38results about How to "Avoid mechanical vibration" patented technology

The invention provides a mechanical resonance detecting device. The mechanical resonance detecting device is characterized in that the device comprises a sensor, an analog-digital conversion unit, an MCU, an interface unit and a power unit which is used for supplying electricity to the sensor, the analog-digital conversion unit and the MCU; the output end of the sensor is connected with the input end of the analog-digital conversion unit, and the sensor comprises a uniaxial piezoelectric simulation accelerometer used for sampling the acceleration magnitude of a vibration detected body; the input end of the analog-digital conversion unit is connected with the output end of the sensor; the input end of the MCU is connected with the output end of the analog-digital conversion unit; the interface unit comprises an RS485 bus, a CAN interface and a switching circuit which are all connected with the MCU. The invention further provides a corresponding mechanical resonance detecting method. By means of the mechanical resonance detecting device and method, the vibration data of the vibration detected body can be obtained in real time, the resonant frequency can be pre-judged in advance according to the resonance triggering condition, and in the system with the changed mechanical inherent frequency, the device and method are simple, reliable and high in adaptability.

An inverter device is provided with a semiconductor device, an input terminal, an intermediate terminal, an output terminal and an insulated substrate on which the semiconductor device, the input terminal, the intermediate terminal and the output terminal are mounted. Each of the input terminal, the intermediate terminal and the output terminal is an separated module such that one of the input terminal, the intermediate terminal and the output terminal is spatially independent from the other.

An acoustic monitoring system that is able to verify the success or failure of the positional adjustment of a valve without the need for additional energy during non-invasive reprogramming is provided. The acoustic monitoring system includes a programmer for generating a sequence of commands to adjust the valve mechanism, and for receiving acoustic signals for analysis, a transmitter to implement the command and adjust the valve, and a sensor for detecting an acoustic signal generated from the valve during execution of the commands. A method for using the acoustic monitoring system is also provided.

The invention provides an integrated two-speed transmission electric drive assembly system and an application method. The integrated two-speed transmission electric drive assembly system comprises a driving motor, a first brake, a second brake, a double-row planetary gear mechanism and a final reduction drive and differential assembly, wherein the output shaft of the driving motor is connected toa front-row planetary carrier through a spline; a front-row ring gear and a rear-row ring gear are integrated into one; a rear-row sun gear is connected to the front-row planetary carrier; steel plateassemblies of the first brake and the second brake are engaged with a gearbox body; a friction plate assembly of the first brake is engaged with an outer ring gear; the friction plate assembly of thesecond brake is engaged with the extension end of a front-row sun gear; and the output end of a rear-row planetary carrier is connected to the input shaft of the final reduction drive and differential assembly and outputs power to wheels. The integrated two-speed transmission electric drive assembly system decreases the axial dimension of a powertrain and decreases the mechanical noise while reducing the difficulty of the arrangement of a whole vehicle. The integrated two-speed transmission electric drive assembly system is compact in whole structure, small in size and light in weight. The design of two-speed transmission enables a motor to work in an efficient range for a long time so as to improve the power performance and economy of the whole vehicle.

The invention provides a ring-screen camera system, comprising: a conical reflector, the conical reflector has a continuous mirror surface, and is placed on a column with the top of the cone downward; a plurality of camera devices, the The camera devices are distributed on the side of the column according to the size of the shooting angle of view, and the shooting angles of each camera device overlap each other; the camera devices shoot upwards; The virtual image is located on the central axis of the conical mirror. The invention innovatively uses a conical reflector in the ring-screen camera system, and adopts the conical reflector to collect images, which can make the pictures collected by adjacent cameras have a certain overlapping area, thereby ensuring that the images can be captured by the computer. Adjacent images are merged to form a panoramic screen.

