49results about How to "Avoid the risk of breaking" patented technology

The invention discloses a 20W3dB attenuating piece of an aluminium nitride ceramic substrate, comprising a 5*5*1mm aluminium nitride substrate, wherein a back conducting layer is printed on the back surface of the aluminium nitride substrate; wires and resistors are printed on the front surface of the aluminium nitride substrate; the wires are connected with the resistors to form an attenuation circuit which is symmetrical along the central line of the aluminium nitride substrate; the output end and the input end of the attenuation circuit are respectively connected with a bonding pad; and the two bonding pads are symmetrical along the central line of the aluminium nitride substrate. In the attenuating piece, the resistance area is enlarged, so that the high-low temperature impact resistance is enhanced, the quenching damage of high temperature to the resistors is avoided when the output end is welded with a lead, the risk of breaking down in the actual use process due to quenching damage of the resistors is avoided, the performance of the attenuating piece is greatly improved, the situation that the original attenuating piece only can be applied in low frequency is broken, and further the attenuating piece can be applied in 2G-3G networks.

The invention discloses a high-power aluminum nitride ceramic substrate 100W-20dB attenuator, which comprises an aluminum nitride substrate, a conductive layer is printed on the back of the aluminum nitride substrate, and several resistors and silver are printed on the front of the aluminum nitride substrate. Paste wire, the silver paste wire is connected to the resistor to form an attenuation circuit, and the glass protective film is printed on the resistor. The high-power aluminum nitride ceramic substrate 100W-20dB attenuator increases the resistance area, increases the high and low temperature impact resistance of the attenuator, and makes the product performance index meet the requirements. At the same time, it avoids the high temperature resistance quenching when welding the lead wire at the output end, avoids the risk of damage due to resistance quenching during actual use, and improves the circuit design so that the product can be applied to 3G networks.

A self-resetting piezoelectric semi-active friction damper comprises a shell and sleeves, wherein the shell comprises a top cover and a small box. One end of each sleeve is arranged on a base at the bottom of the small box, the other end of each sleeve is arranged on a top seat below the bottom of the top cover, a certain gap is reserved between the top seat and the other end of the corresponding sleeve, piezoelectric ceramic drivers are placed in the sleeves, leads of the piezoelectric ceramic drivers extend out of the damper through small grooves in the side faces of the sleeves and long and narrow hole grooves in the side walls of the small box and are connected with an external power supply, gaskets are arranged at two ends of each piezoelectric ceramic driver, a baffle is fixed to one side wall of the small box through a fixing screw, pre-pressure is applied by pre-tightening screws on the top cover, a balancing pull rod penetrates the baffle and is connected with the outer wall of the left sleeve, a connecting pull rod is fixed to the left side wall of the small box through a hexagonal nut, an actuating pull rod penetrates one side wall of the small box and is connected with the right sleeve, and reset springs are arranged on the balancing pull rod and the actuating pull rod respectively. A control system of the self-resetting piezoelectric semi-active friction damper is simple, the performance of the piezoelectric ceramic drivers is stable, the pre-pressure is conveniently applied, output energy is less, power output is high, and a piston can automatically reset.

The invention discloses an elevator traveling cable protection device which comprises a diversion sheave assembly. The diversion sheave assembly can move up and down along a vertical guide piece. Through vertical movement of an elevator counterweight, the diversion sheave assembly and the lower portion of an elevator traveling cable move synchronously. An idler wheel guide mechanism for traveling cable protection is fixedly connected with the diversion sheave assembly. The elevator traveling cable penetrates the idler wheel guide mechanism for traveling cable protection to prevent the elevator traveling cable from swinging in the movement process of an elevator. According to the elevator traveling cable protection device, a fixing device is additionally arranged on the lower portion of the traveling cable, tension is provided for the traveling cable, the problems of vibration and swing of the traveling cable in the operation process of the elevator can be solved effectively and fundamentally, and collision with a shaft component of the traveling cable in the movement process is avoided, so that the risk that a traveling cable is snapped in the operation process of the elevator is avoided, the service life of the traveling cable is improved, and stable operation of the elevator is guaranteed.

