116 results about "Change stage" patented technology

The invention discloses a multi-way access gateway device supporting a wireless network, which comprises a microprocessor module, a local storage module, a liquid crystal display module, a ZigBee communication module, an RFID (Radio Frequency Identification Device) reader module, a Bluetooth communication module, a Wi-Fi module and a 3G communication module. An access certification method comprises three stages: user registration, certification and password changing. In the user registration stage, a user registers through an access device to become a legal use. In the certification stage, data required by the user are returned by a terminal node after mutual certification of each two of the user, the access device, the gateway device and the terminal node. In the password changing stage, the registered user inputs a new password into the access device and the stored information is updated. The wireless access based on the Bluetooth, Wi-Fi and 3G is realized, large quantities of wiring in engineering applications is avoided, the speed of device deployment is increased, and the security of the access to the gateway device by the user can be improved when the access certification method is adopted.

The invention relates to a high-frequency tuning mass damper which comprises a connection plate, elastic elements, damping elements and a mass block. The mass block is arranged between the connection plate and a pre-tensioning connection piece, and the elastic elements are arranged between the mass block and the pre-tensioning connection piece and between the mass block and the connection plate respectively. The damping elements are arranged between the mass block and the pre-tensioning connection piece or/and between the mass block and the connection plate. A pre-tensioning structure is arranged between the connection plate and the pre-tensioning connection piece. The pre-tensioning structure exerts pre-tensioning force on the elastic elements to compress the elastic elements until the end portions of the elastic elements are fully contacted with the adjacent mass block, or the pre-tensioning piece or the connection plate. The elastic elements are made to be in a linear changing stage in which external force borne by the elastic elements and compression displacement of the elastic elements are in direct proportion. The high-frequency tuning mass damper is compact in space structure, suitable for control over vibration of a structure with 15Hz or higher frequency, superior in cost performance ratio, and wide in market application prospect.

The invention provides a double-factor authentication key agreement protocol suitable for a multi-gateway wireless sensor network. The protocol is divided into five stages: an initialization stage, aregistration stage, a login stage, an authentication stage and a key change stage. Fuzzy verification and honeywords methods are adopted in the user authentication part, so that the united password identity guessing attack based on the stolen intelligent card is effectively resisted. In the scheme, key negotiation is based on discrete elliptic curve encryption and can resist sensor capture attacks, so that the forward security of the protocol is ensured.

The invention relates to a capacity grading method for a power-type lithium ion battery. The method successively comprises the following steps of a first constant current changing stage, a charging-discharging circulating stage, a second constant current changing stage, and a constant current discharging stage, wherein a charging current of the first constant current changing stage is 0.1-0.7 C, acharging current of the second constant current changing stage is 0.5-0.8 C, a cut-off voltage is 3.6-5 V, a cut-off current is 0.02 C, and a discharging current of the constant current discharging stage is 0.5-0.8 C. The capacity grading method for the power-type lithium ion battery is short in consumed time, and simple in process, and is capable of stabilizing an SEI film formed in a formationperiod as possible within limited time. A battery through the capacity grading of the capacity grading method is not much different from a battery prepared by an original capacity grading technology in the aspects of discharge capacity and capacity retention ratio. So, the capacity grading method is used for effectively improving the production capacity under the precondition without losing the battery performance.

A gear shift device is used in a transmission of an engine, and includes: a shift drum that changes a speed change stage of the transmission according to a rotational position about an axis; an actuator having a driving shaft substantially orthogonal to this shift drum; a worm shaped barrel cam that is arranged parallel to the driving shaft of this actuator and that has a cam groove on an outer circumference; and a wheel gear that is coaxially fixed on the shift drum and that has a plurality of pins on an outer circumference. At least a pair of each pin of the wheel gear and the cam groove of the barrel cam is engaged with each other, and the shift drum is rotated by the actuator via the barrel cam and the wheel gear, to thereby change the speed change stage of the transmission.

At the time of a failure in the second group of engagement devices, the manner of input of oil pressures to a fail-safe valve group is changed via a priority degree switching valve on the basis of the state of engagement of engagement devices of the first group in such a manner that the predetermined degrees of priority for the supply of one of oil pressures PC4, PB1 output from linear solenoid valves SL4, SL5 to a corresponding one of a clutch C4 and a brake B1 via the fail-safe valve group are changed so as to avoid an event that the fail-safe gear stage established in order to prevent the occurrence of interlock of the automatic transmission involves a downshift of two or more stages from the speed change stage maintained immediately prior to the occurrence of the failure. Therefore, it is possible to prevent the occurrence of an uncomfortable behavior of the vehicle caused by the shift to the fail-safe gear stage.

