45 results about "Stress protection" patented technology

The invention discloses a digital non-electric-quantity protection method for an oil-immersed transformer based on pressure characteristics. The method comprises the following steps: firstly, when theoil-immersed transformer runs, acquiring a pressure instantaneous value P(t) at an installation position of a pressure sensor of the protected oil-immersed transformer in real time, and starting a pressure relay when the pressure instantaneous value P(t) is greater than a pressure relay starting threshold value Pst; secondly, adopting different action strategies according to the pressure instantaneous value P(t): when the pressure instantaneous value P(t) is greater than a protection action No. 2 threshold value Pth_2, determining that a serious fault occurs in the oil-immersed transformer, instantaneously performing pressure protection, and tripping off a circuit breaker; when the pressure instantaneous value P(t) is greater than a protection action No.1 threshold value Pth_1 and less than the protection action No.2 threshold value Pth_2, continuing to judge whether P(t+delta(t)) is still greater than the Pth_1 or not after time delay delta(t), determining that the fault is an internal fault if the requirement is met, performing the pressure protection and tripping off the circuit breaker; otherwise, performing no operation of the pressure protection. The method can effectively distinguish the internal fault and the external disturbance state of the transformer, and improves the pressure protection reliability.

A circuit for protection of a transceiver input includes an input transistor and a first resistor connected between the drain of the input transistor and an input node. A plurality of reverse-biased diodes connected between a supply voltage and the input node. An output node is connected to the source of the input transistor. A first forward-biased diode connected between the power supply and the plurality of reverse-biased transistors. A second forward-biased diode and a second resistor are connected between the first forward biased transistor and the gate of the input transistor. A pre-driver circuit includes first and second transistors forming a differential pair and driven by a differential input voltage. A third transistor is connected between sources of the first and second transistors and ground. First and second resistors are connected to drains of the first and second transistors, respectively. A fourth transistor is connected between a power supply voltage and the first and second resistors. Fifth and a sixth transistors are connected in series between the power supply voltage and the first and second resistors, wherein a node between the fifth and second transistors is connected to a gate of the fourth transistor.

One embodiment of the invention relates to a circuit for over-stress protection. The circuit includes a temperature rate sensor configured to monitor the temperature of a semiconductor device during a first state. The circuit is further configured to selectively switch the semiconductor device from the first state to a second state if the temperature increases at a rate that has a predetermined relationship with a temperature rate function. Other methods and systems are also disclosed.

MOS Transistors and bipolar junction transistors are connected to input pads and output pads for implementing electrostatic discharge protection. By conducting a power clamp circuit and applying a substrate-trigger technology, electrostatic discharge protection is further enhanced. For instance, positive ESD stress protection can be enhanced between signal pads (input pads and output pads) and VSS by using NMOS transistors and field oxide devices. Negative ESD stress protection can be enhanced between signal pads and VDD by using PMOS transistors.

A payload delivery unit for protecting and delivering a payload submerged in a submersion medium comprises a container including a pressure resistant shell and a resilient seal device. The shell defines a containment chamber and includes first and second shell members having opposed first and second sealing faces, respectively. The seal device engages and is interposed between the first and second sealing faces. The container is configured and constructed such that: when the submersion medium applies an exterior pressure to the first and second shell members such that a shell pressure differential, defined as the exterior pressure less an interior pressure of the containment chamber, exceeds a prescribed pressure, the first and second shell members compressively load and deform the seal device to effect a seal between the first and second shell members that prevents ingress of the submersion medium into the containment chamber; and when the shell pressure differential is less than the prescribed pressure, the seal device elastically rebounds to separate the first and second shell members to permit ingress of the submersion medium into the containment chamber.

A circuit for protection of a transceiver input includes an input transistor and a first resistor connected between the drain of the input transistor and an input node. A plurality of reverse-biased diodes connected between a supply voltage and the input node. An output node is connected to the source of the input transistor. A first forward-biased diode connected between the power supply and the plurality of reverse-biased transistors. A second forward-biased diode and a second resistor are connected between the first forward biased transistor and the gate of the input transistor. A pre-driver circuit includes first and second transistors forming a differential pair and driven by a differential input voltage. A third transistor is connected between sources of the first and second transistors and ground. First and second resistors are connected to drains of the first and second transistors, respectively. A fourth transistor is connected between a power supply voltage and the first and second resistors. Fifth and a sixth transistors are connected in series between the power supply voltage and the first and second resistors, wherein a node between the fifth and second transistors is connected to a gate of the fourth transistor.

