46results about How to "Position determination is accurate" patented technology

A method for determining the position of an element driven along a travel segment by a shaft of a motor includes counting current ripples detected in an armature current signal of the motor as the motor shaft rotates to drive the element. A first time interval between when the motor is turned on with power being supplied to the motor and when the first current ripple is detected is determined. A second time interval between when the last current ripple is detected after the motor has been turned off with the power supplied to the motor being interrupted and when the motor shaft stops rotating is determined. First and second current ripple components corresponding to the first and time intervals, respectively, are estimated. The position of the element along the travel segment is determined based on the counted current ripples and the estimated first and second current ripple components.

The invention relates to a method and a device of face recognition. The method comprises the following steps: acquiring a target image on which face recognition needs to be carried out; carrying out multi-layer convolution processing on the target image; combining a preset number of pooling results of convolution feature mapping in a multi-layer convolution processing to obtain a final external processed image; classifying the final external processed image; carrying out bbox regression processing on the final external processed image; and calculating and obtaining a face position of the target image according to a classification processing result and a bbox regression processing result. Multi-layer convolution processing is carried out on the initial target image, and image features after convolution processing of different levels are combined to obtain the final external processed image. The last final external processed image generated by the method contains image detail information after intermediate convolution processing, multi-scale feature fusion is formed, description for the original target image is more accurate, and thus face recognition and position determination are also more accurate.

The invention relates to a positioning system based on an RFID (Radio Frequency Identification Device) dual-frequency technology. The system comprises a server, RFID tags, a plurality of RFID readers and a plurality of low frequency triggers, wherein the RFID readers are respectively connected with the server through a concentrator; each RFID reader is distributed and disposed in a positioning area; the RFID tags are bound on a positioned object body; the low frequency triggers are installed in the RFID readers; and each RFID tag includes a low frequency receiving module and a radio frequency sending module. Compared with the prior art, full-area monitoring positioning in an indoor and outdoor complex environment is realized by use of organic combination of respective radio performance of RFID low frequency and microwaves, data of RSSI (Received Signal Strength Indicator) received by the tags, characteristics of automatic cycle of a signal gain sent by a tag antenna, meshed area setting and a three-point positioning method. The system can be applied to the fields such as finance, armies, logistics storage, medical care and the like and has positive application meaning for the present era of Internet of Things.

The invention relates to a spring contact pin arrangement having a spring contact pin that comprises a pin housing in which a contact element is mounted so as to be longitudinally displaceable and is loaded by a spring device acting opposite to a displacement direction, wherein the contact element is connected to at least one first interface of the spring contact pin arrangement and protrudes from the pin housing with a contact region for electrical contacting of an electric test item. According to the invention the spring contact pin arrangement comprises a position sensor, wherein the contact element, in order to transfer the stroke thereof, is connected to a displaceable sensor element of the position sensor detecting the stroke position of the contact element.

The invention relates to an intelligent wearing equipment interface switching control method based on infrared induction and relates to the technical field of intelligent wearing equipment. One set of infrared light emitting diodes and an infrared sensor are arranged in the intelligent wearing equipment; infrared signals are emitted by the infrared light emitting diodes in real time; when a gesture action for controlling interface switching occurs, an infrared reflection signal reflected by a gesture target is detected by the infrared sensor and position data of one group of gesture targets at different time points are calculated and obtained; furthermore, an action direction of the gestures of a user is resolved by a core processor so that the switching of a display interface is controlled. An infrared induction control manner is adopted and a hole for mounting a key does not need to be formed in the surface of the equipment so that the waterproof performance of the equipment is enhanced; a touch screen for navigating a user interface does not need to be added on the surface of the equipment either so that the wrong triggering possibility is reduced; the triggering of the infrared induction is more sensitive and the operation is convenient; the problems that an existing interface switching method is not sensitive, the wrong triggering is easy to cause and the waterproof performance is poor are solved.

Aspects of the disclosure relate generally to localizing mobile devices. In one example, a first location method associated with a first accuracy value may be used to estimate a location 62, 70, 70a, 90 of the mobile device 10. A confidence circle indicative 64 of a level of confidence in the estimation of the location 62, 70, 70a, 90 is calculated. The confidence circle 64, 72, 72a, 82, 92 may be displayed on a mobile device 10. When other location methods become available, the size of the displayed confidence circle 72a may be expanded based on information from an accelerometer of the client device 10 or the accuracy of the other available location methods. This may be especially useful when the mobile device 10is transitioning between areas which are associated with different location methods that may be more or less accurate.