The invention discloses a cleaning process for a high-density interconnected printed circuit board (HDI PCB). The process comprises the following steps of: cleaning with clean water at normal temperature under high pressure; cleaning with ultrasonic waves; cleaning with clean water at normal temperature under low pressure; cleaning with micro etching fluid; cleaning with clean water at normal temperature under low pressure; cleaning with dilute sulphuric acid; cleaning with clean water at normal temperature under low pressure; performing natural wind drying at normal temperature under high pressure; roasting and the like. By the process, a blind hole cleaning effect is ensured, the production efficiency and the turnover rate are improved, board surface scratching scrap in the transporting process is effectively reduced, and risks of wedge voids are avoided, so that the production cost is saved.

The invention discloses a 100w 20dB attenuating plate with a large pad for an aluminum nitride ceramic substrate. The attenuating plate comprises an aluminum nitride substrate, wherein the back surface of the aluminum nitride substrate is printed with a conductor layer while the front surface of the aluminum nitride substrate is printed with a plurality of resistors and a silver paste wire, wherein the silver paste wire is connected with the resistors so as to form an attenuating circuit; and a glass protection film is printed on the resistors. The resistor area of the 100w 20dB attenuating plate with the large pad for the aluminum nitride ceramic substrate is increased, so that the property in resisting high-low temperature impact is enhanced and the performance index of the product is qualified; the attenuating plate has higher welding property and stronger welding strength than the current 100w 20dB attenuating plates in the market, due to the large pad design. Meanwhile, the resistors are protected from quenching injury of high temperature when the leads are welded on the output end, so as to avoid the risk that the resistors injured by quenching are likely to break in the practical use; the circuit design is improved and the product can be applied to 3G (third-generation) networks.

The invention discloses a pneumatic vertical line pressing device and a line pressing method thereof. The pneumatic vertical line pressing device comprises an upper module, a lower module and a base, wherein the lower module is fixed on the base; a bracket is arranged at one side of the lower module; the upper module is movably fixed on the bracket; the lower module is just located at the upper end of the upper module; and the base is also provided with a master controller. First guide grooves are formed in the lower module; and second lead wire grooves are formed in the upper module, so that the direction of a to-be-pressed line can be well controlled; and the risk that a copper wire in the to-be-pressed line is snapped off during operation employing tweezers is avoided. Meanwhile, the lower module is arranged at the lower end of the upper module, namely the lower module and the upper module are in a 90-degree up-and-down vertical operation manner; and an alarm module is arranged, so that the risks that a hand of an operator is crushed and the to-be-pressed line is crushed when pressed into a wire clamp since the upper module and an air cylinder touch a switch during the operation of the operator are avoided. Meanwhile, a time delay module is arranged, so that the condition that the line is pulled up when the upper module and the lower module of a jig move too fast is avoided.

The invention relates to a sand-in-water coating and a preparation method thereof. Raw materials of the sand-in-water coating comprise a dispersion phase and a continuous phase; the dispersion phase involves, by weight, 0.5%-1% of first protection glue powder, 20%-30% of a pure acrylic emulsion, 0.4%-0.7% of hollow microspheres, 0.1%-0.5% of a first alkali swelling thickening agent, 25%-35% of quartz sand, 3%-10% of a first assistant and 25%-40% of water; the continuous phase involves, by weight, 2%-4% of second protection glue powder, 30%-50% of a silicone acrylic emulsion, 0.3%-0.6% of a second alkali swelling thickening agent, 3%-10% of a second assistant and 50%-65% of water; the proportion of the dispersion phase is 1 g / ml-1.06 g / ml; the viscosity of the continuous phase is 40 ku-55 ku. The sand-in-water coating prepared by adopting the two-phase system is low in proportion of the dispersion phase, in the processes of prilling production, mixing and storage of finished products, color points are in a suspension state, and the sedimentation phenomenon cannot easily occur. The viscosity of the coating is low, the color point separation effect is good, the production efficiency is high, the water-whitening resistance performance of the coating is good, and the viscosity is stable.

