45results about How to "The test results are accurate and effective" patented technology

The invention discloses a real-time simulation technique-based integrated testing platform for a substation. A data network board card is connected with a combining unit module and an intelligent terminal module respectively through cable connection wires; the combining unit module is connected with a message recording, analyzing and replaying device, a digital measuring and controlling device and a main transformer protecting module through specific sampling value optical fibers; the intelligent terminal module is connected with the message recording, analyzing and replaying device, the digital measuring and controlling device and the main transformer protecting module respectively through GOOSE (generic object oriented substation event) optical fibers; and the message recording, analyzing and replaying device, the digital measuring and controlling device and the main transformer protecting module are further connected with a monitoring backstage and a protecting sub-station through monitoring information switching equipment. Based on a real-time simulation system, a set of complete intelligent testing platform is formed through the signal control and transmission among interval layers and station control layer equipment by the combining unit module and the intelligent terminal module, and the detection result is accurate and effective, so that the testing platform is applicable to the simulation and testing fields of substations of various intelligent power grids.

The embodiment of the invention relates to the electric power inspection technical field, and discloses a power transmission line detection method and device; the method comprises the following steps: carrying out frame difference operation between two adjacent frame images of a collected visible light video sequence so as to obtain a difference image, and binarizing same to obtain a binary difference image; using a preset threshold edge detection algorithm to carry out edge detection for the binary difference image so as to obtain an edge binary difference image; carrying out Hough conversion so as to detect linear sections; carrying out cycle iterations and screening merging for detected linear sections according to the transmission line parallel characteristics until the obtained target linear section number is smaller than a preset value, and marking and displaying same; calculating the central position of a target zone, and sending the central position to a hang cabin so as to adjust the posture of the hang cabin. The method and device can effectively improve the power transmission line detection efficiency and accuracy, thus reducing work load of inspection personnel.

The invention discloses a video saliency detection algorithm based on saliency target background modeling. The algorithm comprises steps as follows: step 1, performing static image saliency detection on an initial frame (current frame) to acquire a saliency map of the initial frame, and acquiring a residual background according to the saliency map; step 2, performing similarity filling on pixels with pixel values being 0 in a residual background image to acquire an initial frame background model; step 3, according to the initial background model, subtracting the initial background model from the next frame through background subtraction to acquire a next frame of salient zone, performing information redundancy distinguishing on the salient zone, if the redundancy is lower, judging the salient zone to be correct, if the redundancy of the salient zone is higher, performing background modeling again on the current frame with the methods in steps 1 and 2; finally, acquiring a final salient video through sequential circulation. According to the algorithm, background modeling is not required to be performed on each frame in the video, so that the calculation speed can be higher.

The invention relates to a device and a method for measuring high pressure leakage of an injector nozzle matching part. The device is characterized by comprising a test oil channel, a first flowmeter,a second flowmeter, a first connecting pipeline, a second connecting pipeline and an oil tank, wherein the injector nozzle matching part is placed on an injection nozzle fastening seat and is compressed by a compressing device at a set compressing force to form a first seal surface and a second seal surface, the first seal surface is located on the outer side of the oil inlet of the injector nozzle matching part and the second seal surface is located on the inner side of the oil inlet of the injector nozzle matching part; the first flowmeter is mounted on the first connecting pipeline to measure the leakage of the first seal surface, and the second flowmeter is mounted on the second connecting pipeline to measure the leakage of the second seal surface. By contrastive analysis of leakage and oil return quantity, the sealing property can be better evaluated. The device can be used for testing the sealing property of the injector nozzle matching part independently, and the obtained testresult is more accurate and effective.

The invention discloses multiplex real-time fluorescent RT-PCR primer probe compositions and kits for novel coronavirus nucleic acid testing. The kits comprises multiplex real-time fluorescent RT-PCRprimers and probes for testing an ORF1ab gene and an N gene of SARS-CoV-2; the upstream primer body for amplifying the ORF1ab gene is shown as SEQ ID NO: 1, and the downstream primer body for amplifying the ORF1ab gene is shown as SEQ ID NO: 2; a probe sequence for testing the ORF1ab gene is shown as SEQ ID NO: 3; the upstream primer body for amplifying the N gene is shown as SEQ ID NO: 4, and thedownstream primer body for amplifying the N gene is shown as SEQ ID NO: 5; and the probe sequence for testing the N gene is shown as SEQ ID NO: 6. Clinical verification of China and America proves that the kits can meet testing of clinical samples at home and abroad.

