228results about How to "Guaranteed accuracy and reliability" patented technology

The invention discloses a remaining driving mileage processing method of an automobile combination meter, belonging to the technical field of automotive electronics. During the normal driving processof the automobile, the remaining oil mass is obtained according to the difference between the original oil mass and the oil consumption of an oil box stored in a storer of the combination meter, and then the remaining oil mass is divided by the average oil consumption, thus obtaining the remaining driving mileage. The engine status is judged according to engine speed signals, when an engine is judged to be in starting process, whether a driver needs to oil the automobile is judged further according to the signal change of a liquid level sensor, and the original oil mass stored in the storer isrenewed after the automobile is judged to need to be oiled. The method avoids the display error of the remaining driving mileage resulted from the deviation of the signal of the liquid level sensor due to road condition change during the running process.

The invention discloses a wind driven generator part fault early warning method, which comprises the steps of: performing model training on a parallel echo state network group by calling data in a historical database, testing the accuracy of each echo state network model, and performing process statistical analysis on models satisfying the requirements so as to obtain a standard threshold of each characteristic parameter; after processing acquired different signals of all the parts of the wind driven generator, comparing each characteristic parameter in an information fusion module with a corresponding standard threshold, combining the comparison result with a corresponding weight value to give out early warning information, and adjusting the weight value of each characteristic parameter based on the practical condition of the on-site maintenance, wherein the monitored real-time data are based on the early-warning information and the on-site maintenance condition. According to the invention, health parameters of the parts of the wind driven generator are given after the monitoring results of the characteristic parameters are subjected to the fusion analysis, so that the accuracy and reliability of the early warning result are ensured.

The invention discloses a method for determining a timing reference cell during carrier aggregation. By the method, the reliability and accuracy of timing reference can be guaranteed, and the packet loss during data transmission can be reduced. The method provided by the embodiment of the invention comprises the following steps of: judging whether the current timing reference cell of a secondary time aligning group (sTAG) meets effective conditions by a mobile terminal, if so, continuously taking the current timing reference cell as a timing reference cell to be used, otherwise, sending a timing reference changing request for changing the timing reference cell to a base station by the mobile terminal; selecting a new random access cell for the sTAG of the mobile terminal according to the timing reference changing request by the base station; launching random access to the mobile terminal in the new random access cell; and determining that the new random access cell is the changed used timing reference cell by the mobile terminal after the random access is launched successfully.

The invention relates to a universal aquatic vegetation radiation transmission model. Building of the model includes the following steps that a whole aquatic vegetation system is divided into a plurality of dielectric layers which are evenly mixed and consistent in horizontal optical properties; vegetation canopy structure parameters, observation geometry and other conditions, and reflectivity and transmittance of a single leaf are input into an SAIL model for calculation extinction and scattering coefficients of a vegetation canopy to radiation, wherein the reflectivity and the transmittance of the single leaf are obtained through calculation of an SPECT model; the water body component concentration is given, absorption and back scattering coefficients of a water body are calculated on the basis of a case 2 water body optical model, and extinction and scattering coefficients of the water body and the vegetation mixed dielectric layers are calculated; according to a Cox-Munk model, scattering matrixes of a wave surface to direct radiation and diffusion radiation are calculated; bidirectional reflectivity of the aquatic vegetation system is calculated according to an adding method. The universal aquatic vegetation radiation transmission model achieves precise description of a reflectance spectrum and directional reflection features of aquatic vegetation, and is the premise and basis of radiation and aquatic vegetation interaction mechanism researches and precise remote sensing inversion of water environment parameters.

