49results about How to "Convenient and effective detection" patented technology

The invention relates to a high-voltage single-core power cable partial discharge online monitoring method. A first high-frequency current sensor, a second high-frequency current sensor, a third high-frequency current sensor and a fourth high-frequency current sensor are disposed sequentially on a power cable, and the four high-frequency current sensors collect pulse interference signals in the power cable; the pulse interference signals collected by the four high-frequency current sensors are transmitted to a detection unit, and the detection unit carries out digital processing of the pulse interference signals transmitted by the four high-frequency signal sensors respectively; and the detection unit transmits the signals after digital processing to a test host, and the test host carries out a comparative analysis of pulse times between the first high-frequency current sensor and the second high-frequency current sensor and between the third high-frequency current sensor and the fourth high-frequency current sensor, determines the discharge position of the power cable based on the comparative analysis results, and stores and displays the discharge position information of the power cable.

The invention provides an unmanned vehicle braking control system and method. The unmanned vehicle braking control system comprises an electric cylinder, a braking pipeline system, a data collection card, a controller, a decision making layer, a wheel speed sensor for detecting vehicle speed and an oil pressure meter for detecting braking pressure of the braking pipeline system, the data collection card is used for collecting data of the wheel speed sensor and the oil pressure meter, the decision making layer sends an expected vehicle speed signal to the controller, and the controller is used for collecting data transmitted by the decision making layer and data of the oil pressure meter. Braking effect controllable in braking force is accurately realized by collecting current vehicle speed and current braking pressure, comparing them with expected vehicle speed and expected braking pressure and controlling extension and contraction of the electric cylinder.

The invention provides an edge sensor and defect inspection device capable of reliably detecting breach, crack, or the like defects produced in transparent or semitransparent objects. When inventive edge sensor detects the edge position of transparent body or semitransparent body located in a parallel monochromatic light from the output of line type sensor formed by a plurality of light sensitive units arranged in a specified spacing, the edge sensor start to search the output of the line type sensor from free-space side, detects a first detection position where the luminous quantity drops to the first luminous quantity threshold in a luminous quantity distribution pattern produced by the edges of the object, and then detects a second detection position where the luminous quantity further drops to a second luminous quantity threshold value. So that the breach, crack, or the like defects are detected by variations of the first and second detection positions during scanning checkpoints along the edge.

The invention discloses a fault detecting method of a bypass valve of a multi-connected air conditioner system. The fault detecting method comprises the following steps that after the multi-connected air conditioner system receives a detection instruction of the bypass valve, the multi-connected air conditioner system is controlled to enter a test running refrigerating mode; a compressor is controlled to run at preset frequency, and only the bypass valve is controlled to be in a starting state; and the temperature value of an air return opening of the compressor and/or the pressure value of the air return opening of the compressor are/is obtained, and whether a fault happens to the bypass valve or not is judged according to the temperature value and/or the pressure value. According to the method, whether the bypass valve between an exhaust opening and the air return opening of the compressor works normally or not can be effectively and conveniently detected, and therefore the situation that the air return overheating degree of the air return opening of the compressor is too small, consequently, liquid impacts of the compressor are caused, and high-pressure protection happens to outdoor units due to too high exhaust temperature of the compressor can be effectively avoided, and then safe and reliable running of the multi-connected air conditioner system is guaranteed. The invention further discloses the multi-connected air conditioner system.

The invention discloses a ceramic bottle leakage detection method. The ceramic bottle leakage detection method comprises the following steps: A pouring water to a to-be-detected ceramic bottle and placing the to-be-detected ceramic bottle into a container, B adding water to the container, and the water level of the container is lower than that of the to-be-detected ceramic bottle, C respectively plugging two testing pins of a resistance meter into the water in the to-be-detected ceramic bottle and the water in the container of the to-be-detected ceramic bottle to measure resistance values inside and outside the to-be-detected ceramic bottle, and D judging if the problem of leakage exists or not according to the size of the resistance values, when the resistance values tends to infinity the problem of leakage is smaller, and when the resistance values tends to 0 the problem of leakage is greater. The ceramic bottle leakage detection method has the advantages of being simple in detect method, convenient to detect, and effective in detection.

