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745 results about "Prevention control" patented technology
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Hazard Prevention and Control. Effective controls protect workers from workplace hazards; help avoid injuries, illnesses, and incidents; minimize or eliminate safety and health risks; and help employers provide workers with safe and healthful working conditions.
Vehicle antitheft device
InactiveUS6989737B2Good effectAnti-theft devicesCharacter and pattern recognitionDriver/operatorCommunication unit
Disclosed is a vehicle antitheft device not requiring a contract with a security company, etc., and increasing a vehicle antitheft effect. In the vehicle there are provided a camera or a microphone, and a control device for distinguishing a face or voice of a human by means of an image or sound captured by the camera or microphone, and based on distinction results, executing vehicle theft prevention control operations. The camera is provided at a position capable of capturing a normally seated driver and the outside through a window next to a driver's seat. Further, in the vehicle there is provided a radio communications unit. The control device records the captured image from the camera, judges whether the it is the face image of the person, and if it is, performs control so that the image is sent to a given reporting destination via the radio communications unit.
Owner:MITSUBISHI ELECTRIC CORP
Large electric network on-line preventing control method based on static state and transient safety steady mode
ActiveCN101299539AGuaranteed stability and securityOptimize safety and stability preventive control measuresSystems intergating technologiesSpecial data processing applicationsTransient statePower grid
A power pool online precaution control method based on the static state and the transient safe stable mode, includes: 1) obtaining the transient state process, 2) seeking the transient state and the static state safety margins, 3) performing the pattern classification to the failure, 4) trying to the obtain the adjusting project which satisfies all the failure modes, 5) computing the participation factor of the unsafe candidate control measurement of the transient state voltage and the frequency and sorting, 6) computing the sensitivity of the participation factor of each overload candidate control measurement after the failure and sorting, 7) obtaining the new mode data after adjustment and checking the safety of the static state and the transient state. The invention performs the coordination optimization among the transient power angle, the transient voltage / frequency and the static state device overload precaution control through integrating the control measurement participation factor of each mode, obtains the optimized safe and stable precaution control measure for satisfying the practical requirement of the engineering.
Owner:NARI TECH CO LTD +1
Lane departure prevention apparatus and method
InactiveUS20070255474A1Short timeUncomfortable feelingDigital data processing detailsSolid-state devicesEngineeringPrevention control
A lane departure prevention apparatus includes a control section configured to carry out a lane departure prevention control to prevent a vehicle from departing from a lane, and to finish the lane departure prevention control by using a predetermined finish parameter; a vehicle-state detecting section configured to detect a state of vehicle at least when or after the lane departure prevention control is started; and a control finish-parameter correcting section configured to correct the predetermined finish parameter on the basis of the vehicle state detected by the vehicle-state detecting section.
Owner:NISSAN MOTOR CO LTD
Automobile longitudinal collision mitigating system and control method
ActiveCN102463951AImprove the anti-collision effectPedestrian/occupant safety arrangementAutomatic initiationsSpeed control systemControl system
The invention discloses an automobile longitudinal collision mitigating system and a control method, which are used for avoiding automobile collision or lightening damages caused by the automobile collision to the utmost extent; the automobile longitudinal collision mitigating system comprises a front ranging radar and a rear ranging radar, a collision-prevention control unit, a speed control system and an alarming unit; the collision-prevention control unit is used for calculating relative speed of the automobile in relation with front and rear automobiles according to distance data provided by a radar ranging system, judging whether the collision occurs and the possible occurrence time of collision, sending corresponding instructions to actuating mechanisms according to preset programs, and controlling acceleration or deceleration braking of the automobile, so that the automobile collision is avoided or the damages resulting from the automobile collision are lightened to the utmost extent.
