487 results about "Fan-in" patented technology

The present invention discloses a method and apparatus for cooling the electronics associated with Computed Tomography (CT) detector arrays. More particularly, the present invention discloses use of thermoelectric coolers in cooling CT detector electronics. The present invention also provides for using blowers or fans to recirculated air within a plenum for the cooling of CT detector electronics. The present invention also discloses the use of wick type heat pipes being placed either horizontally or with the evaporator end radially farther out than the condenser end such that rotational forces assist with heat flow through the heat pipe for cooling CT detector electronics. The present invention also discloses use of axial groove heat pipes to cool the CT detector electronics because they have enhanced performance under revolving conditions. Lastly, the present invention discloses use of heat sinks and circulation fans in combination with either type of heat pipe.

A fan assembly for a computer system includes a fan and a frame connected to the fan. A number of louvers are rotatably connected to the frame and are capable of rotating between an open position in response to air pressure established by the fan in which air is permitted to flow through the fan, and a closed position under a force of gravity when the fan is inoperable in which the louvers block the air to flow through the fan. Each louver defines at least one groove along a width direction, and each of the at least one groove allows two portions at opposite sides to be broken off from each other.

The invention provides a circuit safety design method which utilizes triple modular redundancy to guarantee that an original circuit can work stably even if a hardware Trojan horse is maliciously embedded in the original circuit. The circuit safety design method comprises the following steps: firstly, after finishing the design and verification of the original circuit, selecting logical nodes which can not be covered by all conventional testing methods, and taking the logical nodes as output nodes; secondly, backtracking the output nodes as terminal points in a fan-in direction, and determining input nodes according to certain rules; and finally, performing the triple modular redundancy design of paths between the input nodes and the output nodes respectively according to the difference between combinatorial logic and sequential logic. Through the circuit safety design method, final output cannot be affected even after the logic value of a circuit node, which cannot be tested or has high risk, is changed under the influence of a hardware Trojan horse, and the original function of the circuit is kept.

The invention provides a server fan rotating speed regulation and control method and system, a terminal and a storage medium. The method comprises the steps of acquiring temperature information collected by multiple temperature sensors in a case; establishing a server space coordinate system, and generating a server temperature distribution diagram according to the positions of the plurality of temperature sensors and the temperature information acquired by each temperature sensor; dividing the case into a plurality of heat dissipation areas according to the distribution of fans in the case, and obtaining the temperature of each heat dissipation area according to the temperature distribution diagram; and regulating and controlling the rotating speed of the fan corresponding to each heat dissipation area according to the temperature of each heat dissipation area. According to the method, the workload of the BMC processor can be reduced to the maximum extent. And the infrared operation unit can obtain the temperature layout of the whole server system more reasonably, and each fan control unit of the mainboard is controlled reasonably, so that the purpose that the server works efficiently is achieved.

The invention discloses a fan control method comprising the steps of sending an initial control signal to a fan in response to the condition of receiving a start-up instruction; cyclically obtaining the temperature of each memory, and comparing the temperature of all memories to obtain the highest temperature; predicting a change trend of the current of the memory corresponding to the maximum temperature in response to the condition that the maximum temperature is greater than a preset value; and sending a control signal corresponding to the rising speed of the current to the fan in response to the condition that the current is predicted to be in a rising trend. The invention also discloses computer equipment and a readable storage medium. By means of the method, the current trend is predicted, and therefore the rotating speed of the fan can be increased in advance. In the way, the fan performs preventive heat dissipation, the overall ambient temperature is not significantly increased,the working efficiency of related components of a system is better improved, and power consumption caused by temperature rise is saved.

The invention discloses a method for controlling current instructions during a fault ride-through period of a doubly-fed fan in a weak grid environment. According to the method, the influence of gridconnection guideline requirements, the fan converter capacity and the system small interference stability is comprehensively considered, and active current and reactive current instructions are set. According to the invention, a small signal model of a doubly-fed wind generator grid-connected system is established, and the influence of active current and reactive current instructions on the systemstability is analyzed through the Lyapunov stability criterion, so that current instruction constraint conditions capable of enabling the system to stably operate in the grid drop fault period can beobtained. The small signal model is detailed and accurate, and the stability analysis method is simple and visual, so that a reliable reference can be provided for current instruction setting in thelow-voltage ride-through period of the doubly-fed wind power generation system in the weak grid environment.