The invention relates to a full-automatic optical fiber head assembling machine capable of conducting insertion core assembling. The full-automatic optical fiber head assembling machine comprises a rack and a power distribution control box. The rack is provided with a rotary disc assembly, a base assembling mechanism, a spring assembling mechanism, a shell assembling mechanism, a cover sealing assembling mechanism and a discharging device, wherein the base assembling mechanism, the spring assembling mechanism, the shell assembling mechanism, the cover sealing assembling mechanism and the discharging device are matched with the rotary disc mechanism. A rotary disc rack comprises an assembling rotary disc installation base arranged on the rack, an assembling rotary disc and an assembling fixing disc which are concentric are installed on the assembling rotary disc installation base, the assembling rotary disc is matched with an assembling rotary disc motor, and assembling carriers are evenly arranged at the outer portion of the assembling rotary disc in an annular shape. An insertion core assembling mechanism is arranged between the spring assembling mechanism and the shell assemblingmechanism. By means of the full-automatic optical fiber head assembling machine capable of conducting insertion core assembling, an insertion core assembling rotary disc can be matched with an insertion core assembling part to synchronously machine the insertion core while all parts of the assembling rotary disc are used for assembling, meanwhile, unqualified products of insertion core sleeves can also be removed, in addition, the assembled insertion core and a rotary disc assembling part can be in seamless butt joint, and the overall machining efficiency of an optical fiber head is improved.

The invention provides a method for detecting pole piece folding and a platform for detecting pole piece folding. According to the method for detecting pole piece folding, a pole piece is arranged between an X-ray source and a detection device, rays irradiated by the X-ray source on the pole piece and the periphery of the pole piece are projected on the detection device and converted into visible light through the detection device, and then a detection image of the pole piece is generated. According to the method for detecting pole piece folding, the X-ray source and the detection device are adopted, the pole piece is irradiated through the X-ray source, rays are converted into visible light through the detection device, the image is generated, different states can be displayed on the folding area on the pole piece and the generated image, and thus the folding condition of the pole piece can be detected and analyzed.

The invention provides a method and a device for determining a collision risk source direction between vehicles, vehicle equipment and a vehicle. The method comprises the steps of performing interaction of position, speed and advancing direction between a current vehicle and a surrounding vehicle; acquiring a connecting line of the current vehicle and the surrounding vehicle according to the positions, speeds and advancing directions of the current vehicle and the surrounding vehicle, and calculating an angle difference between the connecting line of the current vehicle and the surrounding vehicle and the advancing direction of the current vehicle, wherein the connecting line of the current vehicle and the surrounding vehicle takes the current vehicle as the origin; dividing the surrounding 360-degree range of the current vehicle into a plurality of areas; and determining which area around the current vehicle the angle difference between the connecting line of the current vehicle and the surrounding vehicle and the advancing direction of the current vehicle belongs to, i.e., which area the collision risk source direction belongs to. By adopting the method and the device for determining the collision risk source direction between vehicles, the vehicle equipment and the vehicle, early warning of 360-degree risk source direction can be provided for the current vehicle; the efficiency of the algorithm is higher, the execution speed is higher, and the direction determination is more accurate.

The invention discloses an engineering structure damage remote monitoring and early warning method and system, and the method comprises the steps: carrying out the vulnerability analysis of an engineering structure according to the existing engineering investigation data at the early stage of the operation of the engineering structure, and arranging a vibration sensor at a vulnerable part; duringoperation, collecting a power response signal; performing frequency domain integration and wavelet packet energy spectrum analysis on the dynamic response signal, establishing a quantitative evaluation damage criterion, and judging a structural damage position and a damage degree; in the later maintenance period, establishing a quantitative visual three-dimensional structure damage image by calling the structure damage data stored in the operation period; and meanwhile, adopting a multi-layer neural network algorithm to analyze the structural damage data, predicting the remaining service lifeof the engineering structure, and when the remaining service life is smaller than a set threshold value, triggering an alarm immediately. Therefore, accurate dynamic real-time monitoring of the damagedegree of the structure and instant early warning before failure of the engineering structure are realized, and theoretical and technical guarantee is provided for operation and maintenance of the engineering structure.

The invention relates to a building construction auxiliary tool, in particular to an embedded pipe elbow pipe device. The embedded pipe elbow pipe device comprises a first elbow pipe spring, a second elbow pipe spring, a magnetism-free slide pipe, a magnetic ring and a magnet block, which can penetrate through the inner part of an embedded pipe, wherein the slide pipe sleeves the outer wall of the embedded pipe; the magnetic ring sleeves the outer surface of the slide pipe and is in sliding connection with the slide pipe; the magnet block is arranged between the first elbow pipe spring and the second elbow pipe spring; a flexible rope is arranged between the second elbow pipe spring and the slide pipe; the end part of the second elbow pipe spring is connected with a push-pull rod; and one layer of a deformed rubber block covers the outer part of the magnet block. With the adoption of the embedded pipe elbow pipe device, a traditional manner of estimating by using a mark is avoided so that the position of a turning point is more accurately determined, the embedding quality is improved and convenience is brought to a user.

