2947 results about "Distance detection" patented technology

A system and method are presented for improving the performance of full range code scanners. A distance detection module determines the distance of the code symbol from the code symbol reader. In response to the detected distance, the sweep angle of the scanning element is changed to ensure that the code symbol is within the code symbol reader's field of view. The sweep angle is larger when the code symbol is in the near range, and smaller when the code symbol is in the far range.

A vehicle backup monitoring and alarm system which comprises a system of three closed circuit video cameras, three laser-based distance detection systems and an associated monitor is disclosed. A camera and a laser-based distance detection system are mounted on each side, as well as the rear of the motor vehicle or large truck, and coupled to one monitor, located by the driver, which displays all three images simultaneously. The distance to the closest object, displayed by each camera, as determined by the laser-based distance detection system, is superimposed over the respective object in the monitor. If any of these said distances fall below a minimum predetermined distance, the numeric representation will flash and an audible alarm will sound.

A hand pattern switch device recognizes a hand pattern from an image of a hand in an image pickup zone and detects a hand motion. One of controlled objects is selected based on the recognized hand pattern and / or hand motion. In accordance with the selected object, a mode of detection of operation information based on hand motion is changed. In a moved distance detecting mode, a moved distance of the hand in the zone is detected as operation information, and in a stop time detecting mode, a stop time of the hand at a stop position to which the hand has been moved in the zone is detected as operation information. The image pickup zone is at a location which is located laterally to a steering wheel and to which a driver can extend his / her arm without changing a driving posture.

A distance measuring and display system for use on a vehicle having a mirror assembly thereon comprises at least one front distance measuring sensor for measuring the distance to an obstacle in front of the vehicle, at least one rear distance measuring sensor for measuring the distance to an obstacle to the rear of the vehicle, and a display coupled to the front distance measuring sensor and to the rear distance measuring sensor for displaying a distance and an indication of whether it is a front distance or a rear distance.

A display apparatus includes a display unit displaying information on a display screen, a distance detector detecting a distance from the display screen to the face of an operator, and a controller causing the information to be enlarged and reduced on the display screen in response to a change of the detected distance.

The present invention is an inexpensive, hand-held, and easy to operate millimeter-wave detection device that employs a non-imaging sensor which radiates a pulse of millimeter waves of a certain amplitude and frequency towards a target located at a distance from the detection device. The sensor receives pulses of millimeter waves that are reflected from the target and generates a voltage waveform that is characteristic mainly of the target material, while other parameters such as distance to the target are known. The processor of the detection device measures both the peak voltage and the rate of increase of the voltage until it reaches the maximum. Using an algorithm stored in a software module, the deviation between the rate of the voltage rise and the peak voltage is compared with values of similar parameters for a number of test targets made of different materials that were previously collected and stored in a calibration table in the memory of the device. A concealed object, e.g. a weapon, is positively identified when the measured voltage rise is found to be similar to one of the stored voltage rises. The circuitry of the detection device generates a visual and / or audio output to a display device which is indicative to the operator as to whether a concealed object is present and, if a match is found with the data in the calibration table, the nature of the concealed object is also displayed. In addition to the basic mode of operation described, various other operation modes can be employed with the detection device of the invention.

A learning marker configured such that one of learning horizontal distance information and learning vertical distance information can be learned based on detection information from a horizontal travel distance detection device or a vertical travel distance detection device upon detection of at least one edge section of the learning marker in one direction of a horizontal travel direction and a vertical travel direction of a transfer means by a learning marker detector for detecting the learning marker, and the other of the learning horizontal distance information and learning vertical distance information can be learned based on detection information from the horizontal travel distance detection device or the vertical travel distance detection device upon detection of each of both edge sections of the learning marker in the one direction by the learning marker detector.

A vibration model storage unit stores a vibration model which is made up of an unsprung part, a sprung part, a damper, a tire and a suspension spring, an actual relative distance detection unit detects an actual relative distance of the unsprung part to the sprung part, and a deviation calculation unit calculates a deviation between an estimated relative distance of the unsprung part to the sprung part that is estimated by the vibration model and the actual relative distance. An input parameter calculation unit calculates an input parameter that is inputted into the vibration model from a road surface based on the deviation calculated by the deviation calculation unit, and a vehicle state quantity calculation unit calculates a quantity of state of a vehicle by applying the input parameter to the vibration model.

