34results about How to "Avoid reliability impact" patented technology

The invention discloses an electronic phase change detection circuit of a position sensor-free brushless direct current motor, which is characterized in that a back electromotive force zero crossing point detection circuit detects a three-phase back electromotive force zero crossing point and sends the detect results isolated by a photoelectric isolating circuit into a microprocessor unit for further processing; a motor circuit, a detection circuit and the microprocessor unit are isolated from one another by the photoelectric isolating circuit, so that the interference generated by electric signals in the motor circuit and the detection circuit to an input signal of a microprocessor is prevented, the work stability and the system reliability of the microprocessor unit are enhanced, and a back electromotive force phase position is compensated through phase compensation information presorted in the microprocessor unit; and the back electromotive force zero crossing point and the phase change processing are determined, and further, the position of a rotor is determined without the adoption of the position sensor, so that the effect of the position sensor on the system reliability in the special environments of high temperature, high voltage, high interference, high vibration and the like is avoided, and further, and the system reliability is ensured.

The invention discloses an integrated LED packaging structure. The integrated LED packaging structure is characterized by comprising a ceramic substrate, an insulating layer covering the ceramic substrate, an inverted LED chip arranged on the ceramic substrate, a chip capacitor, a chip resistor, a current regulative diode, a rectifier and packaging glue covering the inverted LED chip, wherein the ceramic substrate is provided with a positive electrode and a negative electrode, and the chip capacitor, the chip resistor, the current regulative diode and the rectifier are arranged on the ceramic substrate. The chip capacitor, the chip resistor, the current regulative diode and the rectifier are collectively known as driving ICs. According to the integrated LED packaging structure, the inverted LED chip and the ceramic substrate with matched coefficients of expansion are adopted, the design of gold wires does not exist, the phenomenon that the packaging glue influences the product reliability when the packaging glue is expanded due to cold and heat changes is avoided, meanwhile, the driving ICs and the inverted LED chip share the ceramic substrate, a radiating channel of a power driving module is added, the product size is reduced, large space and the higher degree of freedom are provided for the design of the radiating module, the product working temperature is lowered, and the product service life is prolonged.

The invention provides an LTCC device manufactured based on a titanium substrate electroplating pattern transfer method, and the method comprises the steps of manufacturing an anti-electroplating maskon the surface of a titanium substrate according to a designed circuit pattern; electroplating the titanium substrate to manufacture a copper circuit pattern; carrying out tape casting of the ceramicslurry directly after the anti-electroplating mask is removed; baking, drying and stripping to obtain an LTCC raw ceramic chip; and carrying out lamination, isostatic pressing and sintering on the prepared LTCC raw ceramic chips of different layers to prepare the LTCC device. According to the invention, the LTCC inner electrode electronic interconnection copper circuit is manufactured through anelectroplating method, the dependence of the existing LTCC manufacturing technology on the electronic paste can be improved, most technical problems caused by the defects of the electronic paste are solved, and the reliability and stability of an electronic interconnection circuit of a package substrate are effectively improved.

The invention discloses a photovoltaic power generation device capable of automatically tracking, comprises a fixing plate, wherein left and right sides of the fixing plate bottom are fixedly connected with a first supporting plate, the bottom of the first supporting plate is movably connected with a rolling wheel, a bottom plate is arranged below the fixing plate, and a fixing groove adapted to the top of the bottom plate and corresponding to the rolling wheel is arranged. In accordance with that present invention, rotating shaft, first roller, Belt, second roller, Fixed shaft, rolling bearing, first support plate, rolling wheel, Stationary plate, stabilized motor, stabilized shaft, The rotating gear, the gear bar, the second connecting block, the second rotating shaft, the connecting rod, the first rotating shaft, the first connecting block, the transverse plate, the stabilizing plate and the solar panel cooperate with each other to realize the automatic tracking effect, solve the problem that the photovoltaic power generation does not have the automatic tracking ability, and the photovoltaic power generation device can carry out the angle deviation according to the needs, thus bringing great convenience to the users.

The invention provides a modeling and reliability simulation method for fault mechanism triggering. A physical process that a fault mechanism is triggered is described through a random process; a fault time model of two triggering relationships of a degradation-degradation type and a degradation-overstress type is provided; and different models are provided for the continuous degradation process and the discrete degradation process, so that the problem that the reliability distribution of each component is purely considered and the correlation between fault mechanisms is not considered when the reliability of the system is calculated by the traditional reliability modeling method is solved, and the fault time distribution and the reliability distribution of the system are deduced on the basis. According to the method, a new idea is provided for describing and evaluating the trigger effect in the complex system and solving the influence of the trigger effect in the complex system on thesystem reliability, and the calculated reliability index is more scientific and reasonable.

