solidified, and the upper fan can be identified automaticallyand accurately. Therefore, the universality of materials in the production process of the air conditioner is improved, and the air conditioner is more practical.