Owner:ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1
Brake control unit for railway vehicle
ActiveCN104071143AAdd equipmentImprove reliabilityBraking action transmissionBrake safety systemsAnomaly detectionNetwork communication
Owner:NANJING CRRC PUZHEN HAITAI BRAKE EQUIP CO LTD
Vehicle motion control device
Provided is a vehicle motion control device which enables a reduction in uncomfortable feeling and an improvement in safety. Specifically provided is a vehicle motion control device capable of independently controlling the driving forces and braking forces of four wheels, said vehicle motion control device comprising a first mode (G-Vectoring control) in which approximately the same driving force and braking force are generated in right and left wheels among the four wheels on the basis of a forward / backward acceleration / deceleration control command linked with the lateral motion of a vehicle, and a second mode (sideslip prevention control) in which different driving forces and braking forces are generated in the right and left wheels among the four wheels on the basis of a target yaw moment calculated from sideslip information relating to the vehicle, wherein the first mode is selected when the target yaw moment is a predetermined threshold value or less, and the second mode is selected when the target yaw moment is greater than the threshold value.
Owner:HITACHI ASTEMO LTD
Method and system for policy based monitoring and blocking of printing activities on local and network printers
ActiveUS20090086252A1Performance delayDigital data processing detailsVisual presentation using printersComputerized systemData loss
A method and system for data loss prevention controls and protects sensitive data from being printed in an unauthorized manner. A method for controlling printing activities implemented in a computer system comprises intercepting a print job comprising print data intended for a printer driver, delaying performance of the print job, analyzing content of the print data to determine whether to allow or cancel the print job based on a security policy, and resuming or canceling the print job based on the analysis of the content of the print data.
Owner:MCAFEE LLC
Three-dimensional coordinated electric network energy managing system and method for controlling and evaluating electric network
InactiveCN101232182ARealize online trackingRealize closed-loop controlData processing applicationsSpecial data processing applicationsPower qualityLoop control
The invention relates to a 3D-coordinated power grid energy management system and a power grid evaluation and control method, which belongs to the field of scheduling automation of power system. The system comprises a power grid model reconstruction sub-system, a power grid safety evaluation and alarm sub-system, an active frequency optimization control sub-system and a passive voltage optimization control sub-system, and a background calculation sub-system and a system foreground. The method comprises following steps: tracking isoline of an external power grid and automatically reconstructing a global power grid model; automatically executing online safety analysis integrated with static power grid, dynamic power grid, voltage stabilization, coordination of relay protection setting values, etc., and online recognizing the safety state of the power grid; alarming for normal unsafe condition, and carrying out prevention control; alarming for emergent conditions, and carrying out correction control calculation; and carrying out realtime active scheduling closed-loop control and passive voltage optimized closed-loop control under normal safety condition. The invention can achieve comprehensive and coordinated closed-loop control for the safety of the power grid, the economy and the electric energy quality.
Owner:TSINGHUA UNIV
Lane departure prevention apparatus
InactiveUS20050096827A1Easy to controlAnalogue computers for trafficPedestrian/occupant safety arrangementPrevention controlYaw control
A lane departure prevention apparatus is configured to conduct a course correction in a lane departure avoidance direction when the controller 8 determines that there is a potential for a vehicle to depart from a driving lane. The controller 8 combines yaw control and deceleration control to conduct departure prevention control to avoid lane departure. The yaw control is not actuated if the opposite direction from the steering direction coincides with the lane departure direction (steps S10 and S11). Preferably, the controller 8 sets the timing of yaw moment and the deceleration of the vehicle on the basis of the acceleration or deceleration of the vehicle, and performs braking control so that these settings are achieved (steps S7 to S9). Preferably, the controller 8 calculates the target yaw moment in the lane departure-avoidance direction on the basis of the running state of the vehicle, and calculates the deceleration amount by taking into account the driver braking operation amount.
Owner:NISSAN MOTOR CO LTD
Vehicle dynamics control apparatus
ActiveUS7392120B2Improve driving stabilityReduce and suppress degreeVehicle fittingsDigital data processing detailsVehicle dynamicsControl system
In a vehicle dynamics control apparatus capable of balancing a vehicle dynamics stability control system and a lane deviation prevention control system, a cooperative control section is provided to make a cooperative control between lane deviation prevention control (LDP) and vehicle dynamics stability control (VDC). When a direction of yawing motion created by LDP control is opposite to a direction of yawing motion created by VDC control, the cooperative control section puts a higher priority on VDC control rather than LDP control. Conversely when the direction of yawing motion created by LDP control is identical to the direction of yawing motion created by VDC control, a higher one of the LDP desired yaw moment and the VDC desired yaw moment is selected as a final desired yaw moment, to prevent over-control, while keeping the effects obtained by both of VDC control and LDP control.
