495 results about "Fan-in" patented technology

Systems, apparatus, and methods of controlling a variable-speed fan of an environmental maintenance module that controls temperatures of a plurality of zones of a building are provided. A first critical zone of the building is identified by analyzing the first zone temperature errors, which are used to determine a final speed setting of the variable-speed fan. Systems, apparatus, and methods of calibrating an environmental maintenance module that controls a temperature of a zone of a building are also provided. A location parameter is calculated for a plurality of zone temperatures, and a scale parameter is computed that quantifies a variation of the zone temperatures relative to a location parameter. A first temperature setpoint for the zone is determined and used in controlling the temperature of the zone.

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 ventilation system comprising a fan to bring air into a building or exhaust air out of the building, a rechargeable battery to power the fan in the absence of an alternative energy source, and an alternative energy harnessing device to power the fan and to recharge the rechargeable battery in the presence of an alternative energy source. A sensor may be operatively connected to a controller or logic circuit to measure environmental factors, wherein the controller utilizes the measured environmental condition to select the power source with which to activate the fan. The ventilation system is configured to be a modular device with versatile fasteners for easy installment in windows or attics without the need for modification of the building, such as cutting holes.

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.

This invention provides means and methods for improving the routing and multiplexing logic of microprocessor busses and other similar high fan logic functions in FPGA and ASIC circuits. Routing of high fan-in signals is simplified by distributing the multiplexing function. The multiplexing function is separated into an AND function in the logic block and a programmable OR function in the routing block. Programming bits control which signals are ORed together in the routing elements. The AND output of a peripheral is controlled by either a distributed control circuit or by control signal(s) from a centralized control circuit.

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 an acoustic detection based status detection method of a server fan. The detection method comprises the following steps of: 1) placing a microphone in a machine box of a server, and collecting an audio signal near the fan in the machine box of the server to be detected when the fan is operating; 2) carrying out sampling on a fan sound signal input by the microphone and carrying out spectrum analysis, namely, expanding signals sent from a signal source according to a frequency sequence, editing the signals to a frequency function, and analyzing signal amplitudes on major frequency points; 3) deducing whether the fan is in the abnormal working state when the signal amplitudes of some major frequency points are not matched with the signal amplitudes in the normal state; 4) placing the microphone in the machine box of the server, wherein the fixed position of the microphone needs to be close to the fan as much as possible; and if multiple fans are arranged in the server, multiple microphones are correspondingly needed to coordinate the detection and sampling.

A circuit simulator simulates a circuit described by a circuit logic model as having a set of clocked registers interconnected by un-clocked logic to produce waveform data indicating states of each circuit input signal and of each register output signal as functions of clock signal edge timing. The waveform data and the logic model are then processed to produce a temporal schema model characterizing the circuit's logic and behavior. A display based on the temporal schema model depicts circuit behavior using separate symbols to represent successive circuit input signal states and register output signal states at various times during the simulation. The same display also graphically depicts fan-in or fan-out logical relationships by which circuit input signal states and register output signal states influence register input signal states.

A cooling fan, system and method for controlling cooling fans in a personal computer. A unique series of sensing points is placed on a rotating hub of a cooling fan in order to uniquely identify the particular type of cooling fan. A tachometer sensor mounted in the cooling fan detects the unique series of sensing points as the cooling fan rotates and generates a sequence of pulses corresponding to the detected sending points. This generated pulse signal may be transmitted by the sensor to the fan control code. The fan control code may determine a particular type of cooling fan that the cooling fan is based on the generated pulse signal. Once the fan control code determines the particular type of cooling fan that the cooling fan is, the fan control code uses particular control parameters set for that particular type of cooling fan to control the cooling fan so that it operates optimally.

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 provides a wind power structure working mode parameter identification method considering strong harmonic interference. The method is characterized by assuming that harmonic excitation of a fan in a specific time period has a constant time invariant property in a frequency domain; making clear harmonic components included in the vibration information; adding one or more constant harmonic information matrixes corresponding to interference harmonics to a fixed position in an original structure system characteristic matrix in SSI; and reconstructing and promoting to establish an HM-SSI for modal identification, thereby ensuring that a characteristic value matrix diagonal after system decomposition comprises known harmonic information, indirectly enabling a structure inherent modal composition to be distinguished from the interference harmonic component on the matrix diagonal information and realizing precise identification of wind power structure working mode parameters. The method not only solves the problem of wind power structure working mode parameter identification under strong harmonic interference, but also provides necessary method support and technical support for real-time online monitoring and operational safety assessment of the fan and has good engineering applicability and application value.

