38results about How to "Adequate response time" patented technology

A system for increasing awareness of a driver to traffic-signs on the road is provided herein. The system includes: a sensor attached to a vehicle and configured to determine a type of one or more traffic-signs that are present in a scene containing the vehicle, wherein at least some of the traffic-signs are time-variant traffic-signs which present time-variant visual indicators; and a controller configured to: monitor and analyze, in real time: relative metrics indicative of one or more spatial relations between the vehicle and the one or more detected traffic-signs; and temporal data associated with the time-variant visual indicators of the time-variant traffic-signs; apply one or more decision functions to at least two of: the detected one or more traffic-signs and to the monitored relative metrics, and the temporal data associated with the time-variant visual indicators, so as invoke an action selected from a predefined set of actions.

The present invention relates to a device for accomplishing noise reduction in a photoacoustic gas detector using a sound damping element and / or a background or reference microphone where a preferably larger external volume that acts as a sound damping element (SDE) is coupled to a smaller volume through which the gas diffuses. The coupling is accomplished in such a way that the externally generated sound waves incident upon the photoacoustic detector are adequately attenuated by the larger volume SDE without adversely affecting diffusion of the gaseous species of interest through the smaller volume for measurement by the detector. Preferably this is accomplished by coupling the larger SDE volume to the smaller gas diffusion volume by a long and thin pressure channel. Another photoacoustic detector includes a measuring system to measure the photoacoustic excitation of analyte gas entering the photoacoustic detector, a reference system to measure the effect of pressure waves in the environment, and a system for offsetting an output from the measuring system with an output from the reference system to reduce noise resulting from pressure waves in the environment in an output signal of the photoacoustic detector. The present invention also relates to a device for testing the integrity of a porous member and includes a source of pressure waves and a sensor for measuring a signal resulting from the transmittal of pressure waves from the transmitter. The signal is proportional to pressure losses through the porous member. The pressure losses through the porous member are, in turn, a measure of the degree to which the porous member has become clogged.

A bicycle LED signaling device for a bicycle includes a lighting module with at least one array of light emitting diodes (LEDs), a power source, an operation interface, and a controller connected to the power source and the operation interface to receive an operation command to control the LED array to display a corresponding signal.

The invention relates to an obstacle avoidance method for safe return of unmanned aerial vehicles, including: collecting image information to determine the actual height of the unmanned aerial vehicle; readjusting the maximum flight height and the maximum Flight speed; if the distance between the object in the environment and the drone is less than the critical safety distance, the central control processor controls the movement of the drone; when the drone enters the docking stage, the central control processor controls the drone to land at the docking point. The present invention can quickly obtain the surrounding environment information of the UAV by collecting the image information of the surrounding environment of the UAV, so that the central control processor can quickly obtain the flight height and flight speed of the UAV according to the actual situation. The obstacles that will appear during the flight of the UAV can be predicted in advance, which can effectively avoid the damage or crash of the UAV caused by the collision between the UAV and the obstacle, and effectively improve the inspection efficiency of the UAV.

A parking lot sensor includes a sensor for scanning a parking space for a vehicle. A method for controlling the parking lot sensor includes steps of determining an activity of vehicles in the parking lot, of determining a scanning frequency on the basis of the activity and of controlling, as a function of the scanning frequency, the sensor respectively for carrying out a scan.

The invention discloses a method for reducing ghost images and crosstalk of a 3D television. The method comprises the steps of: driving a liquid-crystal screen to continuously display a same frame picture for n times; judging whether the proportion ps of a screen area, which meets liquid-crystal display response time 1r, occupying a full screen is larger than or equal to 1 or not when the same frame picture is displayed for n times; and turning on a full-screen backlight to display the same frame picture when ps is larger than or equal to 1, or else, turning on the backlight in a strip-by-strip way by adopting a backlight strip scanning approach so as to display the same frame picture. The invention further provides a corresponding device. According to the method and the device for reducing the ghost images and the crosstalk of the 3D television, provided by the invention, the ghost images and the crosstalk of a shutter glass type 3D television can be reduced.

The invention proposes a real-time elimination method of laser powder bed melting near-surface forming defects. First, the distance h between the laser powder bed melting and forming defects and the surface of the deposition layer is monitored in real time through an external acquisition system; then the position of the defect is determined, and when h > When the thickness of N deposition layers is reached, laser remelting is performed immediately; when h≤N thicknesses of deposition layers, powder spreading and laser powder bed melting are performed, and so on and so forth until the cumulative printing height H reaches the specified height, and the surface of the deposition layer is re-melted. Perform laser remelting. Compared with the existing forming technology, the present invention can not only reduce the surface roughness of the formed part, but also realize the timely elimination of pore defects. The forming efficiency is greatly improved, and at the same time, a more abundant response time is obtained for the online feedback adjustment of defects.

The invention provides a rail traffic monitoring system and method. It includes multiple monitoring and alarm terminals, data exchange modules and vehicle-mounted terminals arranged along the track; the monitoring and alarm terminal includes multiple image acquisition modules, multiple optical alarm modules, and the first processing module; all first processing modules are connected and communicated through the data exchange module The first processing module identifies whether there is a foreign object in the image output by the image acquisition module, and when there is a foreign object intrusion, the first processing module of the monitoring and alarm terminal at the front or the rear transmits an alarm signal, so that the first distance range at the front or the rear The optical alarm module in the vehicle sends out an optical alarm signal; the vehicle-mounted terminal includes an optical receiver located at the front of the train and a second processing module. The system sends out an optical alarm signal through the optical alarm module, and does not rely on the signal system to transmit the alarm signal. When the signal communication system fails, or in scenarios with poor communication quality such as tunnels, the alarm signal can still be effectively transmitted to improve driving safety.

The invention provides an HF / VHF frequency-range ultra wide band electromagnetic pulse protection module comprising a coaxial cavity low-pass filter, a gas discharge tube, a high-power TVS (Transient Voltage Suppressors) tube and a low-power TVS tube, wherein the two ends of the coaxial cavity low-pass filter are connected to coaxial ports through copper leads, respectively; the gas discharge tube and the high-power TVS tube are connected in series and then connected between the copper lead at one end of the coaxial cavity low-pass filter and a ground wire; and the low-power TVS tube is connected between the copper lead at the other end of the coaxial cavity low-pass filter and the ground wire. In the coaxial connection manner, the module can be conveniently mounted on a coaxial signal wire between an outdoor cable (including an antenna) and an indoor electronic device so as to discharge ultra wide band electromagnetic pulses coupled to the signal cable; therefore, the module is capable of protecting HF / VHF frequency-range sensitive devices from the damage of the pulse energy.

The invention discloses an axial flow compressor rotating stall early warning method based on frequency-domain hump identification. The method continuously calculates the frequency spectrum of the pressure signal within a compressor rotation cycle through continuous dynamic pressure signal collection and fast Fourier transform. The characteristic hump discriminant factor Ch corresponding to the frequency spectrum is calculated, and by comparing the characteristic hump discriminant factor Ch with the detection threshold Chstall, it is judged whether the compressor is close to the rotating stall boundary. The characteristic hump discriminant factor Ch defined by the axial flow compressor rotating stall early warning method has a clear physical meaning, and is used for real-time on-line detection of the frequency domain hump that occurs prior to the rotating stall, so that when the working condition of the compressor is close to the boundary of the rotating stall, it will send out Early warning, early warning method is reliable. The axial compressor rotating stall early warning method only needs a single signal sensor, adopts fast Fourier transform, has few intermediate processes and fast calculation speed, and provides sufficient response time for active control.