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109results about How to "Reliability advantage" patented technology

A high-quality three-dimensional color image acquisition method based on a composite video camera and an apparatus thereof

InactiveCN103337069AImprove depth image accuracy problemImprove image qualityImage analysisColor imageHigh resolution image
The invention discloses a high-quality three-dimensional color image acquisition method based on a composite video camera and an apparatus thereof. The apparatus comprises a two-dimensional video camera, a three-dimensional video camera, a main fixed plate, an expansion application interface board, and a three-dimensional camera fixed connection board. According the invention, imaging information on a same scene separately acquired by the three-dimensional video camera and the two-dimensional video camera at a same time are blended; A depth image of the three-dimensional video camera is interpolated to be an expected high resolution image; matching correlation of a high-quality two dimensional color image of the two-dimensional video camera and the interpolated depth image of the three-dimensional video camera is completed; real-time synchronized acquisition of high precision color images in the same scene and corresponding three-dimensional information is realized; meanwhile, advantages of high-quality color two-dimensional imaging of the two-dimensional video camera and the rapid three-dimensional information acquisition of the three-dimensional video camera are kept. The high-quality three-dimensional color image acquisition method based on a composite video camera and the apparatus thereof of the invention can be widely applied to fields such as industrial visual sense assembling, detection and robot visual sense navigation. The speed, accuracy, and reliability of three dimensional scene visual understanding and visual sense and identification can be raised.
Owner:余洪山

Storage battery performance on-line monitoring system and monitoring method

The invention discloses a storage battery performance on-line monitoring system and a storage battery performance on-line monitoring method. Each storage battery on-line monitoring unit comprises an acquisition unit, an internal resistance measuring unit and a communication unit; batteries in a storage battery pack are divided into a plurality of units; a load and the batteries in each unit form a closed-loop circuit, and the batteries are discharged; the acquisition unit acquires discharging parameters of each battery; the internal resistance measuring unit calculates the internal resistance of each battery according to acquired information and uploads the internal resistance to the communication unit; the communication unit accesses a local area network and transmits data to a server; after receiving the data, the server analyzes, processes and stores the data; the data are published in a webpage form through a built-in web publishing function; and a computer in the local area network checks the situation of each storage battery pack by accessing a webpage. By adoption of a multi-cycle on-line testing method, safety and reliability are realized, the discharging internal resistance is tested in a grouped mode, and during test, safety operation of a power system is not influenced. The invention has the advantages of stable and accurate test result and convenient testing process.
Owner:STATE GRID CORP OF CHINA +1

Inverter input and output reverse connection detection and protection method and device

The invention relates to a frequency converter input / output reverse connection detection protection method and a frequency converter input / output reverse connection detection protection device. The method comprises the following steps of: 1, detecting the output current of a frequency converter by using an output current detection circuit during initial electrification; 2, comparing an output current value detected in the step 1 with a reference current value by using a first comparison module of a central processing unit (CPU); 3, blocking a driving circuit of the frequency converter by using a first control module of the CPU; 4, detecting the direct-current bus voltage of the frequency converter; 5, judging whether the direct-current bus voltage detected in the step 4 is greater than a current limiting switch switch-on threshold value of a charging current limiting circuit or not by using a second comparison module of the CPU; 6, charging a high-voltage electrolytic capacitor, and continuously limiting charging current by using the charging current limiting circuit simultaneously; and 7, outputting a current limiting switch action signal by using a second control module of the CPU. By the method and the device, the technical problem that an inversion unit power device can be damaged by extremely high charging current generated during the input / output reverse connection of the frequency converter is solved.
Owner:GUANGZHOU SANJING ELETRIC

Highly-reliable main circuit topological structure of railway ground deflector

InactiveCN105790598ARealize fault redundant operationReliability advantageAc-ac conversionCarrier signalEngineering
The invention discloses a highly-reliable main circuit topological structure of a railway ground deflector. The highly-reliable main circuit topological structure comprises a rectification unit, an intermediate DC link and an inversion unit, wherein the rectification unit comprises a single-phase input multi-winding isolation transformer and N power modules on the rectification side. The primary side of the single-phase input multi-winding isolation transformer is connected with a railway traction network, and the secondary side of the single-phase input multi-winding isolation transformer is a plurality of electrically isolated multi-winding coils. Each multi-winding coil is connected with the AC input side of a rectification-side power module, the positive DC bus of the power module is in parallel with the positive DC bus of the intermediate DC link, and the negative DC bus of the power module is in parallel with the negative DC bus of the intermediate DC link. M electrical isolation converter sub-systems can be designed according to system power transformation requirements, power modules in the converter sub-systems are controlled through a carrier phase-shift PWM modulation strategy, cascade operation is carried out through the magnetic field of an isolation transformer, and the reliability of a converter is improved.
Owner:中国船舶重工集团公司第七一二研究所 +2

