36 results about "Inertia" patented technology

The improvement includes an outer proof mass having a corresponding center of mass; and an inner proof mass having a corresponding center of mass, where the corresponding centers of mass of the outer proof mass and the inner proof mass are approximately co-located. Thus, a double Foucault pendulum is essentially provided in a micromachined gyroscope.

The invention discloses a method for correcting feedback of an inertial navigation system/global position system (INS/GPS) combined navigation system based on lever arm estimation. The method comprises the following steps of: extending a lever arm error to a system error state vector for estimation, judging whether a random error of an inertial device is accurately estimated through comparing whether the difference between a lever arm estimation value and a true value exists in an error threshold range, wherein the error of the inertial device is effectively estimated when the error of the lever arm estimation value is smaller than a set threshold value, measured outputs of a gyroscope and an accelerometer are corrected by utilizing the error of a random constant of the estimated inertial device, and unity feedback correction is performed during combined Kalman filtering, otherwise, feedback correction is not carried out on the error of the inertial device. According to the method, the error of the random constant of the inertial device can be subjected to effective estimation and unity feedback correction, and the precision of the INS/GPS combined navigation system can be effectively improved.

A method and apparatus for managing movement. A navigation system comprises a first inertial measurement unit enabled global positioning system device having a first inertial measurement unit with a first level of accuracy in a first vehicle and is configured to provide first information that identifies a position of the first vehicle relative to a second vehicle. The navigation system further comprises a second inertial measurement unit enabled global positioning system device in the first vehicle having a second inertial measurement unit with a second level of accuracy that is greater than the first level of accuracy and is configured to provide second information that identifies the position of the first vehicle relative to the second vehicle. The navigation system further comprises a controller that is configured to perform an action based on a desired level of accuracy of the first information.

The invention relates to the technical field of indoor location and navigation and specifically relates to an indoor pedestrian locating system for counting steps based on magnetic field features and accelerated velocity information. The indoor pedestrian locating system comprises a magnetic field and accelerated velocity sensor data acquisition module, an accelerated velocity sensor step counting module, a magnetic field projection module, a magnetic field database training module, an inert sensor and magnetic field fusion module, a geomagnetic matching locating module and an outputting module. According to the indoor pedestrian locating system disclosed by the invention, magnetic field information and accelerated velocity information can be obtained by the magnetic field and accelerated velocity sensor data acquisition module; a magnetic field intensity sequence of a pedestrian in moving can be obtained by the accelerated velocity sensor step counting module, the magnetic field projection module and the inert sensor and magnetic field fusion module; magnetic field data are matched in the geomagnetic matching locating module and the magnetic field database training module to obtain locating results; thus, location can be achieved without installing extra signal emission equipment.

The present invention relates to a shipborne satellite communication system and a method for a shipborne antenna to track a satellite. The shipborne satellite communication system comprises an antenna base, a satellite communication antenna, an MEMS inertial measurement unit and a servo driving unit; the satellite communication antenna is arranged at the antenna base and is used for receiving and transmitting the Ku or L-band communication signals of a geostationary orbit communication satellite or a small-angle geostationary orbit communication satellite; and the MEMS inertial measurement unit is arranged on the antenna base and is used for acquiring the attitude parameters of a hull; and the servo driving unit is arranged on the antenna base and is used for driving the satellite communication antenna to rotate so as to adjust the azimuth angle, pitch angle and polarization angle of the satellite communication antenna. With the shipborne satellite communication system and the method for the shipborne antenna to track the satellite of adopted, the satellite communication antenna can accurately track the satellites in a surge state, the installation complexity of the MEMS inertial measurement unit is decreased. The overall structure of the shipborne satellite communication system is compact, and the size of the shipborne satellite communication system is small.

The invention relates to a dynamic effect device for gas-gun testing materials and a testing method. The dynamic effect device is characterized by comprising a cylindrical gun barrel and a cylindrical shell in a gun barrel body, wherein a high-pressure gas inlet is formed in one end of the gun barrel, and the opening of the other end of the gun barrel is provided with a material block to be tested; a sensor is arranged on the material block to be tested, and a rubber ring is arranged on the outer periphery of the cylindrical shell to seal the gun barrel. The dynamic effect device has the advantages of simple structure and reasonable design and can be used for easily testing the friction force effect and the inertia force effect of materials to be tested.

