18 results about "Passive resistance" patented technology

The invention provides a front load simulation device and simulation method of a shield tunneling test prototype, and relates to the technical field of shield tunneling. The counter-force plate is fixedly connected to one side of the counter-force frame; the shield shell is arranged in the counter-force frame, and one end of the shield shell is hinged to the other side of the counter-force frame; the at least one hydraulic driving mechanism is fixedly connected to the counter-force plate, and one end of the hydraulic driving mechanism penetrates through the counter-force plate and is in separable contact with the end face of the other end of the shield shell; the hydraulic control system is communicated with each hydraulic driving mechanism in the at least one hydraulic driving mechanism, and the hydraulic control system controls the driving mechanisms to apply different passive resistances to the end face of the other end of the shield shell so as to simulate different front loads borne by the shield tunneling in different stratums. The front load simulation device provided by the invention can accurately simulate front loads with different sizes, so that simulation of different stratum conditions is realized, and the requirements of different test working conditions are met.

The invention discloses a SiC MOSFET device junction temperature real-time online monitoring method and system based on an on-resistance. The monitoring system comprises a passive resistance network unit, a signal operation unit and a state protection unit. The passive resistance network unit is used for generating an electrical parameter representing a conduction electrical parameter of the SiC MOSFET device; the signal operation unit is used for operating the electrical parameters of the passive resistance network unit and outputting on-resistance, on-current and on-voltage output signals of the SiC MOSFET device; after the on-resistance is obtained, the real-time junction temperature of the SiC MOSFET device chip can be determined according to the corresponding relation between the on-resistance and the junction temperature. And the state protection unit is used for protecting the source resistance network unit and the signal operation unit when the SiC MOSFET device is turned off. The monitoring system extracts the on resistance on line in real time to monitor the junction temperature, and has the characteristics of simple structure and high monitoring precision. And meanwhile, the device has the characteristics of no invasion and real-time online monitoring, and real-time online monitoring of the junction temperature of the device is realized under the condition that the SiC MOSFET device is not disassembled.

The invention relates to the technical field of mining production, in particular to a supporting method used when a tunneling roadway passes through a fracture crushed zone of a water diversion fault, and aims to solve the problems that when the tunneling roadway passes through the fracture crushed zone of the fault at present, due to the fact that the traditional supporting mode of the roadway is single, roadway roof fall and wall caving safety accidents are extremely likely to happen. According to the method, aiming at complex geological characteristics of a river bed and fault intersection area, a combined process of steel arch advanced shape control and concrete arch permanent shape fixation is selected, material mechanics, rock and soil mechanics and engineering construction principles are combined, the integrity of broken rock mass is improved through grouting, and through the synergistic effect of steel arch advanced support and concrete arch support, the shape of the broken rock mass is effectively improved. The stable control of the surrounding rock of the tunneling roadway is realized, the sequential connection of temporary support and permanent support, the overall stress of the steel arch and the rigid bearing of concrete are ensured, an active constraint-passive resistance support body is formed, and the situation that a single support mode is difficult to deal with the surrounding rock instability risk is effectively avoided.

The application provides a design method of a soil-rock combined foundation pit hanging foot pile supporting structure, the hanging foot pile supporting structure comprises a supporting pile and a reserved rock shoulder in a pit, and the design method comprises the following steps: a semi-infinite rock mass and an actual finite rock mass model are established by means of finite element software, a uniform load is applied to the rock mass model, the horizontal resistance coefficient of the rock mass is calculated and the reduction coefficient of the finite rock mass is obtained by comparison, and the reduction coefficient is substituted into a specification method to calculate the horizontal resistance coefficient of the finite rock mass in design; the supporting pile displacement, passive resistance safety factor, anti-overturning and anti-sliding checking are completed by using Lizheng deep foundation pit software, the suitable rock-embedded depth is determined, the pile reinforcement is determined according to the shear force and the bending moment calculated by the software; and the shear resistance and tensile resistance bearing capacity of the reserved rock shoulder in front of the pile are checked, and the rock shoulder width is determined. The passive resistance effect of the reserved rock shoulder in front of the pile is fully considered, the rock-embedded depth of the supporting pile can be effectively shortened, the supporting cost is saved, and certain economic benefits are obtained.