The invention relates to a device and a method for detecting pesticide residues in fruits and vegetables. The device comprises a detection device upper cover (1) and a detection device main body (2) connected to the detection device upper cover (1). The device is characterized in that the detection device main body (2) comprises a power supply module (3), a reagent storage module (4), a detected sample chamber (5), an input module (6), a detection module (7), a computing module (6), and an output module (9). The device is a portable detection device adopting an enzyme reagent method and can realizes the whole detection on pesticide residues in fruits and vegetables. The device has a high integrated level and realizes convenient and effective detection on pesticide residues in agricultural products such as fruits and vegetables outside of the laboratory.

The invention provides a method, a device and a system for processing a mobile phone and SIM card fault, and belongs to the field of service support, wherein the method for processing the mobile phone and SIM card fault comprises the steps of: carrying out data tracking on a subscriber identity module (SIM) card according to a received data tracking instruction, so as to obtain communication data between the SIM card and a mobile terminal; transmitting the tracked communication data to a network side server; receiving a first fault solution corresponding to the communication data and returned by the network side server; and feeding the first fault solution back to an SIM card user. By adopting the method, the device and the system for processing the mobile phone and SIM card fault, disclosed by the invention, the data analysis and the fault detection on the SIM card can be conveniently and effectively carried out.

The invention discloses a method and device for port scanning detection, a computer device and a storage medium. The method comprises: a shopping basket corresponding to a log source generation sourceIP is visited based on a target server port and the shopping basket is excavated based on an association rule to obtain a frequent k item set of port visiting of the target server cluster by the source IP; k value and variance ranking is carried out on the frequent k item set and a port scanning behavior of the source IP is determined based on ranking results; and a confidence coefficient of theport with the identified port scanning behavior in the frequent K item set relative to a preset high-risk port is calculated. According to the invention, the frequent k item set is found out based onthe association rule, the port scanning behavior is detected by setting the k value and variance thresholds, and the high-risk port is identified further by setting the confidence coefficient threshold. Therefore, the detection precision of the port scanning behavior and the high-risk port recognition degree are improved; and the false alarm rate is reduced.

The invention relates to a lateral movement attack detection method and system based on a heterogeneous graph network. According to the method, based on an authentication log of an intranet, a login behavior graph between a user and a host is structured, a user login graph and a source host path graph are constructed, and then two-stage anomaly detection is performed on the graphs. In the first stage, based on a user login graph, a mutual information maximization graph neural network algorithm is used to learn a behavior pattern of a host, and then a partial abnormal sample is calculated through a local abnormal factor algorithm; and in the second stage, based on the source host path diagram and the labeled sample obtained in the first stage, semi-supervised learning is performed by using a heterogeneous diagram attention network algorithm, and a lateral movement attack behavior is detected. According to the method, the lateral movement attack behavior can be simply and effectively detected without sample labels, the effect exceeds that of most supervised learning methods, and the method has a high recall rate and a low false alarm rate.

The invention discloses a gene chip detection method based on mixed probes. The gene chip detection method comprises the following steps: controlling the effectiveness of a prepared gene chip by using two different fluorescent markers, mixing target probes into relatively short quality control probes marked by a first fluorescent group so as to prepare a sample application solution, performing sample application on the sample application solution on a substrate modified with arm molecules so as to form probe spots, hybridizing a sequence which is marked by a second fluorescent group and is to be detected with the target probes, and detecting fluorescent signals transmitted from the spots, wherein the first fluorescent group is used for marking and detecting whether the target probes are fixed on the chip substrate or not, and the second fluorescent group is used for marking and detecting the sequence information of the sequence to be detected. When two types of fluorescence are simultaneously used, whether the target probes are fixed on the substrate or not can be rapidly, easily and conveniently detected, so that the experiment result of false-negative caused by unfixed target probes is excluded.

The invention provides a fork arm type window glass lifter final inspection table device which comprises a working table, a chute clamping strip, a rotary shaft supporting point, a power module supporting point and a quick clamp. The position of the chute clamping strip corresponds to a chute of a fork arm type window glass lifter, the position of the rotary shaft supporting point corresponds to a rotary shaft, the position of the power module supporting point corresponds to a power module, the position of the quick clamp corresponds to an output shaft, and an eccentric wheel is arranged under the chute clamping strip. In addition, the fork arm type window glass lifter final inspection table device is further provided with a bearing block, wherein the weight of the bearing block is approximately equal to the weight of window glass. The fork arm type window glass lifter final inspection table device can conveniently and effectively detect the fork arm type window glass lifter, accordingly verify the working reliability of the glass lifter so as to prevent unqualified products from being output from a production line and avoid quality accidents.

