44results about How to "Minimize the impact on reliability" patented technology

The invention discloses a wireless sensor network early warning method and system based on clustering compressed sensing. The method comprises the following steps: S1) calculating optimal cluster number and optimum cluster head space distribution by a gateway according to geographic position and an energy consumption model of each sensor node in a wireless sensor network; S2) obtaining monitoring data in a cluster, and converting the monitoring data into binary reading and a binary bit string sequence according to a threshold value; S3) carrying out dense random projection and sparse random projection thereon to obtain a compressed sensing sequence, and carrying out reconstruction on the compressed sensing sequence to obtain a reconstructed sequence; S4) carrying out judgment according to estimated value of the reconstructed sequence, and summarizing the number of effective neighbor nodes executing a majority vote method; and S5) if the number of the effective neighbor nodes is larger than a preset threshold value, determining that the node has an abnormal event. Real-time performance and fault tolerance of the monitoring method can be improved; influence of the fault nodes on abnormal event detection reliability is reduced; and network energy consumption in the data collection process can be reduced.

The invention relates to a quick fault-tolerance detection method for monitoring an abnormal event by a wireless sensor network, and belongs to the technical field of the Internet of things. The sensor network is formed by self-organizing a large number of low-end sensor nodes; each node has finite power energy, communication capacity, calculation capacity and storage capacity and is generally arranged in an unattended severe environment; the possibility that each node makes a mistake is extremely high; and if the node makes a mistake, the network probably misjudges an event in a monitoring region. According to the method, the states of the nodes are adaptively managed by using confidence level, and failed nodes are removed from the sensor network, so that the influence of the failed nodes on abnormal event detection is reduced; and furthermore, a sliding window matching mechanism is used for detecting the change tendency of node monitoring data, so that whether the nodes can detect the abnormal event is forecasted. A simulation test shows that the reliability and the timeliness of detecting the abnormal event are improved, and the method can be widely applied to the fields of safety production monitoring, geological disaster monitoring, environment pollution monitoring and the like.

The invention relates to a high-power LED face-down chip, formed by P-N electrode extending sheet and silicon substrate with reflective layer, wherein the P-N electrodes have inactivate layer between; the characteristic semi-conductive silicon substrate has electric insulated layer above; the metal reflective layer is above the insulated layer; the P-N electrode extending sheet and the silicon substrate with reflective layer are face-down welded to form high-power LED face-down chip. And its production comprises that: on silicon substrate, using PECVD to deposit one layer of P-N electrode electric insulated layer as SiO₂ or Si₃N₄ insulated layer at 50-100nm thick; then using magnetic-control splash or electron beam to evaporate one layer of metal reflective layer at 200-300nm made from TiAl or TiAg. The invention can improve the lighting efficiency and radiation efficiency.

The invention discloses a non-contact human-computer interaction method and system. The method comprises the following steps of: emitting and receiving light, extracting and processing signals, and decoding and sending operating instructions. The system comprises an emitting device, a receiving device and a control device. An interaction function is realized by instructing parts to do some simple actions, and near-distance accurate operation is not required, so that far-distance human-computer interaction is realized to a certain extent. The method and system disclosed by the invention are particularly applicable to handheld electronic equipment.

The invention discloses a preparation method for polycrystalline silicon groove grid and capable of avoiding holes. The preparation method comprises the following steps of (1) defining a deep groove with dry plasma etching on a silicon base, (2) growing grid oxidation film on an entire silicon slice, (3) depositing polycrystalline silicon on the grid oxidation film, (4) coating and exposing photoresist by using deep groove etching layout, (5) etching the polycrystalline silicon in the deep groove and enabling the cavity to be exposed and to form a slope morphology through the dry etching procedure which produces high by-product polymer, (6) removing the photoresist, (7) dry back etching the polycrystalline silicon in a dry and return method and enabling the polycrystalline silicon to be formed as a V-shaped morphology, and (8) depositing the polycrystalline silicon a second time to fill the deep groove. The method can improve the filling power of the polycrystalline silicon groove grid and avoid the forming of cavities in filling polycrystalline silicon in the deep groove, and further improve the reliability of a component.

