34results about How to "Guaranteed real-time detection" patented technology

The invention discloses a living fingerprint verifying method based on a thin-plate spline deformable model, which collects and preprocesses the fingerprint sequence of a finger for verifying, registers the fingerprints before and after deformation, selects corresponding minutiae point pair to serve as the criterion point pair for estimating the thin-plate spline model, employs improved thin-plate spline model to describe deformation of fingerprints, computes the deformable energy of the fingerprint for verifying in each direction on the basis of model parameter to an overall bending energy vector, trains respectively on a true and a false fingerprint deformation base, obtains space distribution of the bending energy vector, respectively computes similarity from the bending energy vector for measuring to an eigen fuzzy set of true and false bending energies, and selects proper threshold value to obtain the verifying result. The invention can identify false fingerprint from the living fingerprint, effectively realizes living fingerprint verification in real-time, increases safety of automatic fingerprint verifying systems, enlarges the application range of automatic fingerprint verifying systems and has important application value in the field of biological character identification.

A method based on annular laser vision sensing for automatically locating the welded seam includes such steps as detecting annular laser tracings by CCD planar array, imaging on image sensing surface of camera, obtaining the expression equations for the X and Y coordinates of the characteristic points of said welded seam in conic coordinate system of laser, finding out the depth value of said characteristic point according to circular radius-depth relation algorithm, creating the equation for the Z coordinate of the characteristic point to be detected, finding it out, and converting the found out 3D coordinates from said conic coordinate system to the coordinate system of robot itself. Its advantage is high efficiency.

The invention discloses a fast and accurate single-stage target detection method and a device thereof, which discard the improved method of complex bottom layer and high layer network structure, and enhance the coordination and unity between the multi-layer regression characteristic diagrams of the high layer network only by optimizing the main stream structure and adding a lightweight split structure (i.e. Shunt structure). The invention uses the high-level network to carry out the maximum pooling and asynchronous convolution operation on the characteristics of the output of the bottom network, which is beneficial to the transmission of the spatial related information while reducing the dimension of the characteristic map, can improve the problem of the missing of the spatial related information and promote the diversity and the difference of the characteristics. After the shunting structure is added and the mainstream structure is optimized, the average accuracy of target detection is 80.5%, is 3.3% higher than SSD and 1.9% higher than DSSD321. At the same time, the average processing speed of 30fps is achieved on a 1080ti graphics card.

The invention relates to a fault detection and reconstruction system and method based on a dynamic-static hybrid strategy. Firstly, according to the current work mode of a control system, the fault detector and sensor configuration schemes are subjected to combined optimization; on the premise of ensuring the fault detection performance, the system energy consumption is possibly reduced; then, when the fault is detected, the real-time accurate recognition on the fault type is realized through solving the multi-model selection problem; finally, according to the recognized fault type, through the design of the reasonable switching control scheme, the control allocation and the system sterilization can be completed; the autonomous fault detection and reconstitution of the control system under various possible fault conditions can be realized. By using the technical scheme, the static fault monitoring and the dynamic fault type recognition and control system reconstruction are combined. Compared with a conventional fault detection and fault-tolerant control scheme, various kinds of potential faults can be effectively treated; the real-time performance is improved; the energy consumption is reduced; the system and the method can be applied to the high-reliability control problem of control objects of astrovehicles, mechano-electronics, chemical engineering and the like.

The invention relates to a network time delay collecting method based on distributed deployment, which aims at improving the instantaneity and the accuracy of network time delay collection. The accuracy of detection is ensured by selecting an appropriate detection algorithm and increasing the detection frequency, and the instantaneity of time delay data detection is ensured in a distributed deployment way. The method comprises the following steps of: selecting the distributed deployment way to increase the detection frequency; performing the time delay detection algorithm including a simple network and a redundant network; detecting at the frequency of multiple times every 5 min; and finally performing computation to increase the accuracy of detection. With the technology disclosed by the invention, while the instantaneity in detecting large amounts of chain time delays is guaranteed, the accuracy of time delay collection is increased through multiple detections in 5 min.

The invention discloses an on-line detection device for a shaft-sinking suspension steel wire rope, belonging to on-line detection and monitoring equipment. The on-line detection device of a shaft-sinking suspension steel wire rope comprises a plurality of force transducers, an A/D conversion circuit, an upper singlechip, a transmission circuit, a receiving circuit, a lower singlechip, a digital display circuit, a printing circuit, an alarming circuit and an executive circuit, wherein the force transducers are installed on a hanging scaffold or a suspension template platform; the A/D conversion circuit converts a tension value analog signal into a digital signal; the upper singlechip is connected with the A/D conversion circuit; the transmission circuit is connected with the upper singlechip; the receiving circuit is installed on the ground; the lower singlechip is connected with the receiving circuit via an RS232 interface; and the digital display circuit, the printing circuit, the alarming circuit and the executive circuit are connected with the lower singlechip. After the tension value of each steel wire rope is processed by the upper singlechip and sent into the transmission circuit via each force transducer, the transmission circuit sends the signal to the ground; the signal is sent to the lower singlechip via the receiving circuit to be correspondingly processed; and then, the signal is output by the digital display circuit, the printing circuit, the alarming circuit and the executive circuit. Thus, the system has the advantages of high antijamming capability, high accuracy and complete protective functions, is easy to operate, and can ensure that the stress of the suspension wire rope is detected in real time.