Embodiments of the present invention provide a control method and terminal for a virtual reality device, wherein the method includes: if a display or playback task is currently being executed, acquiring a user's stress response parameter; wherein the stress response parameter is the The parameters generated by the user being stimulated by the virtual reality screen; determine whether to start the stress protection operation according to the stress response parameters; if it is necessary to start the stress protection operation, suspend the display or play task. The terminal in the embodiment of the present invention can automatically identify whether the user has a stress response, and when it is confirmed that the user has a stress response, stop the current display / play task, thereby improving the control efficiency.

A helicopter having a helicopter turbine engine disposed therein includes an over-stress protection system. The over-stress protection system includes a computer for storing data and an input such as a keyboard for inputting a safe temperature profile for starting the turbine engine. A temperature sensor is provided for measuring the actual turbine outlet temperature during the start up of the helicopter turbine engine. The actual engine temperature is then compared with the safe engine temperature profile and water and / or alcohol is injected into the engine when an actual temperature exceeds the safe temperature. The use of a ground based tank for use during start up and airborne tank for in flight use are also disclosed.

The invention discloses a semiconductor structure with a stress protection structure. The semiconductor structure includes a substrate, a stress generating element and a stress protection device. The substrate is provided with a first surface and a second surface which are in relative arrangement. The stress generating element is disposed in the substrate. The stress protection structure is disposed on a side of the first surface of the substrate, and surrounds the stress protection structure which is provided with a sealed air space inside. The invention also provides a forming method of the semiconductor structure with the stress protection structure.

A helicopter having a helicopter turbine engine disposed therein includes an over-stress protection system. The over-stress protection system includes a computer for storing data and an input such as a keyboard for inputting a safe temperature profile for starting the turbine engine. A temperature sensor is provided for measuring the actual turbine outlet temperature during the start up of the helicopter turbine engine. The actual engine temperature is then compared with the safe engine temperature profile and water and / or alcohol is injected into the engine when an actual temperature exceeds the safe temperature. The use of a ground based tank for use during start up and an airborne tank for in flight use are also disclosed.

The invention discloses a front damping spring for an automobile. The front damping spring comprises a spring body formed by coiling a spring steel wire. One end of the spring body is a large end part, and the other end of the spring body is a small end part, wherein the inner diameter of the small end part is smaller than that of the large end part after coiling. The large end part is sleeved with a first rubber sleeve, and the small end part is sleeved with a second rubber sleeve. The second rubber sleeve is provided with an opening groove which is formed in the extending direction of the spring body. The inner wall of the second rubber sleeve is evenly provided with a hot melt adhesive coating. The front damping spring has the following beneficial effects that the first rubber sleeve and the second rubber sleeve are arranged at the two ends of the spring body correspondingly so that stress protection can be achieved on the front damping spring, the two ends of the front damping spring are not likely to be abraded, and the pressure intensity during stress can be reduced; and due to the hot melt adhesive coating, good stripping strength can be achieved between the second rubber sleeve and the spring body.

The excessive intake of alcohol has the direct toxic effect on a target tissue, and also plays the role indirectly by different mechanisms, and even if the drinking is appropriate, hurts still accompany correspondingly. Therefore, the invention discloses a stress-protected special nutrient functional drink which is needed to be drunk before drinking and in the process of drinking specially and congenerous oral liquid thereof. The stress-protected special nutrient functional drink comprises the following main active ingredients: thiamine, riboflavin, L-ascorbic acid and the like or derivativesthereof, niacinamide, pyridoxine, inositol, vitamin B12 (VB12), vitamin E (VE), special functional amino acid, calcium ions and the like. The stress-protected special nutrient functional drink is accurate in proportioning, is supported mutually, has the synergistic effect, participates in conditioning and controlling the physiological and biochemical process of human bodies directly, makes organisms in the optimum stress protection preparation state of comprehensive antioxidation and the prevention and relieving of alcohol harms quickly, resists, prevents and / or relieves the generation and development of various alcohol harms caused by multiple mechanisms and multiple factors of alcohol, and promotes the health of the drinking comprehensively.