The invention discloses a rock creep-seepage coupling test system comprising a sliding piston, a cylinder body, a test piece, a water pump, a deformeter, an air pressure controller and a strain gage, wherein the test piece is installed above the cylinder body, the connecting site of the cylinder body and the test piece is communicated, the water pump is connected with water inlets of the cylinder body and the test piece through a water pipe and a pressure gauge, a water inlet is formed in the middle of the cylinder body, and the test piece is applied with a confining pressure by water; the strain gage is fixed in the middle of the test piece by glue, a hole is formed in the front end of the cylinder body, and a lead stretching out from the deformeter and the strain gage is connected via the hole; the sliding piston is connected with the test piece through a pressure head, the water inlet of the sliding piston is connected with the test piece through a water pipe, and the other end of the sliding piston is connected with a pressure stabilizing tank and the air pressure controller through a valve; according to the device, water is filled from the water inlet in the cylinder body to propel the sliding piston to apply an axial pressure. The rock creep-seepage coupling test system can be used for ensuring an accurate and reliable experimental result.

The invention provides a housing source management system and a housing source data processing method of the system. The housing source data processing method in the housing source management system comprises the steps of obtaining input housing source data; extracting keywords of multiple kinds of preset type data from the input housing source data; matching the extracted keywords with keywords of housing source data stored in the housing source management system according to type classification; under the condition that the keywords of the multiple kinds of the preset type data are matched with the stored keywords of the housing source data, forbidding input housing source data from being stored. Through the scheme, in the process of inputting the housing source data, the stored data in the system are used for carrying out keyword matching, whether the current input housing source data are stored inside the system is determined, the data are prevented from being repeatedly typed in, and therefore invalid data like disc repeating are prevented from appearing, and accuracy and reliability of the data in the housing source management system are ensured.

The invention discloses a crossing train approaching real-time pre-warning system and method based on distributed optical fibers. The crossing train approaching real-time pre-warning system comprises distributed optical fiber detection systems, a monitoring platform data center, a management terminal, a crossing terminal, an existing railway communication optical cable and multiple warned crossing installation crossing terminals. Each distributed optical fiber detection system comprises Rayleigh or Brillouin scattering distributed optical fiber vibration and strain sensors, a detection instrument and a mode recognition unit. The distributed optical fiber vibration and strain sensors are laid in the whole rail length direction, and the positions and strain and vibration signals in the advancing process of all trains are given by Rayleigh or Brillouin scattering signals in the distributed optical fiber vibration and strain sensors in the distributed optical fiber detection systems and are treated through signals of the mode recognition units, the lengths, the train positions, the real-time running speeds and the train ascending and descending direction information of all the trains on a rail covered by the optical fiber detection systems are obtained, and the approaching states of the trains at the warmed crossings distributed along the line of the rail are monitored and protected in real time.

The invention relates to a fixed-point landing method for an unmanned aerial vehicle, which solves the technical problem that an existing unmanned aerial vehicle system cannot realize high-precision and high-reliability fixed-point landing. The method comprises the following steps of: firstly, performing image identification by an infrared camera module using a deep learning algorithm for a plurality of infrared beacon modules arranged in a landing area, so as to acquire images of the plurality of infrared beacon modules on the landing area, and training and generating a model by a neural network; secondly, downloading the trained model into an unmanned aerial vehicle flight control, taking an image input by a camera as an input, loading the model by the neural network, and processing theimage to calculate the relative position information of a parking apron; and then, sending the position information as the input to the unmanned aerial vehicle flight control, thereby controlling theunmanned aerial vehicle to adjust the position, and landing it on the parking apron. The fixed-point landing method for the unmanned aerial vehicle is widely used in the technical field of aircrafts such as the unmanned aerial vehicle.

The invention relates to a manufacturing method of a polymer orthodontic bracket, which has high precision, low production cost, convenient usage and can be removed during the using process. The manufacturing method comprises the following operation steps: (1) a dental model is precisely duplicated and carried out the segmentation; (2) the dental model after the segmentation is reduced and arranged on a fixed object; (3) the precise adjustment of the position and the angle of a tooth after the segmentation is realized by using the automatic or manual method via the change of the physical state or the shape of the fixed object of the dental model; (4) the quality detection and the control of a closed loop are implemented by comparing the pre-adjusted position and the angle with the actual measurement position and the angle of the tooth; (5) the film pressing is carried out on the dental model after checking the angle and the position.

