142 results about "Detection filter" patented technology

Systems and methods are provided for detecting and tracking objects. A first set of observations for a plurality of locations includes a probability that a value associated with the location is consistent with local background. A second set of observations includes a probability that the value associated with the location is not consistent with local background. A first probability tensor representing probabilities for each of a plurality of states for each of the plurality of locations is generated from the first and second sets of observations. The first probability tensor is updated according to a second probability tensor representing the probabilities for each of the plurality of states in a previous time step. It is determined that a target is present in the region of interest when a posterior probability meets a threshold value.

According to the optical metasurface filter and method for tunable edge directional enhancement, the angle of the metasurface can be rotated in a simple mechanical tuning mode, tuning of the edge enhancement direction of an amplitude or phase sample is achieved, edge filtering in different directions is achieved in an efficient and compact mode, and the optical metasurface filter and method have the advantage of chip-level ultrafast optical calculation. The invention discloses a polarization-sensitive vertical edge detection filter which is constructed by a metasurface and an optical 4F system. The metasurface (10) comprises an amorphous silicon cuboid nano brick unit (1) and a silicon dioxide substrate (2), each amorphous silicon cuboid nano brick unit has a fixed square lattice constant Px = Py = 300nm, a height H = 365nm and designed L = 129nm and W = 90nm, and the amorphous silicon cuboid nano brick units are periodically arranged on the silicon dioxide substrate; the phase is changed by changing the orientation angle theta of the amorphous silicon cuboid nano brick unit, and required phase distribution is completed.

To provide a washing dryer comprising a filter and enabling more accurate detection of filter clogging.SOLUTION: A washing dryer includes: an outer tub provided in a water storable manner; an inner tub provided in the outer tub, and storing laundry; pressure detection means detecting pressure in the outer tub; an airflow path connected to the outer tub; air blowing means provided in the airflow path and forcibly feeding air; a filter provided in the airflow path, and collecting lint; a detection portion detecting an input with respect to the air blowing means or an output by the air blowing means; notification means performing notification; and a control portion performing drying operation, and controlling the operation of the air blowing means and the notification means. The control portion detects clogging of the filter based on the input or output detected by the detection portion and the pressure detected by the pressure detection means.SELECTED DRAWING: Figure 3

The embodiment of the invention provides a real-time weak moving target detection filtering method and device based on rod cell bionics. The method comprises the following steps: processing original to-be-processed image data based on a rod cell unit to obtain a G array; processing the array G by using a first moving target detection algorithm to obtain a first matrix, and processing the array G by using a second moving target detection algorithm to obtain a second matrix; processing the first matrix by using the improved apparent level cell unit to obtain a plurality of target points and target candidate areas, processing the plurality of target candidate areas by using the apparent bipolar cell unit to obtain a first area and a second area, and selecting the second area or the first area to obtain a final target candidate area; the weak and small moving target detection result is determined based on the second matrix and the final target candidate area, the filtering method helps to help the detection method to more stably detect the weak and small moving target under the complex dynamic background, and the false alarm rate and the missing report rate can be greatly reduced while the detection accuracy is guaranteed.

A network communication acquisition unit acquires network communication from an application. A communication discrimination filter determines whether the network communication is communication to a data store, and determines whether the network communication is communication for uploading a file to the data store when the network communication is communication to the data store. When the network communication is communication for uploading a file to the data store, a suspicious file upload detection filter evaluates whether the file is encrypted and determines whether the network communication is unauthorized access based on a result of the evaluation.

The invention discloses a marine radar target detection algorithm and system based on a space-time joint filtering technology, and belongs to the technical field of marine remote sensing. In order to solve the problem of low target detection probability under strong sea clutter interference, three-stage processing is adopted: firstly, same-frequency interference suppression is performed on an original radar image sequence, polar coordinate echo data is converted to a frequency wavenumber domain through three-dimensional Fourier transform, and sea clutter energy in a frequency band [kx, ky] is filtered by using a dispersion relation filter; secondly, intercepting a central region of a specific wave number spectrum, extracting target energy meeting a linear equation by adopting a Hough straight line detection filter, and reconstructing a target enhanced image through three-dimensional inverse Fourier transform; and finally, performing target point fine detection on the processing sequence. According to the method, the strong sea clutter signal can be effectively suppressed and the target signal can be extracted only by using the echo amplitude information of the radar, so that the signal-to-noise ratio of the image is enhanced, the target detection probability under the strong sea clutter condition is further improved, and the method is suitable for all marine radars.