The resistance converter has inputs for passive resistors. The converter allows the conversion of one standardized passive resistance characteristic curve to another standardized resistance characteristic curve. The output emulates a corresponding ohmic resistance.

This utility model relates to the field of foundation engineering technology, specifically a PSB precision-rolled threaded steel anti-buoyancy anchor structure, including a hollow threaded steel anchor. Guide grooves are formed around the lower part of the hollow threaded steel anchor. A pressure rod is slidably engaged in the center of each guide groove. Guide rods are fixedly installed around the center of each pressure rod. A base plate is fixedly installed at the lower center of the pressure rod. Placement grooves are formed around the center of each base plate. Connecting rods are rotatably connected above and below the center of multiple placement grooves. One end of each set of connecting rods is rotatably connected to a protruding plate. This utility model solves the problems of traditional anchors, which are usually straight rod structures, relying on the adhesion between the rod body and the grouting body and passive resistance at the ends for anchoring. This results in a single anchoring method and many shortcomings in practical use.

The invention discloses a leg physical therapy device for orthopedic postoperative rehabilitation, and belongs to the technical field of medical instruments. The leg physical therapy device for orthopedic postoperative rehabilitation comprises a leg sheath, a bending traction mechanism and a shank internal rotation mechanism, the bending traction mechanism is arranged on the leg sheath, and the shank internal rotation mechanism is arranged on the bending traction mechanism. Active traction force and passive resistance are applied to leg training of patients through the bending traction mechanism to assist the patients in different rehabilitation stages in leg training, the shank inward rotation mechanism fits the structure of the human body during leg bending training, small-amplitude inward rotation traction force and patella movement traction force are generated, the patients are helped to be trained more comfortably and more correctly, and the rehabilitation effect of the patients is improved. According to the leg rehabilitation training device for the orthopedics department, the problems that in the prior art, an existing leg rehabilitation training device for the orthopedics department is single in function and poor in rehabilitation training effect can be solved, the patient is helped to better complete rehabilitation training, and the rehabilitation training effect is improved.

The present application relates to a kind of composite biological temperature-regulating anti-freezing concrete of phase change microcapsule and its preparation method, and it is related to building material technical field.The concrete includes the following components: cement 20-60 parts, water 10-40 parts, fine aggregate 60-100 parts, coarse aggregate 80-120 parts, water reducing agent 0.1-0.4 parts, biological phase change microcapsule 1.5-2.5 parts, wherein, the phase change temperature of biological phase change microcapsule is 0-10 DEG C.By introducing the biological phase change microcapsule with phase change temperature near freezing point, when the ambient temperature of concrete crosses 0 DEG C, it can actively absorb or release a large amount of latent heat through the solid-liquid phase change of core material, actively adjust the internal temperature through phase change latent heat, change traditional passive resistance to active intervention, effectively buffer and delay the temperature rising and falling speed in the interior of concrete, significantly reduce the temperature stress peak in freeze-thaw cycle process, weaken freeze injury from power source.

The invention relates to the technical field of automobile parts, in particular to an automobile emergency starting power supply with a protective structure, which comprises a power supply body, a female joint is arranged on the power supply body, a male joint is inserted into the female joint, a nut is sleeved on the male joint, a limiting ring is fixedly connected to the tail part of the male joint, and a protective cover is arranged on the limiting ring. A limiting face is arranged on the inner side of the head portion of the nut, an internal thread is arranged on the inner side of the nut, and an external thread matched with the internal thread is arranged on the female connector. A magnetic attraction-torsional spring-tooth meshing composite anti-loosening mechanism is innovatively adopted, intelligent response to a vibration environment is achieved, silence is kept under low-frequency micro-vibration, and fatigue caused by invalid actions is avoided; locking is automatically triggered under high-frequency strong vibration, the connection reliability is reversely enhanced through vibration energy, the limitation of a traditional passive resistance type anti-loosening mode is broken through, and the anti-loosening device is particularly suitable for the specific working conditions of high-frequency electromagnetic vibration and transient torque impact of the electric vehicle.

