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333results about How to "Simple control" patented technology

Power-interrupting-free shifting speed changing box of electric vehicle and shifting control method of power-interrupting-free shifting speed changing box

The invention discloses a power-interrupting-free shifting speed changing box of an electric vehicle and a shifting control method of the power-interrupting-free shifting speed changing box. The speed changing box comprises a first gear pair mechanism, a second gear pair mechanism, a disc clutch and a shifting control mechanism, in the shifting control mechanism, a first gear overrunning clutch and a control overrunning clutch are mounted in corresponding gears, a control friction plate is fixed on a roller retainer and a roller shifting fork of the first gear overrunning clutch, a wave spring is mounted in an annular groove in an end surface of a second control gear, and a control pressure plate is axially pre-tightened through the wave spring, is clamped in the annular groove in the end surface of the second control gear and rotates along with the second control gear. By the shifting control method of the speed changing box, first gear engaging, second gear engaging and gear reversing actions can be realized and do not intervene. By the power-interrupting-free shifting speed changing box of the electric vehicle, the problem of interrupting of shifting power of the traditional AMT is solved, and a smooth speed ratio switching process can be realized. In addition, by the structure, a shifting fork and a shifting fork shaft are further omitted, the system structure is greatly simplified, and the total weight of a transmission is reduced.
Owner:青岛莱吉传动系统科技有限公司

Manual and automatic control system for realizing single-action control through pneumatic double-action executing mechanism with gas storage tank

The invention discloses a manual and automatic control system for realizing single-action control through a pneumatic double-action executing mechanism with a gas storage tank, comprising a pneumatic double-action control valve, a manual and automatic control system and an accident gas storage tank, wherein the pneumatic double-action control valve is formed by a valve and a pneumatic double-action executing mechanism through connection; the manual and automatic control system comprises a first pneumatic control valve, a second pneumatic control valve, a solenoid valve, a pressure switch, a field manual control panel, an air filtration pressure-reduction component, a one-way valve, a third pneumatic control valve, a fourth pneumatic control valve and a fifth pneumatic control valve. According to the control system, the control valve can realize remote control and the field manual control, and effectively prevents the valve fault caused by various faults of a field hand wheel device; and besides, the accident gas storage tank is additionally arranged in the control system, so that the interlocking action of the valve can be realized when the valve gas source fault is controlled, and the phenomenon that the valve cannot be switched on or switched off tightly due to long-time use of the pneumatic single-action executing mechanism.
Owner:ZHEJIANG ZHONGDE AUTOMATIC CONTROL VALVE

The control method of preventing over-temperature in the middle part of the condenser when DC frequency conversion multi-connected external units are refrigerated

ActiveCN102261720AReliable and stable continuous operationSimple controlSpace heating and ventilation safety systemsLighting and heating apparatusConstant frequencyEngineering
The invention discloses a control method for preventing overtemperature in the center of a condenser of a direct current (DC) multi-frequency conversion outdoor machine during refrigeration. The control method comprises the following steps of: detecting the central temperature Tc of an outdoor condenser coil pipe; when the Tc is less than 59 DEG C and more than or equal to 57 DEG C, prohibiting afrequency-conversion pressing machine from frequency raising, and prohibiting a constant-frequency pressing machine from being started; when the Tc is less than 57 DEG C, making the frequency-conversion pressing machine quit from the protection; when the Tc is less than 62 DEG C and more than or equal to 59 DEG C, making the frequency-conversion pressing machine reduce the frequency at the rate of 0.8 to 1.2HZ/10s; when the Tc is less than 65 DEG C and more than or equal to 62 DEG C, making the frequency-conversion pressing machine reduce the frequency at the rate of 0.8 to 1.2HZ/s; when the frequency of the frequency-conversion pressing machine is reduced to the lowest frequency and the Tc which is less than 65 DEG C and more than or equal to 59 DEG C is maintained for more than 1min, stopping the constant-frequency pressing machine, and continuously operating the frequency-conversion pressing machine at the lowest frequency; when the Tc is more than or equal to 65 DEG C, immediatelyshutting down the frequency-conversion pressing machine and the constant-frequency pressing machine; and when the Tc is less than 57 DEG C and the downtime of the constant-frequency pressing machine is maintained for more than 3min, starting the constant-frequency pressing machine. The control method has the advantages of no hysteresis quality and stable systems, and makes compressors difficultlyburned out.
Owner:NINGBO AUX ELECTRIC