Owner:NISSAN MOTOR CO LTD
Condensation prevention control method and device for air conditioner
ActiveCN104197475AImprove control accuracySpace heating and ventilation safety systemsCondensate preventionEngineeringPrevention control
The invention discloses a condensation prevention control method and device for an air conditioner. The condensation prevention control method includes: detecting the indoor relative humidity of the environment where the air conditioner is located; judging the humidity range where the indoor relative humidity is located; detecting the operation time of the air conditioner; determining the air sweeping time of the air conditioner according to the humidity range and the operation time; controlling the air conditioner to perform air sweeping according to the air sweeping time. By the method, the problems that air sweeping is mechanically controlled on the basis of air conditioner operation time in current air conditioner condensation prevention control and condensation prevention control is poor is accuracy are solved, and accuracy of condensation prevention control for the air conditioner is increased.
Owner:GREE ELECTRIC APPLIANCES INC
Method for assessing safety value of planning scheme for electrical power system containing large-scale wind power
InactiveCN102637289AOptimal prevention and control costsExcellent emergency cost controlData processing applicationsInformation technology support systemElectricityPower grid
The invention relates to the field of expansion planning and safety analysis on electrical power systems. In order to provide a systematized method and a relatively perfect assessment process for the safety assessment on a planning scheme, the technical scheme adopted by the invention is as follows: a method for assessing a safety value of a planning scheme for an electrical power system containing large-scale wind power comprises the following steps: 1, establishing a power supply-power grid unified planning model for taking account of static and dynamic safety values of the system; 2, beginning to carry out detailed operation simulation on candidate planning schemes; 3, after units are combined, carrying out safety assessment on the system time interval by time interval; 4, carrying out comprehensive safety control optimization on an contingency set by using a 'positive constraint and relaxation method' so as to obtain the optimal division of a preventive control contingency set and an emergency control contingency set; and 5, obtaining the total cost of the planning scheme, and taking the total cost as a basis for evaluating the planning scheme. The method disclosed by the invention is mainly applied to the expansion planning and safety analysis on the electrical power systems.
Owner:TIANJIN UNIV
Cold air prevention control method of air conditioner indoor unit
ActiveCN102901181AGuaranteed air temperatureGuaranteed comfortSpace heating and ventilation safety systemsLighting and heating apparatusCold airEngineering
The invention discloses a cold air prevention control method of an air conditioner indoor unit. The cold air prevention control method of the air conditioner indoor unit comprises the steps of: measuring indoor temperature T1, obtaining the temperature T2 of an indoor fan for preventing stop of the cold air and the temperature T2aim of a target coil according to the indoor temperature T1; measuring the temperature T2 of an indoor coil; judging the relation between the temperature T2 of the indoor coil and the temperature T2 of the indoor fan for preventing stop of the cold air and the temperature T2aim of the target coil, and selecting a fan start mode according to the judgment result. According to the cold air prevention control method of the air conditioner indoor unit, the air conditioner indoor unit gently adjusts the rotating speed of the fan in a self-adapting manner when the air conditioner indoor unit enters a cold air prevention mode to run, and the temperature T2 of the indoor coil is controlled within a demanded value to ensure the air outlet temperature, so that the rotating speed of the air conditioner indoor unit does not frequently fluctuate. The cold air prevention control method is accurate to control; the heating capacity is improved, and the use comfort is ensured.
Owner:GD MIDEA AIR-CONDITIONING EQUIP CO LTD
Air conditioner heat-production cold air prevention control method
InactiveCN101135488AImprove comfortImprove satisfactionSpace heating and ventilation safety systemsLighting and heating apparatusCold airEngineering
The invention discloses an air conditioner heating cool air -preventing controlling method. It includes the following steps: a. detecting indoor temperature; b. judging whether the said indoor temperature is in the set range, if it is, step c is performed; c. judging whether indoor coil pipe of the said air conditioner is in the certain range, if it is, then step d is executed; d. indoor fan motor of the said air conditioner starts.