The invention provides a method and device for detecting CPU utilization ratio, which relates to an embedded system and solves the problem of inaccurate detection of the CPU utilization ratio. The method comprises the steps of: when a triggering condition is detected, determining a discrete time part and a sliding time part; respectively acquiring the CPU holding times of the discrete time part and the sliding time part; and computing to acquire the current CPU utilization ratio according to the CPU holding times of discrete time part and the sliding time part. The technical scheme provided by the invention is suitable for embedded systems.

An embodiment of the invention discloses a human body sitting posture supervision method. The human body sitting posture supervision method comprises an initial stage and a real-time supervision stage. In the initial stage, initial key point positions are determined through calculation of a plurality of images in a human body key point calculation network; and in the real-time supervision stage, the positions of key points in each frame of image are detected in real time on the basis of the initial key point positions, and whether the sitting posture of a human body meets the standard or not is judged according to the position relation between the key points and the relation between the same key points in a front frame and a rear frame. The human body sitting posture supervision method provided by the embodiment of the invention is simple and convenient to use, has a certain tracking function, and can provide a more accurate sitting posture judgment result.

The invention discloses a measuring system for acetylene sludge slurry parameters for desulfuration. The measuring system comprises a measuring barrel, wherein the measuring barrel comprises a cushion section and a measuring section, the cushion section is positioned below the measuring section, the cushion section is formed by encircling an inverted cone shell, the measuring section is formed by encircling a columnar shell, the inner diameter of the measuring section is appropriately equal to the large-diameter end of the cushion section, and a density gauge and a pH gauge are mounted on the measuring section; the small-diameter end of the cushion section is communicated with a slurry storage tank of a desulfuration tower through a pipeline, the top of the measuring section is communicated with one end of a measuring pipeline, and the other end of the measuring pipeline extends into a pit; the inner diameter of the large-diameter end of the cushion section is three to five times of the inner diameter of the small-diameter end of the cushion section; the height of the top of the measuring barrel is lower than the liquid level inside the slurry storage tank of the desulfuration tower. A measuring pump is cancelled, the measuring system can measure flow rate reduction of slurry by means of flowing of acetylene sludge slurry, so that the erosive wear for a lining of the density gauge and a probe of the pH gauge is reduced, and the cost for changing the density gauge and the pH gauge regularly every year is reduced.

The invention provides a vehicle front road surface accumulated water depth detection system based on a vehicle sensor, and relates to the technical field of vehicle driving safety. The vehicle front road surface accumulated water depth detection system based on the vehicle sensor comprises a vehicle and a processing unit. The vehicle comprises a sensor assembly, and the underwater depth and the water surface height at the position with the preset distance in front of the vehicle can be obtained through the sensor assembly. The system for detecting the depth of accumulated water on the road surface in front of the vehicle based on the self-vehicle sensor can meet the technical requirements of detecting the depth of accumulated water on an irregular road surface profile in front of the vehicle based on a sensor assembly carried by the vehicle; and the vehicle can detect the depth of the accumulated water on the irregular road surface contour in real time, and the driving safety is ensured under the condition of the accumulated water on the road. Meanwhile, compared with an existing method for detecting the depth of accumulated water on the irregular road surface contour, the method has the advantages of being low in cost, compact in structure and low in power consumption, a long preview distance can be achieved, and the measurement precision can be guaranteed.

The invention discloses a shut-off valve, which relates to the field of shut-off valves. The shut-off valve comprises: a valve body, a valve cover, a power supply system, a fire extinguishing system, a motor and a valve; a first pipe body and a second pipe body are arranged at both ends of the valve body The valve is set in the first pipe body; the fire extinguishing system is sleeved on the first pipe body; the valve cover and the valve body are connected by screws; the motor and the power supply system are fixed, and the electrical connection between the motor and the power supply system is realized; Drive the valve to open and close. The shut-off valve of the present invention has an independent power supply system and an independent fire extinguishing system. After the external power is cut off due to a fire, it can still automatically operate and close the valve, and the fire extinguishing system can also extinguish fire around the valve body to ensure the safety of the valve body.

A leak detection system for a pressure gas pipeline, including a hub, several spokes, a number of sensing units, and a console; wherein, the hub moves in the pipeline with the pressure gas, and is used to analyze and process the data collected by the sensing units to form real-time pressure data or pressure Gradient data, and the pressure data or the alarm signal obtained by analysis and processing are transmitted to the console; one end of the radial finger is fixedly connected with the central core (1), which is used to make the central core move with the pressure gas in the pipeline, and several radial fingers are distributed symmetrically with the central center ;The sensing unit is installed on the spoke finger to sense the pressure value of the pressure gas in the pipeline and transmit the collected data to the center; the console and the center are connected by wireless or wired to receive the signal transmitted by the center and analyze and process and send out instruction. The invention can more accurately judge whether there is leakage in the pressure gas pipeline.