46results about How to "Precise navigation and positioning" patented technology

The invention belongs to the technical field of multi-sensor fusion positioning navigation, particularly relates to a vehicle turning track two-way calculation method, system and device, aiming to solve the problem of low track calculation precision before vehicle turning in the prior art. The vehicle turning track two-way calculation method comprises the steps: acquiring picture feature points and sensor measurement values, and storing and updating a sliding window; carrying out system initialization; when the new image is added into the sliding window, optimizing parameters such as sensor pose and the like until the vehicle turns around; when the new image is added into the sliding window, optimizing parameters such as the pose and offset of the sensor until the offset estimated value ofthe accelerometer converges; when the new image is added into the sliding window, optimizing all parameters; and opening up a reverse calculation thread, and calculating a track before turning according to a time sequence from back to front from the current position. According to the vehicle turning track two-way calculation method, track optimization after turning is carried out multiple times through the forward thread, and the reverse thread is opened up to calculate the track before turning, and the high-precision track before and after turning can be obtained, and accurate positioning and navigation without GPS can be achieved.

The invention discloses an accurate-positioning navigation system of an autonomous mobile device. The accurate-positioning navigation system is characterized by comprising an RFID (Radio Frequency Identification Device) and infrared transmitting device and an RFID and infrared receiving device, wherein the RFID and infrared receiving device is arranged in the autonomous mobile device, the RFID and infrared transmitting device is arranged at a positioning point, and the distance between the RFID and infrared transmitting device and the RFID and infrared receiving device is less than 200m. According to the invention, the defects that the positioning distance of the traditional single infrared device is small and the positioning is not easy to be processed are remedied; and due to the integration of the RFID and infrared rays, the quick and accurate positioning can be carried out, and the accurate-positioning navigation system of the autonomous mobile device, disclosed by the invention, has the advantages of simple structure, accurate data, high processing speed, low requirement on a hardware, low cost, high reliability as a rotating component is free and capability of ensuring the free motion and accurate positioning and navigation of the autonomous mobile device within a covered range.

The invention discloses an indoor positioning navigation method based on image space and panorama assistance. The method includes the steps: laying control points, and constructing a world coordinatesystem; secondly, correcting a camera, and acquiring indoor sequence images; thirdly, extracting and matching characteristic points; fourthly, eliminating the characteristic points; fifthly, calculating characteristic point space coordinates; sixthly, acquiring indoor panorama images; seventhly, indoor positioning; eighthly, indoor navigating. The method is simple in steps, reasonable in design, good in use effect, low in cost and high in practicability, positioning and navigation are accurate, auxiliary devices are decreased, and positioning accuracy is improved.

The invention belongs to the technical field of vehicle locating and navigating which aims at locating and navigating for vehicle smooth trip and providing reference data for anti-collision and automatic drive of vehicles. The invention adopts the technical schemes that a locating navigating guide is arranged on the road every a plurality of meters; a guide locating avigraph is arranged on the vehicle; the locating navigating guide is communicated and contacted with the guide locating avigraph through wireless. Neighboring locating navigating guides are kept to be contacted with each other in relay communication. All the locating navigating guides are contacted with a locating navigating guide management station; the vehicle tells the trip destination to the locating navigating guide management station through the locating avigraph and the locating navigating guide; the locating navigating guide management station designs out a best traffic line for vehicles, and locates as well as navigates for vehicles through the locating navigating guide and the locating avigraph. The invention is applied to the locating, monitoring and navigating of the vehicles.

The invention provides a positioning and navigation method, a positioning and navigation device and a storage medium, wherein the method comprises the following steps: performing primary positioning for a target carrier in a monitoring range, calculating motion information of the target carrier under a geographic coordinate system, and converting the motion information into the motion informationunder a world coordinate system, obtaining the current position coordinate and speed of the target carrier according to the converted motion information, obtaining motion trail according to the current position coordinate and the speed, acquiring beacon position information of a beacon preset in the monitoring range, obtaining relative position data between the target carrier and the beacon according to the beacon position information and the current position coordinate of the target carrier, and regulating the motion trail of the target carrier according to the relative position data. According to the method and the device provided by the invention, the current position coordinate, the speed and the motion trail of the target carrier in the geographic coordinate system are obtained through calculation of the motion information of the target carrier, the motion trail of the target carrier is regulated according to the relative position of the target carrier and the beacon, and thus, positioning and navigation of the target carrier can be more accurate.

