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530results about How to "Work reliably" patented technology

Bandwidth-adjustable operational amplifier circuit

ActiveCN103219961AWork reliablySmall fluctuations in performanceDifferential amplifiersAmplifier modifications to extend bandwidthRadio frequencyActive power filter
The invention discloses a bandwidth-adjustable operational amplifier circuit. The operational amplifier circuit comprises a bias circuit, a fully differential operational amplifier main circuit and a common mode feedback circuit, wherein the bias circuit is used for providing stable bias current irrelevant to temperature and a process for the fully differential operational amplifier main circuit and the common mode feedback circuit; the fully differential operational amplifier main circuit is of a two-stage amplifying rail-to-rail output structure, and is used for providing gain and required bandwidth under the action of the bias current and outputting a common mode level to the common mode feedback circuit; and the common mode feedback circuit is used for stabilizing the common mode level output by the fully differential operational amplifier main circuit to a constant voltage. The bandwidth-adjustable operational amplifier circuit disclosed by the invention can be widely applied to radio frequency and analogue integrated circuits, such as active power filters, trans-impedance amplifiers and the like which need to work under various bandwidths. The bandwidth-adjustable operational amplifier circuit has the advantages that the power consumption is low, the integration level is high, the configuration is simple, and the working is stable, and adapts to various different load conditions.
Owner:INST OF MICROELECTRONICS CHINESE ACAD OF SCI

Deep-sea sediment continuous pressure maintaining coring submarine drilling machine and operation method

InactiveCN102913162ACompact structureWork reliablyCore removalSeabed sedimentSubmarine
The invention discloses a deep-sea sediment continuous pressure maintaining coring submarine drilling machine. A sampling pipe manipulator, a plurality of spud legs, a derrick, a drill pipe manipulator, a pipe rack, a hydraulic system, hydraulic clamping pliers, a drill pipe clamping base and an underwater control system are arranged respectively on a base, and a main body frame in installed on the base fixedly; a plurality of groups of spud legs and pile shoes of the spud legs are arranged on the base, flipping oil cylinders are hinged among the pile shoes and the spud legs, and the inner side of the upper end of each of the spud legs is hinged with a lifting oil cylinder; and the pipe rack is arranged on the upper surface of the base, a pressure maintaining drill pipe and a sampling pipe are arranged in the pipe rack, and an underwater top drive is installed in the derrick. According to the drilling machine, the drilling machine is lowered into the seafloor through an armor of an offshore platform, after the machine is lowered into the seafloor in position, bottom sediments are subjected to low-disturbance drilling and continuous multi-section coring, at the same time, each section of rock cores are subjected to operation such as pressure maintaining processing, and the deep-sea sediment continuous pressure maintaining coring submarine drilling machine has the advantages of being compact in structure, reliable in working, small in volume, light in weight, high in working efficiency, low in disturbance and high in coring efficiency.
Owner:BAOJI PETROLEUM MASCH CO LTD

Infrared imaging spectrometer based on light beam splitter and manufacturing method

The invention discloses an infrared imaging spectrometer based on a light beam splitter and a manufacturing method and relates to the field of earth observation imaging spectrometers. In order to solve the problems that an interference beam splitting system in an existing imaging spectrometer is large in size, the light weight of the system cannot be conveniently achieved, a slit related to the spatial resolution is contained in the system, and the luminous flux entering the system is limited, a grid type beam splitter system is introduced in to replace a beam splitter and a compensation board in the system, and the advantages of the small size and the light weight are achieved. The light weight of the system is achieved, meanwhile, convenience is brought to design of a whole optical system, the system does not contain a slit, compared with a spatial modulation Fourier transform imaging spectrometer, the luminous flux of the system is greatly improved, the slit in the spatial modulation Fourier transform imaging spectrometer is removed, the high spectral resolution is achieved, and meanwhile the signal to noise ratio of the system is effectively improved. The infrared imaging spectrometer is based on a Michelson interferometer structure, and the reliability of the system is greatly improved.
Owner:CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI

Forming method of uneven high-precision laser additives

The invention discloses a forming method of uneven high-precision laser additives. The method comprises the steps of forming additives by adopting an arc heat source; driving a laser displacement sensor to scan the surface profile of an additive forming piece, and calculating the surface accuracy of a workpiece according to the deviation of measured values of the sensor; inputting the accuracy into a modeled controller, and reconstructing a surface model of a part by the controller, so that the difference with the original surface accuracy is obtained, repair parameters of different areas in the surface of the part are determined, and control measures are sent; and inputting the repair parameters into a robot control cabinet, and applying laser heat sources with different energy and frequency to the different areas in the surface of the workpiece by the control cabinet according to the repair parameters. After repair, the laser displacement sensor is driven again so as to scan the surface profile, whether the repaired workpiece reaches the standard is determined, and if the repaired workpiece does not reach the standard, the workpiece is repaired again until the workpiece reaches the standard. According to the method, the surface accuracy of a laser additive member can be effectively increased, so that the quality of the laser additive forming piece is increased.
Owner:NANJING UNIV OF SCI & TECH

A monitoring method and system based on heterogeneous network

The present invention discloses a monitoring method based on a heterogeneous network. The public network segment of the heterogeneous network contains an independent public network server with a fixed IP address, a router with the function of network port mapping, which can send UDP data packages back and forth among client ends, a front-end server and the public network server, and the monitoring method applying callback technology and transcoding technology to realize direct transmission of monitoring data in the heterogeneous network. Meanwhile, the present invention also discloses a monitoring system based on the heterogeneous network, the public network server is connected with the front-end server system and the client-end systems via an IP network, and the front-end server system and the client-end systems are connected with one another via the UDP network protocol. The front-end server in which an embedded media processor and an embedded realtime multitask operating system are built is used to process the received front-end system data that is then sent to client ends, and therefore the system is enabled to support spot management and automatic alarming and support multiple platforms, network protocols, devices and access mothods and multi-point simultaneous access.
Owner:GUANGDONG ZHICHENG CHAMPION GROUP

Well blowout preventer mounted in drilling column and automatically controlled in well

The invention relates to a well blowout preventer mounted in a drilling column and automatically controlled in a well, which is capable of automatically closing the well during the well kick or the well blowout of oil-gas fields in the process of drilling the well. The invention is capable of automatically controlling the well blowout and also unlocking the blowout preventer in time so as to ensure the continuousness, safety and reliability in the process of drilling the well. The technical scheme is: a drilling tool slide valve assembly comprises a slide valve joint, a slide valve body and a slide valve seat, one end is connected to the drilling column and the other end is connected with a well blowout preventer main body. One end of the collar of the well blowout preventer main body is connected with the slide valve joint and a central tube, the collar thereon is provided with two stepped annular grooves, a clamp spring is mounted on a piston and in contact with the inner wall of the collar, a clamp pin and a clamp pin spring are mounted in the flute of the central tube, a slip ring sealing ring is mounted in the flute of the inner wall of a slip ring, a protrusion-preventing ring is mounted at the junction of a rubber barrel and the slip ring, one end of a support ring is connected with the valve body, the other end thereof is connected with the rubber barrel and the protrusion-preventing ring to form a blowout-preventing sealing device. The invention has simple structure, reliably works, is capable of effectively preventing the well blowout, and improves technical benefit and economical benefit.
Owner:SOUTHWEST PETROLEUM UNIV

High voltage power supply for direct current characteristics test of zinc oxide arrester

The invention relates to a high voltage power supply for a direct current characteristics test of a zinc oxide arrester, comprising a control circuit module, a PWM generator, an MOSFET driver and a power tube, a high frequency transformer, a protective circuit and a voltage doubling rectifying circuit, wherein the low voltage output end of high frequency transformer is connected with a sampling resister, a current measurement terminal and a current feedback circuit; the output end of the voltage doubling rectifying circuit is connected with a voltage divider, the voltage measurement terminal and the voltage feedback circuit; the control circuit module is provided with a constant voltage control circuit, a constant current control circuit and a cascaded constant voltage/constant current change-over switch; the signal of the feedback circuit is compared with a set signal value, is input in an error amplifier in the constant current control module and enters into a closed loop control system to ensure stable output signals. The invention has stable performance, reliably operates among two modes of constant voltage and constant current, has a built-in protective circuit and can ensure power supply safe operation.
Owner:武汉特试特电气有限公司