The invention relates to a layered sampling testing device for a capillary water zone. n unit columns are connected is series and stacked, so that the device is formed; a separation net of each unit column is embedded into a net embedding plate; a sealing groove is a shallow-groove circular ring with the width of about 20mm and the depth of 1mm, and the shallow-groove circular ring is polished along the inner edge of the net embedding plate to the outer edge, and the diameter and the depth of the circular ring are approximately equal to the diameter and the thickness of the separation net; the lower surface of a lower flange, the edges of the sealing groove and the upper surface of the net embedding plate are painted with organic glass cement uniformly, so that a lower flange disk and the net embedding plate are attached together, and the separation net and an organic glass column pipe are fixed closely further; sizes of an upper flange and the lower flange of each unit column are the same with those of the inner diameter and the outer diameter of the net embedding plate, and a lower flange disk of a previous unit column can be stacked on an upper flange disk of a unit column of a next layer in a seamless manner; rib plates are arranged in position of joints of the upper flange disk, the lower flange disk and the organic glass column pipe; and the unit columns are connected through screws in flange screw holes, so that the unit columns are sealed, connected in series and stacked. The device is simple in structure, low in manufacture and maintenance costs, convenient in operation and high in applicability, and can be popularized and applied widely in fields such as civil engineering, geotechnical engineering and the like for physical simulation researches on various rock and earth masses under the action of capillary water.

The invention relates to a novel vertical type thermocouple detecting furnace. A multi-section heating furnace body mainly comprises a vertical main furnace tube and auxiliary furnace tubes, as well as a horizontal hot base, wherein a heating hole groove is prearranged on the main furnace tube and is uniformly distributed outside a heating furnace tube, a small-diameter helical tube type heating wire can be arranged on the main furnace tube in a tube penetrating type winding way, and the helical intervals in the axial direction are sparse at the upper part and dense at the lower part to keep the maximum temperature area at the bottom; a multi-position temperature measuring hole groove is also prefabricated on the main furnace tube for three-dimensional multi-point temperature measurement;heating hole grooves are also prefabricated on the auxiliary furnace tubes which are sleeved outside the main furnace tube and are specially used for regulating the uniform temperature field and compensating the heat conduction loss of the thermocouple; and a heating hole groove is also prearranged on the horizontal hot base, and can arrange the small-diameter helical tube type heating wire in a cyclotron way and is specially used for regulating the maximum temperature point at the bottom. The multi-section heating automatic intelligent regulating technology is used for changing the heating temperature field, thereby quickly establishing a stable uniform temperature field; and moreover, after the detecting process is finished, the furnace body is quickly cooled, thereby ensuring the accuracy and the reliability of thermocouple detection.

The invention provides a deep well hydrocarbon reservoir temperature and pressure intelligent on-line monitoring device. A test plane and a transition plane are processed in the eccentric oil pipe, an optical fiber Bragg grating strain sensor is formed on the test plane through high-temperature bonding, one end of the optical fiber Bragg grating strain sensor is fixedly arranged on the test plane, and the other end of the optical fiber Bragg grating strain sensor passes through an optical fiber channel arranged between the test plane and the transition plane to reach the transition plane. One end, near the transition plane, of the optical fiber channel is connected with a stainless steel capillary pipe, the optical fiber penetrates into the stainless steel capillary pipe after being led out from the optical fiber channel, the stainless steel capillary pipe approaches to the transition plane and extends to a position near an optical fiber modem interface on the well, and the optical fiber is protected from being influenced by external severe environment in the whole process. The on-line monitoring device related by the invention realizes the deep well oil pipe structure integration, and has the advantages that the size is small, no additional auxiliary structure is adopted, the anti-interference capability is high, signals are stable and reliable, the response speed is high, and the like, and the on-line obtaining precision and the reliability of key information such as deep well hydrocarbon reservoir temperature and pressure can be obviously improved.