The invention relates to a self-adaptive rapid dynamic positioning system and method based on an improved Boltzmann machine, and belongs to the technical field of marine rescue. The system comprises asignal generator, a Beidou satellite positioning system, an unmanned aerial vehicle base station and an unmanned aerial vehicle which are arranged on a life jacket; the Beidou satellite positioning system is connected with the unmanned aerial vehicle through the unmanned aerial vehicle base station; and the signal generator arranged on the life jacket is connected with the Beidou satellite positioning system and the unmanned aerial vehicle. According to the invention, a wrecked area is rapidly obtained through the Beidou positioning system, a marine drowning person drifting model is constructed by analyzing real-time data of sea area topography and hydrological environment of China, and then rapid locking of a search and rescue area is achieved through an LORA three-point positioning method and an improved Boltzmann machine track planning algorithm. The system has good practicability, can quickly position a person falling into water, can capture the position of the person falling intowater to the maximum extent, achieves the throwing of the positioning device, and facilitates the later quick rescue.

The invention discloses a whole-process variable displacement oil pump for pressure control, which comprises a pump main body and a solenoid valve, wherein the solenoid valve comprises an electromagnet component, a first spring, a second spring, a valve body and a valve core, wherein the upper end of the valve core is connected with an armature in the electromagnet component through the first spring; the lower end of the valve core is connected with the valve body through the second spring; a working oil port of the solenoid valve is communicated with an emission reduction chamber in the pump main body; an oil outlet of the pump main body is communicated with an oil inlet of the solenoid valve; the working oil port is communicated with an upper chamber of the valve core. After the structure is adopted, the variable of the displacement of the whole oil pump can be controlled in the whole process and can be realized by only adjusting an input current of the solenoid valve, the operation is simple and convenient and the adjusting is accurate.

The invention discloses a welding seam positioning method, device and equipment and a storage medium, and belongs to the technical field of welding. The welding image of the welded pipeline is subjected to feature extraction through the preset welding seam feature extraction model, the target welding seam feature information is obtained, the welding seam position in the welded pipeline can be effectively positioned, in addition, after positioning is completed, the target welding seam feature information is scored through the preset scoring model, and the target welding seam feature information is evaluated. And comparing the target weld joint score value with the preset score threshold value, and outputting the target weld joint feature information when the target weld joint score value is greater than the preset score threshold value, so as to ensure that more accurate position determination is performed on the weld joint position information in the welded pipeline, thereby avoiding great influence of environmental factors on a welding point in a machine welding process, and improving the welding quality. The technical problems that welding quality is affected and efficiency is not high due to the fact that welding points are difficult to position accurately in the prior art are solved, and welding quality and working efficiency of pipeline welding by a machine are improved.

The invention discloses a full-diameter rock core fracturing seam making evaluation instrument, and relates to the technical field of rock mechanics research. The instrument is compact and reasonable in structure. The formation form and the formation trend of the rock crack are detected by adopting ultrasonic waves, the formation position and the time node of the rock crack can be accurately judged, and the formation form and the formation trend of the crack in the rock can be clearly observed. Meanwhile, a high-temperature and high-pressure triaxial pressure loading mechanical structure is adopted, so that the experiment process has a three-dimensional visual effect. Compared with an existing method comprising fracturing fluid fracturing by adopting a tracer agent and anatomical verification method after an experiment, the effect is more direct, and the experiment process is clearer.

The invention discloses a pavement crack identification method based on transposed neural network interlayer feature fusion, and relates to the field of computer vision and road engineering. Accordingto the method provided by the invention, a strategy of fusing features of an intermediate layer of a classification network to optimize the segmentation result so as to compensate the receptive fieldlimitation is provided according to the information contained in the intermediate layer of the classification network and the receptive field limitation of the segmentation network. Upsampling of theintermediate layer is carried out through fractional step convolution, three independent transposed convolutional networks are constructed based on output feature maps of the three pooling layers after the classification network, and the three pooling layers are fused through layer-by-layer transposed convolution to construct a transposed convolutional network CNN-T with the three transposed convolutional layers. Results show that on the basis that the detail features of the segmentation result are basically reserved, the continuity of the crack features is perfected to a great extent by theCNN-T.

The invention relates to block bonding and combining equipment capable of accurately positioning, taking and placing a lower plate. The equipment comprises a rack; a turntable is arranged on the rack; carriers are uniformly arranged on the turntable; a lower plate discharging device, a film removing device and an upper plate discharging device which are in butt joint with the carriers are sequentially arranged on the rack in the rotating direction of the turntable; the rack is further provided with a lower plate conveying device matched with the lower plate discharging device; the lower plate conveying device comprises a lower plate conveying groove formed in the rack; a lower plate intercepting block is arranged at the tail end of the lower plate conveying groove; a lower plate clamping air cylinder perpendicular to the lower plate conveying groove is arranged on the outer side of the lower plate intercepting block; the lower plate clamping air cylinder is connected with a lower plate clamping movable block; the lower plate clamping movable block is connected with a lower plate clamping connecting rod capable of penetrating into the lower plate conveying groove; the lower plate clamping connecting rod is connected with a lower plate clamping block matched with the lower plate; and the other side wall of the lower plate clamping block and the other side wall of the lower plate conveying groove are both lower than the lower plate in the lower plate conveying groove. The precision control difficulty is reduced.