6results about How to "Broaden your match" patented technology

The invention discloses a laser positioning system and method based on a point cloud map. The laser positioning system comprises a map point cloud generation module, a track plotting module, a laser initial positioning state estimation module, a laser matching module, a laser positioning state monitoring module and a laser repositioning module. According to the method, laser matching positioning is carried out based on the point cloud map, the matching target is map point cloud, and compared with inter-frame matching, accumulated errors of laser positioning can be reduced; the track plotting is carried out based on the IMU and the wheel speed meter, when the laser positioning state is normal, the track plotting result is corrected, and the accuracy of state estimation is improved; on the basis of IMU, a wheel speed meter and laser point cloud data, multiple input sources are provided for laser initial motion state estimation and repositioning state estimation, a state estimation result is output based on input source state decision, the estimation result can still be output under the condition that part of sensors or methods fail, the laser positioning stability is improved, and the application range is widened.

The utility model provides an intelligent air switch control circuit with wide AC voltage input, which comprises a voltage reduction and current stabilization circuit, a switching power supply circuit, an MCU circuit, an RS485 transceiver circuit, a motor control circuit and a communication interface, and is characterized in that a mains supply is connected with the input end of the voltage reduction and current stabilization circuit, and the output end of the voltage reduction and current stabilization circuit is connected with the input end of the switching power supply circuit; the switching power supply circuit is connected with the sampling differential circuit, the MCU circuit, the motor control circuit and the RS485 transceiver circuit, one output end of the MCU circuit is connected with the input end of the motor control circuit, the MCU circuit is in bidirectional connection with the RS485 transceiver circuit, the input end of the RS485 transceiver circuit is connected with the communication interface, the voltage reduction and current stabilization circuit is arranged to reduce AC 80V-AC 500V power to below AC 310V, the structure is simple, and the cost is low. The circuit voltage matching range is greatly improved, the air switch voltage requirement is met, the phenomenon that the circuit is burnt by double live wires is prevented, and the service life is long.

The application discloses a user cold start recommendation system and method based on similarity matching, constructs a knowledge graph database according to users, products and the interaction relationship between the users and the products, and carries out standardization processing. The processed data is extracted to score information and mapped to a user like-dislike type space, so that the like-dislike product type of each user is determined, and a similarity matching algorithm is designed to find the old user with the highest similarity to the new user. The old user product type score vector and the new user product type vector score are processed by an association function and used as the recommendation basis of the system, the reasonable expansion of the new user data is completed, and the cold start problem of the recommendation system is effectively alleviated. The application solves the user cold start problem caused by the introduction of a new user into an industrial recommendation system. The application can be used for the scene of effectively recommending the product types that meet the preferences of new users in the industrial recommendation system.

The invention discloses a micro-mechanical impedance matching network tuner with a defected ground structure based on an SOI substrate and a manufacturing method of the micro-mechanical impedance matching network tuner. SOI is adopted as the substrate of a tuner device, loss can be effectively reduced, device structures are sequentially and symmetrically arranged on the two sides of a signal line, one end is a signal input end, and the other end is a signal output end; six high-resistance bias pads are arranged at the two ends of the device respectively, two transmission lines are symmetrically arranged on the two sides of a signal line, two DGS structures are arranged on the signal line, an MEMS bridge is arranged on the transmission lines and connected with the signal line in parallel through a wire, and variable capacitance and effective medium value are achieved through switching of the MEMS bridge so that variable impedance can be achieved. The two DGS structures on the signal line enable the structure to be compact and the impedance to be adjusted.

A real-time multi-dimensional imaging adaptive adjustment system and method based on deep learning, belonging to the field of optoelectronic imaging technology, in order to solve the image field difference caused by the camera acquisition orientation difference after multi-dimensional image acquisition in the prior art, the method of manually adjusting the camera orientation to reduce the error has the problems of large workload and large error that cannot be controlled, the system includes an optical imaging system, an image information processing unit, and a pan-tilt control system, wherein the optical imaging system and the image information processing unit are placed together on the pan-tilt control system; the optical imaging system and the image information processing unit are electrically connected, and the image information processing unit and the pan-tilt control system are electrically connected; the image information processing unit mainly performs image processing on the optical imaging system, obtains the coordinate offset information of the image after processing, transmits the coordinate offset information to the pan-tilt control system, and then performs the next step of system adjustment. The automatic adjustment system of the present invention can improve work efficiency.

The present invention discloses a current prediction deadbeat average model control method for a phase-shifted full-bridge converter. The control method combines oversampling technology to convert the current loop controlled object from a single-point sampling inductor current to the average value of the inductor current. The next beat control quantity is calculated by predicting the current value of the current cycle, thereby reducing the influence of the lagging one-beat control and improving the dynamic performance of the controller. The proposed method effectively improves the contradiction between the stability and dynamic performance of the DC / DC converter control system, thereby improving the overall stability and reliability of the modular multi-level digital power amplifier system. In addition, pulse feedforward control is introduced to address the problem of duty cycle loss of the phase-shifted full-bridge converter, which not only improves the steady-state tracking performance of the deadbeat control of the phase-shifted full-bridge converter, but also further improves the dynamic performance of the system and expands the matching range of the output inductor parameters.