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951results about How to "Stable performance" patented technology

Intelligent lithium ion battery management system for electric vehicle and balance control method thereof

The invention relates to an intelligent lithium ion battery management system for an electric vehicle. The management system is characterized in that a microcontroller module is connected with a power supply module, a data detection module, a charge-discharge control module, a safety protection module, a communication module, a data storage module and a balance management module. The balance control method comprises the following steps: carrying out balance self-inspection according to each collected single cell voltage data in a cell unit; if the balance self-inspection is successful, judging whether to start balance control; if the difference between the single cell voltage and the average value voltage is larger than a preset threshold voltage and the voltage of a certain single cell is larger than a preset threshold, carrying out balance control with PWM duty ratio obtained based on the single cell voltage being as balance time; or otherwise, giving up carrying out the balance control. The management system in the invention is a centralized battery management system, and has the advantages of small size, stable performance, high detection precision, low cost and high reliability and the like.
Owner:SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI

Device for detecting comprehensive performance of high-speed precision ball screw pair

The invention provides a device for detecting the comprehensive performance of a high-speed precision ball screw pair, belongs to the technical field of detection of ball screw pairs, and relates to a device for detecting the comprehensive performance of an oiled and cooled high-speed precision hollow ball screw pair. The device is provided with a lathe bed of which an inner cavity has a U-shape groove structure; a power component is installed in the U-shape groove at the left end of the lathe bed; an angle encoder is arranged in a servo motor of the power component; an output shaft of the servo motor is connected with a torque sensor through a coupler; the coupler is installed between the torque sensor and the detected ball screw pair; the torque sensor is installed in the inner cavity of the lathe bed through a torque sensor support; an eddy current sensor is installed on a bracket of the eddy current sensor and the inner cavity of the lathe bed through a magnetic seat. The device can detect the comprehensive performance of different types of ball screw pairs, can be used for detecting multiple items, is particularly convenient to detect a hollow screw, is convenient to detect, install and adjust, wide in detection range and simple in structure and is provided with an electric pump.
Owner:大连高金数控集团有限公司 +1

Method and device for processing metal materials with cryogenic laser shock

ActiveCN102492805AStable performanceAvoid brittle failurePhysicsDislocation
A method and a device for processing metal materials with cryogenic laser shock belong to the fields of laser processing and subzero treatment. The device comprises a cryogenic treatment cavity, a laser, a liquid nitrogen tank, a temperature sensor and the like. The method is used for strengthening the materials in an ultra-low temperature environment by adopting the laser shock processing technology, insulating the materials for a period after the strengthening process, and heating the materials to be as hot as the ambient temperature. In the ultra-low temperature environment, the metal materials shrink, and a large quantity of dislocation is generated in the materials; due to the instant impact effect of the laser shock processing technology, the high-density dislocation in the materials moves at a high speed, so as to induce high-density nano twin crystal, which ensures that the materials have superior tenacity as well as high intensity, and brittle failure of the metal materials in the low-temperature environment can be avoided effectively; and a large quantity of nano educt is dissolved out from the materials, and the conversion of residual austenite as well as the thinning of martensite and crystal can be promoted effectively, which remarkably improves the mechanical properties and the mechanical properties of the materials.
Owner:JIANGSU UNIV

Intelligent trash can

The invention relates to an intelligent trash can. A bag feeding device, a bag opening device and a control circuit board are arranged in a shell of the trash can, the bag opening device comprises a fixed bag opening mechanism and a movable bag opening mechanism, the fixed bag opening mechanism comprises a first clamping plate, a first rotating shaft, a first bag opening motor, a first magnetic attraction portion and a first bottom plate, the movable bag opening mechanism comprises a second clamping plate, a second rotating shaft, a second bag opening motor, a second magnetic attraction portion, a second bottom plate and a horizontal drive assembly, the first clamping plate is rotatably mounted on the first bottom plate, the second clamping plate is rotatably mounted on the second bottom plate, the first clamping plate is in drive connection with the first bag opening motor, the second clamping plate is in drive connection with the second bag opening motor, the first magnetic attraction portion is arranged on the first bottom plate, the second magnetic attraction portion is arranged on the second bottom plate, and the second bottom plate is mounted on the horizontal drive assembly in a manner of being capable of horizontally moving; thus, automatic bagging can be achieved, the problems that a trash bag falls off, and a bag opening cannot be opened are solved, the performance is stable and reliable, the structure is ingenious and compact, production and machining are easy, the cost is low, and the market competitiveness is high.
Owner:珠海方瑞智能科技有限公司

Method for modifying superfine fiber synthetic leather based on amino-terminated hyperbranched polymer