Owner:HISENSE (SHANDONG) AIR CONDITIONING CO LTD
Vehicle driving support apparatus
ActiveUS20140136015A1Suppress uncomfortable feelingReduce detectionDigital data processing detailsAnti-collision systemsDriver/operatorEngineering
A braking / driving force control unit determines whether or not the driver has a intention of lane change on the basis of the detected road shape and the steering amount. The braking / driving force control unit detects an obstacle which is an obstacle present rearward and sideward of the vehicle. The braking / driving force control unit determines whether approach prevention control for preventing an the vehicle from approaching to the obstacle should start, when it is determined that the driver has the intention of lane change and the obstacle is detected, and performs the approach prevention control for supporting prevention of the vehicle from approaching to the obstacle when it is determined that the control should start. At this time, the braking / driving force control unit determines detection accuracy of the road shape ahead of the vehicle and suppresses the determination of the start of the control when the detection accuracy is low.
Owner:NISSAN MOTOR CO LTD
Smart central strategy control system for micro-grid
ActiveCN104283308AGuaranteed stabilityGuaranteed reliabilitySingle network parallel feeding arrangementsSystems intergating technologiesCollection systemPrevention control
The invention discloses a smart central strategy control system for a micro-grid. The smart central strategy control system for the micro-grid comprises a micro-grid electrical system. The micro-grid electrical system comprises a distributed electricity generation unit, an energy storage unit, an environment monitoring unit, a simulation load unit, an actual load unit, a communication network unit and a central strategy control unit. The smart central strategy control system for the micro-grid further comprises an information collection system unit and a central control processing unit. According to the smart central strategy control system for the micro-grid, overall control, coordination and optimization of electricity generation equipment, electricity consumption equipment and electricity consumption quality of the micro-grid can be achieved, the intermittent energy electricity generation plan, the load electricity consumption plan, load control, energy storage, the diesel engine electricity generation plan and the like are involved, and the functions of emergency electricity consumption control, automatic grid-connected / grid-disconnected switching control, adverse current prevention control, black-start control, peak load shifting, time shifting and the like of the system can be achieved. In communication, the smart communication detection technology and the channel hot standby redundancy technology are adopted additionally, and the stability and the reliability of communication are guaranteed.
Owner:江苏和网源电气有限公司
Sway-prevention control method for crane
ActiveCN102502403ASwing does not produceShort control adjustment timeLoad-engaging elementsOperating instructionPrevention control
The invention relates to a sway-prevention control method for a crane, which is characterized in that according to the operation demand of the crane, an operating instruction related to a trolley is sent to a controller by an operator; the controller works out the operating speed of the trolley according to a trolley acceleration and deceleration formula; and the operating speed of the trolley is controlled through a frequency converter and a trolley driving motor to realize the sway-prevention control on the crane. According to the sway-prevention control method for the crane, after the crane reaches a uniform motion performed at a specified speed from a stop state, a lifting hook and a load do not sway, and after the crane reaches the stop state from the uniform motion, the lifting hook and the load do not sway as well. Moreover, the control adjustment time of the dynamic process of the crane from a static state to the uniform motion and from the uniform motion to the stop state is the shortest.