The invention discloses a unified hybrid circuit based on two-dimensional isolation and an asymmetric transceiver system, and belongs to the technical field of high-speed analog integrated circuits. The unified hybrid circuit is a passive resistance network topology shared by a forward channel and a reverse channel, and a two-dimensional isolation mechanism is constructed through asymmetric parameter configuration. The mechanism comprises the following steps: in an amplitude domain, configuring a high output signal swing for the FC, and configuring an ultralow output signal swing for the BC to form high-strength passive isolation; in the frequency domain, separation is realized by using the frequency spectrum difference between the FC high data rate signal and the BC low data rate signal. The FC receiver of the transceiver system only needs the equalizer to focus on compensating the channel loss; and the BC receiver filters high-frequency residues through a simple low-pass filter. Echo interference in asymmetric SBD communication is efficiently restrained from the source, the system performance and the integration degree are remarkably improved through a low-complexity and low-power-consumption framework, and the method is suitable for high-speed interconnection scenes such as the vehicle-mounted Ethernet.

The utility model belongs to the field of lung function exercise, disclose a kind of lung function exercise appliance, comprising: straight tube, lifting plate and self-locking assembly.The inside of straight tube is slidably provided with hollow plate, and the top of the hollow plate, slidingly set with lifting plate, and the sidewall of the straight tube is provided with guide slot, and the moving path of the lifting plate is same with the path of guide slot;Self-locking assembly is arranged at the both sides of the lifting plate and the guide slot, for keeping the lifting plate at the highest point of displacement, effectively realize the function that lifting plate position is automatically, passive adjustment training resistance intensity with the change of patient's exhale strength, this passive resistance adjustment mechanism based on exhale strength drive, without user exerting any additional manual operation, can ensure that training resistance real-time match the actual lung function ability of patient currently, without electronic sensor and algorithm control, significantly improve the convenience and safety of operation of elderly patient.

The application relates to the battery technical field and provides a battery pack, a vehicle and a deformation adjustment method of the battery pack, the battery pack comprising: a battery pack base and a controller; the battery pack base comprising: a base assembly, a collision area is formed in the base assembly, the collision area comprises a plurality of detection sub-areas; a hydraulic assembly is in communication with the collision area and is suitable for filling liquid; and a detection assembly is arranged in the collision area and is suitable for detecting the deformation state of any detection sub-area in the collision area. The battery pack base provided by the application is provided with the hydraulic assembly in communication with the collision area and the detection assembly, and under the coordination of the controller, when deformation of any detection sub-area in the collision area is detected, the liquid is automatically driven to flow to the area, a fundamental change from passive resistance to active adjustment of the protection mechanism is realized, the risk of irreversible plastic deformation of the battery pack shell is significantly reduced, and the safety and reliability of the battery pack are improved.

The invention relates to an orthopedic joint device, comprising: an upper part (10) and a lower part (20) which are mounted on one another so as to be pivotable relative to one another about a pivot axis (15); and passive resistance means (30) arranged between the upper part (10) and the lower part (20) and arranged to provide resistance against pivoting of the upper part (10) relative to the lower part (20), in which motor drive means (60) are arranged between the upper part (10) and the lower part (20), the motor drive is configured to cause, support or hinder pivoting of the upper part (10) relative to the lower part (20).

The invention relates to the technical field of medical equipment, in particular to a movement assisting sickbed for a hemodialysis patient. A first sliding groove is formed in one side of the upper end of a bed plate, a moving opening is formed in one side of an L-shaped plate in a penetrating mode, second sliding grooves are formed in the inner walls of the two ends of the moving opening, and a sliding rail is fixedly connected to the outer wall, located at the lower end of the moving opening, of the L-shaped plate; one side of the L-shaped plate is fixedly connected with a telescopic damper wrapped with a spring, and the side, fixedly connected with the spring, of the output end of the telescopic damper is provided with an opening hole. The hollow pedal adopts a light hollow structure, and the sliding design of the lower end sliding plate and the first sliding groove is matched, so that it is ensured that transverse movement is smooth and low in inertia; the fitting degree with the sliding rail can be accurately adjusted along with the transmission of the rotating rod screw sleeve through the matching of the side surface opening and the U-shaped opening of the pin rod, so that the dynamic control of the friction force is realized; one end of the telescopic damper wrapped with the spring is fixed to the L-shaped plate, the other end of the telescopic damper is rigidly connected with the hollow pedal, and progressive passive resistance can be provided through the elastic force of the spring.