A motor-driven actuator extends and retracts a piston rod. The actuator includes a housing, an electric motor having a motor shaft, a piston rod slidably extendable and retractable with respect to the housing, a speed-reduction stage coupled to the motor shaft and rotating a drive shaft parallel to the motor shaft, a speed and direction-change stage coupled to and driven by the drive shaft and rotating a wheel gear substantially perpendicular to the motor shaft, and a driving stage coupled to and driven by the wheel gear and extending and retracting the piston rod relative to the housing along a direction parallel to the motor shaft. The actuator also includes a position detector detecting when the piston rod is in the extended and retracted positions. Preferably, the position detector includes Hall effect sensors and a permanent magnet mounted on a piston driving the piston rod.

The invention discloses a calculation method for displacement and displacement time in a dynamic precipitation process of a pressure-bearing partially penetrating well or well group. According to the calculation method, a specific calculation method for the displacement and the displacement time in a process of changing an initial water level of an underground water level of the pressure-bearing partially penetrating well or well group to a target water level is established according to the basic theory and basic law of underground water seepage on the basis of the existing calculation formula for daily displacement when a stable water level is kept in the precipitation process of the pressure-bearing partially penetrating well or well group by carrying out integration on a precipitation area. According to the calculation method, the current situation that the calculation of the displacement at a water level changing stage is dependent on experiences for a long time when the pressure-bearing partially penetrating well or well group is designed nowadays is changed, and the calculation and dynamic control on the displacement in the whole precipitation process of the pressure-bearing partially penetrating well or well group in engineering construction are realized.

The invention discloses a drying process for preventing a dried iron core from rusting. The drying process comprises the four main steps as follows: a pre-dewatering stage, a preheating stage, a pressure changing stage and a final drying step, wherein the pre-dewatering stage comprises gradually heating air in a drying furnace until the temperature is 50 DEG C; the preheating stage comprises performing vacuum pumping until the pressure in the drying furnace as low as 40000 pa, then mixing air outside a tank until the pressure in the drying furnace returns to 80000 pa, preheating, repeating in this way: performing vacuum pumping, mixing air and preheating until the temperature of the iron core reaches 70 DEG C; the pressure changing stage comprises performing vacuum pumping for a period of time, then keeping the pressure for a period of time, repeating in the way until the pressure in the drying furnace is as low as 500 pa and the temperature of the iron core reaches 75 DEG C; and the final drying step comprises continuously performing vacuum pumping until the pressure in the tank is as low as 100 pa. The drying process has the beneficial effects that the drying process is divided into four stages, water vapor in the drying furnace during the drying process is guaranteed to be timely discharged and the oxygen content is reduced, so that the rusting of the iron core can be effectively prevented.

The invention discloses an intelligent vehicle collision safety prediction method, comprising the following steps: 1) adopting an obstacle detection algorithm based on a single image to determine whether there is an obstacle or a vehicle in front of a microminiature vehicle; 2) a processor calibrates the two cameras, determines the height and the distance of the obstacle by adopting the stereo vision method and transmits the information to the controller; 3) a distance measurement device detects the vehicle condition of the adjacent two lanes, provides a traveling area for overtaking and lane-changing, and transmits the information of the traveling area to the controller. The invention provides an intelligent vehicle collision safety prediction method. The collision safety model is established in the approaching stage, the overtaking lane and the overtaking lane changing stage, the safety monitoring is carried out in the whole stage in the overtaking process, and the safe operation isensured. At the same time, the prediction method of each stage provided by the invention can more sensitively realize the collision prediction, and the safety in the automobile operation process is improved.

The invention provides a PWM (pulse width modulation) dimming method for an LED (light-emitting diode). The PWM dimming method comprises the following steps: starting a first timer in an interrupt mode and a second timer in a free counting mode of a single chip microcomputer; making statistics on the number of interrupts of the first timer and count values of the second timer during the brightness change stage of the LED; performing at least one zero clearing on the count values of the second timer during the statistical process; and comparing the number of interrupts with the count values in real time, and outputting a PWM wave the level value of which changes along with the comparison result, wherein the PWM wave is applied to the LED for regulating the brightness of the LED. The invention further provides a dimming device corresponding to the method. The PWM dimming method and device for the LED disclosed by the invention can solve the problem of few PWM output ports of the existing cheap single chip microcomputer.

In a work vehicle according to the present invention, a control device calculates, for each of a plurality of speed-changing stages in a PTO transmission, an expected maximum rotational speed of PTO rotary power that is output from the PTO shaft when an engine rotational speed changing operation member is operated to a maximum extent, and shows, in a listed manner, the calculated results in a liquid crystal display part of a display device. The present invention can inform an operator of the maximum rotational speed of PTO rotary power that is output from the PTO shaft for each speed-changing stage in the PTO transmission without performing a speed changing operation on the PTO transmission.