The invention belongs to the technical field of marine environment monitoring, and relates to an online salinity monitoring device and method for salt mist-containing air, and the device comprises a hollow cylindrical shell, one end of the hollow cylindrical shell is provided with an air supply module, the other end of the hollow cylindrical shell is internally provided with a filter, and a salt mist generator is arranged between the filter and the air supply module; the air supply module is used for providing airflow towards the filter into the hollow cylindrical shell, the salt mist generator is used for inputting salt mist into the hollow cylindrical shell and enabling the salt mist to flow to the filter along with the airflow, and the filter is used for filtering the salt mist in the airflow; a first salt mist absorption detection device and a second salt mist absorption detection device are arranged on the two sides of the filter respectively and are used for detecting the salinity in the air ducts on the two sides of the filter respectively. According to the application, the salinity in the air can be monitored on line, so that the influence effect of the filter on the salt mist concentration is judged.

The utility model discloses a microbial limit detection filter, and belongs to the technical field of filtering equipment. The utility model solves the problem that the waste liquid in the negative pressure channel easily flows back to the filter head to pollute the filter membrane at the filter head. The filter comprises a shell, at least one filter head is arranged on the shell, the filter head is connected with a suction mechanism, the suction mechanism comprises a negative pressure mechanism and a first pipeline communicated with the filter head, a first connector is arranged on the first pipeline and detachably connected with one end of a second pipeline, the negative pressure mechanism is connected with a third pipeline, and the third pipeline is connected with the negative pressure mechanism. The third pipeline is provided with at least one second connector, the other end of the second pipeline is detachably connected with the second connector, the first pipeline is provided with a check valve, and the negative pressure mechanism is connected with the liquid discharging pipe. According to the utility model, the negative pressure channel is arranged in a sectional type, and the check valve is arranged on the first pipeline, so that the probability that the filter membrane is polluted by waste liquid is reduced.

The present application discloses a coffee grinder comprising: a machine body having a motor and a grinding part for grinding coffee beans; and a device for detecting the presence of a filter and / or a filter holder in a set position suitable for receiving ground coffee, wherein the detection device comprises a normally open switch comprising a first half-support for the filter and / or the filter holder and a second half-support for the filter and / or the filter holder, the switch being arranged to close when the filter and / or the filter holder is in electrical contact with the first half-support and in electrical contact with the second half-support.

The embodiment of the invention provides an enabling regeneration circuit, a radio frequency chip and an enabling regeneration routing method, and the enabling regeneration circuit comprises an out-of-order enabling regeneration receiver which is used for selecting a plurality of out-of-order enabling signals; the time delay logic circuit is used for performing time delay processing on the out-of-order enable signal selected by the out-of-order enable regeneration receiver to obtain an enable regeneration routing signal; and the signal detection filter circuit is used for filtering the enabling regeneration routing signal to obtain an enabling regeneration output signal. According to the invention, the problems that the power consumption of the enabling regeneration circuit is large and the output signal cannot be filtered in the prior art are solved, and the effects of reducing the power consumption of the enabling regeneration circuit and preventing an invalid burr signal from being transmitted into a post-stage circuit are achieved.

A system and method for identifying the degree of dirtiness of a current filter. The system includes sensors (308, 310, 322, 324, 1808, 1810, 1822, 1824) that are coupled to a controller (104) to collect pressure differential sensor data and flow rate data associated with a material flow passing through filters (306, 320, 1806, 1820). The controller (104) applies a first filtered data set to a portion of the pressure differential sensor data and the flow rate data and applies a second filtered data set to the first filtered data set to further smooth the first filtered data set. The controller (104) further applies an edge detection filter to the second filtered data set, thereby obtaining an edge detection filtered data set and using the edge detection filtered data set and the flow rate data to determine a filter replacement threshold and an optimal filter replacement date.