The invention discloses an Internet of Things remote control vehicle navigation integrated machine which comprises a main controller arranged in a housing, and an audio module, a negative ion generating module, a display module, a navigation module, a power supply module, a remote control module, a wireless communication module and a GSM module which are connected with the respectively main controller. The Internet of Things remote control vehicle navigation integrated machine disclosed by the invention is precise in navigation and positioning, capable of generating negative ions to reduce fatigue of a driver, preventing theft, achieving remote control, detecting real-time vehicle faults, and exchanging data with a remote external device mutually, so that the machine has the wide market value and application prospect.

The invention discloses detection equipment and an optical detection method. The detection equipment comprises a functional outer box, a damping rack, a platform module and an optical detection device. The platform module comprises a transferring device and an air floating platform. The transferring device is arranged on the air floating platform in a crossing mode so as to transfer a to-be-detected piece between the feeding port and the detection station. The optical detection device comprises a main detection camera assembly, a redetection camera assembly and a positioning camera assembly. The optical detection method comprises the steps of feeding and initial positioning, to-be-detected piece feeding, detection positioning, map matching and initial detection, re-detection to obtain a detection result, detection completion and material returning. According to the equipment, the detection method is executed through the main detection camera assembly, the redetection camera assembly and the positioning camera assembly, positioning, initial detection and redetection of to-be-detected pieces of different specifications are achieved, positioning and navigation are accurate, the vibration absorption performance of the rack is good, the equipment cost is low, the detection efficiency and precision are high, the function integration degree of the whole machine is improved, and the whole machine is low in fault rate and convenient to maintain.

The invention relates to a method for calculating coordinates of an intersection point D of an optical axis and a celestial surface based on a star sensor. The method comprises the steps of establishing a space rectangular coordinate system under a celestial coordinate system, performing translation or rotation transformation on the space rectangular coordinate system to enable the space rectangular coordinate system to coincide with a star sensor coordinate system to obtain a transformation relationship between the two coordinate systems, and representing a coordinate expression of the pointD in the celestial coordinate system by using each parameter; obtaining the relationship among the coordinates according to the cosine law, and obtaining an approximate expression of the distance f from the projection center to the projection point on the star sensor light-sensitive surface by using a Taylor expansion formula; substituting the approximate expression into the coordinate expressionof the point D in the celestial coordinate system to obtain a celestial coordinate approximate value expression of the point D; performing error analysis in combination with a median theorem, and obtaining a fixed star selection standard to further improve the coordinate precision of the point D. The invention aims to establish a mathematical model, solve the coordinates of the intersection pointD of the optical axis and the celestial surface, enables coordinates of the point D to be accurate through an optimization algorithm, and improve the attitude measurement precision of the star sensor.

The invention discloses a WiFi-based indoor positioning and navigation method for large-scale shopping malls. Firstly, a mobile terminal with an AP signal scanner scans the AP signals of wifi tags around to obtain the MAC address of the scanned AP signal; The intensity of the signal is sampled and measured to obtain measurement data; calculate the positions of all scanned Wifi tags according to the MAC address of the AP signal scanned in step 1 and the measurement data in step 2, and then use the positioning algorithm to locate. The specific process is: Estimation The location of the Wifi tag of the next location that the mobile terminal will arrive at; predict the location of the Wifi tag of the next location that the mobile terminal will arrive at; and then perform positioning according to the estimated location and the predicted location. The present invention dynamically predicts node positions, filters out RPs with no similar RSS vector at the label from the map to find the nearest neighbor, reduces the time and calculation complexity of the KNN algorithm, and greatly improves the positioning accuracy.

The invention relates to a method for calculating coordinates of an intersection point D of an optical axis and a celestial surface based on a star sensor. The method comprises the steps of establishing a space rectangular coordinate system under a celestial coordinate system, performing translation or rotation transformation on the space rectangular coordinate system to enable the space rectangular coordinate system to coincide with a star sensor coordinate system to obtain a transformation relationship between the two coordinate systems, and representing a coordinate expression of the pointD in the celestial coordinate system by using each parameter; obtaining the relationship among the coordinates according to the cosine law, and obtaining an approximate expression of the distance f from the projection center to the projection point on the star sensor light-sensitive surface by using a Taylor expansion formula; substituting the approximate expression into the coordinate expressionof the point D in the celestial coordinate system to obtain a celestial coordinate approximate value expression of the point D; performing error analysis in combination with a median theorem, and obtaining a fixed star selection standard to further improve the coordinate precision of the point D. The invention aims to establish a mathematical model, solve the coordinates of the intersection pointD of the optical axis and the celestial surface, enables coordinates of the point D to be accurate through an optimization algorithm, and improve the attitude measurement precision of the star sensor.