The invention discloses a 20W1dB attenuating piece of an aluminium nitride ceramic substrate, comprising a 5*5*1mm aluminium nitride substrate, wherein a back conducting layer is printed on the back surface of the aluminium nitride substrate; wires and resistors are printed on the front surface of the aluminium nitride substrate; the wires are connected with the resistors to form an attenuation circuit which is symmetrical along the central line of the aluminium nitride substrate; the output end and the input end of the attenuation circuit are respectively connected with a bonding pad; and the two bonding pads are symmetrical along the central line of the aluminium nitride substrate. In the attenuating piece, the resistance area is enlarged, so that the high-low temperature impact resistance is enhanced, the quenching damage of high temperature to the resistors is avoided when the output end is welded with a lead, the risk of breaking down in the actual use process due to quenching damage of the resistors is avoided, the performance of the attenuating piece is greatly improved, the situation that the original attenuating piece only can be applied in low frequency is broken, and further the attenuating piece can be applied in 2G-3G networks.

The invention discloses a large-power 100 W-9 dB attenuation sheet with an aluminum nitride ceramic substrate. The sheet comprises an aluminum nitride substrate, wherein a conductor layer is printed at the back side of the aluminum nitride substrate; a plurality of resistors and silver paste lead wires are printed at the front side of the aluminum nitride substrate; the silver paste lead wires are connected with the resistors to form an attenuation circuit; and glass protective films are printed on the resistors. The needed attenuation value is obtained by changing the size of resistance value and surface resistivity in the attenuation circuit and good stationary wave properties can be obtained through the design of the lead wires. According to the large-power 100 W-9 dB attenuation sheet with the aluminum nitride ceramic substrate provided by the invention, the area of the resistors is enlarged, the high and low temperature impact resistance of the attenuation sheet is increased and the performance indexes of products meet the requirements. Meanwhile, the quenching damages to the resistors at a high temperature when an output end is welded with the lead wires are avoided, the risk of damaging the resistors in the actual use process due to quenching the resistors is avoided, the design of the circuit is improved, the attenuation precision reaches 9+ / -0.8 dB within 3 G (Gigabyte) and the standing wave satisfies the market demand, so that the products can be applied to 3G (The 3rd Generation Telecommunication) networks.

The invention discloses a high-density hollow micro-needle array based on negative photoresist and a manufacturing technology thereof, and belongs to the technical fields of medical cosmetic instruments and micro-needles for medical administration. The micro-needle array can be applied to painless, safe and efficient transdermal delivery. The micro-needle array is formed by combining a large quantity of single micro-needles, and the density can reach 8000 to 10000 single micro-needles per square centimeter. Each single micro-needle comprises a hollow channel for liquid to pass, at least one needle body arranged on the side surface of the hollow channel and used for enabling liquid to flow out, and a solid syringe needle positioned at the top end of the hollow channel. The invention discloses a tensile photoetching setting technology through the sensitive property and the viscidity of the negative photoresist, that is, the syringe needle is manufactured at the top end of the needle body in a tensile manner after the manufacture of the needle body. Compared with the prior art, the micro-needle array and the manufacturing technology thereof have the advantages of high density, low cost and high easiness in large-scale production.

The invention provides a spring clamp mechanism capable of adjusting and controlling unlocking force and used for the safe separation between an aircraft and a catapult carrier during the catapult-assisted take-off process of an unmanned aerial vehicle (UAV). The spring clamp mechanism comprises adjustment cushion blocks, torsion springs, an outer clamping plate, an inner clamping plate, a fixingshaft and a clamping rod, wherein the clamping rod is provided with an overload breaking groove; and the parts that the clamping rod is in contact with the inner clamping plate and the outer clampingplate are provided with tangent arc surfaces. The spring clamp mechanism has the advantages that positive pressure and frictional force between clamping contact surfaces are controlled by the pre-compression deformation of the torsion springs, and that the aircraft is separated from the carrier when forward thrust of propellers overcomes the component in the thrust direction of resultant force ofthe positive pressure and the frictional force between the clamping contact surfaces. The pre-compression deformation is adjusted through the cushion blocks so that the unlocking force is adjustable and controllable, and after overloading, the clamping rod can break automatically to achieve the effect of safe and reliable separation between the aircraft and the carrier.