According to one embodiment, an information processing apparatus includes: a case; a device that is housed in the case; a cooling fan that cools the device; a temperature detecting device that detects a temperature of the device; and a controller that is operable in a first mode and second mode, the first mode controlling the cooling fan in a range from a stopped state to a given rotation speed in accordance with the temperature detected by the temperature detecting device, and a second mode controlling the cooling fan to rotate at a predetermined rotation speed that is lower than the given rotation speed.

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 a super capacitor module information acquisition control method and control system. The super capacitor module information acquisition control method comprises the specific steps of: monitoring a working state of each super capacitor module in an energy storage unit to obtain voltage and temperature signals and a switching state of a fan in the energy storage unit; determining state information of each super capacitor module according to the monitored voltage, temperature and fan switching state, judging the voltage and temperature fault states, and generating an alarmsignal according to the voltage and temperature fault states; identifying the fault state of each super capacitor module and the switching state of the fan, wherein identifier bits correspond to thesuper capacitor modules in a one-to-one correspondence; and summarizing the fault state of the identifier bits and the switching state of the fan, and outputting a control signal according to a control logic. The super capacitor module information acquisition control method and control system can realize the state monitoring of the super capacitor module and perform protection alarm control, whichimproves the safety of the super capacitor module and prolongs the service life of the super capacitor module.

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 a notebook computer radiator capable of matching air speed along with temperature variation, which comprises a frame body, a temperature sensor, an analog-to-digital conversion and a fan. The frame body is rectangular and corresponds to the heating position of a notebook computer. The fan, the temperature sensor and the analog-to-digital conversion are arranged in the frame body. The temperature sensor and the analog-to-digital conversion are electrically connected with the fan in series. The radiator can adjust rotating speed of the fan according to the temperature of the heating position of the notebook computer, saves electricity, is convenient to use and has practical applicability.

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 a fan speed regulation system and method. The system comprises a monitoring board, a signal backboard, at least one temperature sensor array, at least one fan assembly plate and at least one fan array, wherein the monitoring board, the temperature sensor arrays and the fan assembly plates are in communication connection with the signal backboard; each fan assembly plate is in communication connection with the corresponding fan array; the monitoring board or each fan assembly board is used for calculating the rotating speed of the corresponding fan array according to temperature information and a preset speed regulation mode and generating corresponding rotating speed control information; the signal backboard is used for transmitting the information; each temperature sensor array is used for collecting temperature information of a single board in network equipment; each fan assembly plate is further used for adjusting the rotating speed of each fan in the corresponding fan array according to the rotating speed control information; and the fan arrays are used for cooling the network equipment.

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 monitoring device for an equipment fan. The monitoring device comprises a fan rotating speed detection device, a signal detection circuit and an alarm module, wherein the fanrotating speed detection device is arranged on a fan module of equipment, a first receiving end of the signal detection circuit is connected with the fan rotating speed detection device, a second receiving end of the signal detection circuit is connected with a fan in-place signal end of the fan module, and an output end of the signal detection circuit is connected with the alarm module; when thesignal detection circuit detects that the rotating speed of the fan module is zero and determines that the fan module is not in place, the alarm module is controlled to give a fan fault alarm. Therefore, the situation of fan fault false alarm caused by abnormal change of the fan rotating speed threshold in the BMC chip is avoided, fan fault false alarm events are reduced, interference to operation and maintenance of a data center is reduced, and the situation that the failure rate of the whole server is higher than an actual value is reduced. The invention further discloses a monitoring method of the equipment fan, and the monitoring method has the above beneficial effects.

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.

A computer-implemented method includes a processor identifying, within the netlist, at least one strongly connected components (SCCs) that has a reconvergent fanin input with at least two input paths from the reconvergent fanin input having a different propagation delay to the SCC. The method then computes an additive diameter for the netlist comprising at least one SCC, where the additive diameter includes a fanin additive diameter determined based on a propagation delay difference of the at least two input paths to a SCC and a number of complex feed-forward components within at least one input path. In response to the reconvergent fanin input to the SCC providing a binate function, the method computes a multiplicative diameter for the SCC utilizing a least common multiple (LCM) derived from one or more propagation delay differences across each reconvergent fanin input leading to the SCC.

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.