The invention belongs to the field of mobile communication terminals and discloses an automated communication switching method and equipment among multiple mobile communication terminals of the same user. The user has portable equipment like a watch phone and further has another large-screen smart phone. When the phones are located remotely and are not located on the same place, the smart phone can automatically switch received communication to the watch phone, and meanwhile calling, launched by the watch phone, on other users is automatically switched. According to the automated communication switching method, automated communication switching can be achieved through the smart phone only through distance detection between the smart phone and the watch phone, and participation of a communication network is not needed. The user can conceal phone numbers of the watch phone and use phone numbers of the smart phone only in the process of communication service, so the user can have unique mobile user identification, and the mobile communication terminals can be used more flexibly and more conveniently.

An information display system has display unit having a display screen, a control unit for controlling the displayed information, and an input devices for inputting a user's control command. The input devices may be a distance detecting sensor adapted to detect the position of a user controlled object in a sensing field arranged at a given distance in front of the screen. The control unit is adapted to determine a display control command based on the detected object position.

A hand-supportable Digital Imaging-Based Bar Code Symbol Reading Device comprises: an IR-based Object Presence and Range Detection Subsystem; a Multi-Mode Area-type Image Formation and Detection Subsystem having narrow-area and wide area image capture modes of operation; a Multi-Mode LED-based Illumination Subsystem having narrow-area and wide area illumination modes of operation; an Automatic Light Exposure Measurement and Illumination Control Subsystem; an Image Capturing and Buffering Subsystem; a Multi-Mode Image-Processing Bar Code Symbol Reading Subsystem; an Input / Output Subsystem; a manually-activatable trigger switch; a System Mode Configuration Parameter Table; and a System Control Subsystem integrated with each of the above-described subsystems. The bar code reading device can be configured and operated in numerous programmable modes of system operation to automatically read 1D and 2D bar code symbologies in a high-speed manner using advanced modes of image processing on captured images.

A heater for changing a projection distance protrusion value by thermal expansion accompanying electric-power-distributed heating is provided in a head having at least a reading element. At desired correction timing, a changed distance detection unit measures a clearance changed distance in a state in which the head is positioned to a track on the recording medium while increasing the amount of electric power distributed to the heater. A contact determination unit determines that the head is brought into contact with the recording medium when a derivative value of the clearance changed distance is below a predetermined threshold value. A measurement output unit outputs the clearance changed distance detected by the changed distance detection unit at the time of contact determination of the contact determination unit as a measurement result of the clearance between the reading element and the recording medium.

A proximity detector employs a capacitive sensor, having: at least one detection antenna including numerous capacitive proximity sensors which each include a measuring electrode, the antenna being positioned close to an object or body; electronic elements for exciting the electrodes and processing the distance measurement signals originating from the capacitive sensors; and digital elements of controlling the electronic elements and of calculating the distances between the electrodes and the body or object using the processed measurement signals. The detection antenna also contains a single guard for all of the measuring electrodes. Moreover, the electronic elements have, for each detection antenna, a floating or floating excitation capacitive bridge which co-operates with polling elements in order sequentially to measure the respective capacitances between each electrode and the object or body to be measured.

A hand-supportable digital imaging-based bar code symbol reading device comprises: an automatic object presence and range detection subsystem; an area-type image formation and detection subsystem having a CMOS area-type image detection array, and narrow-area and wide area image capture modes of operation; an LED-based illumination subsystem having LED arrays, and narrow-area and wide area illumination modes of operation; an automatic light exposure measurement and illumination control subsystem; an image capturing and buffering subsystem; and an image-processing bar code symbol reading subsystem. The LED arrays associated with the LED-based illumination subsystem are automatically driven in a precise manner to globally expose the CMOS area-type image detection array with LED-based illumination only when substantially all of its rows of pixels are in a state of integration and have a common integration time, thereby enabling the image capturing and buffering subsystem to capture high quality images independent of the relative motion between the hand-supportable digital imaging-based bar code symbol reading device and the object.

The invention discloses a three-dimension laser sensor and two-dimension laser sensor combined calibration method. Distance measuring mutation characteristics produced when two-dimension laser is used for scanning a calibration plate with clearance in the middle. Mapping relevance between a data matrix of a straight line, where the clearance is located, in a laser sensor local coordinate system and a data matrix of the straight line, where the clearance is located, in an unmanned intelligent cart coordinate system is utilized to rectify rotating gestures of laser sensors. On the basis of the rectification, point cloud data of a protruding rectangular object in a level scene is further extracted, and horizontal moving rectification is conducted according to an ICP iterative optimization algorithm. Consequently, combined calibration of a three-dimension laser distance detection sensor and a plurality of two-dimension laser distance detection sensors is achieved.