The invention discloses a nanofiber molecularly imprinted membrane with high selectivity for putrescine and a preparation method thereof. The preparation method comprises the steps that vinol is stirred and dissolved in deionized water at the temperature of 85-95 DEG C, then 1, 4-butanediol is added at the temperature of 65-75 DEG C, after stirring, a spinning solution is obtained and then put inan injector with a 12-21# needle head with the diameter of 0.51-0.60 mm, the injector is placed in an electrostatic spinning machine, and a nanofiber membrane material is prepared through spinning; methyl alcohol is adopted for elution, and then a ninhydrin solution is dropwise added to obtain the nanofiber molecularly imprinted membrane. The prepared nanofiber molecularly imprinted membrane material is a nanometer thin membrane and has good capacity of adsorbing putrescine and a certain regeneration using property. A raw material is a quite safe macromolecule organic matter material, has theadvantages that the raw material is non-toxic and has no side effects and good biocompatibility, and is widely applied to the field of biomedicine.

The invention discloses a high-speed rail measurement control point CPIII marking post detector, which consists of a base (1), a first cylindrical detection platform and a second cylindrical detection platform which are arranged on the base and are distributed along the length direction of the base, a micrometer dial and a supporting mechanism of the micrometer dial. The base is in a long-strip steel plate integrated structure. The base (2) and the base (3) of the two detection platforms are respectively fixed on the base (1). The two detection platforms are respectively provided with a hollow cylindrical sleeve (7) and a hollow cylindrical sleeve (8) which can be sheathed with the bases and can rotate around the outer edges of the bases. A socket which is used for connecting with a measured marking pin is arranged at the top end of the hollow cylindrical sleeve (7) on the first cylindrical detection platform. A guide hole in which a measured anchoring bolt is inserted is arranged in the hollow cylindrical sleeve (8) on the second cylindrical detection platform. The high-speed rail measurement control point CPIII marking post detector has the advantages that the problem in detecting the machining accuracy of CPIII control point devices is solved and the detector can be effectively used in engineering to improve the repetitive placement and exchange accuracy of CPIII control point marks.

A process for extracting DNA used to detecting the transgenic components in food by PCR method includes treating sample by cracking liquid, centrifugal separation to obtain supernatant, filtering, adding extractant, centrifugal separation to obtain supernatant, adding resin, adsorbing DNA, eluting, centrifugal separation to obtain filtrate containing DNA, and precipitating DNA.

The invention discloses a method for simply identifying drought-enduring type varieties in a sugarcane breeding process, and particularly relates to the field of identification of sugarcane varieties.The method comprises the following identification steps: S1, firstly, selecting land parcels at the same dry slope in a natural arid region, performing drought resistance contrast planting on a plurality of different strain materials in an identification nursery performing breeding in a 'five-nursery system', with produced drought-enduring varieties as contrast, performing shallow planting and thin soil covering, and respectively recording the production shape of seeding-stage sugarcane plants of each variety under the drought condition, including rate of emergence, seedling emergence speed,dead bud rate and tillering rate; and S2, after sugarcanes enter a jointing and elongation period, major investigating and recording the drought-enduring expression of different varieties at the elongation initial stage, further performing overall evaluation and identification on field agronomy indexes, and performing comparison with check varieties so as to identify relative drought-enduring typevarieties. According to the method disclosed by the invention, through combination with field experiment data, agronomic character indexes and economic character indexes of other experiment nurseries, high-yield high-quality drought-enduring varieties can be screened out.

The invention discloses a method for identifying transgenic soybean plants through a flower color. The invention provides a nucleic acid molecule. The nucleic acid molecule is a DNA molecule composed of a nucleotide sequence shown as a sequence 1 in a sequence table. A inventor of the invention finds that the soybean flower color is a phenotype which is easy to identify, a white flower can be changed into a purple flower through overexpression of a Z1 gene, and the method can be used as a visual phenotype identification index for identifying a soybean transgenic positive plant. Therefore, when placed on a visual report system, transgenic soybean plants can be detected conveniently and effectively.