The invention provides a security fault detection method based on an important data protection mechanism, and belongs to the technical field of networked system fault diagnosis. The method comprises the following steps: step 1, establishing a T-S fuzzy networked system model with time varying and time delay; 2, designing an important data protection mechanism based on coding and decoding; 3, constructing a fuzzy fault detection filter structure by using the available measurement information to obtain a fault detection system; step 4, giving a discrimination basis for ensuring that the fault detection system is bounded in random limited time and has dissipation performance in the form of a linear inequality group, and solving the linear inequality group to obtain a filter gain; 5, substituting the filter gain into the fault detection filter to generate a residual error; and step 6, calculating an evaluation function and a threshold value for generating a residual error, and judging whether a fault occurs or not. According to the method, the influence of attacks on important data can be actively defended, the data transmission security is improved, and network communication resources are saved; and the calculation burden can be effectively reduced.

The utility model provides a detection device for detecting the precision of a bacteriostatic carbon rod filter element, which comprises a base, a plurality of device cylinders and a plurality of transverse plates, the front part of the upper surface of the base is vertically and fixedly connected with a plurality of top-opened device cylinders, and the plurality of transverse plates are respectively and fixedly connected with the top ends in the plurality of device cylinders. According to the detection device for detecting the precision of the antibacterial carbon rod filter element, provided by the utility model, through the arrangement of the plurality of device cylinders and the plurality of first liquid pumps, when the device is used, a plurality of liquid for testing can be respectively placed in the plurality of device cylinders, and then the filter element is placed in the filter element pipe; according to the filter element detection device, the corresponding detection liquid is selected and used according to the precision of the detection filter element, then the first liquid pump in the corresponding device cylinder is started, the detection liquid in the device cylinder is fed into the filter element through the plurality of liquid conveying pipes for detection operation, and after the filter element with one precision is detected, the detection liquid is fed into the filter element through the liquid conveying pipes. And the filter element with another precision can be directly detected without replacing the detection liquid, so that the efficiency of the detection operation is improved.

The utility model discloses a gas detection filter, which relates to the technical field of gas detection, and comprises a shell, frames penetrate through the two sides of the outer surface of the shell, dust screens are connected in the two frames, the outer surfaces of the two frames are provided with limiting grooves, and the outer surface of the shell is respectively provided with a torsion spring shaft and a fixing plate. And the torsion spring shaft is sleeved with a limiting strip. Through the arrangement of the frame, the limiting strip, the torsion spring shaft, the limiting groove and the fixing plate, when the dustproof net needs to be replaced, only the limiting strip needs to be rotated to slide out of the limiting groove to finish limiting of the frame, meanwhile, the limiting strip is limited through the fixing plate, and the situation that the torsion spring shaft is damaged due to the fact that the rotation angle of the limiting strip is too large is avoided; then the frame is pulled out of the shell, and then the dustproof net is pulled out of the frame, so that the disassembly work can be completed; and meanwhile, limiting and fastening are achieved, and operation is easy, convenient, fast and time-saving and labor-saving.

The utility model relates to laser welding technical field especially relates to a kind of laser welding protective gas pressure detection filtering device, including air inlet pipeline, air inlet pipeline gas inlet port is equipped with pressure controller, air inlet pipeline gas outlet side is equipped with solenoid valve, air inlet pipeline gas outlet port is equipped with pressure sensor, separator and filter are successively installed in air inlet pipeline middle part, air inlet pipeline gas inlet side, separator and filter connection side and filter gas outlet side are all equipped with differential pressure gauge. By making protective gas successively through separator and filter, thereby double interception filtering to the impurity in protective gas, avoid impurity and molten metal reaction to weld defect, etch welding head lens, increase maintenance cost, and avoid impurity block pipeline, cause pressure fluctuation, wherein the setting of differential pressure gauge, the pressure value after protective gas passes through separator and filter is monitored respectively, avoid filter being blocked by impurity and unknow, affect air intake, and then lead to pressure fluctuation.