The invention provides a power transmission line intelligent inspection system based on LiDAR and further provides a power transmission line intelligent inspection method based on LiDAR. The power transmission line intelligent inspection system comprises a three-dimensional quantifying information acquiring unit, a three-dimensional rebuilding unit and an intelligent inspection analysis unit. The three-dimensional quantifying information acquiring unit is suitable for acquiring power transmission equipment actual space three-dimensional quantifying information and power transmission line peripheral environment ground feature three-dimensional quantifying information, namely, point cloud data provided by LiDAR; the three-dimensional rebuilding unit is suitable for three-dimensional rebuilding of a power transmission line body and a corridor based on power transmission equipment actual space three-dimensional quantifying distribution information and power transmission line peripheral environment ground feature actual three-dimensional quantifying information; the intelligent inspection analysis unit is suitable for carrying out safety distance detection based on three-dimensional rebuilding results, carrying out safety distance analysis according to safety distance detection results and power transmission line safety standards and pointing out power transmission lines not catering to the safety standards or giving an alarm about the power transmission lines not catering to the safety standards. By means of the power transmission line intelligent inspection system and the power transmission line intelligent inspection method, requirements for line inspection data and function digitalization, standardization and visualization are achieved.

The invention discloses a comprehensive geological prediction method for karst tunnel construction, which includes the following steps: (1) long-distance detection; (2) geological radar detection: on the basis of the long-distance detection, adopting a geological radar to review a long-distance prediction result within a short-distance detection range; (3) adopting a horizontal protruded drill hole to carry out direct detection according to a review result; and (4) supplementary protruded blasthole detection: when a direct detection result is that a geologically abnormal body exists in the current tunneling construction area, a protruded blasthole needs to be adopted to carry out supplementary detection, and a supplementary detection result is used as supplementary detection data for the direct horizontal protruded drill hole detection result. The design of the comprehensive geological prediction method is rational, the comprehensive geological prediction method is easy and convenient to operate, and is highly operable, moreover, the mutual relation among a variety of chosen prediction methods is clear, the comprehensive detection effect is good, and the invention provides a systematic, rational and standard comprehensive prediction method for karst tunnel construction.

The invention discloses an ultrasonic distance detection-based unmanned aerial vehicle obstacle avoidance system and a control method thereof. The unmanned aerial vehicle obstacle avoidance system includes a flight control module, an airborne radio frequency communication module, an ultrasonic ranging module and an autonomous obstacle avoidance module, wherein the flight control module is used for controlling the flight of an unmanned aerial vehicle and feeding back the flight condition of the unmanned aerial vehicle to a ground station, the ultrasonic ranging module is used for detecting whether obstacles exist before, above and below the unmanned aerial vehicle as well as at the left and the right of the unmanned aerial vehicle, and detecting the distances between the unmanned aerial vehicle and the obstacles, and the autonomous obstacle avoidance module is used for controlling the unmanned aerial vehicle to perform obstacle avoidance according to measurement results of the ultrasonic ranging module. With the control method of the unmanned aerial vehicle obstacle avoidance system adopted, the unmanned aerial vehicle can autonomously avoid the obstacles, and the avoidance modes of the unmanned aerial vehicle can be more diverse, and the unmanned aerial vehicle can automatically adjust flight routes and accomplish specified flight tasks. The ultrasonic distance detection-based unmanned aerial vehicle obstacle avoidance system of the invention has the advantages of simple structure, convenient use and high practical value.

A display system for improving visual comfort and a method of adaptively adjusting resolution of a display device are provided. The display system includes a display device, a memory, an image sensor, a face recognition unit, a distance detection unit, and a controller. The memory is configured to store face representation data and user preference data. The image sensor is positioned with respect to the display device for capturing an image and converting the image into an electrical signal. The face recognition unit is configured to analyze the electrical signal to recognize a face image of a user and comparing the recognized face image with the face representation data to generate a first signal. The distance detection unit is configured to analyze the electrical signal to determine a distance between the display device and the user to generate a second signal. The controller, which is electrically connected to the face recognition unit and the distance detection unit, can generate a parameter based on the first signal and the second signal and adjust a display resolution of the display device based on the parameter.

A non-contact information input device is provided that can easily and reliably use simple image processing to input information indicated by the shape of a user's hand. The non-contact information input device is configured to detect a user's hand using an imaging section, and to select an operation mode based on a shape of the hand. Then, a distance detecting section of the non-contact information input device is configured to detect a distance from the hand to the imaging section and adjust a parameter used in the operation mode in response to the distance if the parameter is adjustable. Thus, the image processing load is reduced and the parameter is easily and reliably adjusted by adjusting the parameter in the selected operation mode based on the distance detected by the distance detecting section.

