5 results about "Radar gun" patented technology

The invention discloses an intelligent access control anti-collision barrier gate, and particularly relates to the technical field of access control barrier gates, the intelligent access control anti-collision barrier gate comprises a base, a case is fixed at the top end of the base, a blocking piece is arranged on one side of the case, a deceleration strip is arranged at the bottom of the blocking piece, and an automatic license plate recognizer is fixed at the top end of the base through a mounting frame and used for recognizing license plate information of a vehicle. A radar velocimeter is fixed on the mounting frame and is used for acquiring the driving speed and acceleration data of a vehicle in the process of approaching a barrier gate in real time, and a panoramic camera is fixed at the top end of the case and is used for shooting the driving track of the vehicle so as to judge whether the vehicle maliciously intrudes into a community or not. The vehicle behavior can be intelligently judged, so that the registration release or blocking interception process is triggered, the safety and the passing efficiency are both considered, the daily life of residents is facilitated, and the internal management of a community is facilitated.

The application discloses a highway ramp speed measurement error compensation method based on a binary polynomial fitting. First, the measured ramp speed measurement environment is deployed, and time is matched. Second, the standard speed of the test vehicle, the speed measurement value and the distance measured by the radar speed measurement instrument at the same time are collected, and the measured ramp speed measurement data sample set is made. Then, the ramp speed fitting model is established, the training sample set is input into the ramp speed fitting model for data fitting and calibration. Finally, the calibrated binary polynomial is obtained, the ramp vehicle speed measurement value of the radar speed measurement instrument which needs to be corrected and the captured setting distance are input into the obtained binary polynomial for calculation, and the standard speed after error compensation is output. The application captures the ramp road environment characteristics through data fitting and calibration, realizes adaptive error compensation and measurement value correction of the ramp vehicle speed measurement of the radar speed measurement instrument, and avoids complex mathematical modeling.

The invention belongs to the technical field of liquid metal 3D printing, and particularly relates to a melt impact jet flow regulation and control system for an open launder. A pressure heat preservation device inputs gas into the pressure heat preservation device through a gas conveying pipeline and controls the gas flow to control the pressure in the pressure heat preservation device; the molten metal in the pressure heat preservation device is sprayed to a cooling platform located under the spraying device through the spraying device to be cooled; the laser Doppler radar velocimeter monitors the metal liquid jet velocity in real time and uploads the metal liquid jet velocity to the upper computer, the gas flow needing to be adjusted is calculated through a PID algorithm, a corresponding adjusting control instruction is generated and issued to the MFC and the electromagnetic valve or the small-aperture exhaust valve and the large-aperture exhaust valve, and therefore control over the jet velocity is achieved. Through jet velocity feedback monitored in real time, the flow of gas input into the pressure heat preservation device is adjusted in real time through a PID algorithm to control the pressure in the pressure heat preservation device in real time, and therefore accurate control over the jet velocity is achieved.

The invention provides a visual monitoring system for a railway wagon, and relates to the technical field of railway wagon monitoring. An area-array camera, a video camera, a first bayonet camera, a first light supplementing lamp, a radar velocimeter and a laser radar are arranged in the middle of the cross beam and used for obtaining upper image information, locking image information, vehicle speed and laser waveform information of the railway freight car; a linear array camera and a second light supplementing lamp are arranged in the middle of the stand column and used for obtaining compartment number image information. A second bayonet camera and a third light supplementing lamp are arranged on the lower portion of the stand column and used for obtaining connecting rod position image information of the railway wagon. The magnetic steel inductive sensors are arranged on the two sides of the fixing frame. The processor comprises an in-vehicle loading detection unit, a locking detection unit, a vehicle number identification unit and a connecting rod fracture detection unit; the problems that in-wagon loading detection, locking detection, wagon number recognition and connecting rod breakage detection of a railway wagon are lack of an automatic monitoring technology, depend on manual detection, and are large in workload and low in efficiency are solved.