An electric vehicle three-system integrated test platform belongs to the field of electric vehicles. The electric vehicle three-system integrated test platform is composed of a battery and battery management system, a motor and motor control system, and an industrial personal computer. The battery and battery management system comprises a battery cooling/heating system, a battery management system, and a battery pack. The motor and motor control system comprises a current sensor, a voltage sensor, a motor, a speed/torque sensor, an inertia disc, a dynamometer, a motor controller, and a tension controller. The battery cooling/heating system makes the batteries work within an optimal temperature range. Through the battery management system, the voltage and current of the battery can be monitored, and functions like battery equalization can be achieved. Through the motor and motor control system, the performance and properties of the motor under various conditions can be tested and analyzed. A finished vehicle control system simulates different driving conditions of an electric vehicle so as to test and optimize the regenerative braking control effect.

An object is to increase the mechanical efficiency of an injection molding machine, decrease the inertia, and decrease the axial length. The injection molding machine comprises a cylinder member; an injection member disposed within the cylinder member such that the injection member can advance and retract; an injection motor (82); and a transmission shaft which is connected to the injection member such that the transmission shaft can rotate relative to the injection member. The transmission shaft has a rotation transmission portion, to which rotation of the injection motor (82) is transmitted, as well as a motion conversion portion for converting rotational motion to linear motion. The injection motor (82) and the transmission shaft are disposed on the same axis, and the transmission shaft is advanced and retracted inside the rotor (92) of the injection motor (82). In this case, since rotation of the injection motor (82) is transmitted directly to the transmission shaft without intervention of a speed reduction mechanism, a pulley, and the like, mechanical efficiency can be improved, and inertia can be decreased. Further, the time required for changeover from the injection stage to the pressure holding stage is shortened. Since the transmission shaft is advanced and retracted inside the rotor (92) of the injection motor (82), the injection molding machine can be reduced in axial length.

The invention discloses a method for dynamically measuring the rigidity of a silicon balance spring and rotational inertia of a balance wheel and a measurement device. The method comprises the following steps of A, adjusting a measurement state to a vibration state similar to the work of a watch and be close to the working frequency of the watch; B, dynamically measuring the vibration periods TB and TY of a balance wheel and balance spring vibration system; C, calculating the rotational inertia of the balance wheel to be measured and the rigidity of the balance spring to be measured, wherein the rotational inertia JB of a standard balance wheel in a swing body and the rigidity MB of a standard balance spring in the swing body are known; in FORMULA (1) and FORMULA (2), wherein M represents the rigidity of the silicon balance spring to be measured, and J represents the rotational inertia of the balance wheel to be measured. The method has the beneficial effects that the balance wheel and balance spring vibration system consisting of the balance spring and the swing body executes measurement under the condition of same working condition, so that the influence, which is caused by nonlinear errors, on the measurement is eliminated, the measurement speed is high, and the precision is high; the method belongs to a dynamic measurement method. Furthermore, the rigidity of the balance spring and the rotational inertia of the balance wheel can be measured through an instrument by only replacing the swing body.

Optical block assemblies having single or multi-stage folded light path lens assemblies that may be implemented to allow an optical block assembly to occupy significantly less space and/or present reduced rotational inertia to an electrical articulating mechanism. An optical assembly may be so configured for closed circuit television applications or in any other suitable video imaging application including, but not limited to, applications involving non-articulated or articulated cameras such as normal filming (e.g., motion picture film cameras or studio television cameras), camcorders, military targeting or imaging devices, etc.

The invention relates to a Hall type magnetic fluid acceleration sensor. The Hall type magnetic fluid acceleration sensor comprises a left end cover, a second permanent magnet, a shell body, a first Hall element, a first permanent magnet, a second Hall element, a third permanent magnet, a right end cover and magnetic liquid, wherein the shell body is of a cylindrical tubular structure, the first permanent magnet is arranged in the middle of interior of the shell body, and both ends of the first permanent magnet are adsorbed with the magnetic liquid in a saturated manner; the second permanent magnet is placed at a left port of the shell body, and a third permanent magnet is placed at a right port of the shell body; and both ends of the shell body are provided with the left end cover and the right end cover separately through threaded connection. The Hall type magnetic fluid acceleration sensor adopts the permanent magnets fixed on both ends of the shell body to provide restoring forces for intermediate inertia mass, the measuring range and measuring sensitivity of the sensor can be adjusted by changing parameters of the permanent magnets on both ends, different requirements on the measuring range and measuring sensitivity of the sensor on different occasions can be met, and the adaptability of the sensor is improved.

