52results about How to "Realize distance measurement" patented technology

The present invention discloses a coherent laser radar system of high-resolution measurement of a remote object. The system comprises a narrow linewidth seed light source, a double parallel phase modulator, a radio frequency signal source, a fiber beam splitter, an acoustic optical modulator, a collimator, a polarized light beam splitter, a quarter-wave plate, an optical antenna, a 2*2 fiber optic combiner, a balance detector and a signal processing module. The coherent laser radar system of high-resolution measurement of remote object can perform high-resolution measurement of the distance and the speed of the remote object. The coherent laser radar system of high-resolution measurement of remote object is high in detection sensitivity, high in distance resolution, high in speed resolution, has a laser all-fiber structure and the output line polarization high peak power laser, and has a wide application prospect in the national defense and civil detection fields.

The invention discloses a shooting processing method for an unmanned aerial vehicle. The method comprises the steps: aligning a camera of the unmanned aerial vehicle with an object; recording a first reference pattern; recording a second reference pattern; synthetizing a stereo reference pattern of the object; automatically traversing the image in a whole viewing frame by a focusing frame, and comparing the image in the whole viewing frame with the stereo reference pattern when the unmanned aerial vehicle detects that a control signal is interrupted, and automatically adjusting the position of the unmanned aerial vehicle until the object is redisplayed in the viewing frame of the camera if the object is not found; presetting a reference straight line between a camera and the object, and controlling the unmanned aerial vehicle to move along the reference straight line; calculating the measurement distance between the camera and the object; and controlling the unmanned aerial vehicle to move toward the object continuously until the measurement distance is less than or equal to the reference distance if the measurement distance is greater than the preset reference distance. The shooting processing method for an unmanned aerial vehicle can improve the shooting quality when the unmanned aerial vehicle is under the loss state in the air.

The invention relates to an acoustic seabed distance measurement system. The system comprises an energy transducer, a pressure-resisting shell, an electronic cabin, watertight flanges, a watertight connector, a receiving emission module, a power supply management module, an on-duty circuit module, a work circuit module and a peripheral module. The electronic cabin is installed in the pressure-resisting shell. Two ends of an opening are installed with the watertight flanges. One watertight flange is connected to the energy transducer. The other watertight flange is connected to the watertight connector. The receiving emission module, the power supply management module, the on-duty circuit module, the work circuit module and the peripheral module are located in the electronic cabin. The energy transducer is used for carrying out conversion between an electric signal and an acoustical signal on the signal. The receiving emission module is used for receiving and emitting the signal. The power supply management module is used for managing a power supply. The on-duty circuit module is used for completing an on-duty task, cooperating with the power supply management module so as to complete a power supply management control task and transmitting a spreading distance of the measured acoustic signal between two points to a data recording device. The work circuit module is used for completing a real-time range finding task.

The invention discloses a method for continuously measuring three-dimensional coordinates of targets on the basis of fixed-focus cameras, and belongs to the technical field of monocular vision. The method includes preliminarily arranging the dot array targets at target locations; reading real-time video stream by the aid of the fixed-focus cameras, adjusting the cameras, aligning the cameras withthe dot targets and allowing all dots in the targets to enter visual fields of the cameras; computing the dots in the visual fields of the cameras, detecting the dots and computing coordinates of thedots; computing external reference matrixes of the cameras according to the obtained coordinates of the dots; computing the three-dimensional coordinates according to internal and external reference matrixes of the cameras. The method has the advantages that imaging principles are applied, the targets are introduced into monocular vision to be used as coordinate restrictions, markers convenient toidentify are set, images of the markers are accurately extracted by the aid of computers, accurate required data can be acquired, and accordingly distances can be easily and effectively measured in ahigh-precision manner.

The invention discloses a method for measuring a distance between an object and a shooting camera by utilizing a digital camera, aiming at providing a method which is simple and can be operated easily to measure the distance between the object and the shooting camera in occasions that do not need high-precision distance measurement. The method comprises the following steps: marking all groups of lenses in a digital camera lens as a1, a2, a3 to an, correspondingly marking the nearest distance values between each group of lenses and a photosensitive unit as b1, b2, b3 to bn, and marking distance values between the current position and the photosensitive unit as c1, c2, c3 to cn, and marking obtaining numerical values that respectively correspond to the lens obtained by formulas as d1,d2, d3 to dn; connecting the obtained d1,d2,d3 to dn end to end to obtain index values IDJ=d1d2d3 to dn of object distances; building a corresponding relationship between each object value uj in definite state of the lens and the index value ID of the object distance; and reading the corresponding object distance by the index values ID of the object distances.

