30 results about "Lidar detector" patented technology

An apparatus for illuminating or masking an object and a method of using same. The apparatus includes a spatial light modulator transmitting, a structured pulsed laser beam from a pupil plane to at least one image plane in a field of view. The apparatus further includes a lidar detector receiving reflected laser beam reflected from the at least one image plane. For example, the lidar detector detects range, position, and / or time data for at least one object of interest or at least one object of disinterest. Using the detected data, the spatial light modulator illuminates object of interest or masks an object of disinterest, depending on a user's application.

Provided is a space-borne laser radar detector calibration system used for realizing calibration of the sensitivity, the linearity and the time response of detectors. The light emitted by an LED with low intensity, stable operation, and easy intensity adjustment is converted to the light irrelevant to the angle by employing an integrating sphere, the light irrelevant to the angle in the integrating sphere is coupled to an optical fiber through a coupling lens, the light in the optical fiber forms a collimated light which is easy for optical path construction through a collimating mirror, the collimated light is spitted by employing a fiber splitter, attenuated, and introduced to each detector, and the calibration of the sensitivity and the linearity is realized; and the calibration of the time response of the detectors requires a light source with ultrafast response time, a laser can generate narrow pulse with the ns-level width, time response information of the detectors can be conveniently extracted by employing the laser for generating the ns level, and the calibration of the time response is realized.

An apparatus has a beam steerable laser emitter and a detector array with array elements. Electronics selectively enable first array elements corresponding to expected return signal paths and disable second array elements corresponding to unexpected return signal paths.

The application discloses a system and method for controlling crushed stone transmission in mining based on radar detection, including: a plate feeder, a laser radar detector located at the position where the mouth of the machine is aligned with the plate feeder, a PLC control module and Background server; Wherein, lidar detector, is used for obtaining the digital signal of the outline of the stone on the conveying plate of apron feeder by lidar scanning, and feeds it back to background server; Background server, is used for according to receiving The digital signal is used to calculate the proportion of large and small stones on the current conveying plate; the PLC control module is used to control the current value input to the motor of the apron feeder according to the calculated proportion of large and small stones to control the apron feeder. The frequency at which the feeder feeds stones into the crusher. The application can not only maximize the role of the crusher, but also not cause the jamming of the crusher, etc., realize the fully automatic transmission of crushed stones in mining equipment, improve work efficiency, and reduce costs.

The invention discloses an AFS-based laser radar detection system, which is characterized in that: the radar detection system is a controller that connects a vehicle speed sensor and a steering wheel angle sensor through a CAN bus to receive a vehicle speed signal and a steering wheel angle signal; the output of the controller is The end is connected with a motor and a transmission mechanism, and the transmission mechanism drives the headlights of the laser radar detector. The detection direction of the laser radar detector rotates synchronously with the headlights to detect the distance of obstacles on the curve. Due to the adoption of the above-mentioned structure, the present invention is used as an auxiliary facility of AFS, eliminates blind spots of AFS, can detect obstacles in advance in curves, and ensures safety; and the overall cost is low, and is suitable for popularization on middle and low-end cars.

The invention discloses a photon event concurrent detection circuit and method for a single photon 3D laser radar detector. The detection circuit comprises four RS flip-flops, a judging circuit and atrigger / reset circuit, wherein the judging circuit consists of a mirror current source network and a voltage comparator; and the judging circuit converts the number of avalanche pulse signals into a signal whose voltage threshold is VA through the mirror current source network, and compares the signal with a set reference voltage signal Vref through the voltage comparator to realize the function of concurrent detection of photon events and suppressing of noise photons. The photon event concurrent detection circuit provided by the invention occupies a small chip layout area, effectively improves filling factors of the SPAD pixel unit, improves the degree of integration of the SPAD array detector, and has the advantages of low circuit complexity, complete compatibility of the manufacturing process with the CMOS process, low manufacturing cost, good performance consistency among the respective circuits, and high yield.

A remote sensing detection method based on an unmanned aerial vehicle platform belongs to the field of remote sensing and surveying and mapping. The invention aims at the problem that existing spectrum image data and lidar point cloud data cannot be effectively fused due to multi-source heterogeneity. Including: mount the spectrum detector and LiDAR detector as an overall frame under the UAV; use the UAV ground station to control the UAV flight controller to send data acquisition commands to the microcontroller, and then detect the spectrum detector and LiDAR Synchronous acquisition and control of the IMU / GPS integrated navigation unit; data registration to obtain the spatial correspondence between the two data; up-sampling of the collected data to achieve spatially consistent sampling of the data; and then according to the spatial correspondence, the spectrum The image data and LiDAR point cloud data are fused to obtain multi / hyperspectral point cloud data. On the basis of realizing integrated detection of image-spectrum-space multi-dimensional data, the present invention fuses spectral and spatial information to finally generate a spectral point cloud.

The invention provides a laser radar total wave signal analyzing method. According to the method, when updating is carried out every time, one of the parameters including the number k of echo signals, noise signals B incident to a laser radar detector, the peak position t0 of each echo signal and the peak amplitude beta of each echo signal is selected at random so that updating can continue to be carried out; the parameter k is updated based on the Metropolis algorithm thought, the parameter B is updated based on the Metropolis algorithm or the simulation tempering algorithm thought, and the parameter t0 and the parameter beta are respectively updated based on the simulation tempering algorithm thought. According to the laser radar total wave signal analyzing method, total wave signals of targets with unknown characters can be processed quickly without being affected by the signal noise ratio of the total wave signals.

A hybrid LIDAR system 100 includes a flash-based LIDAR detector array. A broad laser emitter is operatively connected to the LIDAR detector array for flash-based LIDAR sensing. A first beam steering mechanism is operatively connected with the broad laser emitter for scanning a scene with a broad beam from the broad laser emitter. A second beam steering mechanism is operatively connected with the LIDAR detector array for directing returns of the broad beam from the scene to the LIDAR detector array.