The invention relates to an inertia brake, which comprises a slide rail system, a large car bottom platform and a small car platform, both the large car bottom platform and the small car platform are located upon the slide rail system, the small car platform is mounted under the large car bottom platform, the slide rail system comprises a base plate, two large slide rails are symmetrically arranged on the left side and right side of the top end surface of the base plate, two small slide rails which are parallel to the two large slide rails are symmetrically arranged between the two large slide rails, friction plates which are arranged along the length direction of the large slide rails are mounted on the inner sides of the two large slide rails, the large car bottom platform is mounted on the two large slide rails, and the small car platform is mounted on the two small slide rails. The inertia brake has the advantages of reasonable structure design, low manufacturing cost, good braking performance and the like, and can perform braking by means of inertia, thus preventing safety accidents caused by the high inertia of large rail cars; since the friction plates are adopted to replace the conventional braking method with a railway as a friction braking object, the railway is protected well, and running safety is ensured.

A method for determining the driving state of a vehicle comprises the following steps:

• • detecting (21) first measurement signals of a first inertial measurement sensor system (1, 100), wherein the first inertial measurement sensor system is arranged in a first region of the vehicle so that it does not execute a relative movement in relation to the first region of the vehicle, and wherein the first measurement signals correspond to at least one acceleration component in three-dimensional space and/or at least one rotation rate component of the first inertial measurement sensor system (1, 100) in the first region of the vehicle in three-dimensional space;
  • detecting (21) second measurement signals of a second inertial measurement sensor system (2, 100), wherein the second inertial measurement sensor system is arranged in a second region of the vehicle, which is movable in relation to the first region of the vehicle, wherein it is arranged so that it does not execute a relative movement in relation to the second region of the vehicle, and wherein the second measurement signals correspond to at least one acceleration component in three-dimensional space and/or at least one rotation rate component of the second inertial measurement system (2, 100) in the second region of the vehicle in three-dimensional space;
  • analyzing (22, 23, 24, 25) the first and second measurement signals based on the functional relationship between the movement of the first inertial measurement system and the movement of the second inertial measurement sensor system; and
  • based on the result of the analysis of the first and second measurement signals, determining (26) the relative orientation of the two inertial measurement sensor systems to one another.

The invention discloses a method for calculating the resistance of an SCR denitration catalyst in the technical field of computer-aided engineering. The method comprises the following steps: establishing a mesoscopic three-dimensional model of the SCR denitration catalyst; performing grid division on the mesoscopic model; analyzing the model after grid division to obtain a resistance value of theSCR denitration catalyst under a mesoscopic condition; fitting the obtained resistance value to obtain a resistance calculation formula of the SCR denitration catalyst; establishing a macroscopic model of the SCR denitration catalyst, and obtaining an inertia resistance coefficient and a viscous resistance coefficient based on a resistance formula obtained through fitting; and carrying out numerical simulation analysis based on the macroscopic model to obtain the resistance value of the SCR denitration catalyst. Macroscopic and microscopic combined multi-scale numerical simulation is applied to the SCR denitration catalyst, so that the consumption of computer resources is greatly reduced, and the calculation efficiency is improved.

The invention belongs to the field of positioning navigation time (PNT), and particularly relates to an integrated micro PNT unit comprising a central micro clock module and an outer micro inertia module, wherein an anchor point of the central micro clock module is located at the center, a plurality of circles are distributed outside the anchor point, radial short beams are uniformly distributed between the circles, and outer electrodes are distributed at the outermost periphery. During operation, stable control is realized by electrostatic force action and closed-loop feedback, and stable frequency information is provided externally; the annular anchor point of the micro inertia module is located at the center, the circles are located on the outer side, the composite beams are evenly distributed between the circles and the annular anchor point, the inner and outer sides of the circles are evenly distributed with plane outer electrodes and plane inner electrodes, and the upper and lower surfaces of the circles are distributed with off-plane electrodes, thereby realizing the sensitivity of X, Y, Z three-axis acceleration input and X, Y, Z three-axis angular motion input. The integrated micro PNT unit can be realized by the MEMS planar process as a whole without involving multi-layer stacking and precision assembly on a microscopic level, and the process is relatively simple.

