71results about How to "Extended distance range" patented technology

The purpose of the present invention is to realize a compact three-dimensional measurement device of high resolution. In the present invention, a pulse light is projected on an object, the light reflected from the object is received by a solid state area sensor having a plurality of photoelectric conversion elements, the area sensor is controlled with a timing synchronized with the projection of the pulse light, and the distance to each photoelectric conversion element is measured based on the output of the solid state area sensor.

The invention relates to an accurate simulation device and method of a radar target distance for a linear frequency modulation signal. The accurate simulation device is composed of a down conversion unit, an intermediate-frequency amplification unit and a delay unit. The down conversion unit is formed by a millimeter-wave down converter module and is used for converting a received millimeter-waveradar signal into an intermediate-frequency signal for post-stage processing. The intermediate-frequency amplification unit consists of a PXI bus programmable amplifier module and is used for amplifying an intermediate frequency signal amplitude after down conversion and carrying out adjustment based on different gain needs. The delay unit is composed of a baseband generating module, an I/Q modulator, and a power control module and is used for modulating a baseband signal to a carrier signal and carrying out amplitude control on the modulated signal. The baseband signal is used as the modulation signal, the received radar linear frequency modulation signal is used as the carrier signal for frequency modulation, and the frequency information set by the baseband signal reflects the distanceof the target. The method is implemented based on the idea of frequency modulation; and simulation of the radar target distance is realized.

Systems and methods for extending the range of a fiber optic DTS system are provided. In one respect, a method may provide steps for transmitting, in a first time period, an optical signal at a first energy level through an optical fiber, collecting backscatter signals as a result of the first transmission, adjusting the first energy level to a second energy level, transmitting, in an additional time period, the adjusted optical signal through the optical fiber, collecting backscatter signals as a result of the adjusted transmissions, and using a portion of the collected backscatter as a result of the first transmission and a portion of the collected backscatter as a result of the additional transmissions, determining one or more parameter profiles, such as a temperature profile.

The invention discloses a dual-path camera anti-shaking system for an engine room of a wind-driven generator, belongs to the technical field of wind power generation devices, and aims to solve the problem, which cannot be solved by existing inventions and technologies, of complex, changeable and unpredictable shakes of a fan. The shaking condition of a camera and mobile robot vision system is relatively simple, so that simple shake problems can be solved by an existing anti-shaking device for the camera and mobile robot vision system only. According to the dual-path camera anti-shaking system, a multi-sensor fusion technology and collaborative control over multiple paths of motors are adopted, and the shaking direction and distance can be detected and returned in real time to calculate an optimal path for compensation and correction; moreover, a conventional PID (proportion integration differentiation) control algorithm is not adopted by the invention, and instead, a model-free self-adaptive control algorithm is adopted to implement collaborative control over the multiple paths of motors to fulfill the aims of real-time detection, accurate control, rapid correction and video anti-shaking.

A display device includes a display panel and a shutter panel that is provided on the viewer side of the display panel and includes a first liquid crystal element and a second liquid crystal element adjacent to each other. In a first display state, a first light-shielding region and a first light-transmitting region are formed in the shutter panel by the first liquid crystal element, and light from the display panel is emitted through the first light-transmitting region. In a second display state, a second light-shielding region larger than the first light-shielding region and a second light-transmitting region smaller than the first light-transmitting region are formed in the shutter panel by the first liquid crystal element and the second liquid crystal element, and light from the display panel is emitted through the second light-transmitting region.

A radar apparatus transmits a high-frequency transmission signal, and receives a signal of a reflective wave reflected by a target. Given a first code sequence of a first code length, a second code sequence of a second code length which is longer than the first code sequence, and a third code sequence obtained by inverting each code of the first code sequence, a first transmission signal obtained by modulating the first code sequence, a second transmission signal obtained by modulating the second code sequence, a third transmission signal obtained by modulating the third code sequence and a fourth transmission signal obtained by modulating the second code sequence are generated in a first transmission period, a second transmission period, a third transmission period and a fourth transmission period respectively.

A device for retrieving data from radio frequency identification (RFID) tags is disclosed. The device includes a mobile base, a robotic arm, and a data reading device. The robotic arm is attached to the mobile base. The data reading device employed to collect the data of electric tags is attached to the end of the robotic arm. A device for retrieving data from an RFID tag arrives at the position, where the electric tag is, by moving the mobile base and adjusting the height of the robotic arm. The movement is controlled according to the position and the height of the electric tag. Finally, the data reading device reads the data stored in the electric tag.