The invention discloses a rapid inserting connector for a pneumatic brake pipeline. The rapid inserting connector comprises a positive connector and a hollow bolt assembly, wherein the positive connector and the hollow bolt assembly are mutually connected in an inserted manner. The positive connector comprises a positive connector body, a first sealing ring and a second sealing ring. The hollow bolt assembly comprises a hollow bolt body, a clamp and a third sealing ring. The interior of the hollow bolt body is connected with the rapid inserting end of the positive connector in an inserted manner, and fixedly clamped through the clamp. According to the rapid inserting connector, the positive connector is connected with a nylon pipe, the hollow bolt assembly is connected with an EBS valve, then the positive connector and the hollow bolt assembly are connected in an inserted manner, thus the connecting structure of the EBS valve in a commercial pneumatic brake system is simple, the occupied space is small, connecting is convenient and reliable, and the rapid inserting connector is easy to disassemble.

The invention discloses a tower type solar reflecting mirror which comprises a glass substrate, a reflecting layer, a transition layer, a protecting layer and an anti-ultraviolet protecting membrane in contact in sequence, wherein the anti-ultraviolet protecting membrane is an internal structure of a plurality of areas with relatively high refractive indexes in areas with relatively low refractive indexes inside the anti-ultraviolet protecting membrane; the anti-ultraviolet protecting membrane is bent from a middle point of the thickness of the membrane in the areas with the relatively high refractive indexes. According to the tower type solar reflecting mirror disclosed by the invention, the reflecting layer and the transition layer are sequentially plated on the surface of the glass substrate by using a vacuum magnetron sputtering method, so that the adhesion property of interfaces is improved, and the durability of the reflecting membrane is improved; due to addition of the protecting membrane with a light diffusion function, the reflection efficiency of the reflecting mirror is improved, and the reflecting mirror is good in aging resistance and ultraviolet resistance.

The invention discloses a high-power attenuator (100W-10dB) using an aluminum nitride ceramic substrate. The attenuator comprises the aluminum nitride substrate, wherein, a conductor layer is printed on the rear face of the aluminum nitride substrate; and a plurality of resistors and silver paste leads are printed on the front face of the aluminum nitride substrate and are connected together to form an attenuation circuit, and glass protective films are printed on the resistors. The high-power attenuator (100W-10dB) using the aluminum nitride ceramic substrate has the advantages that the area of the resistors is increased so as to enhance the high-low temperature impact resistance of the attenuator and meet the requirements for performance indexes of the product; and meanwhile quenching damage on the resistors due to high temperature can be avoided during the process of welding the leads on an output end, the risk that the damaged resistors are broken can be prevented during the actual application process, and the circuit design is improved so that the attenuation precision can reach 10 plus or minus 1dB within the frequency band of 3G and standing wave can meet the market requirement, thus the product can be applied to a 3G (the 3rd generation) network.

The invention discloses a 200W 30dB attenuation sheet of a high-power aluminum nitride ceramic substrate, which comprises an aluminum nitride substrate with the specification of 9.55mmX9.55mmX1mm. A back guide layer is printed on the back of the aluminum nitride substrate, leads and resistors are printed on the front side of the aluminum nitride substrate, and the leads are connected with the resistors to form an attenuating circuit. The area of each resistor is increased by the aid of the attenuation sheet, so that the high temperature and low temperature resistance and impact resistance thereof are enhanced, quenching to the resistors caused by the high temperature is avoided when the leads are welded at an output end, and risk of failure of the resistors during actual use caused by quenching of the resistors is reduced simultaneously. By the aid of the optimized design of the circuit, the performance of the attenuation sheet is improved, required attenuation values can be obtained by accurately controlling the surface resistivity to control the resistance value of each resistor, and the gap in domestic production of 200W 30dB attenuation sheets of aluminum nitride substrates is filled.

The invention discloses a 30-watt 18dB attenuator for an aluminum nitride ceramic substrate. The 30-watt 18dB attenuator comprises an aluminum ceramic substrate, wherein a conductor layer is printed on a back side of the aluminum nitride ceramic substrate; a plurality of resistors and a silver paste lead are printed on a front side of the aluminum nitride substrate; the resistors are connected through the silver paste lead to form an attenuation circuit; and a glass protecting film is printed on the resistors. According to the high-power 30-watt 18dB attenuator for the aluminum nitride ceramic substrate, due to the increase of the areas of the resistors, the performance of the attenuator for resisting high-low-temperature impact is enhanced and the performance index of products meets the requirement. Meanwhile, the quenching to the resistors caused by high temperature during lead welding at an output end is avoided, the risk that the resistors are damaged in the actual use process due to quenching is avoided, the design of the circuit is improved, the attenuation precision reaches 18+ / -1dB within 3G (3rd Generation), standing waves meet the market requirement and further the 30-watt 18dB attenuator can be applied to a 3G network.