The pressure stabilizing device comprises a detecting and filtering mechanism, the detecting and filtering mechanism comprises a main pipe, the top of the main pipe communicates with a first pressure sensor, the right side of the main pipe communicates with a fixing pipe, and the right side of the fixing pipe is provided with a connecting pipe; and the right side of the connecting pipe communicates with a shell, and a filter plate is inserted into the top of the shell. According to the pressure stabilizing device for switching the oil pump of the water feeding pump turbine, the detection filtering mechanism is arranged, the pressure value is set through the PLC, in the working process, impurities in speed regulation oil are filtered out through the corresponding filter plates, and the pressure stabilizing device can be switched off when the filter plates are blocked or the oil pump of the water feeding pump turbine in the working state breaks down. The first pressure sensor can detect that the pressure value is lower than a set value, at the moment, the PLC can control the water feeding pump turbine oil pump in the working state to stop working, meanwhile, the water feeding pump turbine oil pump in the standby state can be started to work, and the oil pumps are automatically switched to work.

The invention relates to the technical field of integrated circuits, and discloses a phase-locked loop circuit, which comprises a time-to-digital converter for receiving a reference clock, a feedback clock and a frequency clock, the sampling module is used for counting and sampling a frequency clock according to a reference clock and a feedback clock and calculating frequency deviation information between the reference clock and the frequency clock and phase deviation information between the reference clock and the feedback clock; the digital frequency and phase detection filter is used for carrying out weighted integration on the frequency deviation information and the phase deviation information and generating a control signal; the digital control oscillator is used for generating a frequency clock according to the control signal; and the feedback frequency divider is used for carrying out frequency division on the frequency clock and generating a feedback clock. According to the invention, the frequency deviation information and the phase deviation information are jointly used as the input of the integral path in the digital phase frequency detection filter, so that the phase frequency detection function under the digital phase-locked loop system is realized.

Systems and methods are provided for detecting and tracking objects. A first set of observations for a plurality of locations includes a probability that a value associated with the location is consistent with local background. A second set of observations includes a probability that the value associated with the location is not consistent with local background. A first probability tensor representing probabilities for each of a plurality of states for each of the plurality of locations is generated from the first and second sets of observations. The first probability tensor is updated according to a second probability tensor representing the probabilities for each of the plurality of states in a previous time step. It is determined that a target is present in the region of interest when a posterior probability meets a threshold value.

The embodiment of the invention discloses a multi-band ultrahigh frequency detection device, a multi-band ultrahigh frequency detection method and a computer readable storage medium. The multi-band ultrahigh frequency detection device comprises an ultrahigh frequency sensor, a front-end processing module and an acquisition module. The ultrahigh frequency sensor is used for collecting an electric signal sent by a measured object. The front-end processing module comprises a band-pass filter circuit and a detection filter circuit, and the band-pass filter circuit is used for separating the electric signal into multiple sub-band signals of different wavebands; the detection filter circuit is used for collecting effective content in each sub-band signal to obtain a detection signal. And the acquisition module is used for converting the multiple paths of detection signals into ultrahigh-frequency acquisition information and uploading the ultrahigh-frequency acquisition information, and the ultrahigh-frequency acquisition information is used for representing the working condition state of the detected object. Therefore, the ultrahigh frequency acquisition information under different frequency bands can be effectively acquired, and synchronous acquisition of the ultrahigh frequency acquisition information of multiple independent frequency bands can be realized.

Various systems and methods for scheduling filter maintenance of an imaging system are described herein. An example method for scheduling filter maintenance of an imaging system includes detecting, via a sensor, that a pressure differential across a filter is below a threshold, providing, via a display of the imaging system, an alert to an operator that the pressure differential across the filter is below the threshold, and scheduling filter maintenance based on the pressure differential being below the threshold.

