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146results about How to "avoid collision" patented technology

Multi-dimensional orthogonal resource hopping multiplexing communications method and apparatus

ActiveUS20020191569A1avoid collisionstatistical advantage
The present invention is related to a statistical multiplexing method and apparatus using a multi-dimensional orthogonal resource hopping multiplexing method in a wired/wireless communication systems where a plurality of communication channels, which are synchronized through a single medium, coexist. The present invention, in order to implement a generalized statistical multiplexing communication system using a multi-dimensional orthogonal resource hopping multiplexing method, comprises a multi-dimensional hopping pattern generator which is located in the primary communication station, a data symbol modulator that modulates data symbols based on the corresponding orthogonal resource hopping pattern generated by said multi-dimensional hopping pattern generator, a collision detector and controller that detects whether a collision occurs or not between the multi-dimensional hopping patterns and compares the consistency of the data symbols toward the secondary communication stations between said collision interval, a transmission power controller that controls the transmission power of the remaining parts excluding the parts where the multi-dimensional hopping patterns collide and the transmission is stopped due to transmitting data symbol inconsistency and compensates for the loss in the average reception energy due to a transmission stoppage.
Owner:KOREA ADVANCED INST OF SCI & TECH +1

Vehicle-mounted car-backing simulation system

InactiveCN102795174Aavoid collisionEnsure the safety of life and property
The invention provides a vehicle-mounted car-backing simulation system comprising a vehicle-mounted navigating instrument arranged in a car and a wide-angle camera arranged at the tail of the car and also comprising a speed sensor and an analog-to-digital conversion module which is connected between the wide-angle camera and the vehicle-mounted navigating instrument; the vehicle-mounted navigating instrument comprises an image processing module, an MCU (Microgrammed Control Unit) control module and a display; the MCU control module is used for calculating the position of the car after a set time according to information on the speed sensor and the angle of a steering wheel under a car-backing mode; and the image processing module is used for analyzing and processing environment image information captured by using the wide-angle camera and digitally processed by the analog-to-digital conversion module, overlying the environment image information with the position of the car after the set time, which is calculated by the MCU control module, and simulating the motion curve of the car within the set time on the display. The vehicle-mounted car-backing simulation system can be used for simulating the motion curve of the car within several seconds according to the surrounding environment of the car as well as the car-backing speed and direction and enabling a driver to more intuitively know the car-backing condition and plays auxiliary car-backing and stopping roles.
Owner:SHENZHEN HANGSHENG ELECTRONICS

Myoelectric prosthetic hand force tactile feedback method and tactile feedback myoelectric prosthetic hand system

ActiveCN102379760Aavoid collisiongood normal life
Disclosed are a myoelectric prosthetic hand force tactile feedback method and a tactile feedback myoelectric prosthetic hand system. A three-dimensional force sensor is mounted on a wrist of a mechanical prosthetic hand, and a stress shaft of the three-dimensional force sensor is connected with a mechanical prosthetic hand base via a flange and senses stress conditions in directions of three axes of the mechanical prosthetic hand. After the three-dimensional force sensor receives three-dimensional force action, force signals are converted into voltage signals via a bridge principle, the voltage signals are inputted into a control module provided with a single chip microcomputer and a motor driving circuit, the single chip microcomputer acquires the voltage signals which are transmitted from the three-dimensional force sensor and stand for force action on an X axis, a Y axis and a Z axis, positive and negative directions of the voltage signals include directions of X+, X-, Y+, Y-, Z+ and Z-, corresponding pulse width modulation signals are outputted according to the voltage amplitudes in the six directions, namely measured magnitude of stresses in the six directions, and the motor driving circuit drives miniature vibrators in the corresponding directions, so that amplitudes of the vibrators are in direct proportion to the voltage amplitudes in the corresponding directions.
Owner:SOUTHEAST UNIV

Ultrahigh frequency passive radio frequency identification reader and frequency hopping method thereof

The invention discloses an ultrahigh frequency passive radio frequency identification reader which mainly comprises a frequency synthesizer, an up-conversion mixer, a down-conversion mixer and a receiving-transmitting separator, wherein the up-conversion mixer and the down-conversion mixer are connected with the frequency synthesizer; the receiving-transmitting separator is respectively connected with the up-conversion mixer and the down-conversion mixer. The ultrahigh frequency passive radio frequency identification reader is characterized in that the frequency synthesizer is also connected with a true-random number generator. The invention also discloses a frequency hopping method of the ultrahigh frequency passive radio frequency identification reader. The true-random number generator is used for controlling frequency hopping, and a working channel of each frequency hopping is decided by the true-random number generator. Because a true-random number is not generated by calculating by an algorithm but comes from physical randomness, the true-random number has unpredictability. The invention effectively overcomes the defect that an ordinary ultrahigh frequency passive radio frequency reader adopting a pseudo-random number frequency hopping is easy to be inimically tracked and interfered.
Owner:成都三零盛安信息系统有限公司

