42results about How to "Increase the occasion" patented technology

A method for uplink burst equalization in broad wide access system, using the form of combining pre-training and burst equalization, that is, before transmitting user data, training the equalizer, then starting transmitting user data, in which, the equalizer uses decision user data as reference to track the changed wireless channel; if the change of channel exceeds the tracking region of equalizer, for example, the error rate exceeds threshold 1 but doesn't exceed threshold 2, the burst equalization will be performed; if the channel change exceeds the equalization region of equalizer, for example, the error rate exceeds threshold 2, the training will be performed again. By using the form of combining pre-training and burst equalization, setting different thresholds for handoff, the present invention greatly prolongs the intervals of subsequent pre-training process, thereby reducing the times of pre-training and increasing the effective bandwidth; By introducing burst equalization process, the present invention also decreases the requirement of system on operation occasion (for example, the static channel or the interval of bursts should be short), thereby increasing the application occasions of product.

An exhaust purification device is provided to selectively perform a combustion purge control and an exhaust addition purge control in response to an operation state of the internal combustion engine. The combustion purge control process is performed in the case where a NOx occlusion amount of a NOx catalyst is larger than or equal to a first threshold value, and the exhaust addition purge control process is performed in the case where the NOx occlusion amount of the NOx catalyst is larger than or equal to a second threshold value which is larger than the first threshold value.

A soft box includes a housing and a main body detachably connected to the housing by a connecting device. The connecting device includes a first locking portion and a second locking portion. An installing base is connected to the bottom of the housing and the main body is embedded in the installing base, thereby the housing can rotate around the main body. The first locking portion passes through the installing base and the main body to tightly fix with the second locking portion. The housing includes a snap-fitting member and a light passageway which is a cylindrical hole and a flash lamp cap fixing device formed therein. The flash lamp cap fixing device includes a supporting platform and a pressing plate opposite to the supporting platform and having an adjustable position relative to the supporting platform. The present disclosure can quickly disassembly and be easy to carry.

The present invention provides a method for measuring the speed of a permanent magnet synchronous motor based on a rotary transformer, comprising: S1, using the rotary transformer to collect the angle of the motor; S2, FPGA reads the bus data of the rotary transformer decoder, and uses the bus data bit signal The change of the speed measurement pulse is generated, the time interval between two speed measurement pulses is measured, and the time interval is sent to the processor; S3, the processor uses the data of the time interval to calculate the speed measurement result. The method of the invention adopts FPGA to realize the generation of speed measurement interval pulses and realizes the timer counting between interval pulses, and the processor receives the timer count of FPGA and performs calculation to realize the speed measurement under low-speed driving. The method of the invention is simple to implement, has high speed measurement accuracy, and can easily realize the high-performance control of the low-speed drive of the permanent magnet synchronous motor under the speed measurement mode of the rotary transformer, and improves the dynamic and steady-state control performance of the permanent magnet synchronous motor under the low-speed drive.

The invention discloses a two-wire cable power supply device, which comprises a power supply device and a first data coupling end and a second data coupling end respectively connected thereto; the first data coupling end and the second data coupling end are connected in series An isolation network for direct communication, used to isolate the DC power supply signal loaded by the first data coupling terminal and the second data coupling terminal, so that the first data coupling terminal and the second data coupling terminal output the positive and negative signals of the DC power supply respectively . The invention also discloses a two-wire cable power supply method, a two-wire cable power receiving device, a two-wire cable power receiving method, and a system and method for realizing power supply through the two-wire cable. Through the device, system and method disclosed in the invention, the application range and occasions of the PoE technology are expanded.