Air conditioner, air conditioner control method and air conditioner control system

The invention provides an air conditioner control method. The air conditioner control method includes the following steps that a first temperature profile collected at first time in a room is acquired, and a background temperature region and a first temperature difference region in the first temperature profile are acquired, wherein the temperature of the first temperature difference region is different from the temperature of the background temperature region; a second temperature profile collected at second time in the room is acquired; whether a second temperature difference region besides the first temperature difference region exists in the second temperature profile or not is judged; if it is judged that the second temperature difference region exists, an air conditioner is controlled and/or a prompt is given to a user. By the adoption of the air conditioner control method, if an abnormal condition occurs when children sleep, the prompt can be given to patients in time, the patients do not need to pay attention of sleeping children in real time, the influence of children on the patients during sleeping can be reduced to the greatest extent, and sleeping of children and sleeping of the patients are guaranteed at the same time. The invention further provides the air conditioner and an air conditioner control system.
Owner:MIDEA GRP CO LTD

Bionic caudal fin underwater propeller based on hydraulic artificial muscles

ActiveCN103625625AImprove efficiencySimple controlPropulsive elements of non-rotary typePropellerHydraulic control unit
The invention discloses a bionic caudal fin underwater propeller based on hydraulic artificial muscles. The bionic caudal fin underwater propeller comprises more than two swinging devices, a caudal fin and a hydraulic control unit, wherein each swinging device comprises a T-shaped bracket and two artificial muscles which are symmetrically arranged on the T-shaped bracket; each artificial muscle comprises a telescopic assembly; each telescopic assembly is provided with an elastic hydraulic cavity and a connector which is connected with the elastic hydraulic cavity and the hydraulic control unit, and can linearly stretch and shrink through the liquid filling and drainage of the elastic hydraulic cavity; the T-shaped brackets of all the swinging devices are hinged end to end in sequence; one end of each telescopic assembly is hinged to the corresponding T-shaped bracket, and the other end of each telescopic assembly is hinged to the T-shaped bracket of the next swinging device; when one of the artificial muscles of each swinging device is in a stretching state in the same movement period, the other artificial muscle is in a shrinkage state, and the caudal fin is connected with the last swinging device. The bionic caudal fin underwater propeller has the advantages of simple structure, low cost, high efficiency, easiness in modeling and control, and the like.
Owner:NAT UNIV OF DEFENSE TECH

Avoidance needless type stereoscopic garage

The invention discloses an avoidance needless type stereoscopic garage. The avoidance needless type stereoscopic garage comprises an upright post, a vehicle carrying board, a track, a lifting device, a rotating device, a moving device and an anti-falling device, wherein the vehicle carrying board is mounted on the upright post and can be controlled by the lifting device to move up and down along the upright post; the upright post is mounted on the rotating device which can drive the upright post to rotate, and the rotating device is mounted on the moving device, a driving wheel and a guide wheel of the moving device are mounted on the track and drive the rotating device to move along the track horizontally; the anti-falling device is further arranged on the upright post; the lifting device adopts chain transmission for transmission, so that the transmission is stable; the rotating device adopts an incomplete gear mechanism for transmission, so that the installation space of the avoidance needless type stereoscopic garage is saved; and the anti-falling device adopts an anti-falling baffle which is arranged in a transverse sliding chute of the upright post, and the anti-falling safety performance is good. The avoidance needless type stereoscopic garage adopts three motors for independent control, the control mode is simple, further, the structure is simple, and maintenance and repairing are facilitated.
Owner:GUANGXI UNIV