The invention discloses a method for detecting corrosion resistance of stainless steel prepared by selective laser melting. The method comprises the following steps: after three-dimensional graphic design of an SLM (selective laser melting) stainless steel product, selecting a plurality of X-Y planes in the Z-axis direction, and adding three cylindrical specimens as a group in each plane, wherein each specimen has the diameter of 10 mm and the height of 5 mm; separating the prepared SLM stainless steel product from the cylindrical specimens, marking a Z-axis numerical value, and polishing and cleaning the cylindrical specimens; performing three performance tests on the three specimens in each group respectively to determine comprehensive corrosion resistance, pitting corrosion resistance and crevice corrosion resistance of the specimens. The corrosion resistance detection specimens and an actual product are prepared from the powdery raw material according to the same process parameters, a detection result is accurate and effective, and the detection process is intuitive; the stainless steel product prepared by selective laser melting is not required to be destroyed, the method is limited by the shape and the size of the actual product, the time can significantly saved, and the manufacturing cost can be significantly saved.

The invention provides an auxiliary contact rapid detection device for a VD4-type vacuum circuit breaker and a detection method. The auxiliary contact rapid detection device comprises an upper opening and a detection device outer shell, wherein the detection device outer shell is in a cuboid shell body shape, and the periphery and the lower portion of the detection device outer shell are all closed. A circuit board assembly for detecting and indicating is arranged in the outer shell. An aviation plug interface which is in circuit connection with the circuit board assembly is arranged on one side of the outer shell. A battery pack is arranged on one side in the detection device outer shell. A detection indicating panel corresponding to the size and the position of the circuit board assembly is arranged on the upper portion of the circuit board assembly for detecting and indicating. The detection indicating panel is arranged at the upper opening of the detection device outer shell and completely seals up the upper opening of the detection device outer shell. The circuit board assembly for detecting and indicating is provided with an external power supply indication module, an auxiliary contact test status indication module, an auxiliary contact working condition indication module, a VD4 circuit indication module, an auxiliary contact breaker opening status indication module and an auxiliary contact breaker closing status indication module. The auxiliary contact rapid detection device is suitable for the field of rapid detection of an auxiliary contact of the VD4-type vacuum circuit breaker.

The invention relates to a power supply loading temperature measuring device and a temperature measuring method for an emergency power supply quick switching-in device. The power supply loading temperature measuring device comprises a testing emergency power supply device; the testing emergency power supply device is in circuit connection with an aviation joint by a testing cable; the aviation joint is in circuit connection with one end of a changeable busbar quick coupling assembly of an analog temperature measuring assembly by a connecting cable; the other end of the changeable busbar quick coupling assembly is in circuit connection with an analog busbar; the analog busbar is then in circuit connection with a loading fan for simulation by a wire; and an infrared temperature measurement and feedback device is connected to each joint of the changeable busbar quick coupling assembly and the analog busbar. According to the invention, by the testing emergency power supply device, temperature influence of various emergency power supply on a quick switching-in coupling and the busbar can be effectively simulated, a detection result is accurate and effective and the important indicative judgment is made for judging whether the designed emergency power supply vehicle quick switching-in device meets the requirements of practical application. The power supply loading temperature measuring device and the temperature measuring method for the emergency power supply quick switching-in device are suitable for the field of temperature detection of various quick switching-in couplings.

The invention discloses a solar water heater support stability detection device, the device comprises a vertical rack, a simulation water tank and a driving system, a pedestal is arranged on one side of the bottom end of the vertical rack; the simulation water tank is arranged above the pedestal in a suspended manner and is driven by the driving system to move, a fixing part fixedly connected with the top end of a solar water heater support is arranged on the simulation water tank, a force sensor used for detecting force magnitude suffered by the solar water heater support is arranged on the simulation water tank, the force sensor comprises a pressure sensor for detecting vertical pressure suffered by the solar water heater support in X-axis direction, and a shearing force sensor for detecting lateral shearing force suffered by the solar water heater support in Y-axis direction and Z-axis direction; and one of the Y-axis direction and the Z-axis direction is the same with the length direction of the simulation water tank. According to the invention, the stability of the solar water heater support can be conveniently, accurately and effectively detected, and the device has good using effect.

The invention discloses an alcohol detector with both rough and precise detection functions, relating to the field of alcohol detectors. The alcohol detector comprises a shell, wherein one end of theshell is provided with a concave arc support, the support is internally provided with a plurality of infrared emitters and a plurality of infrared reflective-type sensors, the surface of the shell isprovided with a display screen, the shell is internally provided with a controller, the infrared reflective-type sensors, the infrared emitters and the display screen are all electrically connected with the controller, one end, far from the support, of the shell is provided with a sampling tube, the shell is further internally provided with an alcohol sensor, one end of the sampling tube is communicated with the alcohol sensor, and the alcohol sensor is electrically connected with the controller. In the alcohol detector with both rough and precise detection functions, besides a breath detecting system, a set of rough detection system based on an infrared detection principle is arranged; rough detection is completed by detecting on an arm, and a detected target suspected of drunk driving isprecisely detected in breath only according to a rough detection result, so that time is saved, and detection efficiency is improved.