The invention discloses a bearing testing device of a locomotive traction motor. The device comprises a test shafting part, a lathe bed, a platform, a power-driven system, a dynamic loading system, a lubrication system, an induced airflow simulation system and a monitoring system. A proportional pressure reducing valve is adopted to apply constant or pulsative radial load and alternating axial load to a test bearing; a high-low temperature box is adopted to heat or cool a test shafting; a large centrifugal fan is adopted to simulate an ultra-high air speed; a test collecting system is adopted to test and collect test parameters such as temperature, pressure, vibration, a rotational speed, an air speed and the like; and a tester microcomputer performs automatic control, monitoring and recording, and has functions of automatic protection, overheat alarm, abnormal vibration alarm and the like.

The invention discloses a bearing-free magnetic flux switching permanent magnet motor rotor eccentric displacement compensation controller. A real-time rotating speed is input into an adaptive LMS filter, and the output of the adaptive LMS filter is a displacement compensation value; a rotor radial eccentric displacement and a rotor displacement command value and a displacement compensation valueare subjected to error comparison, and an error value is input into a corresponding PID controller; the PID controller converts the error value into two control components of the suspension force andinputs the suspension force into a suspension force winding current calculation module; a three-phase torque winding control current and a three-phase torque winding phase voltage are input into a torque winding air gap magnetic field estimation module, and the torque winding air gap magnetic field estimation module obtains rotor winding air gap flux linkage amplitude and phase and inputs the rotor winding air gap flux linkage amplitude and phase into the suspension force winding current calculation module; the suspension force winding current calculation module obtains a suspension force winding control current command value, and an inverter performs compensation control on the eccentric displacement of the suspension force rotor; the actual eccentric position center of the rotor does notneed to be detected, and the detection precision is improved.

The invention discloses a control system for a fatigue certification experimental test on the blades of a wind turbine. The control system comprises a test bed, a load vibration device, a strain gauge, a bridge-type strain processor, a high-speed synchronous data acquisition card, a computer, a storage and a display, wherein the bridge-type strain processor comprises a shunt calibration module capable of recalibrating the sensitivity of the strain gauge, a bridge circuit temperature compensation module capable of compensating an environmental temperature change, and a linear expansion coefficient error between the strain gauge and a tested blade material, and a strain value return-to-zero module capable of returning the initial strain value of the tested blade to zero; an automatic control monitoring module and a test data processing module are installed in the computer, the automatic control monitoring module is used for comparing real-time test strain signal data with a designed value so as to judge whether the test strain value is in the range of the designed value, and deciding whether the output for an invariable-frequency control signal, a variable-frequency control signal or a shut-down control signal of a frequency converter is kept or not according to the judged result, and the test data processing module is used for converting strain voltage signal data to an actual strain measured value.

The invention relates to a communication method for weighing system based on digital sensor, which requires files building of a key and its password on release date as well as a key for digital sensor. The process of the said method is that: firstly, the key and its password for the storage system of the weighing instrument are downloaded to the digital sensor, from which the key and its password on release date can be obtained; secondly, the weighing instrument sends the communication orders to the target digital sensor, and the encrypted data packet, encrypted and generated through key files of digital sensor, data flow and system cipher, is sent to the target digital sensor; thirdly, after monitoring and receiving the packet, the target digital sensor will make a deciphering and recovery to obtain the system raw data by system key and key on release date, and then take it as the communication order; fourthly, after receiving the communication order, the target digital sensor will make a data packet of the sampled weights, and the data packet, the key on release date and the system cipher, encrypted and generated as the release encrypted data packet, will be sent to the weighing instrument; lastly, after monitoring and receiving the release encrypted data packet, the weighing instrument will make a encryption to obtain the weight data by system cipher and key on release date. Thus the transmission and communication of weight data is achieved. The invention ensures a security and reliability of the channels for weight data transmission.