According to the endoscope system and the method for detecting the contact between the tail end of the endoscope and the tissue, the gain and exposure time of the video stream are controlled, so thatthe current brightness of the video stream is within the target brightness range, and the distance between the tail end of the endoscope and the tissue is measured; when the distance between the tailend of the endoscope and the target tissue is smaller than a preset distance, contact early warning is sent out, contact judgment is triggered, and when it is detected that the change rate of the ratio of the current brightness to the exposure amount is smaller than a threshold value, texture feature information of the target tissue before and after the output light power is increased is extractedand compared; and whether the tail end of the endoscope is in contact with the target tissue or not is judged. According to the endoscope system, whether the tail end of the endoscope makes contact with the target tissue or not is judged by comparing the change conditions of the texture feature information of the target tissue before and after the output light power is increased, the contact prompt accuracy is improved, and damage to the tissue in the target tissue detection process by the endoscope is effectively avoided.

The invention discloses a method for measuring a distance between an object and a shooting camera by utilizing a digital camera, aiming at providing a method which is simple and can be operated easily to measure the distance between the object and the shooting camera in occasions that do not need high-precision distance measurement. The method comprises the following steps: marking all groups of lenses in a digital camera lens as a1, a2, a3 to an, correspondingly marking the nearest distance values between each group of lenses and a photosensitive unit as b1, b2, b3 to bn, and marking distance values between the current position and the photosensitive unit as c1, c2, c3 to cn, and marking obtaining numerical values that respectively correspond to the lens obtained by formulas as d1,d2, d3to dn; connecting the obtained d1,d2,d3 to dn end to end to obtain index values IDJ=d1d2d3 to dn of object distances; building a corresponding relationship between each object value uj in definite state of the lens and the index value ID of the object distance; and reading the corresponding object distance by the index values ID of the object distances.

The invention provides a comprehensive lift shaft test system, which comprises a laser test head device and a test host, the laser test head device is located in a lift shaft, the test host is locatedoutside the lift shaft, the laser test head device comprises a bracket, a base, and a laser test head, and the laser test head is mounted on the bracket or the base; and the test host comprises a power supply unit, a joystick controller, a wireless network card, a display unit, a sound card system, and an industrial computer. The comprehensive lift shaft test system executes the following measurement: (1) shaft top measurement; (2) shaft bottom measurement; (3) car testing. Without requiring the arrangement of workers in the lift shaft, the comprehensive lift shaft test system can utilize thecooperation between the laser teat head device in the lift shaft and the test host outside the lift shaft to measure the distance between the car and the lift shaft and acquire car data, judge whether requirements are met according to related national regulations and standards or not, and generate a test result.

The present disclosure discloses a portable thermal radiation sign temperature controller, method and system. The controller includes a UWB ranging module, a main control module and a housing structure, wherein the UWB ranging module and the main control module are located in the housing structure Inside, the UWB ranging module is used to measure the distance with the walking robot through wireless communication; the main control module is provided with pins, a temperature sensor interface, and a heating wire interface; The pin realizes the connection with the UWB ranging module, and is used for interacting with the UWB ranging module and supplying power; the housing structure is respectively provided with a Opening; the temperature controller has high integration, small size and light weight, which is convenient for the target person to carry around, and can realize heating temperature setting, heating wire heating sequence setting, and target distance measurement; effectively solve the target recognition accuracy rate of walking robots And the problem of low positioning accuracy.

The invention relates to a tool structure for measuring the length of a ring groove of a plunger piston part. The tool structure comprises a chassis, wherein a support is fixedly connected with the chassis, a positioning mandrel penetrates the support and is located in the support, respectively sleeved by a first lining and a second lining and located between the first lining and the second lining, and a first spring is further arranged on the positioning mandrel. Steel balls are symmetrically arranged inside the positioning mandrel, and a second spring is connected between two steel balls. The tool structure is simple in structure and quick and convenient to measure, embedding connection of the ring groove of an inner ring of a plunger sleeve is achieved by utilizing the steel balls symmetrically arranged in the positioning mandrel, positioning is quick and convenient, a measurement standard of the plunger sleeve is effectively achieved by utilizing a blocking plate, measurement of a distance between the ring groove of the plunger sleeve and the end face is achieved, the time and labor are saved, the measurement efficiency is greatly improved, and the enterprise cost is saved.