The invention relates to a control compensation system of quality of electric energy of a magnetic suspension train, which comprises a passive filter bank and an active power filter which is connected with the passive filter bank in series through a transformer; a bypass inductor is also connected on the transformer in parallel; and the system also comprises a high-order passive filter which is connected with the passive filter bank and the active power filter in parallel. The active power filter is controlled into a reverse harmonic current source to enable the fundamental reactive current to mainly pass through the inductor, the transformer and the inductor reduce the capacity of the active power filter, the active power filter and the passive filter bank together filter the harmonics, and the high-order passive filter mainly filters the high-order harmonics which can not be filtered by the active power filter and the passive filter bank. The compensation system is connected to the 20kV side of a bus in a tractive power supply system of a high-speed magnetic suspension train to shorten the distance between a compensation point and a point of common coupling (PCC), thereby shortening the length of a coupling line, further weakening the amplification effect on harmonics and voltage fluctuation by the circuit, and improving the quality of electric energy.

A tool magazine reliability test bench tool change position adaptive centering adjustment device and method belong to the mechanical adaptive adjusting field, and aim to solve the problems of low adjusting precision and complex operation and the time-consuming and labor-consuming problems in the prior art. The device comprises a measurement taper shank, an automatic mechanical detection device and a main-shaft bottom feeding unit; and a drive gear and a driven gear in the automatic mechanical detection device are integrally disposed in a tool-grabbing disc, a servo motor A drives the drive gear to rotate, a positioning adjusting rod is connected with the lower end face of a driven gear shaft through an adjusting screw, a measuring rod is connected with the upper part of the positioning adjusting rod through a positioning pin, the positioning pin is located on the axis of the driven gear shaft, a force sensor is fixed to the lower part of the positioning adjusting rod, and the force sensor is connected to the lower part of the measuring rod through a connecting spring. The measurement taper shank is coaxially installed on a mechanical main shaft, the tool-grabbing disc of the automatic mechanical detection device is clamped through a manipulator, and a control unit of a tool magazine reliability test bench controls a motion of the main-shaft bottom feeding unit according to a signal acquired by the force sensor.

The invention discloses a heterogeneous controller cluster service active scheduling system and method based on abnormal perception. The system comprises a state acquisition module, a communication agent module, an abnormal state perception module and a service active scheduling module. The method comprises the following steps: the communication agent module establishes connection with the controller and the switch; the state acquisition module acquires operating environment state parameters and load state parameters of the controller; the communication agent module obtains the flow table message issued by the controller and calculates the message credibility; the abnormal state sensing module updates abnormal parameters of the controller; the abnormal state sensing module judges whether the controller is abnormal or not; and the service active scheduling module selects the alternative controller and actively schedules the service of the abnormal controller. The method has high universality and independence, and when the controllers in the heterogeneous controller cluster are abnormal, the abnormal controllers can be timely and accurately discovered, and active scheduling can be carried out on the services of the controllers.

The invention provides a GaN-based HEMT device based on a substrate conductive hole and a preparation method of the GaN-based HEMT device. According to the method, a deep groove is formed in a substrate, and filled with a conductive material layer to form a conductive hole, and a source deep hole is prepared in an epitaxial layer structure, so that a source metal is connected to the conductive hole; after the front surface structure of the GaN-based HEMT device is manufactured, thinning is carried out to expose the conductive hole from the back surface of the substrate; and therefore, back etching of the substrate in the later period is avoided, damage of etching to the front surface structure of the device is avoided, the yield of the device is effectively improved, and production equipment and cost are saved. After the preparation of the front surface structure of the device is completed, complicated deep etching, electroplating and other process steps are not needed any more, so that the influence of the subsequent process on the reliability of the device can be reduced.