The present application discloses a method, apparatus and system for measuring finger dryness and wetness. Measurement methods include: obtaining a fingerprint image; obtaining a fingerprint signal intensity and an image background intensity according to a fingerprint image; and determining a finger's degree of wetness and dryness according to a fingerprint signal intensity and an image background intensity. The method, the device and the system for measuring finger dryness and wetness provided by the present invention obtain the fingerprints by acquiring the fingerprints and obtaining the fingerprinting signal intensity and the image background intensity according to the fingerprints image by analyzing and determining the fingerprint signal intensity and the image background intensity wet degree effectively overcomes the defect that the traditional technology is susceptible to image background fluctuation, noise and the like and has low accuracy due to the analysis and comparison of images, thereby ensuring the accuracy and reliability of finger dryness and wetness measurement. In addition, Through the accurate measurement of finger dryness is conducive to fingerprint acquisition technology improvements and optimization.

The invention provides a detection circuit and method for a power-down delay circuit, a power-down delay device and an electrical appliance. The detection circuit of the power-down delay circuit includes a charge and discharge control module and a processing module; the charge and discharge control module is used to control the conduction and disconnection between the power supply and the power-down delay circuit, so as to The delay capacitor is charged and discharged; the processing module is used to control the conduction and disconnection between the power supply and the power-down delay circuit through the charge and discharge control module when the power supply is not powered off , and judge whether there is a fault in the power-down delay circuit according to the time from when the voltage of the detection port drops to the set voltage from when it is disconnected. By detecting the power-off delay time of the power-down delay circuit, the present invention can conveniently judge whether there is an abnormality in the power-down delay circuit, thereby facilitating timely sending out fault reminders to the abnormal power-down delay circuit.

The invention discloses a graphical detection display method for real-time monitoring of a grinding state. According to graphical detection display method, a sonar measuring system, a PLC and a numerical control system are included. The graphical detection display method is characterized in that the sonar measuring system comprises a sonar sensor, a receiver, a transmitter and a signal processing unit, the sonar sensor is installed inside a grinding wheel spindle, the transmitter and the receiver are symmetrically installed on an accessory support, the sonar sensor collects a sound wave signal generated in the grinding process and transmits the sound wave signal to the receiver in a wireless mode, the transmitter uploads the sound wave signal transmitted by the receiver to the signal processing unit, the signal processing unit processes the sound wave signal into a four-way switching value interface signal according to different sound wave states, the four-way switching value interface signal is connected with the PLC through a signal transmission cable, the numerical control system reads the four-way switching value interface signal uploaded by the PLC, and the four-way switching value interface signal represents the whole grinding length in a rectangular mode. According to the graphical detection display method for real-time monitoring of the grinding state, the precision and reliability of grinding are ensured, and efficiency of grinding examination accomplishment is greatly improved.

The invention provides a method for determining accuracy of an angle measurement signal emitted by a rotary transformer. The method comprises the following steps: determining whether data output by an angle measurement unit of the rotary transformer is abnormal based on three determination criteria by using angle measurement data respectively acquired by a coarse machine and a fine machine of the rotary transformer; and determining whether a system enters into a normal operating mode or a safe mode under controlling of a motor according to determination results. The method provided by the invention has been applied in controlling of a low speed framework of a control moment gyro and can ensure safety of framework control and satellite attitudes.

The invention aims at providing a redundancy-configuration-based strapdown inertial navigation system single-axial rotation modulation method. The method comprises employing a four-gyroscope symmetrical and sideling redundancy configuration scheme equipment strapdown inertial navitation system, specially designing a single-axial continuous rotation scheme aiming at the formed four-gyroscope redundancy system, calculating the gyroscope equivalent measure value on a carrier system according to the system scheme, substituting the gyroscope equivalent measure value into the system for navigation resolving, and continuously output the carrier attitude, speed and position navigation parameters in real time. The method is capable of improving the system reliability and guaranteeing the system to still effectively work when a single gyroscope fails, and also is capable of eliminating navigation error caused by gyroscope drifting without introducing any external information and further improving the system precision performance. The method realizes relatively comprehensive performance improvement of the navigation system, guarantees long-term effective work of the system to a great degree, and possesses extremely high engineering application value.