The invention relates to the technical field of spring machining, and particularly provides V-shaped conveying type spring conveying and chamfering equipment. The V-shaped conveying type spring conveying and chamfering equipment comprises a machine frame, a feeding vibration disc, a V-shaped conveying line and a grinding unit are sequentially arranged on the machine frame according to the conveying line of springs, the V-shaped conveying line comprises a sliding slope unit and a climbing slope unit, and the sliding slope unit is further sequentially provided with a large end and small end detecting and discharging mechanism and a wire diameter detecting assembly from top to bottom. The V-shaped conveying type spring conveying and chamfering equipment solves the problems that in the springfeeding process of existing spring machining equipment, the springs need to be manually placed on a conveying belt one by one, so that the labor intensity of workers is high; and when the springs aretransported, screening and adjusting cannot be carried out on the large ends and the small ends of the springs, rejecting, screening and adjusting on a detection line with specific machining requirements for the diameters of the springs cannot be carried out, and unqualified springs cannot be automatically removed through screening when the springs are transported. The invention further provides ausing method of the V-shaped conveying type spring conveying and chamfering equipment. The using method is used for improving the spring chamfering efficiency.

The invention discloses a harvester driving device. The harvester driving device comprises a variable pump connected with an engine of a harvester. The variable pump is connected with a constant displacement motor and a variable displacement motor. The constant displacement motor is in drive connection with a gearbox, the gearbox is in drive connection with a front axle of the harvester, a clutch is arranged on a rear axle of the harvester, and the variable displacement motor is in drive connection with the rear axle of the harvester through the clutch. By means of the walking driving device of the hydraulic four-wheel drive harvester, the problem that when the harvester is in a plant transfer working condition, a variable displacement motor rotates at high speed, and power losses are caused is solved, meanwhile, the influence of high-speed rotation of the variable displacement motor on the reliability of the variable displacement motor is avoided, and the reliability of a hydraulic system is improved.

The invention relates to the technical field of air conditioners, in particular to a fluorine pump air conditioner unit cabinet which comprises a cabinet body with a mounting cavity and an isolation cavity. An electric control box is arranged in the mounting cavity and is adjacent to the isolation cavity; one side of a radiator is connected with an electric control board in the electric control box, and the other side of the radiator penetrates out of the electric control box and is arranged in the isolation cavity. The isolation cavity is provided with a first air inlet and a first air outletwhich are communicated with the outside, the first air inlet is located under the radiator, and the first air outlet is located over the radiator; the isolation cavity forms a natural convection flowchannel through the first air inlet and the first air outlet. According to the fluorine pump air conditioner unit cabinet, through arrangement of the isolation cavity, heat of the radiator can be directly dissipated into the external environment, the temperature of the electric control box can be lowered, meanwhile, the overall temperature in the cabinet body is lowered, and the fluorine pump airconditioner unit cabinet can be used under the condition that the environment temperature is high; in addition, the mounting cavity of the cabinet body can sealed while heat dissipation is achieved,and influence of external moisture and the like on the reliability of internal electric control devices is avoided.

The invention relates to a seal face mask with stacked films. According to the technical scheme provided by the invention, the seal face mask with stacked films comprises a mask housing and a mask body cavity formed in the mask housing. At least two circles of seal ring films are arranged in the mask body cavity, are evenly distributed in the mask housing and are close to the mouth portion of themask body cavity, and a plurality of seal ring films in the mask housing are stacked. When the face mask is put on the face for respiration, the multiple seal ring films can be in contact with the face to strengthen the seal state when the mask housing attaches to the face. At least two circles of seal ring films are arranged in the mask housing, the seal ring films are stacked, two or more seal ring films are utilized to be in contact with the face, the layering sense of seal can be effectively improved, the reliability of seal is improved, the seal ring films can be matched with an alimentary canal catheter through positioning grooves and connecting seal pieces, the alimentary canal catheter is prevented from affecting the sealing performance during venting of the mask, and the seal facemask is convenient to use, safe and reliable.