A full automatic atmospheric polarization mode image acquisition system and a system control method are characterized in that the system comprises a polarization imaging module, a mechanical movement module, a brightness acquisition module and a system control and processing center; and the system control and processing center respectively controls the rotation angle of a base and the lift heightof a worm in the mechanical movement module through a controller and records and processes the light intensity information acquired by a light intensity detector and the polarization image of sky area acquired by the polarization imaging module in a CCD camera. The invention has simple operation, accurate measurement result which is easy to calibrate, and does not need to mechanically rotate a polaroid sheet in the measurement process.

A sub-cranial vibratory stimulator that at least partially bypasses a recipient's skull bone and delivers vibration to fluid within a recipient's skull bone. The sub-cranial vibratory stimulator comprises an actuator that is configured to be implanted beneath a recipient's skull bone. The actuator transfers vibration to the fluid within the recipient's skull without first passing through the skull bone. The actuator is also substantially mechanically decoupled (isolated) from the recipient's skull bone.

The invention discloses an air conditioner compressor rotational speed fluctuation suppressing method. The method includes the following steps that: when an air conditioner compressor operates under a given rotational speed, a sinusoid represents by an equation that S(t)=Asin (omegat+P) is constructed; the amplitude A in the above equation is set as A=K*deltaIq / deltaN; the value of the amplitude A is kept constant, and the value of the initial phase P is adjusted, and an initial phase P under minimum speed fluctuation recorded, and the initial phase P at this moment is an optimal compensation phase; the value of K is adjusted according to the initial phase P under the under minimum speed fluctuation, and the adjustment value of K under the under minimum speed fluctuation is recorded, and a corresponding amplitude A is an optimal compensation amplitude; and the rotation speed N is adjusted, and the above steps are repeated, so that a plurality of groups of optimal compensation points are obtained; and when an air conditioner compressor operates, if the set rotation speed N is an optimal compensation point, a corresponding optimal amplitude A and initial phase P are selected, and if the set rotation speed N is not an optimal compensation point, a point insertion method is adopted to calculate an optimal amplitude A and an initial phase P at the set rotation speed N. With the air conditioner compressor rotational speed fluctuation suppressing method of the invention adopted, the problem of speed fluctuation caused by the cyclical pulsation of the load torque of the air conditioner compressor can be solved.

The invention discloses a motor control method and a motor control system of a vehicle and belongs to the motor control field. The motor control system comprises a driving state judge unit and a space vector control unit, wherein, the driving state judge unit is used for judging the starting state, the low-speed and large-load running state or the normal driving state of the vehicle in real time; and based on the judgment results of the driving state judge unit, the space vector control unit controls the motor to output equivalent square wave phase current when the vehicle is in the starting state or the low-speed and large-load running state, and the space vector control unit controls the motor to output sinusoidal wave phase current when the vehicle is in the normal driving state, so as to achieve the purposes of large starting torque and low running noise of the vehicle, avoid the mechanical vibration of the motor which is driven by the square wave for a long time and prolong the service life of the motor.

The invention provides an integrated two-speed transmission electric drive assembly system and an application method. The integrated two-speed transmission electric drive assembly system comprises a driving motor, a first brake, a second brake, a double-row planetary gear mechanism and a final reduction drive and differential assembly, wherein the output shaft of the driving motor is connected toa front-row planetary carrier through a spline; a front-row ring gear and a rear-row ring gear are integrated into one; a rear-row sun gear is connected to the front-row planetary carrier; steel plateassemblies of the first brake and the second brake are engaged with a gearbox body; a friction plate assembly of the first brake is engaged with an outer ring gear; the friction plate assembly of thesecond brake is engaged with the extension end of a front-row sun gear; and the output end of a rear-row planetary carrier is connected to the input shaft of the final reduction drive and differential assembly and outputs power to wheels. The integrated two-speed transmission electric drive assembly system decreases the axial dimension of a powertrain and decreases the mechanical noise while reducing the difficulty of the arrangement of a whole vehicle. The integrated two-speed transmission electric drive assembly system is compact in whole structure, small in size and light in weight. The design of two-speed transmission enables a motor to work in an efficient range for a long time so as to improve the power performance and economy of the whole vehicle.

