30results about How to "Real-time monitoring of speed" patented technology

The invention discloses a crankshaft three-dimensional vibration measurement device capable of calibrating a crankshaft corner signal. A photoelectric encoder is fixed in the center hole of a stop block by a bolt, and the stop block is also fastened on the end face of a casing by the bolt. A pair of ball bearings is arranged between the casing and a transmission shaft, and the exterior ends of the ball bearings are fixed on the casing by a fastener bolt and a fastening check ring. The exterior end of the stop block is provided with a three-dimensional vibration sensor. The photoelectric encoder is connected with the transmission shaft by a connecting shaft to rotate synchronously and outputs two voltage signals which are respectively used for carrying out the torsional vibration analysis and the top dead centre calibration of a crankshaft. In the invention, bending vibration under different corners of the crankshaft can be decomposed, and synthesis is carried out on the rotating coordinate system of the crankshaft at a position corresponding to the corner of the crankshaft, so that the measurement of the rotating coordinate system of the crankshaft can be realized, bending vibration consistent to the rotating coordinates of the crankshaft is obtained by software calculation, and real-time monitoring can be carried out on an engine in terms of the revolution speed and the revolution number.

The invention discloses a server fan speed control system and method. The server fan speed control system comprises a BMC, an SAS card connected with the BMC, a back board connected with the SAS card,a CPLD mounted on the back board, and hard disks connected with the back board; a PBSI module is arranged in the SAS card; the BMC is connected with the SAS card and the CPLD through I2C buses; the SAS card is connected with the back board through an SAS wire cable; and the hard disks are connected with the back board through an SATA or SAS interface. Compared with the prior art, the temperaturesof the hard disks can be monitored accurately in real time to adjust a fan speed.

The invention discloses a control method of a rotating motor, which is used for controlling the rotating motor in a machine table rotating device of semiconductor equipment. The control method of a rotating motor comprises the following steps of: a speed setting step of setting a target rotating speed before executing a process menu, and determining whether the speed setting is successful or not by acquiring the rotating speed fed back by the rotating motor in real time; a rotating speed maintaining step for maintaining the rotating speed of the rotating motor in the process of executing the process menu; and a step of reducing the speed and returning to the original point, namely reducing the speed of the rotating motor and returning to the original point after the process menu is executed, and determining whether the rotating motor returns to the original point successfully by acquiring the state fed back by the rotating motor in real time and detecting whether the rotating motor islocated at the original point position or not. In the speed setting step before the process menu is started and the speed reduction original point returning step after the process menu is ended, closed-loop control is adopted for the rotating motor, it is ensured that a control command of the rotating motor is successfully executed, and control over the rotating motor is safer, more reliable and more stable.

The invention discloses a rotary speed reducer and a rotary speed reducer for walking, and relates to the technical field of speed reducers. The rotary speed reducer comprises an input spline sleeve connected with an output spline shaft through a planet mechanism assembly, wherein a cooling mechanism is arranged near the input spline sleeve; and the cooling mechanism is used for forcedly refrigerating lubricating oil in a box body of the rotary speed reducer. The technical problem that a rotary speed reducer in the prior art cannot serve as a walking speed reducer can be solved through the rotary speed reducer.

The invention discloses an electric underwater aircraft navigation speed measurement method and device based on the Doppler effect.The method includes the steps that noise data generated when an electric underwater aircraft sails are collected; the frequency spectrum of noise data is obtained according to the noise data; a pair of line spectrums on the two sides of the center of the kth-cluster spectral line generated by a motor located in the frequency spectrum is determined according to the noise data; the navigation speed of the underwater aircraft is calculated through the Doppler effect with frequency shift which is k frequency doubling relative to inverter switching frequency.The device comprises an acquisition module, a first processing module, a second processing module and a calculation module.According to the electric underwater aircraft navigation speed measurement method and device based on the Doppler effect, the structure is simple, the motor noise feature that a frequency converter is utilized to supply power is reasonably utilized, and the navigation speed of the electric underwater aircraft is monitored in real time externally.

The invention relates to the technical field of centripetal turbine low-grade heat energy power generation, in particular to a double-turbine direct-driven permanent magnet synchronous generator set. The double-turbine direct-driven permanent magnet synchronous generator set comprises a permanent magnet synchronous generator, a control system and centripetal turbines, wherein a cooling system is arranged on a shell of the permanent magnet synchronous generator; the cooling system comprises a cold water system arranged on the outer side of the shell and a cold air system communicating with the interior of the shell; the control system is used for controlling the displacement state of a rotating shaft of the permanent magnet synchronous generator; the two centripetal turbines are symmetrically arranged at the two ends of the permanent magnet synchronous generator; and a first communicating pipe is connected to an inlet of each centripetal turbine, and a second communicating pipe is connected to an outlet of each centripetal turbine. The double-turbine direct-driven permanent magnet synchronous generator set can effectively offset axial force borne by the generator set, the generator set is free of friction loss and high in motion precision in the operation process, the size of the generator set can be reduced by adopting a direct drive mode, cost is saved, and power generation efficiency is improved.