The invention discloses an intelligent delivery system and a delivery method of the intelligent delivery system, and relates to the technical field of object sorting or delivering. The intelligent delivery system comprises a delivery cabinet, a postman mobile terminal, a pickup person mobile terminal and a background server. A plurality of storage cells and a control cell are arranged on the delivery cabinet. A control panel, a battery, a display screen embedded in the surface of the control cell, a keyboard embedded in the surface of the control call, and a control cell electronic control lock used for locking the control cell are arranged in the control cell. Each storage cell is provided with a storage cell bar code and a storage cell electronic control lock used for locking the storage cell. By means of the system and the method, the intelligent delivery and pickup functions can be achieved, information delivery is achieved through a mobile phone of a deliver, a control system is simplified, the long-time battery power supply can be achieved, the service life is long, places and occasions where the intelligent delivery system can be installed are greatly expanded, and by setting the new delivery method, the safety and reliability of the intelligent delivery system are improved.

The present invention discloses dip angle type revolving seat for bending 3D bent pipe inside one common double-headed pipe bender. The dip angle type revolving seat includes one revolution body comprising one upper seat and one lower seat hinged mutually through one central pin shaft, and one locking device set between the upper seat and the lower seat for locking them. The upper seat and the lower seat can rotate around the pin shaft, and each of the upper surface of the upper seat and the lower surface of the lower seat has assembling side with assembling holes. The common double-headed pipe bender with the dip angle type revolving seat mounted may be used in bending not only 2D bent pipe but also 3D bent pipe.

The invention relates to an improved axial force balance mechanism of centrifugal pump impeller, which consists of a centrifugal pump impeller and a pump cover, wherein, the backside of the centrifugal pump impeller is fixed with a plurality of radial back blades; the radial back blades are arrayed along the circumference direction in a spacing manner; gaps are arranged between the radial back blade and the outer circumference of a shaft sleeve of the centrifugal pump impeller; the back end of the each radial back blade is fixed with a ring-shaped disc; the inner end surface of the pump cover is provided inside with a convex platform which extends into the gap between the radial back blade and the shaft sleeve of the centrifugal pump impeller. The back blade conducts a circumferential motion with the rotation of the impeller, the back blade can produce a pressure differential to balance an axial force or to reduce a volume loss or to reduce a soil and sand abrasion. The volume of the back blade in the invention is smaller than that of the prior back blade so as to reduce the material consumption quantity and simultaneously to reduce the processing hour as well; the requirement on the axial gap is not high, thereby the application scope and condition can be widened; when the impeller is rotated, the energy loss of the liquid is reduced, and simultaneously the axial vortex and the secondary backflow are reduced, the efficiency is improved.

The invention relates to a frequency-modulable rotary piezoelectric power generation device, which belongs to the technical field of new energy, and is suitable for collecting rotary mechanical energy with wide frequency in the environment. The power generation device is composed of a frequency modulation component and an energy conversion component, wherein the frequency modulation component can be a first-stage frequency modulation component or a second-stage frequency modulation component or a frequency modulation component commonly functioning by combined action of the first-stage frequency modulation component and the second-stage frequency modulation component. The first-stage frequency modulation component comprises a pedestal, a first-stage frequency modulation bolt, upper and lower guide rods, a left bracket and a disk. The second-stage frequency modulation component comprises a second-stage frequency modulation bolt, a sliding block, a positioning block and a positioning block screw. The frequency-modulable rotary piezoelectric power generation device related by the invention has 4 structural forms. The Frequency-modulable rotary piezoelectric power generation device modulates the working frequency bandwidth of a rotary piezoelectric power generator by using the frequency modulation component, and broadens the application range and occasions of the rotary piezoelectric power generator.

The invention relates to the field of tension sensors, and discloses a wearable tension sensor for a gesture interaction system and a preparation method thereof. The wearable tension sensor comprises a flexible tension sensor and a hand fabric, wherein the flexible tension sensor is integrated on the hand fabric, and comprises a flexible blocking layer, a sensitive material layer, an electrode and a protecting layer which are sequentially arranged from bottom to top, and the sensitive material layer is of a three-dimensional porous structure. The invention also discloses the preparation method of the wearable tension sensor. The wearable tension sensor has the advantages that the sensitivity is high, the response is rapid, the sensor can be attached, worn and washed, and the functions of recognition on the gestures of users, gesture control and human-machine interaction are realized. The preparation method has the advantages that the process is simple, and the operation is convenient.