Owner:HENAN WEIHUA HEAVY MACHINE
Freezing prevention control method of indoor unit of air conditioner
ActiveCN108317669AFreeze improvedImprove cooling effectMechanical apparatusSpace heating and ventilation safety systemsPrevention controlPower flow
The invention belongs to the technical field of air conditioners, in particular to a freezing prevention control method of an indoor unit of an air conditioner. The problem that a freezing condition of the indoor unit of an existing air conditioner is judged only through a temperature of an inner coiled tube so as to easily cause misjudgment is solved. The freezing prevention control method of theindoor unit of the air conditioner disclosed by the invention comprises the following steps: acquiring current of an air blower and a temperature of a coiled tube of the indoor unit when the air conditioner is at refrigerating operation; judging whether the air conditioner enters into a freezing prevention mode of the indoor unit according to the current of the air blower of the indoor unit and adifference value between the temperature of the coiled tube of the indoor unit and a standard temperature of the coiled tube when the temperature of the coiled tube of the indoor unit is smaller thanthe freezing temperature of the coiled tube of the indoor unit; judging the entrance time of the indoor unit into the freezing prevention mode according to the current of the air blower of the indoorunit and the difference value between the temperature of the coiled tube of the indoor unit and the standard temperature of the coiled tube, so that the judgement ability of the air conditioner can be greatly improved.
Owner:QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD +2
Control method and device for air conditioner
ActiveCN106765975ASolve the problem of relatively limited scope of applicationMechanical apparatusSpace heating and ventilation safety systemsEngineeringControl theory
The invention discloses a control method and device for an air conditioner, wherein the method comprises the following steps of: obtaining operation information of a compressor of the air conditioner and operation temperature information of the air conditioner; confirming whether the air conditioner has a humidity sensor for obtaining an operation humidity environment of the air conditioner or not; judging whether a condensation prevention control condition is met or not according to the operation information of the compressor of the air conditioner, the operation temperature information of the air conditioner as well as the confirmed result about whether the humidity sensor for obtaining the operation humidity environment of the air conditioner exists or not; and if the condensation prevention control condition is met, regulating operation frequency of the compressor of the air conditioner to perform condensation prevention control on the air conditioner. The control method solves the problems that a control strategy for the condensation problem of the air conditioner in the prior art is only suitable for the air conditioner with the humidity sensor and range of application is relatively limited, so that the scope of application is expanded.
Owner:GREE ELECTRIC APPLIANCES INC
Integrated coordinating control method for security stabilization early warning, preventing control and emergency control
ActiveCN101340080AImprove securityImprove economyData processing applicationsEmergency protective circuit arrangementsEngineeringPrevention control
The invention relates to an integration coordination control method of the early security and stability warning, prevention and control and emergency control of large power grids and includes the following steps: various steady data and dynamic data of large power grids are gathered; the present modes are matched with serious historical fault forms in real time as the online appending presupposition fault of stable analytic calculation; the curve data is mined with area methods such as expansion after the power grid is simulated to extract the stable quantitative characteristics of a system; when the power grid has positive secure stability margins, the stability margins and relevant sensitivity analysis technology are used for calculating the limit output and load of a generator and the limit power of a stability section; when the power grid has negative secure stability margins, the prevention and control and emergency control are calculated to confirm the amount of prevention and control measures and control cost thereof as well as the amount of emergency control measures and control cost thereof; the optimum combination of the prevention and control and emergency control are automatically searched. The integration framework of the optimization and coordination of the early security and stability warning, prevention and control and emergency control is built.
Owner:NARI TECH CO LTD +1
Method for estimating and optimizing dynamic safety risk of power transmission system based on practical dynamic safety field
InactiveCN101282041ASmall amount of calculationTaking into account the great economic benefitsSpecial data processing applicationsAc network circuit arrangementsOperating pointDecision taking
The invention discloses a transmission system dynamic security risk evaluating and optimizing method based on practical dynamic security field, wherein, the risk evaluating relates to influence of uncertainty for risk of node injecting power and system security control measures in computing dynamic unsafety risk by establishing the dynamic unsafety risk evaluating model based on practical dynamic security field; the optimizing method performs the risk control optimation to establish the optimum model of risk control aiming at dominant preconceiving accident collection by determining and dividing the preconceiving accident collection gamma=gamma1 and gamma2. The risk evaluating model can relate to the uncertainty of node injecting power in transmission system dynamic risk evaluating and greatly reduce computing quantity of the dynamic security risk evaluating. The dynamic risk optimizing model realizes the optimizing compution of integrated control measures aiming at the preconceiving accident in expectation operating point and security control preconceiving accident collection gamma1 before adopting control measures. The optimizing compution result can be used for guiding prevention control and emergency control decision.