ActiveCN102493194ALarge amount of bindingStable performanceFibre treatmentChemistryAcid hydrolysis
The invention discloses a method for modifying superfine fiber synthetic leather based on an amino-terminated hyperbranched polymer. The amino-terminated hyperbranched polymer is introduced into superfine fiber synthetic leather base cloth subjected to moderate acid hydrolysis through a cross-linking agent capable of crosslinking with amino and carboxyl to increase amino active groups, and then the cross-linking agent is added again to crosslink with gelatin hydrolysate to improve binding capacity of the gelatin hydrolysate and remarkably increase hydrophilic groups inside the base cloth. Simultaneously, a conventional natural leather processing technology is adopted to perform dyeing, grease adding, coating, middling and other operations to modified base cloth, and an imitated natural leather product with performance nearly equal to the natural leather performance is produced. By means of the method, hygienic performance and dyeing performance of products are nearly equal to those of the natural leather, and the products have elasticity, fullness and natural appearance of natural leather products. Simultaneously, the method does not relate to organic solvents, thereby solving the problem that a large number of organic solvents are used in the finishing process after existing superfine fiber synthetic leather is synthetized.
Owner:路亚科消防车辆制造有限公司

High-power base plate effectively integrating circuit board and radiator and manufacturing method thereof

The invention discloses a manufacturing method of a high-power base plate effectively integrating a circuit board and a radiator, belongs to the field of electronic printing circuit board and electronic element radiation, and particularly discloses the high-power base plate effectively integrating the circuit board and the metal radiator and having higher radiating performance and the manufacturing method thereof. The structure of the high-power base plate comprises a metal heating panel (1), and is characterized in that: a heat-conducting and insulating ceramic circuit layer (2) is coated on the metal heating panel (1); a copper foil circuit (3) is arranged on the heat-conducting and insulating ceramic circuit layer (2); a welding spot (5) is arranged on the copper foil circuit (3); and waterproof insulating paint (6) is sprayed onto the areas, except the welding spot (5) and an electronic element mounting area (4), on the surface of the metal heating panel (1). Compared with the prior electronic element radiation mode, the high-power base plate is high in heat-radiation efficiency and stable in performance, and has cheap and readily available raw materials. The method is evolved from the traditional mature process and is suitable for mass production.
Owner:周波

Optical fiber-wireless mixed type sensing monitoring system

The invention relates to an optical fiber-wireless mixed type sensing monitoring system relating to the technical field of optical fiber sensing networks and wireless sensing networks and aiming at solving the problems of large size, high cost, high power consumption, difficult realization of small-size and high-integration wireless optical fiber sensing of an optical interference demodulation or wavelength detection device of the traditional wireless optical fiber sensing system. The optical fiber-wireless mixed type sensing monitoring system comprises a pump light source, an isolator, a wavelength division multiplexer, a multi-longitudinal mode optical fiber laser sensor, a photoelectric detector, a No.1 amplifier, a No.2 amplifier, a wireless transmitting device, a wireless receiving device and a frequency meter, wherein the pump light source is connected to the input end of the isolator; the isolator is connected with the wavelength division multiplexer; and the wavelength division multiplexer is connected with the multi-longitudinal mode optical fiber laser sensor. In the invention, an optical demodulation part in the technology does not needs the huge optical interference demodulation or wavelength detection device, and the demodulation of an optical fiber sensor can be realized by utilizing the photoelectric detector and the frequency meter, and therefore, an all-electronic demodulation-wireless transmission process is realized; and in addition, the invention is suitable for the technical field of the optical fiber sensing networks and the wireless sensing networks.
Owner:HEILONGJIANG UNIV

Attitude tilting angle estimation method suitable for precise operation of agricultural machine

The invention discloses an attitude tilting angle estimation method suitable for precise operation of an agricultural machine. The attitude tilting angle estimation method comprises a self-adaptive Kalman filtering attitude fusion algorithm for estimating inherent zero offset of an MEMS (Micro-electromechanical System) gyroscope and an accelerometer and combining with a gyroscope second-order AR (Auto Regression) error model. The attitude tilting angle estimation method comprises the following steps: estimating measurement errors phierr1, phierr2, thetaerr1 and thetaerrr2 of an X-axis gyroscope and a Y-axis gyroscope by adopting an AR model to serve as state input quantities for Kalman filtering, and adaptively estimating a measurement error covariance matrix R; establishing a system external development Kalman filtering state equation and a measuring equation containing six state vectors and two observation vectors; adaptively adjusting a process error covariance matrix Q by means of a space geometric model of a triaxial accelerometer. According to the attitude tilting angle estimation method disclosed by the invention, the inherent zero offset of the gyroscope and the accelerometer is considered, and the condition of introducing system errors during attitude estimation can be avoided; by means of the second-order AR error model, the influence of random errors of a random gyroscope on attitude estimation can be avoided; by using an adaptive Kalman filtering system equation, attitude estimation precision in different states can be ensured.
Owner:SOUTH CHINA AGRI UNIV
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