216 results about "Stress mode" patented technology

A ring oscillator has an odd number of NOR-gates greater than or equal to three, each with first and second input terminals, a voltage supply terminal, and an output terminal. The first input terminals of all the NOR-gates are interconnected, and each of the NOR-gates has its output terminal connected to the second input terminal of an immediately adjacent one of the NOR-gates. During a stress mode, a voltage supply and control block applies a stress enable signal to the interconnected first input terminals, and an increased supply voltage to the voltage supply terminals. During a measurement mode, this block grounds the interconnected first input terminals, and applies a normal supply voltage to the voltage supply terminals. Also included are an analogous NAND-gate based circuit, a circuit combining the NAND- and NOR-aspects, a circuit with a ring oscillator where the inverters may be coupled directly or through inverting paths, and circuits for measuring the bias temperature instability effect in pass gates.

The invention discloses a silicon piezoresistive wind speed and direction sensor based on the microelectronic mechanical technology, which consists of an insulating substrate and four wind speed measuring units which are same and are distributed symmetrically, and detects the components of wind speed in the two orthogonal directions respectively; each wind speed measuring unit consists of an electrode, a mechanical anchor point, a silicon piezoresistive beam, a silicon support beam and a silicon cantilever beam; when the wind blows the surface, the cantilever beam is taken as a wind-sensing element and is pressed by a force of airflow vertical to the cantilever beam so as to generate deformation and acts on the silicon piezoresistive beam by an axial stress mode through a microlever structure consisting of the silicon piezoresistive beam, the silicon support beam and the silicon cantilever beam, thus causing the change of the value of silicon piezoresistive; the wind speed and the wind direction are detected by detecting the change of piezoresistance of each wind speed measuring unit; two-dimension wind speed and the measurement of wind direction are realized by differential detection; the piezoresistive wind speed and direction sensor has simple manufacture, high sensitivity and better anti-interference performance.

The invention describes a novel test structure and process to create the structure for performing automatic dynamic stress testing of PMOS devices for Negative Bias Temperature Instability (NBTI). The invention consists of an integrated inverter, two integrated electronic switches for switching from stress mode to device DC characterization measurement mode, and a PMOS FET device under test (DUT). The inverter assures the proper 180 degree phase relationship between the test device source and gate voltage while the imbedded electronic switches provide isolation of the test device during DC characterization testing. Another embodiment of the invention enables the testing of multiple devices under test (DUT's).

An internal voltage fall-down circuit includes a reference voltage generating section for variably generating an optimum reference voltage level of which is compensated for depending on changes in the present reference voltage before fuse blowing, a reference voltage transforming section for receiving the reference voltage from the reference voltage generating section and then transforming the reference voltage into voltage for a normal mode or a stress mode which are presently set, and a driver section for providing a signal from the reference voltage transforming section to an internal circuit as an internal supply voltage.

The invention relates to a robot palletizer for carrying. The robot palletizer comprises a base, a rotary rack, a large arm parallelogram mechanism, a wrist horizontal posture keeping parallelogram mechanism, an arm parallelogram mechanism, a wrist and an inclined guide rail, wherein the rotary rack is arranged on the base, the large arm parallelogram mechanism is arranged on the rotary rack, the arm parallelogram mechanism is connected with the large arm parallelogram mechanism and the wrist horizontal posture keeping parallelogram mechanism, the wrist is connected with the arm parallelogram mechanism, the inclined guide rail is arranged on the rotary rack, a sliding block driven by a linear driving element is arranged on the inclined guide rail and is movably connected with a fixed connecting piece at the lower end of a large arm below the wrist horizontal posture keeping parallelogram mechanism, the lower end of a large arm above the large arm parallelogram mechanism is coaxially connected with the upper end of the linear driving element, and the lower end of the linear driving element is connected with the rotary rack by a rotary hinge. According to the robot palletizer, the machinery structure of the robot palletizer is simplified, and the stress mode of the mechanism is optimized, so that the structure is compact, the energy loss is saved, and the manufacturing cost is low.