Owner:TIANJIN UNIV
Power system voltage stable on-line monitoring and prevention control method based on probability
The method includes following steps: obtaining online data of power network from energy management system and power market; determining probability of equipment fault in the time period based on arrangement of equipment repair and weather condition in each area; creating sample space from Monte Carlo simulation, each sample includes two parts: X (increment direction of power), and Y (set of fault equipment); calculating steady tolerance of voltage corresponding to each sample and obtaining probability density distribution of voltage of voltage in power system from layered computation method; determining value of steady tolerance system needed to reach, limiting values of system parameters, and precaution control value; adjusting working parameters of system to ensure steady voltage in power system under specified confidence level. Advantages are: getting rid of a great lot calculation in traditional 'point-by-point method' and avoiding CPF calculation again.
Owner:TIANJIN UNIV
Condensation prevention control method of air conditioner
ActiveCN102022804AGuaranteed uptimeRun energy savingSpace heating and ventilation safety systemsLighting and heating apparatusEngineeringMultiple criteria
The invention relates to a condensation prevention control method of an air conditioner, which comprises the following steps: 1, judging the following conditions after starting up: a, whether the set air speed is at a top grade or not; b, whether a compressor is started for the set time T1 or not; c, whether the indoor temperature is more than or equal to the set temperature Ts1 and is less than or equal to the set temperature Ts2 or not; d, whether the temperature of an indoor machine evaporator is more than or equal to the set temperature Ts3 and is less than or equal to the set temperatureTs4 or not; if one or more conditions are met, executing the step 4, otherwise, executing the step 2; 2, judging whether the actual operational mode is a refrigeration or dehumidification mode, if not, executing the step 4, if yes, continuously judging whether the compressor is started or not, if yes, executing the step 3, otherwise, executing the step 4; or firstly judging whether the compressor is started or not, if not, executing the step 4, if yes, continuously judging whether the actual operational mode is a refrigeration or dehumidification mode, if yes, executing the step 3, otherwise, executing the step 4; 3, opening an electric heating tape by the air conditioner, and executing the step 1; and 4, closing the electric heating tape by the air conditioner, and executing the step1.
Owner:MIDEA GRP CO LTD
High-voltage safety precaution control method of hybrid electric vehicle
InactiveCN102897039AImprove securityAvoid dangerElectric devicesElectricityElectrical resistance and conductance
The invention relates to a high-voltage safety precaution control method for a hybrid electric vehicle. The high-voltage safety precaution control method comprises the following steps: carrying out detection and fault handling based on the states of vehicles, i.e., respectively carrying out direct current and alternating current insulation monitoring in a parking process, a power-on process, a running process and a power-off process so as to improve the safety performance of the vehicle. The method has the following beneficial effects: the insulating resistance value of a high-voltage bus is detected in real time so as to determine whether the insulating state of the high-voltage bus meets the technical requirement of vehicle running, once the insulating resistance value of a high-voltage bus exceeds a prescribed limit, a system can give out an alarm and adopt corresponding measures to restrict or prevent normal operation of the vehicle in time.
Owner:BEIJING ZHIXING HONGYUAN AUTOMOBILE CO LTD
Exhaust gas cleaning system for internal combustion engine
ActiveUS20040123586A1Accurate estimateSafe and efficient cleaningElectrical controlInternal combustion piston enginesEngineeringLag
A diesel particulate filter (DPF) having an oxidation catalyst is disposed between exhaust pipes of an internal combustion engine. An exhaust gas temperature sensor senses outlet gas temperature of the DPF. An engine control unit (ECU) calculates estimated central temperature of the DPF from an output of the exhaust gas temperature sensor with the use of an inverse transfer function of a change in the outlet gas temperature with respect to a change in temperature of the DPF. Based on the estimated temperature, the ECU performs excessive temperature increase prevention control or regeneration control of the DPF. The transfer function is simply expressed with first-order lag and dead time. A time constant of the first-order lag and the dead time are set in accordance with an exhaust gas flow rate.