The invention discloses a confined aquifer dispersion test device and a test method thereof. The device comprises a pressure testing pump, a drill pipe, a hydraulic plug, a one-way valve, a high-pressure pipe, a pressure water pump, a monitoring probe, a direct reading cable and a data receiving device. The design that the drill pipe assists in connecting the hydraulic plug and the one-way valve is adopted, the hydraulic plug can effectively isolate underground water at upper and lower parts of the set depth for release of a tracer in a dispersion test main drill hole, the tracer is injected under pressure, accurate control of the injection depth and injection dose of the confined aquifer tracer can be realized, accuracy and reliability of confined aquifer dispersion test data can be guaranteed, the test data can be recorded automatically, and the test efficiency and accuracy can be greatly improved. The device can be applied to all drilling dispersion pressure tests.

The invention relates to a sandy water bottom BRDF (Bidirectional Reflectance Distribution Function) model based on a Hapke model. The sandy water bottom BRDF model based on the Hapke model comprises the following steps: calculating the single scattering albedo of soil particulate matters and the asymmetry factors of a scattering phase function based on a Mie scattering model; inputting the single scattering albedo and the asymmetry factors of the scattering phase functions which are obtained through Mie scattering calculation, set hot spot widths and hot spot heights into the Hapke model, and calculating so as to obtain the bidirectional reflectivity of bare soil; giving the concentrations of water body components (chlorophyll a, inorganic suspended matters and yellow matters), a water depth, a sun incidence zenith angle and a water bottom albedo so as to construct an optical shallow water body biological optical model; and coupling the Hapke model and the optical shallow water body biological optical model so as to form the sandy water bottom BRDF model. The sandy water bottom BRDF model has the advantages that the accurate descriptions for sandy water bottom direction reflection characteristics are realized under the conditions of different water depths, water quality, water bottom roughness, albedos and sun incidence elevating angles and are the precondition and foundation for realizing the accurate remote sensing inversion of water depths and water environmental parameters in an optical shallow water zone.

The invention relates to a diarrhea pathogen multi-gene detection system as well as a kit and application thereof. The detection system comprises 22 pairs of primers, wherein the 22 pairs of primers comprise 19 pairs of diarrhea pathogens, 2 pairs of human genome internal references and 1 pair of system quality control internal reference primers. The diarrhea pathogens are used for treating campylobacter jejuni, shigella, clostridium difficile, salmonella enteritidis, salmonella typhimurium, enterotoxin of escherichia coli, escherichia coli O157, vibrio, yersinia enterocolitica, human astrovirus, norovirus II, human enteric adenovirus, rotavirus and the like. According to the diarrhea pathogen multi-gene detection system and the kit thereof, steps including conventional culture and the like do not need to be adopted and synchronous detection and analysis of a plurality of types of the diarrhea pathogens can be directly carried out on an excrement sample in the same reaction system; the disadvantages of a conventional detection method that the flux is low, the consumed time is long, the detection rate is low and the like are made up; comprehensive, precision and low-cost pathogen diagnosis is provided for clinic at the first time and important reference is provided for individualized drug administration and precision medical treatment.

The invention discloses an intelligent power generation system which comprises a plurality of intelligent wave power generation units, a bus, an inverter circuit, a chemical energy storing device or physical energy storing device, an energy storing management circuit, a load detection circuit, a central base station and a wave height meter, wherein each intelligent wave power generation unit comprises a wave energy capture device, a pole-changing multi-speed permanent magnet generator, a DC / DC converter, an intelligent controller, a floating body, a balance weight device, a bracket, a storm prevention mechanism, an anchor, a contactor switch, a rectifying circuit, a DC / DC converter, a speed measurement motor and a position sensor. The intelligent power generation system is applicable to waves of various shapes, the wave energy conversion is efficient, the power generation is stable, the generated power is high in quality, and the power generation system is intelligentized, strong in storm prevention capability, low in cost and easy to maintain.