The invention discloses a shaft furnace-electric arc furnace direct reduced iron continuous hot-feeding device. The shaft furnace-electric arc furnace direct reduced iron continuous hot-feeding device comprises a shaft furnace discharge device, an electric arc furnace, a buffer weighing warehouse arranged at an outlet of the shaft furnace discharge device, and a small-dip angle conveying device which is arranged between an outlet of the buffer weighing warehouse and an inlet of the electric arc furnace and is used for conveying a material. The small-dip angle conveying device comprises a feeder, a small-dip angle conveying pipe, a movable elephant trunk and a fixed elephant trunk. The feeder and the small-dip angle conveying pipe are provided respectively with vibrating devices. The shaft furnace-electric arc furnace direct reduced iron continuous hot-feeding device overcomes defects of the existing device, reduces shaft furnace height, device production and maintenance costs, and a one-time investment, enlarges a shaft furnace-electric arc furnace distance range, and has a simple, compact, safe and reliable structure. The invention also discloses a control method of shaft furnace-electric arc furnace direct reduced iron continuous hot-feeding. The method utilizes a sensor and a PLC controller to realize real-time monitoring and parameter adjustment, can be operated flexibly, has high safety and is suitable for continuous production.

A photon detector is disclosed that includes, in addition to an immobilisable photon-sensitive element, a photon transmission element. The photon detector is configured such that it can vary photon intensities impacting upon the photon-sensitive element and transmitted by the photon transmission element, for example, by modifying an absorption property or a defocussing property of the photon transmission element. Also, the immobile photon-sensitive element, which can be, for example a SPAD (Single Photon Avalanche Diode), always operates close to the optimal operating range and below an immobilisation range. A distancing device that includes this type of photo detector is also disclosed.

A solid-state imager in a reader for electro-optically reading indicia located in a range of working distances includes an array of image sensors for capturing light from the indicia over a field of view during the reading. The range of working distances in which the indicia are read is varied, either automatically or manually.

According to an embodiment of the present invention, an optical parametric oscillator (OPO) (e.g., for a laser transmitting device) includes non-linear optical media, optical beam manipulating elements, and a narrow linewidth filter in the form of a rotatable grating. The grating enables rapid tuning of the oscillator to provide an output beam with a desired wavelength. A pump laser provides a pump laser beam, and the non-linear optical media convert the pump beam into light beams with a signal wavelength and an idler wavelength. The angular positions or orientations of the non-linear optical media relative to a longitudinal propagation axis of the optical parametric oscillator (OPO) are adjustable to effectively tune the resulting signal and idler wavelengths. An output coupler receives the resulting beams from the non-linear optical media, and emits beams with the desired wavelength (signal and/or idler wavelengths).

Provided are a method for controlling a beamforming antenna to enhance transmitting/receiving performance and a wireless communication device performing the same in a TDMA-based wireless communication system. The wireless communication device includes a beamforming antenna, which is configured with omnidirectional antennas, including a central antenna and a plurality of parasitic antennas and a controller controlling a beamforming direction of the beamforming antenna by analyzing a signal received from other station. The method for controlling a beamforming antenna includes analyzing, by a wireless communication device having a beamforming antenna, which is configured with omnidirectional antennas, including a central antenna and a plurality of parasitic antennas, a signal received from other station to control a beamforming direction of the beamforming antenna.

The invention provides a distance measurement method and device based on a laser radar system, and a readable storage medium. The distance measurement method comprises the steps that distance measurement data measured through a plurality of laser radars of the laser radar system are received, wherein the distance measurement data comprise distances between the laser radars and all obstacles withinthe measurement range of the laser radars; a three-dimensional coordinate model is built according to the distance measurement data; and distances between target unmanned driving equipment and the obstacles are determined according to the three-dimensional coordinate model. The three-dimensional coordinate model is built through the distance measurement data measured by the multiple laser radars,the distances between the target unmanned driving equipment and the obstacles are determined according to the three-dimensional coordinate model, and thus compared with the mode that in the prior art, measured distance calibration through a visual image algorithm is conducted by a single laser radar, the distance measurement method can implement measured distance calibration tasks with larger distance ranges, effectively improves the calibration efficiency of the visual image algorithm and effectively increases the accuracy rate of the visual image algorithm.