The invention discloses an optical fiber output large-power semiconductor laser module. The optical fiber output large-power semiconductor laser module comprises a semiconductor laser module to be coupled, metalized optical fibers and an optical fiber support. The semiconductor laser module to be coupled comprises a metal tube shell provided with a cavity body, and a welding support, an AlN heat sink and a laser chip which are successively fixed in the cavity body by welding. The metalized optical fibers comprise an output optical fiber and a self-focusing lens optical fiber. The self-focusing lens optical fiber comprises a self-focusing optical fiber and a lens arranged on one end surface of the self-focusing optical fiber, and the other end surface of the self-focusing optical fiber is welded with the output optical fiber. The aperture of the self-focusing lens optical fiber is larger than that of the output optical fiber, and the aperture of the self-focusing lens optical fiber is matched with the width of a luminous zone of the laser chip. The optical fiber support is fixed to the welding support by welding. The self-focusing lens optical fiber is fixed to the optical fiber support by welding. The self-focusing lens optical fiber and the laser chip are coupled and aligned. According to the invention, the aperture of the self-focusing optical fiber is matched with the width of the luminous zone of the laser chip, and all components in the laser module are fixed in a non-glue welding manner.

The invention provides a crawler belt tensioning device and crawler belt type engineering machinery, and relates to the technical field of engineering machinery. The crawler belt tensioning device comprises a cylinder body, a pull rod, a support, an ejector rod, a spring and an elastic buffering piece. One end of the cylinder body is connected to the pull rod; the support is slidably connected tothe pull rod and used for being connected with a guide wheel of a tensioning crawler; the end, away from the pull rod, of the cylinder body is connected to the ejector rod; and the ejector rod can extend out relative to the cylinder body to abut against a chassis limiting plate of the crawler-type engineering machine. The cylinder body is sleeved with the spring, one end of the spring is connectedto the cylinder body, the other end of the spring is connected to the support, the buffering piece is connected to the spring, and at least one part of the buffering piece is located between two adjacent coils of the spring. The crawler-type engineering machinery comprises the crawler belt tensioning device. The crawler belt tensioning device can reduce damage to the spring and reduce the influence on the reliability of the device and crawler belt type engineering machinery.

The invention discloses an axial force automatic balancing device, a water pump and an air conditioner. The axial force automatic balancing device comprises a pump body, an impeller arranged in the pump body and a pump cover arranged on the pump body; the impeller comprises a rear cover plate and a rear opening ring arranged on the rear cover plate, an annular groove in clearance fit with the rearopening ring is formed in the pump cover, and a balance cavity is formed among the rear cover plate of the impeller, the pump cover and the rear opening ring; and a balance hole communicating with the balance cavity is formed in the rear cover plate of the impeller, an annular boss is arranged on the inner surface of the pump cover, and part of the balance hole is covered with the annular boss. According to the axial force automatic balancing device, the impeller can reach a balance point during motion through the structure, so that automatic balancing of axial force is achieved, the influence of axial force on the reliability of the water pump can be reduced, and normal opening of the water pump is ensured.

The invention provides an air conditioning system. The air conditioning system comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger, a four-way valve and drying and filtering assemblies, wherein a circulating loop is formed by connecting of the compressor, the indoor heat exchanger, the outdoor heat exchanger and the four-way valve through a pipeline. External connectors are arranged on the pipeline. The drying and filtering assemblies are arranged on the pipeline through the external connectors in a series mode. According to the air conditioning system, by arranging the external connectors on the pipeline of the circulating loop, the drying and filtering assemblies can be arranged on the pipeline through the external connectors in the series mode, during the operating process of the air conditioning system, impurities and water in the pipeline can be automatically cleaned away by the drying and filtering assemblies, and the influence exerted on the reliability of the system due to engineering installation is lowered.

The invention provides an electronic cigarette for which an MEMS sensor is adopted. The electronic cigarette comprises the MEMS sensor which is used for smoking detection, a signal processing circuit,a control circuit and a smog generating device, wherein the MEMS sensor detects smoking air pressure of a user and outputs a detection signal, the signal processing circuit is provided with a signalinput end and a signal output end, the signal input end is connected with the MEMS sensor, the control circuit is connected with the signal output end of the signal processing circuit and generates acontrol signal according to an output signal of the signal processing circuit, and the smog generating device is connected with the control circuit. The electronic cigarette has the advantages that byusing the MEMS sensor to replace a traditional electret membrane, a larger space is provided with other modules like a lithium battery in an electronic cigarette pole, and meanwhile, the influence ofthe high-temperature and high-humidity environment on the reliability of the electronic cigarette can also be reduced when the traditional electronic cigarette is in use.