Cognitive load and pressure measurement method and device based on peripheral vessel strain

ActiveCN105852884AGood reliabilityIndividual differences are obviousSensorsPsychotechnic devicesMeasurement deviceWave band
The invention provides a cognitive load and pressure measurement method based on peripheral vessel strain. The cognitive load and pressure measurement method comprises the following steps: collecting PPG (photo-plethysmography) signals by adopting a transmission-type or reflection-type photoelectric sensor, and carrying out filtering to eliminate noises; carrying out instantaneous peripheral vessel strain feature extraction; carrying out dynamic sliding window arrangement and data modulation based on the statistics to obtain the continuous and stable sVRI output; and finally, evaluating the cognitive load and the pressure level by adopting sVRI. The invention further provides a corresponding measurement device. Different from the traditional measure methods based on the peripheral vessel expansion degree, in the measurement method provided by the invention, the sVRI adopts the ratio of the amplitudes of the adjacent wave bands of the PPG signals, and the experiment finds that the indication is relatively sensitive and reliable in reflecting the cognitive load and the pressure; the cognitive load and pressure measurement technology based on the peripheral vessel strain has the obvious advantages in the aspects of sensitivity, reliability and individual differences when used for measuring the psychological activities including the cognitive load and the psychological pressure of people, can carry out real-time measurement, and can be well applied to the pervasive environment.
Owner:TSINGHUA UNIV

Hydropower station set vibration measurement monitoring method

The invention relates to the hydropower station set detection field, and particularly relates to a hydropower station set vibration measurement monitoring method. A piezoelectric acceleration sensor and a pre processing module are provided. A protection data acquisition device finishes A/D data acquisition and is in charge of suppressing sensor resonance signals at the same time; and a low-noise and low-attenuation cable is adopted between the piezoelectric acceleration sensor and the pre processing module, so as to ensure electric signals not to bring attenuation and larger noise in the transmission process. When the piezoelectric acceleration sensor is applied to hydropower station set vibration measurement, features of high sensitivity, low noise, low frequency response and the like are provided, voltage signals outputted by low-frequency small-amplitude vibration signals can be ensured to be strong enough, true low-frequency small-amplitude acceleration signals can be ensured not to be overwhelmed by the noise signals, vibration signals as low as 0.5Hz can be detected, and problems of distortion, or failure, poor precision and the like of the original inertial low-frequency vibration sensor measurement signals are solved.
Owner:白山发电厂 +2

Laser raster locating system for rail mobile device

The invention provides a laser raster locating system for a rail mobile device and relates to a laser locating system. The laser raster locating system for the rail mobile device comprises a movement guide rail (1), the mobile device (2), a laser emitting and receiving module (3) and a locating raster bar (4). The movement guide rail (1) is used for offering movement restraint and a movement trail of the mobile device; the bottom of the mobile device (2) is installed on the movement guide rail and the mobile device (2) moves laterally along the movement guide rail; the laser emitting and receiving module (3) is fixed to the mobile device (2) and used for emitting lasers and receiving reflected laser signals; the locating raster bar (4) is installed on a fixed rack (5) and used for providing the reflected laser signals with different intensities and modes, wherein the fixed rack (5) is used for containing an object to be located. According to the laser raster locating system for the rail mobile device, the locating error is smaller than 2mm, the locating accuracy and the locating reliability are high, the manufacturing cost is low, and the laser raster locating system for the rail mobile device is particularly suitable for the accurate location of the rail mobile device.
Owner:广西恒帆智能科技有限公司

Ultra-micro injection detection and control device and method based on lensless imaging technology

The invention relates to an ultra-micro injection detection and control device and method based on a lensless imaging technology, relates to the fields of lensless imaging technologies and ultra-microinjection control technologies of microinjection systems, and aims to solve the problems of lack of a device capable of accurately detecting liquid level position change in a capillary glass needle,and accurate control of the volume of injection liquid in the prior art. A lensless optical liquid level sensor is used for measuring the liquid level change in an injection needle; a microinjection control unit is used for tracking liquid level change conditions and correcting the injection pressure of a syringe pump; transmitted light generated by a parallel light source penetrates a transparentinjection needle tubing made of glass, passes through a light-reducing film to weaken the intensity of the parallel light source to be within the photosensitive range of a micro-linear array image sensing chip, and finally is injected into the micro-linear array image sensing chip, and the liquid level change in the injection needle is measured by the micro-linear array image sensing chip. The device is used for measuring the liquid level change in the glass needle and correcting the pressure of the syringe pump to stabilize the injection liquid in a syringe.
Owner:HARBIN INST OF TECH
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