The invention discloses a 20W 20dB attenuation sheet of a high-power aluminum nitride ceramic substrate, which comprises a 5*5*1mm aluminum nitride substrate, wherein a back conduction layer is printed on the back surface of the aluminum nitride substrate, a resistor and a lead are printed on the front face of the aluminum nitride substrate, the lead is connected with the resistor to form an attenuation circuit, the attenuation circuit is symmetrical along the center line of the aluminum nitride substrate, the output end and the input end of the attenuation circuit are respectively connected with a welding pad, and the two welding pads are symmetrical along the center line of the aluminum nitride substrate. According to the attenuation sheet, the resistor area is increased to ensure that high-low-temperature impact resistance property is improved, quenching to the resistor at high temperature when a lead is welded at the output end is avoided, the risk of the damaged attenuation sheet due to the quenched resistor in an actual use process is avoided so that the performance of the attenuation sheet is greatly improved, and the situation that the traditional attenuation sheet can be only applied to low frequency occasions is eliminated so that the attenuation sheet can be applied to 2G-3G networks.

The invention provides a wing protection mechanism for planting and protecting unmanned aerial vehicles. The mechanism comprises a main box, wherein a medicine box is detachably installed at the bottom of the main box, a plurality of hollow cavities are arranged at the bottom of the medicine box, each hollow cavity is provided with a storage battery, the storage battery is connected with an unmanned aerial vehicle controller through a power connector to provide electric energy, and the unmanned aerial vehicle controller is installed in the inside of the main box; the bottom of the medicine boxis connected with the medicine spraying device through a medicine outlet pipe; four diagonal positions of the main box are provided with organic arms, the ends of the arms are provided with motors, and the top of the motors is provided with propeller blades. The end of the arm is provided with a wing protection mechanism. The protection device can protect the blades of the unmanned aerial vehicle(UAV), thereby effectively preventing the risk of broken propeller blades caused by the UAV in the process of falling, and reducing the maintenance cost.

The invention discloses a 1-watt 8dB attenuation piece for an aluminum oxide ceramic substrate. The 1-watt 8dB attenuation piece comprises an aluminum oxide ceramic substrate with a size of 2*3.5*0.63mm, wherein the back surface of the aluminum oxide substrate is printed with a back conductive layer, the front surface of the aluminum oxide substrate is printed with a conducting wire and a resistor, and the conducting wire is connected with the resistor, so that an attenuation circuit is formed, the attenuation circuit is symmetrical along the centre line of the aluminum oxide substrate, an output end and an input end of the attenuation circuit are respectively connected with a welding disc, and the two welding discs are symmetrical along the centre line of the aluminum oxide substrate. A required attenuation value can be obtained by changing the size dimension and the surface resistivity of the resistance in the attenuation circuit, and the relatively good stationary wave characteristic can be obtained according to the design of the conducting wire. According to the attenuation piece, the resistance area can be enlarged, so that the high-temperature and low-temperature impact resistance of the attenuation piece can be enhanced, the quenching damage of the high temperature to the resistor when the output end is welded with a lead can be avoided, and the risk that the resistor is damaged during practical use caused by the quenching damage of the resistor can be avoided, so that the performance of the attenuation piece can be greatly improved, and the situation that the original attenuation piece is only applied to the low fluency condition can be broken, and therefore, the attenuation piece is applicable to a 2G-3G network.

The invention belongs to the technical field of medical equipment, particularly relates to a medical vascular disease detection kit, and aims to solve the problems that an existing vascular disease detection device is large and inconvenient to carry, and people in villages and towns cannot be detected easily. According to the technical scheme, the medical vascular disease detection kit comprises adetection kit body and is characterized in that rubber pads are connected to the outer walls of the four corners at the bottom of the detection kit body through bolts, a vertically arranged cold storage box is connected to the outer wall of the bottom of one side of the detection kit body through bolts, and a semiconductor refrigerating plate is connected to the inner wall of the center of the bottom of the cold storage box through bolts. The medical vascular disease detection kit has the advantages that the medical vascular disease detection kit is provided with the cold storage box, the semiconductor refrigerating plate is arranged at the bottom of the cold storage box, repeated detection may be needed during vascular disease detection, sampled blood can be stored in the cold storage box, later repeated blood sampling is avoided, convenience is achieved, and blood samples can be effectively stored.

