7 results about "Mechanical system" patented technology

The invention relates to a method, a device and a system for measuring a mechanical beam rigidity of a capacitive MEMS (Micro-Electro-Mechanical System) accelerometer. The method comprises: applying apreload voltage to the accelerometer, wherein the preload voltage comprises a first preload voltage and a second preload voltage; acquiring a first voltage change amount output by the accelerometer at the first preload voltage when the acceleration experienced by the accelerometer changes, and acquiring a second voltage change amount output by the accelerometer at the second preload voltage whenthe acceleration experienced by the accelerometer changes; and obtaining the mechanical beam rigidity of the accelerometer according to a first electrostatic negative rigidity of the first preload voltage, a second electrostatic negative rigidity of the second preload voltage, the first voltage change amount and the second voltage change amount. According to the method, the device and the system for measuring the mechanical beam rigidity of the capacitive MEMS accelerometer, the influence of the parameters, of the traditional measuring technology, such as displacement capacitance conversion coefficient, inertial mass block quality, etc., on the measurement precision when measuring the mechanical beam rigidity can be avoided, so that the measurement precision of the mechanical beam rigidityof the accelerometer is improved.

The invention discloses a modeling method of a bond-graph-based movable mechanical arm system. The method comprises the steps of 1, constructing a driving motor and transmission mechanism bond graph model; 2,constructing a double-wheel differential type mobile robot mechanical system bond graph model; 3, constructing a series connection type mechanical arm mechanical system bond graph model; 4, according to the robot freedom degree, connecting the bond graph models established in step 1, step 2 and step 3, and establishing a complete robot system bond graph model by considering the force-bearing relationship between the system and the ground; 5, deriving a mathematic model according to the bond graph model; and 6, conducting system simulation and analysis according to the model. By means of the modeling method, errors caused by the operation that modeling and control are conducted on a mobile robot and a mechanical arm separately, but the coupling relationship between the mobile robotand the mechanical arm is neglected are avoided; the bond graph method is adopted, modeling and simulation problems of a robot system combining multiple energy forms are solved in a unified manner; and rapidness and precision of dynamics modeling, simulation and analysis of the robot system are improved.

The invention discloses a small liquid cooling system driven by electro-hydraulic micropumps and a method. The system comprises a liquid cooling block filled with liquid working fluid and a heat exchanger filled with liquid working fluid. An outlet of the heat exchanger is connected with an inlet of the liquid cooling block through a first loop pipeline. A first electro-hydraulic micropump is connected into a pipe of the first loop pipeline in series. An outlet of the liquid cooling block is connected with an inlet of the heat exchanger through a second loop pipeline. A second electro-hydraulic micropump is connected into a pipe of the second loop pipeline in series. The liquid cooling system not only solves the high-efficiency cooling problem of a large power electronic device, but also overcomes the defects of conventional mechanical pumps, such as large sizes, high power consumption, large noise, inaccurate flow control, etc. The system has advantages such as no moving parts, reliable operation, low power consumption, easy manufacturing and no need for maintenance. The system can be integrated with chips or channels directly and does not need independent space. The system can be applied to electronic cooling, drug transportation, micro-electro-mechanical system and other fields.

The invention discloses a parallel assembly method, device and equipment for a complex optical-mechanical-electrical system and a medium. The parallel assembly method comprises the steps that data acquisition is carried out on an assembly object in a physical space to perfect a calculation model in a digital space; in the assembling process, performance testing is conducted on an assembling link in the physical space, an assembling performance index corresponding to the physical space is obtained, and an assembling performance index corresponding to the digital space is obtained through simulation calculation; according to the assembling performance indexes, assembling error calculation and compensation parameter distribution are carried out through a calculation model, the compensated assembling performance indexes are predicted, and an optimal compensation scheme is determined. According to the scheme, the assembly process in the physical space is guided to be adjusted. According tothe method, the two parallel virtual and real worlds of the physical space and the digital space are associated and guided mutually, the calculation model is subjected to assembly error calculation, the assembly process in the physical space is guided reversely, and the whole process is measurable, controllable, visual, stable in performance and high in efficiency.

The invention relates to a multifunctional top holder which can be automatically unfolded and folded. The multifunctional top holder comprises a mechanical system and a control system, wherein the mechanical system comprises a transmission device, an unfolding device and a fixing device, wherein the transmission device is a device capable of realizing ordered unfolding of the front, rear, left and right faces of the top holder, and comprises a first incomplete bevel gear (1), a second incomplete bevel gear (21) and a plurality of synchronizing wheels; the motor unfolds front and rear rods simultaneously through a first synchronizing wheel (9) and a second synchronizing wheel (24); the first incomplete bevel gear and the second incomplete bevel gear produce timeliness so that the unfolding of a side rod is delayed; and the unfolding device is formed in a combination way of six rods, and is capable of realizing unfolding and folding of the front and rear rods in a certain movement rule under the driving of a second shaft (4), a third shaft (23), the fourth synchronizing wheel (14) and a fifth synchronizing wheel (32). The multifunctional top holder is low in weight, convenient for demounting, low in price, and capable of effectively protecting a vehicle body and prolonging the service life of the vehicle body.

The invention discloses a human body movement power generation device for a gymnasium and a manufacturing method thereof, the power generation device is composed of a mechanical system and a lithium battery charging power supply system, the mechanical system is formed by combined transportation of a driving assembly and a driven assembly, the driving system is a movement driving system, and the driven system is a gear pump driving hydraulic system; the gear pump driving hydraulic system is actually a gear pump driving system which is driven by a driven gear and used for pushing liquid in the liquid flow pipeline to flow in the fixed direction. Liquid in the liquid flow pipeline is specifically magnetic fluid, magnetic induction coils are arranged at the corresponding positions of the two sides of the pipeline carrying the magnetic fluid, and the lithium battery charging power supply system is connected with the magnetic induction coils through a power adapter arranged in the lithium battery charging power supply system. The human body movement power generation device is high in mechanical energy conversion efficiency, convenient to maintain, good in fitness effect, capable of protecting joints and easy to popularize.