The invention discloses an automobile driving assistance system and a control method. The automobile driving assistance system comprises an information acquisition module and an information fusion processor, wherein the information acquisition module comprises a front camera, a front radar and an ultrasonic radar; the information fusion processor is electrically connected with the information acquisition module; and the information fusion processor reads the information of the information acquisition module, performs information fusion processing and outputs a vehicle brake control signal, a speed and distance control signal and a driving track control signal. The front camera comprises an image recognition algorithm module, a light source recognition algorithm module and a lane line recognition algorithm module. The front radar comprises a front obstacle detection module and a front medium-long vehicle distance detection module. The ultrasonic radar comprises a surrounding vehicle distance detection module and a front near vehicle distance detection module.

The invention discloses a chair capable of automatically rectifying sitting posture, and also discloses an application method of the chair capable of automatically rectifying sitting posture. Through at least two distance detection sensors arranged at a backrest, detection on inclined angle of a back of a human body is realized; through a pressure sensor, detection on motion states of legs of the human body is realized; through cooperation of the pressure sensor and the distance detection sensors, whether the human body is on the sitting surface of the chair is determined; through a lifting mechanism with lock-up capability, adjustment for the chair height is realized; through a rotation mechanism with lock-up capability and an inclined-angle sensor, adjustment for the horizontal angle of the sitting surface; and through cooperation with a minisize processor, automatic adjustment on the sitting-surface height and the horizontal angle is realized. Therefore, the chair helps to guarantee a human body to always have correct sitting posture and guarantee body health.

On the basis of headway distance information issued from a headway distance detecting device for detecting a headway distance between a controlled vehicle and a preceding vehicle and terrain shape information issued from a terrain shape estimating device for estimating a terrain shape around the position of the controlled vehicle, a terrain shape at a position spaced from the position of the controlled vehicle by the headway distance is detected, and the speed of the controlled vehicle is controlled according to the terrain shape information.

A legged robot includes: a body; a leg portion; a foot portion; a falling direction detection unit that detects a falling direction of the body; a control unit; and a distance detection unit that detects a distance between a sole of the foot portion and a road surface. The distance detection unit includes at least three distance sensors provided on the sole, and the control unit includes distance sensor selecting means for selecting a distance sensor and gait data correcting means for correcting gait data based on a detection signal from the distance sensor selected by the distance sensor selecting means. The distance sensor selecting means selects three distance sensors among the distance sensors based on a detection result of the falling direction detection unit.

The invention provides an intelligent television regulating system and a television regulating method thereof. User habits of each viewer are trained by a training module; by an image processing module, the viewers and viewing distances thereof are analyzed and the user habits of the training module are updated; and by a regulating module, a television is regulated to the most suitable viewing mode; and a distance detection technology and a face identification technology are applied to dynamically, flexibly and intelligently regulate the television; and furthermore, the viewer is prevented from watching TV (television) at a short distance by utilizing a prompt module.

The invention discloses a system for real-time identifying urban traffic lights based on single eye vision and a GPS integrated navigation system. The system establishes a map of traffic lights in an off-line manner through the methods of interactive image annotation, camera calibration, 3D position recovery, etc., and provides position coordinates and semantic attributes of the traffic lights under the globally positioned GPS coordinate system. Upon online detection, with the established offline map of traffic lights as a prior, an area of interest is determined by solving the substantial scope of the traffic lights in images in combination with the pose position, and the identification of the color segmentation and shapes of the traffic lights are carried out by using form information of the traffic lights in the area of interest. The system is applicable to road conditions and scenarios of different kinds, implements stable and long-distance detection sensing of the traffic lights under various environments. Since the system adopts a low-cost and low-power consumption navigation device, an image acquisition device and a computer platform, the system can be widely applied to the fields of vision navigation of driverless vehicles, vision auxiliary driving of intelligent vehicles, etc.

An image display apparatus includes a subject distance detection portion which detects a subject distance of each subject whose image is taken by an image taking portion, an output image generating portion which generates an image in which a subject positioned within a specific distance range is in focus as an output image from an input image taken by the image taking portion, and a display controller which extracts an in-focus region that is an image region in the output image in which region the subject positioned within the specific distance range appears based on a result of the detection by the subject distance detection portion, and controls a display portion to display a display image based on the output image so that the in-focus region can be visually distinguished.

The 3D active real-time positioning system based on binocular vision and laser ranging consists of three parts of vision processing subsystem, control subsystem and mechanical mechanism. The target image the video camera under the control of image acquisition card obtains is processed in the vision processing computer to obtain the 2D position information in image coordinate sent to the public memory area. Then, the control computer obtains the position information from the public memory area, performs coordinate conversion and real-time programming, outputs via D / A converter board to the driver to drive the motor and controls the laser via the angle encoder feedback loop to irradiate the target accurately. Finally, the depth information the range finder measures is fed back to the vision computer to obtain the 3D position information of the target. The system has the advantages of high distance precision, high activity, high real-time performance, low cost, etc.