The invention provides a series bi-axial baffle automatic adjusting coal powder sorting device with the returned powder grinding function. An inner barrel is arranged between a shell and an inner cone. A sorting channel and a powder return channel are arranged. The upper end of the inner barrel is provided with a powder return channel inlet, and a powder return channel outlet is formed in the lower end of the inner barrel. A powder return amount control device is fixedly arranged between the inner barrel and the shell. A grinding device is arranged below the powder return amount control device, and after returned powder is ground through the grinding device, the returned powder enters the sorting channel again through the returned powder channel outlet. The rotating strength of an air and powder mixture in the sorting channel is automatically adjusted through baffles, qualified coal powder is sorted out, disqualified coal powder enters the powder return channel in the device, under the condition that no coal pulverizing system is additionally arranged, the output and sorting efficiency of a coal mill are greatly improved, the coal milling unit consumption of the coal pulverizing system is greatly reduced, and the purposes of energy saving and emission reduction are achieved. The series bi-axial baffle automatic adjusting coal powder sorting device can also be applied to cement, metallurgy, petrochemical industries and the like.

The invention provides a wireless debugging method of an online signal acquisition unit, which comprises the following steps of: connecting a wireless router wan port with a signal acquisition stationnetwork port, and connecting a wireless router lan port with an external optical fiber transceiver network interface; turning on the power supply of the signal acquisition station, and performing network connection setting on the switch of the signal acquisition station and the wireless router; enabling the modulation device to be in network connection with the wireless router, and enabling the modulation device to debug an equipment online signal acquisition unit of the signal acquisition station through a wireless network. According to the invention, the debugging device directly acquires the signal unit online through the WIFI access device, so that the influence of debugging of the pluggable network cable on the line reliability is avoided; debugging and maintenance personnel can conveniently monitor the state of the equipment on-line acquisition signal unit and maintain and process failure measuring points; by adopting the wireless debugging method, the equipment online signal acquisition unit which is inconvenient for debugging personnel to arrive can be debugged, so that the debugging safety is improved.

The invention provides a request processing method and device, a server and a computer readable storage medium. The method comprises: mirroring an operation request received from a user terminal to obtain N mirroring requests, N being an integer greater than or equal to 2; sending the operation request to an original server, and respectively sending the N mirror image requests to N mirror image servers; within a first preset duration of sending the operation request, receiving all response information sent by the original server and the N mirror image servers according to the operation request and the N mirror image requests; and judging all the response information through a preset judgment strategy to obtain a detection result representing whether the operation request has a security threat or not. Therefore, all response information for all the requests can be collected, the comprehensive response information can improve the accuracy and reliability of security threat judgment on the operation request, and the judgment reliability can be prevented from being influenced by incomplete collection of the response information.

The invention relates to the technical field of chip packaging, in particular to an airtight packaging structure and method for a microwave and millimeter wave chip with a BGA interface, and the structure comprises a substrate BGA ball mounting array structure, wherein an airtight substrate is arranged on the substrate BGA ball mounting array structure, a chip assembly is arranged on the upper surface of the airtight substrate, and the substrate BGA ball mounting array structure penetrates through the airtight substrate and is in communication connection with the chip assembly; a surrounding frame is arranged on the airtight substrate around the chip assembly, and an airtight cover plate is arranged on the surrounding frame to form an airtight cavity; an antenna radiation part is arranged on the airtight substrate, a bonding end is arranged on the airtight substrate in the airtight cavity, the antenna radiation part penetrates through the airtight substrate and is connected with the bonding end, and the chip assembly is in communication connection with the antenna radiation part through the bonding end. According to the invention, the chip assembly is connected with the antenna radiation part through the bonding end, and there is no need to arrange a connector or an adapter outside the airtight cavity, thereby greatly reducing the link loss, the size and cost of the packaging structure, enabling the production and manufacturing to be more convenient and efficient, and improving the service life and reliability of the packaging structure.

The invention discloses a cellular structure of a power semiconductor device, and a manufacturing method of the cellular structure. The cellular structure comprises: a first conductive type epitaxiallayer positioned on the surface of a first conductive type substrate; second conductive type base regions having preset junction depths and located at two sides of the middle portion of the epitaxiallayer; a channel layer positioned on the surface of the second conductive type base regions and in contact with the middle portion of the epitaxial layer; a barrier layer positioned on the surface ofthe channel layer; a dielectric layer positioned on the barrier layer close to the middle portion of the epitaxial layer and a gate electrode metal positioned on the dielectric layer; a source electrode metal positioned on the barrier layer far away from the middle portion of the epitaxial layer, and isolated from the gate electrode metal by an insulating layer; and a drain electrode metal positioned at the bottom of the first conductive type substrate. According to the invention, by arranging the AlGaN/GaN heterojunction, the channel carrier mobility is greatly increased, the on-resistance isreduced; and the gate oxide layer is not arranged, so that the influence of gate oxide failure on the reliability of the device is avoided, and the device has high voltage endurance capability.