The invention discloses fan air supplying control equipment, fan air supplying control method and device, wherein the equipment comprises an infrared sensor which is used for acquiring a moving routeof a person moving in a region in which a fan is located, a processor which is used for determining an air supplying track of the fan according to the moving route, acquired by the infrared sensor, ofthe person and a controller which is used for controlling the fan to supply air according to the air supplying track determined by the processor. The fan air supplying control equipment, the fan airsupplying control method and device solve the technical problem of lower intelligent degree of the fan in the prior art.

The invention relates to an induced draft fan stall intelligent early warning method based on an actual critical stall curve of a fan. The method comprises the steps of 1, calculating specific pressure energy of an induced draft fan; step 2, cleaning historical operation condition sample data and removing faults, and determining a working condition point set of normal operation of the induced draft fan; and 3, fitting the boundary points above the working condition points of the induced draft fan in normal operation obtained in the step 2 through a polynomial fitting method. The method has theadvantages that compared with a single-parameter alarm method of a conventional DCS system, due to the fact that the distance between the actual operation working condition point and the critical stall curve serves as a judgment method, early warning can be conducted in advance according to distance changes; meanwhile, when the operation working condition point reaches or exceeds a critical stallcurve, an alarm can be given in time; the actual critical stall curve of the fan is obtained through fitting of long-term historical operation data and is closer to the actual operation condition than a stall curve given by a fan manufacturer, and accurate early warning of fan stall can be achieved.

The invention discloses a dynamic rotating speed protection method and system for virtual inertia frequency modulation of a doubly-fed fan. The method comprises the steps that an MPPT curve power reference value is obtained according to the rotating speed of the fan; performing virtual inertia control on the deviation between the actual frequency and the rated frequency to obtain an additional active reference signal added on the basis of the MPPT curve power reference value; performing dynamic rotation speed protection on the fan electromagnetic power actually output at the previous moment, the rotation speed of the fan and the product of delta f and the virtual inertia control differential coefficient to obtain output power; According to the power reference value, the extra active powerreference signal and the output power, obtaining the electromagnetic power output by the fan at the current moment. The output power of the fan can slowly drop to the maximum power tracking curve according to the change of the rotating speed of the rotor in the frequency modulation process, excessive reduction of the rotating speed of the fan is avoided, the fan can automatically recover to the original maximum power point after frequency modulation is finished, and therefore the stability and economical efficiency of the fan in the frequency modulation process are guaranteed.

The invention relates to an optimization type selection method, a sample database and a system of fans in sewage treatment plant design. The method includes step1 calculating air supply quantity and required pressure in the largest flow time section, the average flow time section and the smaller flow time section of an activated sludge system, step2 selecting type selection accuracy of the fans and maximum number of working platforms; step3 preferably selecting fan types meeting design requirements of the three flow time sections and the number and the running state of the working platforms in each time section; step4 returning to execute the step2 and reducing the type selection accuracy of the fans or determining the maximum number of the working platforms again if fans meeting the type accuracy requirement cannot be selected; and step5 queuing the fans according to energy consumption if the types of the selected fans are larger than 1 and providing the most energy-saving fan and a running combination of the fan for a user to achieve the aims of saving energy and improving working efficiency.

The invention provides an intelligent control system for a back-up source of a fan variable-pitch system. The intelligent control system comprises a fan real demand calculating module, a super-capacitor actual capacity calculating module and a super-capacitor intelligent control module; the fan real demand calculating module is connected with a variable-pitch motor and used for collecting wind speed data of pitch varying of a fan in a wind field, acquiring energy consumed in the feathering process of the variable-pitch motor, and calculating a real demand value of fan feathering for super-capacitor stored energy under the maximum design wind speed; the super-capacitor actual capacity calculating module is electrically connected with a super-capacitor to collect charge and discharge information of the super-capacitor and calculate the current actual capacitance of the super-capacitor; and the super-capacitor intelligent control module is in signal connection with the fan real demand calculating module and the super-capacitor actual capacity calculating module and is electrically connected with the super-capacitor to control the charge voltage of the super-capacitor according to thereal demand value and the current actual capacitance of the super-capacitor, predict the remaining usage time of the super-capacitor and judge whether the super-capacitor needs to be replaced or not.The invention further provides an intelligent control method for the back-up source of the fan variable-pitch system.