Disclosed is an integrated circuit (IC) chip with a built-in self-test (BIST) architecture that allows for in the field accelerated stress testing. The IC chip can comprise an embedded processor, which selectively alternates operation of an on-chip test block between a stress mode and a test mode whenever the IC chip is powered-on such that, during the stress mode, the test block operates at a higher voltage level than an on-chip functional block and such that, during the test mode, the test block operates at a same voltage level as the functional block and is subjected to testing. Also disclosed are a system, method and computer program product which access the results of such testing from IC chips in a variety of different types of products in order model IC chip performance degradation and to generate IC chip end of life predictions specific to the different types of products.

The invention discloses a method for predicting the vibration fatigue performance of a viscoelastic material. The method comprises the following steps of: processing the viscoelastic material of which the vibration fatigue performance is to be predicted to a material with the size needed by a viscoelastometer; determining the stress mode, temperature, deformation vibration amplitude and the like of a vibration fatigue test sample according to the state of the material in the actual service environment; performing a vibration fatigue test; acquiring various performance parameters of the material after every fixed cycle fatigue period; analyzing the acquired performance parameters of the viscoelastic material; and predicting the long-term performance and life cycle of the material. By the method, the vibration fatigue performance of the viscoelastic material can be acquired and the long-term performance of the viscoelastic material under vibration fatigue and service life can be predicted.

The invention discloses a test method of compound cracking of an asphalt mixture. According to the test method, proper test conditions and test indexes are selected to realize laboratory simulation for the compound cracking of the asphalt mixture, wherein an asphalt mixture testing component can be placed to different stressing modes in order to realize an open type (type I) compound cracking mode and a shearing type (type II) compound cracking mode; three test index parameters proposed in the test method, namely, peak load, breaking energy and crack angle, show definite physical meaning, therefore, the compound cracking characteristic of the asphalt mixture can be quantifiably represented, and the cracking performance of the asphalt mixture at a low temperature condition also can be assessed. The test method can be applied to the study on expansion mechanism of a reflection crack of the asphalt mixture, and can provide a guide for the design of an asphalt concrete pavement structure and material, thus improving the cracking performance of an asphalt concrete pavement.

An integrated circuit is provided, which includes a transistor device under test, an AC drive circuit, an AC bias circuit and a DC bias circuit. The AC drive circuit generates an AC drive signal. The AC bias circuit biases the transistor device under AC bias conditions in response to the AC drive signal. The DC bias circuit biases the transistor device under DC bias conditions. A switch circuit selectively couples the transistor device to the AC bias circuit in an AC stress mode and to the DC bias circuit in a DC measurement mode.

The physical therapy tools, systems, kits and methods described herein may be used to apply gentle, passive and progressive amounts of pressure (including numerous repetitions of small movements) to achieve therapeutic mobilization of a spinal joint. The tools described herein may include a plurality of pads and actuators, where the pressure within each actuator is controlled so that a continuously varying pressure may be applied to mimic the pressure applied by human hands. These tools may also include a controller and one or more user inputs. The physical therapy tools may be operated at different operating modes (e.g., continuously varying pressure modes, step-pulse high frequency modes, step-pulse low frequency modes) for treating a subject's spine, and may be part of a system or kit. Methods of treating a subject using these physical therapy tools are also described herein.

The invention provides a wheel force transfer function testing method and device in a free state. The testing method comprises the following steps that the position of a wheel is determined; the wheel force transfer function testing device is installed on a wheel hub of the wheel; a wheel center accelerometer and a tire top accelerometer are arranged; a testing system is connected; transfer functions of wheel center accelerometer signals to force triggering device excitation signals and transfer functions of tire top accelerometer signals to the force triggering device excitation signals are calculated; a wheel force transfer function is obtained through calculation. The force transfer function testing device which is connected with the wheel is designed and mainly solves two key problems in a wheel vibration isolation test, on one hand, exciting force response in three directions at the wheel center of the wheel can be obtained in one time, and on the other hand, the purpose that the tire leather vibration response is obtained by exciting the wheel center of the wheel is achieved as far as possible, and the actual stress mode of the wheel is simulated more truly. Therefore, the whole test is more convenient and closer to the actual condition.

A computer and method automatically switches from a manufacture mode to a user mode in a basic input and output system (BIOS) chip of the motherboard. The computer invokes an interrupt program to switch from a manufacture mode number to a user mode number in a BIOS setting file. The computer initializes the diagnostic mode according to the parameters of the diagnostic mode and the stress mode according to the parameters of the stress mode. The computer configures the BIOS setting file to a user mode according to the user mode number, and saves configuration into the BIOS chip when the BIOS chip starts.