The invention discloses a 20W and 9dB attenuator with an aluminium nitride ceramic baseplate. The attenuator comprises a 5*5*1mm aluminium nitride baseplate, wherein a back guide layer is printed at the back of the aluminium nitride baseplate; a wire and a resistor are printed on the front face of the aluminium nitride baseplate; the wire is connected with the resistor to form an attenuation circuit which is symmetrical relative to the central line of the aluminium nitride baseplate; and an output end and an input end of the attenuation circuit are respectively connected with a bonding pad, and the two bonding pads are symmetrical relative to the central line of the aluminium nitride baseplate. As the resistor area is enlarged, the high and low temperature impact resisting property of the attenuator is enhanced, thereby avoiding the hardening of the resistor caused by high temperature when a lead is welded at the output end, and then avoiding the risk of damage in practical use arising from the hardening of the resistor, therefore the property of the attenuator is greatly improved, the situation that attenuators in the prior art are only applicable to low frequency is changed and thus the attenuator can be used in 2G-3G (second generation-third generation) networks.

The invention discloses a self-propelled orchard picking robot, and belongs to the technical field of agricultural robots, the self-propelled orchard picking robot comprises a walking chassis, and a manipulator auxiliary moving platform and a fruit conveying mechanism which are opposite are fixedly arranged at the top of the walking chassis; the mechanical arm auxiliary moving platform comprises an X-axis sliding frame, a first Y-axis sliding frame and a Z-axis sliding frame which are sequentially connected, the Z-axis sliding frame is connected with a second Y-axis sliding frame, and a mechanical arm is fixedly arranged at the end of the second Y-axis sliding frame. The fruit conveying mechanism comprises a telescopic pipe assembly, and the telescopic pipe assembly can stretch out, draw back and move so as to be kept below the mechanical arm all the time.

The invention discloses a 30W and 20dB attenuator with an aluminium nitride ceramic baseplate. The attenuator comprises a 5*5*1mm aluminium nitride baseplate, wherein a rear-of-conductor layer is printed at the back of the aluminium nitride baseplate; a wire and a resistor are printed on the front face of the aluminium nitride baseplate; and the wire is connected with the resistor to form an attenuation circuit which is symmetrical relative to the central line of the aluminium nitride baseplate, the output end and input end of the attenuation circuit are respectively connected with a bonding pad, and the two bonding pads are symmetrical relative to the central line of the aluminium nitride baseplate. By way of changing the size and surface resistivity of the resistor in the attenuation circuit, a required attenuation value can be obtained; and by means of design of the wire, better standing wave feature can be achieved. As the resistor area is enlarged, high and low temperature impact resisting property of the attenuator is enhanced, thereby avoiding hardening of the resistor caused by high temperature when a lead is welded at the output end, and then avoiding the risk of damage in practical use arising from the hardening of the resistor, therefore the property of the attenuator is greatly improved, which changes the situation that attenuators in the prior art are only applicable to low frequency, and ensures that the attenuator disclosed by the invention can be used in 2G-3G (second generation-third generation) networks.

The invention discloses a reusable assembly type exhibition appliance in the technical field of exhibition appliance manufacturing, the reusable assembly type exhibition appliance comprises an assembly type exhibition stand, a crystal ball, a clamp and a console, the clamp is clamped on the side wall of the assembly type exhibition stand, the console is fixedly connected to the outer side of the assembly type exhibition stand, and the crystal ball is clamped on the clamp; the clamp is used for clamping a crystal ball and can rotate the crystal ball, and the console is used for controlling the clamp to drive the crystal ball to rotate; according to the crystal ball display device, the crystal balls can be completely displayed under the condition that the crystal balls are prevented from being in direct contact with viewers in the display process, so that the safety of the crystal balls is guaranteed, and the crystal balls are fully displayed.