A leakage power optimization system optimizes leakage power of a circuit design which includes a set of logic gates. The system selects a leakage-power-reducing transformation for a logic gate, and determines a zone around the logic gate. This zone includes logic gates within a first predetermined number of levels in the logic gate's fan-out, the logic gate's fan-in, and a second predetermined number of levels in the logic gate's fan-in's fan-out. The system propagates arrival times within the zone to obtain updated slack values at endpoints of the zone. Then, in response to determining that the updated slack values at the endpoints of the zone do not degrade one or more circuit timing metrics, the system applies the leakage-power-reducing transformation to the logic gate.

The invention discloses a double-fed fan voltage regulation method based on double-layer model predictive control. The method comprises the following steps of firstly, establishing a double-layer model predictive control framework, and establishing a system frequency voltage response and fan rotor inner ring prediction model based on a system frequency, a fan grid-connected point voltage and the dynamic state of a double-fed fan rotor inner ring; for an upper-layer wind field model prediction controller, designing and solving the corresponding optimization problems the under normal and emergency working conditions to obtain the reference values of the active power and reactive power of a wind field; and designing and solving a corresponding optimization problem for a lower-layer doubly-fedfan rotor side model prediction controller so as to effectively track an upper-layer power reference instruction. According to the method, the wind field participates in grid-connected point voltageregulation through a double-layer model prediction control strategy, the grid-connected point voltage changes are responded in time under the normal and emergency working conditions, and then the windfield voltage controllability and the system voltage stability are improved, and the technical support can be provided for the participation of the double-fed fan in the voltage regulation and the design of a voltage ride-through controller of the double-fed fan.

An illumination fan connectable with at least one illumination fan for a computer includes a body, provided with a fan in center of the body, an illumination area on at least two sides of the fan at top of the body, a power socket and a first connector on one side of the body, and a second connector on another side of the body. The power socket is electrically connected with the first connector, the second connector, the fan and the illumination area. When the power socket is supplied with power, the fan and the illumination area of the body is respectively driven into rotation and illumination, and when the first connector of the body is connected with a second connector of a body of another illumination fan, a fan and an illumination area of the body of another illumination fan is respectively driven into rotation and illumination.

The invention relates to a power plant induced draft fan fault early warning method based on MSET and deviation degree, and the method comprises the following steps: S1, obtaining multivariable data of an induced draft fan in a normal operation state, and building an MSET model; S2, obtaining an estimated vector Xest of the running state of the induced draft fan according to the MSET model; S3, calculating the deviation degree between the observation vector Xobs and the estimation vector Xest of the running state of the induced draft fan by utilizing a deviation degree function; and S4, comparing the deviation degree with a deviation degree threshold value to obtain a residual error, and determining whether to trigger an alarm according to the residual error. An MSET model is established through multivariable data of the induced draft fan in a normal operation state, and an optimal estimation value of model operation is obtained. The deviation degree function is used for judging the deviation degree between the actual value and the optimal estimated value, and the fault development process is reflected visually. The deviation degree is compared with a set threshold value to obtaina residual error, and an alarm is raised if the residual error is too large. Compared with the prior art, the method has the advantages of improving the early warning accuracy and timeliness and the like.

The invention relates to a grinding system energy consumption optimization method based on an optimization model. The method comprises the following steps: firstly, dividing a grinding system into a plurality of different subunits, establishing a corresponding model on each subunit, and obtaining an optimization model of the grinding system; on the basis, establishing the optimization problem between the energy consumption and the running state of the grinding system, and finally, optimizing the energy consumption of the grinding system by optimizing the state set value of the grinding system.The method can effectively reduce the comprehensive energy consumption level of the main motor and the fan in the grinding system.

The invention discloses a hardware architecture of a photon tensor kernel integrated circuit for matrix calculation and a neural network training method thereof. Based on the photoelectric hybrid coherent detection and electron accumulation principle, an integrated photon dot product calculation unit (hereinafter referred to as DPU) is realized, and the DPU is arranged in an array manner to form large-scale parallelized matrix multiplication calculation hardware, namely a tensor kernel. Through the design of a double-layer fan-in waveguide bus, the interconnection of two-dimensional large-scale DPU arrays is realized. The invention further specifically provides a method for applying the photon tensor kernel integrated circuit to neural network training. According to the invention, high-speed data loading and high-speed matrix calculation are realized, a wooden barrel short board effect caused by mismatching of photoelectric clock rates is avoided, due to the double-layer waveguide busdesign, waveguide crossing loss and crosstalk are avoided; and the hardware architecture can be applied to all algorithms including matrix calculation, including neural network reasoning and training.