The invention belongs to the field of micro-alga bio-energy research, and relates to a method for rapidly accumulating lipid by high-temperature stress on micro-algae. The micro-algae are cultivated inside a reactor until the micro-algae enter the last stage of the exponential phase and cultivated for 1-2 days in a stress mode in a high-temperature environment, and then high-lipid-content micro-algae are obtained through centrifuging. The method is easy to implement, short in consumed time and high in efficiency, does not affect the biomass concentration of scendesmus quadricauda, is beneficial to increasing the yield of the lipid and can promote the scendesmus quadricauda to rapidly accumulate the lipid. The high-lipid micro-algae produced through the method can be used for extracting gasoline, diesel oil and aircraft fuel and serve as the raw material of a plastic product and medicine.

The invention discloses a testing device for compound type cracking of an asphalt mixture, which is used for researching a compound type cracking characteristic of the asphalt mixture, and utilizes a special design of a testing device, so that the testing device has the rotatable performance; and an asphalt mixture test piece can be at different stressing modes to realize an opening type (type I) and a shearing type (type II) combined cracking mode, so that a cracking behavior of the asphalt mixture under cracking modes with different compound type levels can be accurately simulated. Along the rotation of a testing clamp, different angles can be formed in a notch direction and a tensile load direction of the asphalt mixture test piece, so that a compound type cracking test for compounding with different proportions can be obtained.

The invention discloses a mining roadway coal pillar reinforcing method. The method comprises, firstly, reinforcing roadway coal pillars through common anchor belt net supports; secondly, drilling coal sidewalls and penetrating the coal pillars, inserting extension anchor rods (4) into the drilled holes and laying steel strips or steel channel beams (6) on both sides of every extension anchor rod (4), wherein the steel strips or steel channel beams are arranged on constructed steel strips (5) to connect meshes (7) and the steel strips (5) into a whole to enhance the surface protection effects on the coal pillars; meanwhile, exerting high prestress on both ends of every extension anchor rod to enable the extension anchor rod to be in a three-directional stress mode and accordingly effectively control the deformation of the coal pillars in earlier stages. The extension anchor rods can be extended randomly according to the size of a roadway without restriction of roadway space, thereby being large in width applicable to the coal pillars and wide in application range. Compared with opposite-pull anchor cables, the extension anchor rods have a higher elongation rate, are applicable to the deformation characteristics of the coal pillars and can ensure no collapse of the coal pillars when large deformation occurs due to mining operation and guarantee the production safety of a mining working face.

The invention discloses a method for reinforcing a wood beam by adhering a steel plate, which relates to the field of building engineering. The method adopts the technical scheme that the carrying capacity of the wood beam is improved by adhering the steel plate to the tensioned edge of the wood beam and anchoring through an expansion bolt according to a stress mode of a simple support wood beam (the upper part is provided with a pressed edge and the lower part is provided with a tensioned edge). The method can overcome the defects of a substitution method, effectively prevent the damage of the original structure, and ensure that the bearing capacity and durability of the wood beam meet the following use requirement; and the bearing capacity of the reinforced wood beam is improved by more than 50 percent.

The invention relates to a splicable flange plate of a bridge. In the invention, one side of the splicable flange plate is provided with a secondary casting cast-in-situ wet joint section; reserved connecting reinforcing steel bars conforming to the structure are respectively arranged at the side of an advanced prefabricated flange and above the flange; and moreover, transverse reinforcing steel bars (vertical to the spanning direction of the bridge) at the upper edge and the lower edge in the splicable flange plate both adopt stressed thick reinforcing steel bars to ensure that the structure can simultaneously bear positive and negative bending moments. The invention establishes a foundation for the design and construction standardization of the splicing and broadening reformation of the bridge, simplifies complicated bridge designs and defines complicated stressing modes. The total cost of the splicable flange plate is greatly reduced, and the social benefit is obviously increased. After the splicable flange plate is applied to the construction of interchange bridges constructed in stages or bridges which are designed by modules and simultaneously constructed, fully-prefabricated splicing can be realized, and the construction schedule is accelerated; the splicable flange plate can be used for guaranteeing the using functions and the integral coordination of a main bridge and is convenient for continuous construction; and the splicable flange plate provides great adjustment leeway for subsequent design optimization and also provides a technical support for upgrading and reforming.