The invention relates to a signature authentication method for a firewall and an anti-network topology discovery system based on a firewall, which belong to the field of computer network security technology. The invention aims to solve the problems of network layer data loss and disorder and high signature authentication overhead in the existing signature authentication method for firewalls. The method of the invention explains the implementation process of the firewall signature authentication scheme based on the message hash chain from two perspectives: the basic process of signature authentication and the hash chain construction and verification scheme. In this process, the three major problems faced by the firewall will be discussed respectively: the network layer data packet loss and disorder problem, the two-way authentication problem and the firewall hash chain signature authentication information organization problem. Based on the signature authentication method of the firewall, an anti-network topology discovery system is designed, which uses a trusted detection filtering module to design three trusted detection filtering schemes based on source IP address, token and hash chain signature authentication to improve the protection capability of the firewall in the anti-network topology discovery process.

A diagnostic device for an exhaust gas aftertreatment device includes a temperature detection device that detects a filter inlet-side temperature and a filter outlet-side temperature, a differential pressure detection device that detects a differential pressure between a filter inlet-side pressure and a filter outlet-side pressure, an intake air pressure detection device that detects an intake air pressure of an engine, and a controller that determines a malfunction in an exhaust gas aftertreatment device based on values detected by the temperature detection device, the differential pressure detection device, and the intake air pressure detection device.

A filtering pipeline has been created that filters videos / audios for deepfake detection. The filtering pipeline applies a series of filtering operations that begins with filtering video / audio based on contextual content, such as keywords on a webpage proximate to a URL that links to the media). The filtering pipeline then filters based on voice detection and obtains transcripts for the remaining videos. Topic-based filtering is performed with the transcripts. If media has not been filtered out, then the filtering pipeline prompts a LLM to classify the media as promoting misleading information based on the transcript. If media has not been filtered out, then deepfake detection is run on the media.

The utility model discloses a membrane pressing ring, belongs to the technical field of algae detection filter membranes, and particularly relates to a membrane pressing ring for an algae detection filter membrane, the membrane pressing ring is used for fixing a cellulose membrane, and the membrane pressing ring consists of a membrane lower frame and a membrane pressing ring; the cellulose membrane is fixed between the membrane lower frame and the membrane pressing ring, the cellulose membrane is pressed on the membrane lower frame through the membrane pressing ring to be assembled into a whole, the membrane is fixed between the membrane lower frame and the membrane pressing ring through the mode of the membrane pressing ring, in this way, a mechanical arm can grab the membrane conveniently, and automation is achieved. A cellulose membrane with a proper diameter is selected and centered through a tool, the cellulose membrane is pressed on the membrane lower frame through the membrane pressing ring, and the cellulose membrane and the membrane lower frame are assembled into a whole.

The application discloses a substation robot inspection identification method and system, comprising: a substation equipment real-time video stream is collected by an inspection robot camera, images are intercepted at an interval of 1 frame per several seconds, and through a definition detection filtering fuzzy invalid frame, a to-be-identified image is obtained; the to-be-identified image is input into a multimodal large model, equipment type classification is completed, and the equipment types include a pointer instrument, a multi-row digital instrument, a power cabinet and an infrared image; a differentiated processing procedure is executed according to different equipment types, and reading, state or characteristic information of each equipment is output; a standardization JSON format record is generated by integrating a frame time stamp, an equipment type identifier, an identification result and an identification state, and is stored. Through the multimodal large model, accurate classification of various equipment types is realized, differentiated processing procedures are designed for different equipment, equipment information such as a pointer instrument, a multi-row digital instrument, a power cabinet and an infrared image can be efficiently identified, and the application is suitable for a complex equipment environment of a substation.