The invention discloses a wavelength-changing tunable diode laser absorption spectrum gas detection device and method. The device comprises a laser, a circulator, a reflective probe, a photoelectric detector and a data conversion unit, wherein the laser outputs an optical signal of which the wavelength and light intensity change along a drive current cycle when excited, the optical signal is transmitted to the circulator, and the circulator receives the optical signal of the laser and transmits the optical signal to the reflective probe; the reflective probe contains an open light path with asection of fixed distance, so that interaction between the optical signal and tested gases is realized; and the optical signal returned by the reflective probe is transmitted to the photoelectric detector, and the optical signal is converted into a weak current analog signal to be output to the data conversion unit so as to obtain the tested gas concentration value. The light intensity change andwavelength change in each cycle are divided into two stages. A second light intensity change stage in which the wavelength covers a tested gas absorption line is compensated by utilizing a first lightintensity change stage in which the wavelength the far away from the tested gas absorption line, and the measurement accuracy and long-term stability are improved.

The invention discloses an authentication and key agreement method capable of resisting leakage of a password. The method comprises six parts: a system initialization stage, a user registration stage,a user login stage, a user authentication stage, a password changing stage and a key changing stage. The method provided by the invention helps the user to efficiently authenticate with the server and negotiate the session key, effectively resists the attack of the side channel, and is very high in practicability.

Provided is an electric assisted bicycle with a configuration wherein a drive unit for internally combining human powered drive force and auxiliary drive force is fitted with an interior transmission with automatically switchable speed-change stages. A drive unit disposed at an intermediate position between a front wheel and a rear wheel is internally fitted with a transmission mechanism (25) that transmits combined force of human powered drive force and auxiliary drive force from a motor while changing speeds by switching the combined force to a plurality of stages. The transmission mechanism (25) is fitted with a speed-change weight (81) of which the posture is changed in accordance with a centrifugal force when being rotated, and configured such that as the rotation speed of a crank shaft (7a) increases, the posture of the speed-change weight (81) is changed so as to be switched from low speed stage side to high speed stage side.

The invention discloses a manufacturing method of a middle-high voltage corrosion foil for an aluminum electrolytic capacitor. The manufacturing method comprises the following steps that a middle-highvoltage electronic aluminum plain foil is adopted and is soaked and pretreated by a sodium hydroxide solution; a hydrochloric acid and sulfuric acid solution is subjected to electrifying hole corrosion; a hydrochloric acid, sulfuric acid and phosphoric acid solution is subjected to chambering electrifying corrosion; salpeter solution soaking is carried out; and after pure water cleaning, primarynitrogen protection annealing and secondary nitrogen protection annealing heat treatment is carried out. Two stages of annealing heat treatment are adopted, and comprise a heating stage, a primary constant temperature stage, a linear temperature changing stage, a secondary constant temperature stage and a cooling stage. By means of two stages of nitrogen protection annealing heat treatment, the bending performance of the electrode foil is improved through the recovery and recrystallization process of aluminum metal. After the corrosion foil prepared through the method is subjected to formationtreatment, the bending performance is improved by 20% or above, and a great promotion effect is achieved on miniaturization of the aluminum electrolytic capacitor.

The invention provides a planar antenna array. The planar antenna array comprises multiple open waveguide units and waveguide signal transmission channels; each signal transmission channel is equipped with a multi-stage one-to-two power distribution network, and adopts a reflective structure which consists of multiple slowly-changed stage structures and slowly-changed stages; the open waveguide units, waveguide openings, a first polarized selection cavity, a second polarized selection cavity, a first polarized connecting opening, and a second polarized connecting opening are combined with multiple stage structures and interference convex structures, so as to effectively realize impedance conversion and impedance matching and expand frequency band bandwidth; in addition, the requirement on the manufacturing precision is relatively low, and the manufacturing cost is even lower; in addition, the invention provides a polar antenna with a polarization regulation function on the basis; the polar antenna comprises the polar antenna array with the above-mentioned structure, and a polarization regulation apparatus; the polarization regulation apparatus comprises a polarization synthesizer and a polarization receiving-transmitting device, wherein the common ports of the polarization synthesizer and the polarization-taking device are directly connected; and the polarization-taking device rotates along an axial line, and realizes dual-polarization receiving-transmitting and sharing through a minute quantity of microwave reactive devices.

To alleviate a shift shock of an automatic transmission when a vehicle travels at a certain vehicle speed and a speed range is changed over to a drive range from a neutral range. When a neutral range is selected by a range selection lever, a neutral determination part outputs a determination signal Nt. When a vehicle speed V is equal to or more than a vehicle speed reference value Vref, a vehicle speed determination part outputs a signal VJ2. When the vehicle speed V is less than the vehicle speed reference value Vref, a signal VJ1 is outputted. The signal VJ1 is inputted to a shift map, and a hydraulic control unit determines a speed change stage base on the vehicle speed and a throttle opening degree. When a signal VJ2 is inputted to the hydraulic control unit, the shift stage is set at the neutral range.