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 relates to a transmission shock absorber which comprises an input motor rotor, an input disc and an input flange. The motor rotor is connected with the input disc. The input flange is connected to an input flange cover through a bolt connecting piece and connected with an input gear through a connecting device. A connecting disc in the connecting device is communicated with the inner center of the input flange. The two ends of the connecting disc are in contact with the inner wall of the input gear and the connecting disc is connected and fixed through a bolt penetrating through the inner center of the whole input flange. The input disc and the input flange cover are connected through a damping spring device. An elastic piece is arranged at the step end of the input disc in a sleeved mode and fixed to the input disc through a connecting piece. The elastic end of the elastic piece is pressed on the damping spring device. The transmission shock absorber has the advantages that the input disc and the input flange cover are elastically connected, so that large rotational inertia of the motor rotor is isolated and gear shift impact is reduced; meanwhile, parameters of the shock absorber are dynamically simulated through a transmission system, actually-collected data are substituted to conduct optimal computation, so that the effect is remarkable, noise of a motor and vibration caused by a transmission are reduced, a transmission shell is not damaged, and therefore the gear shifting quality and the automobile driving performance are improved.

A delay phase calibration method for an improved alpha-beta scanning method comprises steps of: performing scanning imaging on an orthogonal grid grating sample by using an alpha-beta scanning method,namely, using sinusoidal signals with the operating frequency is f and initial phases being respectively 0 and [Pi]/2 to control a galvanometric vibrating mirror system to deflect the laser beam to scan; confirming the scanning image rotation angle [Theta] according to the relative positional relationship between the scanned image reconstructed using the target trajectory and the target image, and converting the angle value [Theta] into the radian value [Phi], wherein [Phi] is the size of the delay phase when the frequency is f; repeating the above measurement processes to obtain the delay phase size [Phi]k at different frequencies fk; and finally, according to the plurality of sets of measurement results, fitting the f-[Phi] function relationship, namely, the relationship between the scanning frequency and the phase delay function, and completing the delay phase calibration for the improved alpha-beta scanning method. The delay phase calibration method provided by the invention accurately determines the phase delay size and corrects the phase delay due to the inertia of the vibrating mirror system in advance.

An impact wrench includes a housing, a rotation motor, an output shaft, and an impact mechanism including an inertia drive member with an impact chamber, a drive socket coupling the drive member to the motor, and anvil formed integral with an output shaft and extending into the impact chamber, and a coupling member arranged to transfer kinetic energy from the drive member to the anvil, a lubricant provided in the impact chamber, and barrier forming cover element mounted on the drive member to seal off the impact chamber and prevent lubricant from being expelled from the impact chamber at rotation of the drive member.

The invention provides a building keel. The building keel comprises an n-shaped galvanized steel sheets, square pillars and bolts, wherein the hollow portions of the n-shaped galvanized steel sheets are filled with the square pillars, and the bolts are used for fixing the n-shaped galvanized steel sheets and the square pillars. Flangings are arranged on the two sides of openings of the n-shaped galvanized steel sheets, bolt holes for mounting of the square pillars are further formed in the two side edges of the n-shaped galvanized steel sheets, and the n-shaped galvanized steel sheets and thesquare pillars are connected through the bolts. Water storing grooves are formed in the flangings of the n-shaped galvanized steel sheets. The adopted steel wood keel is large in section inertia, highin stress performance, moderate in price and capable of improving corrosion resistance and stability and can be widely applied; the steel-wood-integrally-combined n-shaped steel-wood keel can bring the material characteristic into play to the utmost extent and increase the strength-weight ratio; and nailing is facilitated in formwork erecting through the inlaid square pillars, meanwhile the inlaid square pillars are effectively protected through the peripheral bent n-shaped beam steel sheets, the loss of the square pillars is greatly reduced, the project cost is reduced, and environment protection is achieved.