Graded braking control device and control method for vehicle tire burst

ActiveUS20170066421A1ensure quick and stable brakingavoid collision
The present invention provides a graded braking control device and control method for vehicle tire burst, and belongs to the technical field of vehicles. It solves the problems of rear-end collision and more instability of the vehicle resulting from emergency brake after vehicle tire burst. The device includes a tire pressure sensor, a controller, a radar sensor, a stability detection module and an ESC, wherein the radar sensor and the stability detection module are respectively connected with input ends of the controller, the tire pressure sensor is in wireless connection with the controller, and the ESC is connected with an output end of the controller. The control method includes: 1. monitoring vehicle tire condition; 2. carrying out traffic state assessment and determining a first maximum braking deceleration value for preventing the rear-end collision with the follower vehicle after emergency brake of the present vehicle; 3. carrying out tire burst vehicle stability state assessment in combination with the current speed and setting the maximum braking deceleration under stable state; and 4. carrying out tire burst graded braking. The device and the method can ensure quick and stable braking of the tire burst vehicle, and avoid the rear-end collision of the present vehicle with the follower vehicle.
Owner:ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1

Integrated navigation method of crab pond automatic working ship based on information fusion of low-precision GPS, laser ranging sensor and orientation sensor

ActiveCN110307834Aavoid collisionImprove stability and anti-interference ability
The invention discloses an integrated navigation method of a crab pond automatic working ship based on information fusion of a low-precision GPS, a laser ranging sensor and an orientation sensor, thereby realizing navigation of the crab pond automatic working ship. According to the navigation mode of the automatic working ship, an internal spiral path that starts with a certain point, is parallelto the pond embankment and is arranged at a certain travel interval is used. According to the invention, a low-precision GPS system determines the location of an inflection point of a navigation trackand a track course; an orientation sensor determines the motion direction of a current automatic working ship; and a laser ranging sensor determines a distance between the automatic working ship anda near-side pond embankment. On the basis of the distance between the working ship and the pond embankment, certain mathematical calculation is performed by combining a current course angle to obtaina difference between a current course angle and a desired course angle; an angle deviation value is introduced into a paddle wheel motor drive control system; a generated rotating speed difference between left and right paddle wheels is adjusted by a PD control method to realize the course controlling of the working ship, so that the navigation of the crab pond automatic working ship is realized.
Owner:JIANGSU UNIV

Novel and simple water-hammer eliminating device

PendingCN108825923Aavoid collision
The invention provides a novel and simple water-hammer eliminating device. The device comprises a water conveying pipe, a pipe valve and a protection box arranged on the pipe. A penetrating hole is formed between the protection box and the pipe and arranged in a water inlet of the pipe valve. A pressure operated valve is arranged in the penetrating hole and opened and closed through water pressure. The pressure operated valve is of a rectangular plate, and a pressure operated valve shaft or a hole allowing a valve through shaft to penetrate through is formed in the two sides of the position atone third of the length of the pressure operated valve. The two ends of the pressure operated valve shaft or the through shaft are fixed into the protection box and perpendicular to the portion, corresponding to the pressure operated valve shaft or the through shaft, of lower end of the side wall of the pipe. Water flowing cyclically through an impeller exists in the protection box. The novel andsimple water-hammer eliminating device has the beneficial effects that the structure is simple, implanting is easy, the problems that in a pipe closed system, the water flowing velocity is suddenly dropped due to certain external reasons such as sudden closing of the valve, and water-hammers damage the pipe are solved, the service life of the pipe is prolonged, and the pipe materials are saved.
Owner:TIANJIN CHENGJIAN UNIV +1

Push-type door opener with damper and push-type door opening anti-collision implementation method

PendingCN107489330Aavoid collisionavoid noise
The invention provides a push-type door opener with damper and a push-type door opening anti-collision implementation method. The push-type door opener comprises a shell, a push rod, an elastic element used for pushing the push rod to move towards the outside of the shell and a push rod limiting device. The outer wall of the push rod is provided with a convex edge. The linear damper is arranged the convex edge on the push rod and the first end of the shell. The push-type door opening anti-collision implementation method comprises the steps that the push-type door opener is arranged in the position, opposite to the inner surface of a door, of a door frame; the push-type door opener is internally provided with the linear damper; when the push rod of the push-type door opener is popped outwards, the push rod makes contact with the linear damper, and compression to the linear damper is increased gradually; the push rod is popped out slowly under the action of counter acting force of the linear damper to the push rod, so that collision between the door and the push rod is avoided. By adopting the push-type door opener with damper and the push-type door opening anti-collision implementation method, collision between the door and the push rod can be avoided, and noise generated from collision can be avoided.
Owner:泰特斯(深圳)零部件有限公司
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