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

Spiral demoulding device of bevel gear injection mold

The invention discloses a spiral demoulding device of a bevel gear injection mold. The spiral demoulding device of the bevel gear injection mold comprises a rotary mold cavity (1), a moving mold loading plate (2), a pressing plate (3), a bearing A (4), a bearing B (4) and an ejector sleeve (5). According to the spiral demoulding device, because the device formed by the components above is adopted, the side wall of the rotary mold cavity is provided a bevel gear molded surface which is used for forming a bevel gear product and is also named as bevel gear cavity; the rotary mold cavity can be rotatably arranged between the moving mold loading plate and the pressing plate through the bearing A and the bearing B; the upper part of a core rod of the ejector sleeve is used as a penetrating core for positioning a direct gear embedded element and is positioned in the center of the bevel gear cavity; the lower end of the sleeve core rod is fixedly connected with a base plate of the moving mold; the upper end of a sleeve of the ejector sleeve is positioned on the bottom of an embedded element hole below the bevel gear cavity; and the lower end of the sleeve part is fixedly connected with a top plate of the moving mold. Through the technical scheme that the rotary mold cavity is driven to rotate by the bevel gear product, one mould which can be used for producing multiple bevel gear injection molds by one mold can be simplified in structure, and reduces faults and the cost.
Owner:NINGBO SIMAI IND TECH

Automatic gear clearance elimination mechanism

The invention discloses an automatic gear clearance elimination mechanism, used for eliminating a clearance of a transmission gear. The transmission gear is meshed with a fixed gear and is connected to a transmission shaft through a connecting piece, a movable gear is fixed on the fixed gear through a pin or a key, a guide sleeve is installed in an end surface hole of the movable gear, a spring is installed in a hole of the guide sleeve, a locking nut presses a press ring to tightly pressing the spring, and the transmission gear, the fixed gear and the movable gear are all helical gears. By turning the locking nut, the movable gear moves along the connecting piece, a clearance generated by abrasion between the transmission gear and the fixed gear is eliminated, and the clearance of the gear is automatically eliminated. In the invention, the transmission gear and the fixed gear in equipment do not needed to be loosened and re-adjusted for eliminating the gear clearance, the gear clearance can disappear automatically under the action of the pre-tightening force of the spring just by turning the locking nut in the process of initial installation to adjust the pre-tightening force of the spring. The invention has the advantages of convenient installation and use, stable and reliable work and free maintenance.
Owner:XIANGYANG BOYA PRECISION IND EQUIP

Horizontal well high-pressure resistant packer for reservoir transformation

The invention relates to a horizontal well high-pressure resistant packer for reservoir transformation, which is applied to reservoir transformation of petroleum extraction. 3 to 8 sections of self-expansion rubber cylinders are mould-pressed and vulcanized on the outer wall of a pipe body; an annular middle baffle ring is fixed between the two adjacent sections of self-expansion rubber cylinders through a fastening bolt; one limited ring is fixed on each outer end part of each self-expansion rubber cylinder at the two ends through the fastening bolt; each self-expansion rubber cylinder consists of a self-expansion rubber cylinder body, self-expansion rubber cylinder back pressure rings and metal rings; the self-expansion rubber cylinder back pressure rings are arranged at the two ends of the self-expansion rubber cylinder body; and the metal rings are vulcanized on the surfaces of the outer walls of the self-expansion rubber cylinder back pressure rings. The horizontal well high-pressure resistant packer for the reservoir transformation can work reliably under high-pressure difference environments through the effective support of the self-expansion rubber cylinders; the length of each self-expansion rubber cylinder is reduced so that tools can enter successfully; the drift diameter is larger, the yield is higher after an oil and gas well is put into production, and the well is repaired conveniently; and the reliability is high and risks in the operation process are reduced.
Owner:PETROCHINA CO LTD
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