The invention discloses a fixing device for use in inspection of skin parts. The fixing device is characterized in that: magnetorheological fluid(2) placed in a magnetic field source is used as support medium; the skin parts are assembled under a liquid-state condition by utilizing the physical characteristics of the magnetorheological fluid(2) that can realize solid-liquid conversion under an action of medium-strength magnetic fields; and by changing the physical environment of the phase change materials, the uniform support of the magnetorheological fluid(2) in the liquid state is realized, so that the parts are not forced to be contacted with a clamp, the influences of the forced clamping on the external shape of the parts are avoided, the original fixing device is greatly simplified, and the accuracy and the reliability of the three-dimensional measurement shape of the skin parts are guaranteed. The fixing device also has the characteristics of instantly completing the phase change with the magnetorheological fluid(2) as the support medium, using a permanent magnetic disc(1) as the magnetic field source, not needing an external power supply, saving energy, along with convenient use.

The invention relates to the field of sterile detection, in particular to a fully closed membrane filter for sterile examination of a sterile packaging interlayer and a detection method of the fully closed membrane filter. The fully closed membrane filter comprises two bacterium collecting incubators and an air filter device, wherein the two bacterium collecting incubators and the air filter device are connected to one end of a three-phase circulator by virtue of a conduit; the other end of the three-phase circulator is connected to a sterile sampling needle by virtue of a detection tube; and an intercepting clip is arranged on the part, close to the three-phase circulation valve (the three-phase circulator), of the conduit. By virtue of the fully closed membrane filter disclosed by the invention, secondary pollution on leaching liquor during operating is reduced, a microorganism detection rate is improved and an experimental result is better guaranteed. The circulation of medicine liquid in a sealed space is achieved and the medicine liquid is prevented from getting into contact with external side, so that the fully closed membrane filter plays a great role in the prevention of microbial pollution. Meanwhile, as for operation time, the experimental operation time is shortened by half, the detection efficiency of test article sterile examination is greatly improved, and a detection pollution rate is reduced to be less than 5% from original 20-25%.

The invention provides an outdoor environment temperature detecting and correcting method for a variable-frequency air conditioner. The method comprises the following steps of step 1, starting the airconditioner and making the air conditioner operate in a refrigerating mode; step 2,detecting an outdoor environment temperature T10 and an condenser middle coil temperature T20 through the air conditioner when the air conditioner is started, judging whether the correction starting condition is met or not, if yes, carrying out step 3, and if not, not correcting an outdoor environment temperature T1; step 3,after the air conditioner continuously running first rated time t1, detecting an outdoor environment temperature T11 in real time; and step 4, taking second rated temperature difference B asa benchmark, judging that whether the T11 minus the T10 is larger than or equal to the B, if yes, correcting the T1, and if not, not correcting the T1. According to the method, the outdoor environment temperature detected by the air conditioner can be corrected efficiently and accurately, so that the situation that the refrigeration effect of the air conditioner is bad caused by the fact the highest frequency allowed to operate of a compressor is excessively reduced due to the too high outdoor environment temperature detected by the air conditioner is avoid.

The invention relates to a direct-current transmission converter valve tower and a water leakage detection system thereof. The direct-current transmission converter valve tower comprises the water leakage detection system, The water leakage detection system comprises a water accumulating tray, a detection device, a light emitting device and a light receiving device, wherein the detection device is fixed to the lowest position of the water accumulating tray and comprises a total reflection prism, and the light emitting device, the total reflection prism and the light receiving device form a sealed light path. The water leakage detection system further comprises a light shielding cover plate covering the detection device. According to the direct-current transmission converter valve tower and the water leakage detection system of the direct-current transmission converter valve tower, the total reflection prism is used as water leakage detection equipment, whether the water leakage situation exists or not is judged through whether the light receiving device receives light signals or not, and the reliability and the accuracy of water leakage detection are ensured.