The invention provides a control method of a mixed flow electromagnetic valve. The control method is characterized by comprising the following steps of 1, initializing; 2, inputting a water outlet temperature T; 3, detecting whether equipment has a fault or not; 4, conducting the electromagnetic valve; 5, detecting T1, T2, 1 and v2; 6, calculating a rotation angle theta of a valve core; 7, rotating the valve core to a designated position; 8, detecting whether the equipment has the fault or not; 9, making water; 10, cutting off the power of the electromagnetic valve; 11, rotating the valve coreto an initial position, and returning to the step 2; 12, cutting off the power of the electromagnetic valve; and 13, prompting the fault. The control method has the advantages that the control methodis safer and more convenient, the reliability is higher, the electromagnetic valve has a function of automatically controlling a switch in a fault state, the control accuracy is high, and a control result is more accurate and effective.

The invention relates to the technical field of sewage detection, and discloses a timing sampling device for sewage detection; the timing sampling device comprises a base; a driving rod is movably connected above the base; the inner side of the driving rod is movably connected with a rotating rod, and the other end of the rotating rod is hinged with a connecting rod I. When an extraction box rotates to pass through a protruding part of a cam, a pressing plate can drive a piston to move downwards and then upwards, so that the air pressure in a liquid storage cavity is reduced, the detected sewage is pressed into the liquid storage cavity by external atmospheric pressure, the extraction process is convenient and efficient, and due to the fact that the three sets of extraction boxes are arranged, the average value of detection results is obtained, and it is guaranteed that the detection results are accurate and effective; the rotating rod is in one stroke, a movable plate is driven by the connecting rod to complete the step of placing a dustproof cover from a grabbing belt, the external environment is prevented from polluting an extracted sample, the detection results are more accurate; the power source of the movable plate provided with the dustproof cover is still the driving rod, a new motor does not need to be added, the cost is reduced, and the practicability of the device is improved.

The invention relates to a method for detecting targeted membrane protein methylation as an imprinting gene syndrome marker, which comprises the following steps: extracting whole blood free DNA (deoxyribonucleic acid), treating the whole blood free DNA by bisulfite after the whole blood free DNA is detected to be qualified, and using the whole blood free DNA as an amplification template; designing and synthesizing a tag primer of a targeted membrane protein gene; the method comprises the following steps: mixing an amplification template with a tag primer, carrying out PCR amplification, connecting an index sequencing joint special for an illumina sequencing platform, and constructing amplicon libraries of different tags; quantificationally mixing the amplicon libraries with different tags, and sequencing on a machine to obtain a sequencing result; the obtained sequencing result is analyzed through bioinformatics, and the methylation mutation condition in the target area is obtained; and detecting the site difference of each amplicon by adopting a t test method, counting the average methylation level of each amplicon, and carrying out differential analysis on each contrast group. The methylation sites of the imprinting gene SLC22A18 are screened by adopting an amplicon methylation sequencing method, and the method has the advantages of high accuracy, high flux, short period and low cost.

The invention relates to a test device for hydrogen sulfide corrosion of metal, belonging to the technical field of test equipment. The test device for hydrogen sulfide corrosion of metal comprises areaction kettle, a hydrogen sulfide gas supply assembly, a hydrogen sulfide gas tail gas absorption assembly and a temperature control assembly, wherein a test solution is contained in the reaction kettle, a kettle cover is arranged on an upper cover of the reaction kettle, the reaction kettle is respectively connected with the hydrogen sulfide gas supply assembly and the hydrogen sulfide gas tailgas absorption assembly through pipelines, and the temperature of the reaction kettle is kept constant through the temperature control assembly. According to the invention, the hydrogen sulfide gas is introduced into the reaction kettle filled with the test solution until a hydrogen sulfide saturated solution is formed in the reaction kettle; a wet hydrogen sulfide environment is simulated, so atest result is close to the actual operation environment of a metal material; by changing the test solution in the reaction kettle and the concentration of the introduced hydrogen sulfide gas and controlling the inner temperature of the reaction kettle, the condition of metal corrosion under different external environment conditions is simulated, and the accuracy and effectiveness of test resultsare ensured.

The invention discloses a method for detecting malicious codes injected during APK operation. According to a principle that the malicious codes are injected during the APK operation by modifying a data structure of a java method in an android system virtual machine, the malicious codes injected during the APK operation are detected. By detecting whether the stored data structure of a key method ofan application in the virtual machine is changed or not, whether the malicious codes are injected during the APK operation or not is detected, so that a detection result is more accurate and effective.