The invention provides a double-door escape door lock which comprises a lock groove, electromagnet, a touch switch, a strip-shaped door lever and a door lever mounting body, wherein one end of the strip-shaped door lever is articulated with the door lever mounting body, and the other end thereof is provided with an electromagnet absorbing plate; the electromagnet and the touch switch are respectively installed in the lock groove; an absorbing end of the electromagnet is arranged correspondingly to one side of the electromagnet absorbing plate; the touch switch is arranged correspondingly to one side of the electromagnet absorbing plate; the touch switch is connected in an electromagnet power supply circuit; the lock groove is internally provided with a stress protection clip which is provided with a concave-arc-shaped inner side wall; and the concave-arc-shaped inner side wall is arranged correspondingly to the strip-shaped door lever. The door lock has the advantages of simple structure, ingenious design, convenient use, firm locking, convenient and fast opening of a door, safety and reliability.

The invention discloses a high-reliability image sensor packaging structure with a stress protection structure and belongs to the field of image sensor packaging. The high-reliability image sensor packaging structure comprises a cover plate, a wafer, an image sensing area, welding discs, bonding glue, a passivation layer, a metal layer and a solder mask layer, a cavity structure is formed on the front of the cover plate, the wafer comprises a wafer front and a wafer back, both the image sensing area and the welding discs are distributed on the wafer front, the welding discs are distributed around the image sensing area and realize breakover, the bonding glue is positioned between the cover plate and the wafer and bonds the same together, and the passivation layer, the metal layer and the solder mask layer are sequentially formed on the back of the wafer. Breakover between the welding discs on the front of the wafer and solder balls on the back of the wafer is realized through a redistribution line layer formed by the above structure. Thickness of the packaging structure is lowered, stress in the metal layer is reduced, cutting process yield is increased, and packaging reliability is improved.

The invention provides a servo system control cable assembly, the three ends of the heat-shrinkable bifurcated cable are respectively connected to the control socket, and the heat-shrinkable bifurcated cable assembly is sequentially composed of high temperature wire, inner layer Heat-shrinkable tube, wave-proof sleeve and outer heat-shrinkable tube; Y-shaped molded shrink sleeves are sheathed outside the bifurcation of heat-shrinkable bifurcated cables; wave-proof sleeves are placed at each end of heat-shrinkable bifurcated cables And the outside of the control socket is covered with a straight mold shrink sleeve. The servo system control cable assembly described in the present invention not only has a reliable connection structure, but also has continuous shielding; the binding protection of the control cable bundle is realized through three layers of heat shrinkage protection, and the effectiveness and safety of the connection are guaranteed through the circumferential fastening of the titanium nickel ring. Continuity of shielding, tight stress protection at cable ends and bifurcations through straight and Y-shaped molded shrink sleeves.

The invention relates to the field of spoke production equipment, in particular to a spoke thread rolling machine. The spoke thread rolling machine mainly consists of a main motor, a first belt wheel, a main shaft, a differential mechanism, a feeding groove, a small motor, a sliding block, an aligning mechanism, a static tooth plate seat and a thread rolling plate, wherein the main shaft is horizontally arranged; the first belt wheel is connected with one end of the main shaft, and is connected with the main motor; the other end of the main shaft is connected with the sliding block; the thread rolling plate is arranged on the upper end surface of the sliding block; the feeding groove is arranged above the main shaft; one side of the feeding groove is connected with the small motor; the aligning mechanism is arranged on the other side of the feeding groove; the static tooth plate seat is arranged on the other side of the aligning mechanism. Through the adoption of the structure, the main shaft can be subjected to stress protection by utilization of a differential motor, so that the overall service life of the thread rolling machine can be prolonged; the position of a spoke to be subjected to thread rolling can be adjusted by utilization of the aligning mechanism, so that the position accuracy can be ensured, the quality of a thread rolling finished product can be improved, and the finished product yield can be improved.