Owner:DENSO CORP
Vehicle dynamics control apparatus
ActiveUS20080208409A1Reduce and suppress degreeImprove driving stabilityDigital data processing detailsSteering initiationsVehicle dynamicsControl system
Owner:NISSAN MOTOR CO LTD
Collision-prevention control method for vehicle
InactiveCN107738644AImprove traffic safetyReduce collisionExternal condition input parametersEnvironmental perceptionPrevention control
The invention discloses a collision-prevention control method for a vehicle. The speed of the vehicle itself, the accelerated speed of the vehicle itself, the speed of the front car, the accelerated speed of the front car and the information of the spacing between the vehicle itself and the front car are obtained through the environmental perception capacity of the vehicle, and a steering / brake collision-prevention action decision-making mechanism is constructed. If the current vehicle collision risk degree meets the expression shown in the description and the vertical spacing Dadj between thevehicle itself and the front car is not smaller than the minimum vertical spacing DM-Fd between the vehicle itself and the front car, steering collision prevention is conducted; if the current vehicle collision risk degree meets the expression shown in the description or the current road condition does not meet the steering collision prevention condition, vertical brake collision prevention control is conducted. Through the combination of the steering collision prevention and the brake collision prevention control, it is ensured that the brake collision prevention action or the steering collision prevention action which is highest in safety benefit is selected when the vehicle is in danger, the collision-prevention capacity of the intelligent vehicle is greatly improved, and the road traffic safety level is improved.
Owner:CHANGAN UNIV
Freezing prevention system for refrigeration device and air conditioner using the same
InactiveUS20040134207A1Ensure correct executionLow costAir-treating devicesCompression machines with non-reversible cycleEngineeringPrevention control
A freezing prevention system for a refrigeration device includes a freezing-prevention temperature sensor for detecting a refrigerant temperature in a refrigerant evaporator, and a control unit for controlling operation of a refrigerant compressor based on the detected refrigerant temperature. The control unit includes a calculating means for calculating an integral value of the detected refrigerant temperature integrating with respect to a passed time after the detected refrigerant temperature becomes equal to or lower than 0° C. When the integral value becomes equal to or larger than a predetermined value, the control unit stops the operation of the refrigerant compressor. Accordingly, the freezing prevention system can accurately perform a freezing prevention control while its production cost can be reduced.
Owner:DENSO CORP
Four-wheel steering vehicle rollover prevention system and control method thereof
The invention discloses a four-wheel steering vehicle rollover prevention system and a control method thereof. The four-wheel steering vehicle rollover prevention system comprises a sensor module, a drive-by-wire rear-wheel steering module, a front wheel differential brake module, a rollover evaluation unit, a route planning unit and a controller ECU; and the sensor module comprises a vehicle velocity sensor, a steering wheel angle sensor, a vehicle body rolling angle velocity sensor, a vehicle body rolling angle sensor, a yaw velocity sensor and an acceleration sensor. The rollover prevention control is carried out through the front wheel differential brake module, and the original driving intention of a driver is kept through the rear-wheel steering module, so that a secondary accident possibly resulting from the traditional rollover prevention control without considering the driving intention is avoided.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Cold air prevention control method and system of indoor unit of air conditioner
ActiveCN104896647AReduce startup delay timeHigh measurement accuracyMechanical apparatusSpace heating and ventilation safety systemsCold airElectricity
The invention discloses a cold air prevention control method and system of an indoor unit of an air conditioner. The method comprises the steps of: (1) turning on a refrigerant heater after an indoor controller receives a heating starting signal; (2) controlling and turning on a compressor and an outdoor fan by an outdoor controller; and (3) judging if the temperature T of an indoor heat exchanger is higher than a first set temperature T1, if so, controlling and turning off the refrigerant heater, and turning on an indoor fan, wherein the refrigerant heater is used for heating a refrigerant in an inlet pipe of the indoor heat exchanger. The cold air prevention control method of the indoor unit of the air conditioner improves the electricity-heat conversion efficiency through directly heating the refrigerant in the inlet pipe of the indoor heat exchanger.
Owner:HEFEI HAIER AIR CONDITIONER +2
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