The invention belongs to the technical field of electronic test instruments, and particularly relates to a signal generator analog channel structure and method for reducing signal floor noise, and the structure is sequentially connected with a first-stage amplification unit, a first attenuation network, a second-stage amplification unit, a second attenuation network and a power amplification unit along a signal transmission direction. Wherein the second-stage amplification unit adopts N operational amplifiers (N is greater than or equal to 2) which are arranged in parallel, and the noise density of the input reference voltage is remarkably reduced by utilizing the synchronous amplification effect of the parallel operational amplifiers on signals and the averaging effect on internal noise. In addition, each attenuation network adopts a passive resistance network controlled by a relay, so that nonlinear distortion and power supply noise introduced by an active switch are avoided. Through the synergistic effect of preceding-stage high-gain distribution, parallel operational amplifier noise reduction and relay passive attenuation, the overall bottom noise of an analog channel is effectively reduced, and the signal-to-noise ratio during small signal output is remarkably improved.

The invention discloses an anti-loosening fixing device for a battery cell PACK, and the device comprises a battery cell box which comprises a battery lower housing and a blocking frame surrounding the periphery of the battery lower housing, and is used as a bearing structure of the battery cell; the battery cell module fixing structure is arranged in the battery cell box body, a battery cell module fixing cavity is formed in the battery cell module fixing structure, and the battery cell module fixing structure is used for accommodating and positioning a battery cell module; and the anti-loosening fixing structure is detachably mounted on the battery lower shell, is connected with the battery cell module fixing structure and is used for locking and fixing the battery lower shell and the battery cell module fixing structure. The anti-loosening device has the beneficial effects that a special anti-loosening structure is designed on the basis of the physical principle of the wedging effect, rotation energy causing loosening is actively converted into locking force for restraining loosening, crossing from passive resisting to active locking is achieved, rapid disassembly and assembly, long-acting vibration resistance and creep aging resistance are achieved, and the service life of the anti-loosening device is prolonged. The industrial problem that a traditional fixing mode cannot give consideration to maintenance convenience and long-term reliability is effectively solved.

The application discloses an optical chip encryption communication module and relates to the technical field of quantum encryption communication.The method comprises the following steps: a field programmable logic gate array, a microprocessor, an optical chip, a memory and a high-speed analog / digital converter chip are used; the field programmable logic gate array is respectively connected with the memory, the optical chip, the high-speed analog / digital converter chip and the microprocessor in communication, and the field programmable logic gate array, the microprocessor, the optical chip, the memory, the high-speed analog / digital converter chip and a passive resistance-capacitance device are integrated; the optical chip is internally provided with a quantum true random number generator, unpredictable true random numbers are generated through quantum physical phenomena, and encryption keys are generated based on the true random numbers, which help to solve the problem that the prior art cannot realize miniaturized integration and high-security-level optical chip encryption communication.

The application discloses a preparation method of a silicon-based adapter plate heterogeneous integrated fan-out SiP packaging module, first, a silicon-based TSV functional adapter plate of a thin film resistor and a thin film capacitor is prepared, passive devices and the silicon-based adapter plate are integrated by oxidation, deep reactive ion etching, insulation layer deposition, seed layer sputtering, copper filling, CMP planarization, double-sided RDL and Ni / Au pad preparation; then, the heterogeneous bare chip PAD is pretreated by electroless nickel plating, ball planting and FC flip to complete the integration of the bare chip and the adapter plate; subsequently, epoxy resin is used for fan-out injection molding and plastic packaging, and then a BGA solder ball lead-out end is made at the bottom of the plastic package body to obtain a finished product. The application integrates passive resistance and capacitance devices in the silicon-based adapter plate, saves an additional device assembly process, improves the connection reliability of the heterogeneous bare chip, realizes shell-free, lead-free and high-density fan-out packaging as a whole, effectively reduces the packaging cost, and can be widely applied to multi-chip system-level integration scenes.