The invention discloses a millimeter-wave dual reflector antenna capable of focusing a near-field wave beam. The antenna comprises a main reflector, an auxiliary reflector and a feed source, wherein a wave beam emitted by the feed source is reflected by the auxiliary reflector to the main reflector, and then emitted; a curved surface of the main reflector is a revolution paraboloid; and a central point of the main reflector is located at an intersection point of an emitting central axis of the auxiliary reflector and an axis of a radiation wave beam. The antenna is simple in structure and mature to process; the power density of a near-field region axis of the antenna is improved; the maximum power density of the axis is improved greatly under the same input power; a distance range of an effective power threshold is expanded; the efficiency of the antenna is improved; and a near-field gain of the antenna is increased.

The invention relates to a cliff detecting method and device and a floor sweeping robot. The method comprises the following steps that: an ultrasonic signal is sent to a front lower side of a floor sweeping robot; whether an echo signal returned by the ultrasonic signal after meeting a reflection object is received within a predetermined time is determined; if so, a distance between the bottom ofthe floor sweeping robot and an emitting object is obtained according to the echo signal; the distance is compared with a preset distance threshold to determine whether a cliff exists at the lower front side of the moving direction of the floor sweeping robot. Therefore, a problem that the infrared signal cliff detecting mode is susceptible to the influences of the color of the reflector and the interference of the strong light is solved. With multiple gears for ultrasonic signal emission, the distance range of the ultrasonic ranging is greatly increased; in a short-distance state, the refection objet is detected at a low gear, so that power consumption of the machine is reduced, the endurance of the floor sweeping robot is enhanced, and the noises are reduced. The method is implemented simply; the environmental adaptability is high; the detection reliability is high; and the performance of the floor sweeping robot is improved substantially.

A smart home security control device includes a security control device, which includes a lighting module and is provided, in the interior thereof, with a main control board and multiple modules connected with the main control board. The main control board is connected to related detection modules, which allows for expansion of different detection functions in a manner of being removable and insertable so as to make data of detection of a target body more accurate. Connection with each of electric appliances located around can be made with an infrared control module and a wireless communication module, and control can be made through an audio module that is also arranged on the main control board so that the application of the security control device for a range of smart control can be expanded.

The invention discloses an industrial robot with the automatic feeding and discharging functions. The industrial robot comprises a rotary seat, a machine arm, a clamping mechanism and a moving mechanism, wherein the top of the rotary seat is provided with the machine arm, one end of the machine arm is provided with the clamping mechanism, and one side of the rotary seat is provided with the movingmechanism. According to the industrial robot, the feeding and discharging operations on a large number of plates are rapidly and conveniently completed, then the feeding and discharging operations can be carried out on the plates with more sizes under the condition that the telescopic length of a first hydraulic rod is not changed, and the surfaces of the plates are protected through elastic buffering contact stress of springs in the technical stage of the clamping process; and meanwhile, the stable and reliable clamping can be ensured through a plurality of first telescopic clamping seats and second telescopic clamping seats, and when the first hydraulic rod is contracted, the first telescopic clamping seats are extruded out of a pipeline while the springs return to the original state, the first telescopic clamping seats always have acting force on the plates until the springs and the second telescopic clamping seats both return to the original state, and then the clamping position is automatically adjusted.

The invention discloses an electrode distance adjustable type microarc oxidation electrode holder, which is characterized by consisting of three transverse parallel rectangular support frames, two long screw rods which are perpendicular to and connected in series with the rectangular support frames, and adjusting nuts on the long screw rods. By adopting the electrode distance adjustable type micro-arc oxidation electrode holder, the electrode distance can be changed to control the distribution of oxidation voltage during the microarc oxidation process, so that energy consumption is controlled, a required cathode can be replaced in any time to enlarge the distance range which can be adjusted by the electrode, current efficiency is improved, and thus the electrode distance adjustable type microarc oxidation electrode holder is simple and easy, and practical.

This invention relates to power supply system having recharging unit with load isolation and its method of operation. The power supply unit has one or more energy storage device and such energy storage device is of low voltage rating when compared with the operating voltage of the load. The power supply units when operated through an intermediate section and an output combiner, due to alternative parallel and series connections of capacitors supplies to the load an enhanced voltage as required by the load with complete isolation between the recharging unit of the system and load. The recharging unit supplies the recharging voltage to the input battery whenever the input battery is isolated from the load. Due to which, the energy storage devices serves for large distance range and better speed range in case of electric vehicles.