The invention discloses a maritime buoyancy tank combined type adjustable fitting convenient for the buoyancy tank assembly operation in maritime storms. The invention consists of a woggle connector and a shearing force connector. The woggle connector consists of two woggle connector seats, a long monaural slide block and a short monaural slide block, a long monaural connecting shaft, a short monaural connecting shaft, a connecting board, a circlip for shaft, a brake pin and an eyebolt. The two ends of woggle connector seats are provided with push-pull cut openings for the brake pin. The long monaural slide block is connected with the long monaural connecting shaft. The short monaural slide block is connected with the short monaural connecting shaft. The connecting shafts are respectively fixed on the connecting board. The end surfaces of the connecting shafts are respectively provided with the circlip for shaft. The brake pin is arranged in the push-pull cut openings for the brake pin. The end part of the woggle connector seat is fixed with the eyebolt. The shearing force connector consists of a round tube for the connector A fixed on the connector A seat and a semi-circle sleeve for the connector B fixed on the connector B seat. The invention realizes the redistribution of an external load in the inner part of the joint, simplifies the stress mode of the connectors as much as possible, realizes 'labor division loading' and improves the overall loading capacity of the adjustable fitting.

The invention discloses a metal plate forming process of an aircraft stepped thin-walled part. The process includes the steps of determining the size of a blank, conducting blanking, obtaining a basin-shaped initial type piece through dual deep drawing forming, and obtaining the final part through rubber bag hydraulic secondary forming after cutting. The traditional forming mode achieved by hitting a mold by hand is replaced with the mode of conducting hydraulic forming after deep drawing, the machining efficiency can be effectively improved, and the part machining quality can be improved. By means of the dual deep drawing forming mode, the stress mode during deep drawing is improved, and the situations of thinning and stress concentration of the part are avoided. By means of the rubber bag hydraulic forming, negative-angle bent edges are obtained, and the defects of the deep drawing process are overcome. The production efficiency of the part can be effectively improved, higher economic benefits can be obtained, and the product quality can be ensured.

The invention relates to a method using a multi-pilot-tunnel expanding excavation large-diameter shield tunnel for building a subway station. In a single-hole double-track tunnel, pipe piece structures of the bottom and the top of a shield are reserved, and a bottom longitudinal beam, a middle partitioning beam and a top longitudinal beam of a station structure are subjected to construction. The residual station structures on the two sides of a shield tunnel are formed by expanding excavation, air flues at the two ends are used as working faces, through a separating expanding excavation construction method, station portions on the two sides of the large shield tunnel are subjected to excavation and supporting from top to bottom, structure casting of the station expanding excavation portions is completed from bottom to top, meanwhile, measures of connecting between a cast-in-place structure and a reserved pipe piece are well carried out, and a single-layer side platform subway station. According to the method using the multi-pilot-tunnel expanding excavation large-diameter shield tunnel for building the subway station, the stress mode of a structure stress system is converted from initial pipe piece annular stress into combination of a part of the pipe piece, initial-supporting stress and beam-wall stress, and the structure has the advantages that stress is clear, converting is reasonable, and construction is convenient.

The invention relates to the technical field of shield tunnels, and provides a loading device for shield tunnel lining ring full-scale test. The device comprises a jack for applying force, and furthercomprises a resistance spring and an annular reaction wall, wherein a test area for placing an annular test duct piece is arranged in the reaction wall, one end of the jack and one end of the resistance spring are both arranged on the reaction wall, and the other end of the jack and the other end of the resistance spring are both acted on the test duct piece. The invention further discloses a loading method for shield tunnel lining ring full-scale test. The continuous change among different working conditions can be realized by adjusting the jack pressure, the mechanical characteristics of the test duct piece in the whole loading process of a full-scale test can be simulated, the adjustment on different strata and different stress modes by the resistance spring can be realized, and the action of asymmetric load can be realized; and the loading device and method have wider applicability and accuracy.