The invention discloses a conveying device for luggage. The conveying device for the luggage comprises a locking screw plate, a partition plate, an uphill plate, a draw-bar box protection device, a connector, a conveying belt, a connecting shaft, a supporting plate and supporting columns, wherein the draw-bar box protection device is provided with a mechanical fixing device, a triggering startingdevice, a screw connecting device, a limiting device, an electromagnet device and a stress protection device. The conveying device for the luggage has the beneficial effects that through the arrangeddraw-bar box protection device, when a draw-bar box is conveyed by the conveying device, the draw-bar box is placed in the protection device to fix and limit the draw-bar box, and the damage caused byfriction between the surface of the draw-bar box and the conveying device is prevented; the stress protection device is arranged in the conveying device to limit a telescopic rod of the draw-bar box,the telescopic rod is prevented from lengthening during transportation, the transportation efficiency of the conveying device is improved, and the probability of draw-bar box damage is reduced.

The invention provides a probe protection structure for machine tool on-line measurement and a manufacturing method. The probe protection structure is a connection base for connecting a probe with a launching unit, and is characterized in that the connection base is a metal piece combined a cone with a cylinder; two radially-crossed arc-shaped grooves are arranged on the cylinder of the connectionbase; and the two identical arc-shaped grooves are mounted axially in a cross manner. The manufacturing method uses the tri-dimensional fictitious technology and finite element analysis software, andis characterized by a simple algorithm for calculation in a manufacturing process; the specific size of the cross-shaped probe structure can be calculated when setting according to the algorithm; calculation of structural sizes of different materials can be realized after specific parameters of the used material are substituted. The core of the design lies in the axially-crossed structure of thearc-shaped groove of which the groove size plays a decisive role in stress limits of the metal base. The quality standard of the structure can ensure that the strength of one-way stress ranks only second to the damaged limit of the probe rod, and provides stress protection for radial stress in two directions and axial stress in one direction, thus ensuring that the protection structure has elasticdistortion quantity of life upper limit, and is within the probe safety factor.

The invention provides a double-door escape door lock which comprises a lock groove, electromagnet, a touch switch, a strip-shaped door lever and a door lever mounting body, wherein one end of the strip-shaped door lever is articulated with the door lever mounting body, and the other end thereof is provided with an electromagnet absorbing plate; the electromagnet and the touch switch are respectively installed in the lock groove; an absorbing end of the electromagnet is arranged correspondingly to one side of the electromagnet absorbing plate; the touch switch is arranged correspondingly to one side of the electromagnet absorbing plate; the touch switch is connected in an electromagnet power supply circuit; the lock groove is internally provided with a stress protection clip which is provided with a concave-arc-shaped inner side wall; and the concave-arc-shaped inner side wall is arranged correspondingly to the strip-shaped door lever. The door lock has the advantages of simple structure, ingenious design, convenient use, firm locking, convenient and fast opening of a door, safety and reliability.

The invention relates to a preparation method of a medical Ti6Al4V artificial implant. The preparation method comprises the following steps of with Ti6Al4 alloy powder as a raw material, preparing theraw material into block-shaped Ti6Al4V alloy by an electron beam melting deposit method; and performing heat treatment on the block-shaped Ti6Al4V alloy to obtain the implant. The tensile strength achieves 960-990MPa, the yield strength can achieve 940-970MPa, the modulus of elasticity can achieve 30-40GPa and is close to the modulus of bones of human bodies, and the stress shielding and the stress protection are reduced.

The invention provides a pressure protection system for key equipment of a chemical engineering device. The pressure protection system comprises a safety PLC, an isolation circuit, an actuator, a pressure sensor, and an indication and operation panel. The pressure protection system can improve the automatic protection capacity of the key equipment at the moment of overpressure, and has the advantages of being high in reliability and small in investment and reducing workloads of workers, and false operation is little.