Detachable tailstock type vertical take-off and landing unmanned aerial vehicle

ActiveCN106184738ASimple structureSimple controlAircraft controlWingsFuselageSingular problems
The invention provides a detachable tailstock type vertical take-off and landing unmanned aerial vehicle. Wings and a fuselage can be detachably assembled. The wings and the fuselage can form two overall arrangement forms. According to the X-shaped overall arrangement form, two pairs of wings are mounted on the fuselage and are bilaterally symmetrical, and each pair of wings is of a longitudinal symmetry structure; and the included angle between the wings in each pair is 120 degrees, and the four wings form an X shape. According to the Y-shaped overall arrangement form, three wings are mounted on the fuselage, the included angel between every two adjacent wings is 120 degrees, and the three wings form a Y shape. The unmanned aerial vehicle of the X-shaped overall arrangement form is suitable for long-distance flight under a wind-free condition. The vertical take-off and landing unmanned aerial vehicle of the Y-shaped overall arrangement form is suitable for short-distance flight under a lateral wind condition. According to the detachable tailstock type vertical take-off and landing unmanned aerial vehicle, the structure is simple, and control is easy; and since the wings and the fuselage are connected detachably, the unmanned aerial vehicle is suitable for different occasions, singular problems in a transition mode are avoided, and long endurance and long-distance flight can be achieved.
Owner:BEIHANG UNIV

D-class signal amplification circuit

InactiveUS20050052229A1Correction coefficientSimple controlNegative-feedback-circuit arrangementsDc amplifiers with modulator-demodulatorSignal onSignal amplification
A D-class signal amplification circuit of the invention intends to repress the influence by a fluctuations of the power supply voltage with a simplified circuit construction and inexpensive components. The D-class signal amplification circuit includes: a multiplier that multiplies an input signal by a correction coefficient, a first modulator that executes a delta-sigma modulation to an output signal from the multiplier, a D-class amplifier supplied with a power supply voltage VDD, which amplifies an output signal from the first modulator, a voltage conversion circuit that generates a power supply voltage VDD/2 from the power supply voltage VDD, a first low pass filter that inputs a signal converted into a level of VDD/2 on the basis of the output signal outputted from the D-class amplifier, a reference signal generation circuit supplied with VDD/2, which generates a reference signal on the basis of the input signal, a second low pass filter that inputs the reference signal, a first comparator that compares levels of the signals outputted from the first with the second low pass filters, and a coefficient control circuit that increases or decreases the correction coefficient by a predetermined modifying breadth, on the basis of the comparison result.
Owner:LAPIS SEMICON CO LTD

Automatic detection and screening device for hardness of bolt fastening piece

The invention discloses an automatic detection and screening device for the hardness of a bolt fastening piece. The automatic detection and screening device comprises a charging part, a rotary table, a workpiece pressing part, a discharging part, a hardness meter and a table, wherein the charging part is fixedly arranged on a swinging platform mounting base; the swinging platform mounting base and the rotary table are mounted on a base of the hardness meter. The continuous and reciprocating motion of the charging part, the workpiece pressing part, the rotary table, the discharging part and the hardness meter realizes continuous multi-point hardness detection and screening of a bolt. According to the automatic detection and screening device, a movable part is driven by an air cylinder and an electromagnet; the control manner is simple and the work is reliable and easy to realize; an adjusting bolt on a driving piece, a gasket on a spring material stopping part, a workpiece positioning sleeve and a rotary baffle are adjusted simply so as to realize hardness detection of the bolts with different specifications and the flexibility is good; meanwhile, the multi-point hardness detection can be carried out on the bolt by controlling the rotary angle of the rotary table so as to meet the requirements of the use of the hardness meter and the hardness detection; the charging part and the discharging part are mounted on a hardness meter worktable and the structure space of the whole machine is compact.
Owner:SHANGHAI JIAO TONG UNIV
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