The present invention discloses a terminal assembly with a cable and a connector assembly. The terminal assembly with the cable of the present invention has a terminal assembly including a connecting terminal, a shielding shell and an insulator arranged between the connecting terminal and the shielding shell; and a cable including a shielding layer. One portion of the shielding shell in the terminal assembly and one portion of the shielding layer in the cable form a mutual overlapping region along the radial direction of the cable. In the mutual overlapping region, the shielding layer is electrically connected with the shielding shell. The terminal assembly of the present invention is applicable to automobiles as a high-voltage connector. In its use in an automobile, the terminal assembly is capable of effectively resisting shock and preventing mechanical vibration from causing separation of the connector to affect safe use.

An exposure system and an exposure method. The method comprises: arranging a micro-reflector array (4) between a uniform light unit (3) and a reflector (5) to replace a variable slit apparatus; according to the pattern of a mask plate (7) during exposure and the requirements for exposure precision, setting parameters of an exposure field of view; and inputting same into drive software of the micro-reflector array (4), so as to calculate motion parameters of the micro-reflector array (4) during the exposure. During the exposure, a control card continuously sends an instruction to each digital micro-mirror in the micro-reflector according to data in the drive software, and each digital micro-mirror takes a corresponding flipping action each time the instruction is received until the exposure ends. The micro-reflector array (4) has thousands of digital micro-mirrors, so that the exposure field of view, range and dose are changed in real time, thereby avoiding the mechanical vibration generated by a traditional variable slit apparatus when changing the shape of the slit and the requirements for the high acceleration of a slit apparatus drive system, and reducing the complexity of an exposure system mechanical structure and a control system.

An inverter device is provided with a semiconductor device, an input terminal, an intermediate terminal, an output terminal and an insulated substrate on which the semiconductor device, the input terminal, the intermediate terminal and the output terminal are mounted. Each of the input terminal, the intermediate terminal and the output terminal is a separated module such that one of the input terminal, the intermediate terminal and the output terminal is spatially independent from the other.

The invention discloses a high-precision medium-speed wire cutting device, and relates to the technical field of medium-speed wire cutting, the high-precision medium-speed wire cutting device comprises a mounting base, an adjusting mechanism and a workbench, the adjusting mechanism is mounted on one side of the mounting base, the workbench is fixed on one side of the adjusting mechanism, a transmission cavity is fixedly mounted on one side of the mounting base, and the transmission cavity is fixed on the other side of the mounting base. A wire releasing mechanism and a wire collecting mechanism are rotationally installed on one side of the transmission cavity, and a detection mechanism is fixed to one side of the transmission cavity. According to the scheme, the stabilizing assembly can deviate along with the deviation direction of the molybdenum wire, then the tension spring installed on one side of the stabilizing assembly is stretched along with the deviation direction of the stabilizing assembly, the bent pipe is in an L shape, and a water source is located at the bent diameter position in the bent pipe and slides from the sliding rod to drive the floating plate to slide; the molybdenum wire is stored and scoured on the surface of the second induction sheet fixed at the inner diameter pipeline of the bent pipe to generate induction, contact type induction is performed on the molybdenum wire, rapid reaction is performed on the reaction of the molybdenum wire, and the accuracy during detection is ensured.

The invention relates to the technical field of ultrasonic imaging, in particular to a numerical control type low-intensity focused ultrasonic excitation and imaging system. The system comprises a detection probe, wherein the detection probe comprises an imaging transducer, and the detection probe further comprises a spherical-crown-shaped focusing multi-array emitter, the imaging transducer is arranged at the center of the focusing array emitter, and a three-dimensional focus is formed when the focusing array emitter performs focusing in vivo. The numerical control type low-intensity focusedultrasonic excitation and imaging system is based on the digital control technology, and three-dimensional focusing is performed through the spherical-crown-shaped focusing multi-array emitter, so that the focusing range is clearer, and the positioning range and the accuracy of the positioning position are increased during focusing positioning.