The embodiment of the invention discloses a pressure motion protection method of a breast X-ray machine. The method includes the steps that current pressure output by a drive mechanism of a drive pressure application device of the breast X-ray machine is collected; a current maximum pressure protection value corresponding to the current pressure is determined according to a mapping relation between the pressure and the maximum pressure protection value, wherein the current maximum pressure protection value is smaller than or equal to a final maximum pressure protection value; drive control parameters are calculated according to the current maximum pressure protection value; the drive mechanism is controlled to output pressure which is not larger than the current maximum pressure protection value according to the drive control parameters. The embodiment of the invention further discloses a pressure motion protection device of the breast X-ray machine and a breast X-ray machine system. By the adoption of the technical scheme, damage to detected patients can be reduced or avoided.

The invention provides dimming composite vacuum glass and a preparing method thereof. The glass comprises a glass layer including a first transparent conductive thick glass layer, a second transparent conductive thick glass layer and a third glass layer laminated from top to bottom; a polymer dispersion negative liquid crystal layer arranged between the first transparent conductive thick glass layer and the second transparent conductive thick glass layer; an infrared reflection layer arranged on the upper surface of the third glass layer; a stress protection layer arranged at the upper surface of the infrared reflection layer; a sealing layer coating around the glass layer along a direction vertical to the glass layer; a protection layer coating the outside of the sealing layer and a group of supporting objects uniformly arranged between the second glass layer and the stress protection layer. Characteristics of the vacuum glass and dimming glass can be effectively combined, and the antiexplosion and thermal insulation properties of the vacuum glass are enhanced.

The invention provides laminated explosion-proof vacuum heat-insulating glass and a preparation method of the laminated explosion-proof vacuum heat-insulating glass. The glass comprises glass layers, a laminated layer, an infrared reflection layer, a stress protection layer, a sealing layer, a protective layer and a set of supporters, wherein the glass layers sequentially comprise a first glass layer, a second glass layer and a third glass layer from top to bottom; the laminated layer is arranged between the first glass layer and the second glass layer; the infrared reflection layer is arranged on the upper surface of the third glass layer; the stress protection layer is arranged on the upper surface of the infrared reflection layer; the sealing layer is coated at one side of the glass layers along a direction vertical to the glass layers; the protective layer is coated at the outer side of the sealing layer; the set of supporters are uniformly arranged between the second glass layer and the stress protection layer. The laminated explosion-proof vacuum heat-insulating glass has the advantages that the heat insulation performance and explosion-proof performance of vacuum glass can be effectively enhanced.

The invention relates to an MEMS (Micro-Electro-Mechanical System) device, a manufacturing method thereof and an electronic device. The method comprises the following steps: S1, providing an MEMS wafer, wherein MEMS patterns are formed on a front side of the MEMS wafer; S2, forming an adhesive tape on the front side of the MEMS wafer in order to cover the MEMS patterns; and S3, reversing the MEMS wafer, arranging a stress protection layer on a back side of the MEMS wafer, and applying a pressure to the stress protection layer in order to bond the MEMS wafer and the adhesive tape. The manufacturing method has the advantages that 1, the wafer breakage probability is lowered, and the service life of a machine stand is prolonged; 2, the yield is increased, and the process cost is lowered; and 3, property insurance normal production is maintained, and the yield is increased.

The invention discloses a digital non-electric-quantity protection method for an oil-immersed transformer based on pressure characteristics. The method comprises the following steps: firstly, when theoil-immersed transformer runs, acquiring a pressure instantaneous value P(t) at an installation position of a pressure sensor of the protected oil-immersed transformer in real time, and starting a pressure relay when the pressure instantaneous value P(t) is greater than a pressure relay starting threshold value Pst; secondly, adopting different action strategies according to the pressure instantaneous value P(t): when the pressure instantaneous value P(t) is greater than a protection action No. 2 threshold value Pth_2, determining that a serious fault occurs in the oil-immersed transformer, instantaneously performing pressure protection, and tripping off a circuit breaker; when the pressure instantaneous value P(t) is greater than a protection action No.1 threshold value Pth_1 and less than the protection action No.2 threshold value Pth_2, continuing to judge whether P(t+delta(t)) is still greater than the Pth_1 or not after time delay delta(t), determining that the fault is an internal fault if the requirement is met, performing the pressure protection and tripping off the circuit breaker; otherwise, performing no operation of the pressure protection. The method can effectively distinguish the internal fault and the external disturbance state of the transformer, and improves the pressure protection reliability.