According to the technical scheme, the water detection filter element for gasoline is characterized by comprising a connecting base, and a first connecting pipe and a second connecting pipe are connected to the connecting base; the filtering mechanism is connected to the connecting seat and is used for filtering gasoline; the control mechanism is used for controlling the connection and disconnection of an oil path between the connecting seat and the filtering mechanism; the connecting seat comprises an inner pipe, a first communicating hole is formed in the top of the inner pipe, and the inner pipe is communicated with the first connecting pipe; the outer pipe is arranged outside the inner pipe in a sleeving mode, a plurality of second communicating holes communicating with the space between the outer pipe and the inner pipe are formed in the top of the outer pipe, the outer pipe is connected with a second connecting pipe, and the second connecting pipe communicates with the space between the inner pipe and the outer pipe; through the arrangement of the control mechanism, when the filtering mechanism is replaced, the oil way between the filtering mechanism and the connecting base can be closed, gasoline in the gasoline conveying pipeline is prevented from flowing out, and waste of the gasoline is reduced.

The present invention provides a fault detection method, device, power supply module, and storage medium. The method comprises: obtaining, for each location in a preset cache area of ​​the power supply module, a total fault code stored at the current location, a current fault code offset, data to be detected, preset fault detection information, and preset filtering information; performing fault detection on the data to be detected based on the preset fault detection information to obtain a current fault detection result for a target fault corresponding to the current location; filtering the current fault detection result based on the preset filtering information to obtain a current fault detection filtering result for the target fault; and updating the total fault code based on the current fault detection filtering result and the current fault code offset, thereby determining the current fault state of the target fault of the power supply module based on the updated total fault code. The present invention can simplify the code size and writing process, reduce modifications, lower the code error rate that may be caused by redundant and complex code modification and writing processes, and improve code reuse.

The application provides a filter sterilization module, a cell culture system and a filter sterilization method, comprising a filter and a temperature detection element, the filter is provided with a first connecting end, a second connecting end and a third connecting end which are communicated with each other, the first connecting end is communicated with a first control valve and a second control valve, the second connecting end is communicated with an input end of a third control valve and a fourth control valve, an output end of the third control valve is communicated with a first hydrophobic valve, the third connecting end is communicated with a fifth control valve and a second hydrophobic valve in sequence, and the temperature detection element is used for detecting the temperature in the filter. The filter can be sterilized without being disassembled from the cell culture system, the risk of secondary pollution in the process of sterilization, transfer and installation of the traditional filter is avoided, damage caused by collision in the process of disassembly, cleaning, sterilization and transfer is avoided, and the reliability and service life of the filter sterilization module and the cell culture system are improved.

The invention provides a hybrid event trigger fault detection method for a fuzzy Markov jump system, and the method comprises the following steps: for a discrete time T-S fuzzy Markov jump system, considering the modal asynchronism between the system and a fault detection filter and the asynchronism of a membership function at the same time based on a hidden Markov model and a non-parallel distributed compensation strategy; introducing a double-asynchronous fault detection filter; considering system measurement output and network communication between filters, and introducing an adaptive event triggering mechanism; the mismatching degree of the membership function is integrated into an event triggering condition, a hybrid event triggering mechanism is introduced, and the phenomenon of the mismatched membership function is processed; constructing a fault detection closed-loop system; and fault detection performance analysis and fault detection filter design are realized. The invention designs a hybrid adaptive event triggering scheme. The mismatching degree of the membership function is integrated as a part of a trigger mechanism, so that the mismatching problem is effectively solved while the trigger condition is ensured.

The detection device comprises a printer body and a detection filter box, a movable frame is fixedly connected to the middle end of the right side of the printer body, a positioning block is arranged on the inner side of the movable frame, and limiting clamping grooves are formed in the front side and the rear side of the positioning block; fixing blocks are fixedly connected to the front end and the rear end of the right side of the printer body, a two-way threaded rod is movably connected to the inner surface of each fixing block through a bearing, a rotating block is fixedly connected to the rear side of each two-way threaded rod, and moving blocks are in threaded connection to the front end and the rear end of the outer surface of each two-way threaded rod. Through the action of the moving block, the limiting sliding rod, the bidirectional threaded rod, the clamping plate, the movable frame, the positioning block, the clamping block and the limiting clamping groove, the problem that an existing detection device needs to be fixedly installed through bolts, so that the detection device needs to be disassembled and assembled frequently with the help of tools during later maintenance, and inconvenience is brought to use of people is solved.