The invention provides a roller bit with temperature monitoring and cooling functions, and belongs to the technical field of roller bits. The roller bit comprises a bit body, a temperature sensor, a rotating speed sensor, a cooling mechanism and a control system, wherein the bit body is provided with a cavity, a cooling channel is arranged in the bit body, the temperature sensor and the rotating speed sensor are used for monitoring the temperature and the rotating speed of the cone in real time, the cooling mechanism is arranged in the cooling channel and provided with a water spraying assembly which can move in the cooling channel in the height direction of the drill bit body and can stretch out of the upper end of the cooling channel, and the water spraying assembly is used for spraying a cooling liquid to the cone to reduce the temperature of the cone. The control system is arranged in the cavity and used for receiving temperature and rotating speed information and controlling the cooling mechanism to operate. The device has the technical effects that the real-time working temperature and the rotating speed of the roller bit can be monitored in real time in the drilling process of the roller bit, the drill bit is cooled in time, the working state is monitored in time, information is fed back in time, the drill bit is reasonably used, and the service life of the drill bit is prolonged.

The invention relates to an intelligent fuel gas shaping machine. According to the intelligent fuel gas shaping machine, the heating temperature of a roller is controlled by virtue of an air intake regulating valve, the dehumidification speed is controlled by virtue of a dehumidification motor, and the rotation speed of the roller is controlled by virtue of a frequency converter of a driving mechanism; tea shaping process is divided to be realized by a preheating control module, a feeding control module, a process section control module and a discharging control module. According to a computer program established after multiple experiments, and the input process name, one-key automatic operation is realized, and operation of the intelligent fuel gas shaping machine can be finished, and the intelligent fuel gas shaping machine is intelligent, convenient and efficient. In a similar way, the process section can be automatically controlled by multiple time sequence units, so that the shaping effect can be better ensured; in addition, the intelligent fuel gas shaping machine can be provided with a thermocouple, a humidity test instrument and a speed-measurement sensor so as to monitor various process parameters in real time and automatically regulate the process parameters through a control system; a technologist can perform manual setting and regulation according to actual process demands. The intelligent fuel gas shaping machine is especially suitable for shaping operation of high-grade, brand-name and high quality green tea and can be popularized and applied in automatic production line establishment.

The invention discloses a monitoring device for service performance of a water pump. The monitoring device is technically characterized by comprising the water pump, a vibration sensor, a vibration signal processor, a pressure sensor, a pressure signal processor, a temperature sensor, a temperature signal processor, a noise sensor, a noise signal processor, an optical-electric encoder, an optical-electric signal processor, a processor, a display screen and an alarm device. The vibration sensor, the pressure sensor, the temperature sensor, the noise sensor and the optical-electric encoder are adopted for monitoring the vibration, pressure, temperature, noise and rotating speed of the water pump in real time. The optical-electric encoder is adopted as the core of a rotating speed detection device, and the rotating speed of the water pump can be monitored in real time rapidly and accurately. The display screen and the processor are connected, and therefore the service performance of the water pump can be monitored in real time. The alarm device and the processor are connected, and an alarm can be given when water pump data are abnormal.

The invention provides an electronic speed regulation structure in a single-cylinder air-cooled diesel generator, and belongs to the technical field of fuel generators. The technical problem that the oil admission amount of an engine in an existing fuel generator cannot be accurately controlled is solved. The single-cylinder air-cooled diesel generator comprises a magneto and the engine, wherein the engine comprises a box body and an oil supply assembly arranged on the box body; an output shaft of the engine is connected with a rotor of the magneto, the electronic speed regulation structure comprises a driving motor and a shifting fork, and the shifting fork is connected with an accelerator in the oil supply assembly and can control the opening and closing angle of the accelerator; and an output shaft of the driving motor is connected with the shifting fork and can drive the shifting fork to swing back and forth. The electronic speed regulation structure further comprises a central processing unit and a rotating speed acquisition unit used for measuring and calculating the rotating speed of the magnetor. The electronic speed regulation structure can accurately and reliably control the fuel admission quantity and the rotating speed of the fuel engine.