The invention relates to a liquid crystal display assembly and a liquid crystal display. The liquid crystal display assembly comprises a first glass substrate, a liquid crystal layer and a second glass substrate which are stacked, and is characterized by further comprising a first ITO conducting layer and a second ITO conducting layer which are arranged on the two opposite faces of the first glasssubstrate respectively; a third ITO conducting layer and a fourth ITO conducting layer which are arranged on the two opposite faces of the second glass substrate respectively, wherein the two opposite faces of the liquid crystal layer are attached to the second ITO conducting layer and the third ITO conducting layer respectively; a plurality of pieces of conductive cloth which are respectively and correspondingly arranged on the first ITO conductive layer, the second ITO conductive layer, the third ITO conductive layer and the fourth ITO conductive layer; and an electrostatic protection device which is in contact with the conductive cloths on the first ITO conductive layer, the second ITO conductive layer, the third ITO conductive layer and the fourth ITO conductive layer respectively toform a Faraday cage type structure for leading the static electricity to a ground end.

The invention discloses a wind power generation system, and belongs to the field of wind power generation. The wind power generation system comprises a rack, a generator unit and blades, wherein the generator unit is arranged on one side of the rack, and the rack and the generator unit are in transmission through an inclined gear; and a transmission box is arranged above the rack, the blades are arranged on the two sides of the upper portion of the transmission box, each blade is in transmission with the transmission box through a bevel gear, and the blade on each side comprises two S-shaped blades which are symmetrically distributed in a central symmetry manner. According to the wind power generation device, the defects that in the prior art, the wind power utilization rate of wind powergeneration is low, and the production cost is high are overcome; and the wind power generation system is low in cost, high in applicability, simple in structure, convenient to manufacture and maintainand wide in application range.

The invention relates to the technical field of semiconductor packaging, and discloses a packaging structure and a packaging method of a semiconductor chip. The packaging structure of the semiconductor chip comprises a wafer, an insulation structure and a conductive part. A functional area and electrodes are arranged on the first surface of the wafer, the electrodes are distributed at intervals in the circumferential direction of the functional area, and the side walls, away from the functional area, of the electrodes are obliquely arranged; the insulating structure covers the first surface, one side of the insulating structure facing the wafer is provided with an accommodating space, the functional area is arranged between the accommodating space and the first surface, and the side wall of the insulating structure is obliquely arranged and is coplanar with the side wall of the electrode away from the functional area to form a cutting slope inclining towards the middle of the insulating structure; and the conductive part covers the cutting inclined surface and is electrically connected with the electrode, and the conductive part extends to the end surface, opposite to the wafer, of the insulating structure along the outer contour of the insulating structure. According to the invention, the conductive part is of a planar structure on the side wall of the chip, so that the number of inflection points on the conductive part is reduced, and the structural strength and durability of the conductive part are ensured.

The invention discloses a high pressure air bottle assembly mounting method for a drilling ship. The drilling ship has a main deck and a first lower deck, wherein an accommodation compartment is formed between the main deck and the first lower deck, a high pressure air bottle assembly is arranged in the accommodation compartment through a base, the high pressure air bottle assembly is a multi-layer arrangement mode, each layer includes multiple high pressure air bottles, the layer of high pressure air bottles close to the first lower deck are arranged on the base in a pressed mode, the layer of high pressure air bottles away from the first lower deck are correspondingly arranged on the upper layer of high pressure air bottles in a pressed mode, and tail ends of the high pressure air bottles have release ports. The mounting method comprises steps that the base is arranged on the first lower deck; the multiple layers of high pressure air bottles are sequentially arranged on the base; first ends of multiple columns of high pressure air bottles are communicated with multiple pipelines in one-to-one correspondence, and the multiple pipelines are communicated with a main pipeline; the base and the first lower deck form a first inclination angle, and the first inclination angle is greater than 1 DEG and is smaller than 3 DEG. The mounting method is advantaged in that influence of steam on reliability of target equipment can be reduced.