102 results about "Design margin" patented technology

The invention discloses a safety protection system for a crane, comprising a plurality of sensors, a controller and a protection action actuating mechanism. The sensors detect and transmit the working state of the crane to the controller in real time; according to the detection data of the sensors, the controller calculates maximum allowable load determined by the characteristics of the crane under the current working state; the determined maximum allowable load is compared with the maximum allowable load related to the characteristics of the crane, then a minimum value therein is taken, and after predetermined design margin is taken, a rated working load G is obtained; according to the data of the sensors, current actual lifting weight is obtained through calculation; the actual lifting weight is compared with the rated working load, and if the actual lifting weight exceeds a preset safe range, the controller sends out a safety protection control signal limiting the crane to move toward the dangerous direction; and the protection action actuating mechanism limits the crane to move toward the dangerous direction according to the safety protection control signal. The invention provides a crane using simultaneously the safety protection system.

The invention discloses a method for evaluating a single-particle effect index of a satellite device. The evaluating method comprises the following steps of: acquiring a single-particle turnover test value of a to-be-evaluated device by testing or simulating; calculating a single-particle turnover index required prediction value, required by a task, of the to-be-evaluated device; acquiring a radiation design margin according to a test expected value of the single-particle turnover index of the device and the single-particle turnover index required prediction value; and evaluating the radiation risk level of the device according to the radiation design margin. According to the technical scheme, the method for evaluating the single-particle effect index of the satellite device can effectively direct the model selection of the satellite device by calculating the single-particle turnover rate index of the device, and provide quality assurance for the satellite to victoriously finish the task.

The invention discloses a single freedom degree magnetic levitation rotor support system, a magnetic levitation bearing and a magnetic biasing weight reducing device. The single freedom degree magnetic levitation rotor support system is composed of an attraction type axial magnetic levitation bearing (24), attraction type radial magnetic levitation bearings (25,26), magnetic biasing weight reducing devices (27,28) and air gap limit protective devices (29,30) of the axial and radial magnetic levitation bearings which are all arranged in the same movement mechanism. Active cell parts and stator parts of the axial and radial bearings are composed of a permanent magnetic field or a controllable magnetic device not generating non-work air gap magnetic leakage loss. So long as designing margin of the magnetic field is enough, the system of the invention can operate stably without adopting any form of sensor feedback control technology.

An apparatus having an inter-domain electrostatic discharge (ESD) protection circuit for protection of an integrated circuit (IC) with multiple power domains. The protection circuit in response to an ESD event provides an ESD protection between different power domains. Specifically, the protection circuit comprises at least one clamp coupled to one power domain, which conducts current during an ESD event to provide extra current in the interface line between the two different power domains. This extra current also in turn increases the voltage over the impedance element on the interface line, thus improving the design margins for the ESD protection and providing a better ESD protection capability for IC products.

To achieve promotion of stability of operational function of display device and enlargement of design margin in circuit design, in a display device including a pixel portion having a semiconductor element and a plurality of pixels provided with pixel electrodes connected to the semiconductor element on a substrate, the semiconductor element includes a photosensitive organic resin film as an interlayer insulating film, an inner wall face of a first opening portion provided at the photosensitive organic resin film is covered by a second insulating nitride film, a second opening portion provided at an inorganic insulating film is provided on an inner side of the first opening portion, the semiconductor and a wiring are connected through the first opening portion and the second opening portion and the pixel electrode is provided at a layer on a lower side of an activation layer.

A first delay circuit and a second delay circuit having different operation conditions from each other, a detection circuit that detects a difference in propagation speed of a pulse signal, which is simultaneously input to the first and second delay circuits, and a setting circuit that generates a selection signal based on a detection result from the detection circuit are provided. The selection signal is supplied to a delay control circuit that generates an operation timing signal by delaying a reference signal, of which a delay amount is controlled by the selection signal. With this arrangement, a necessity to set the delay amount of the delay control circuit with a large design margin can be eliminated considering PVT variation, and as a result, performance degradation can be prevented.

After predicting a relationship between a design margin set against a fabrication variation in design of an LSI and a yield, a specific design margin for attaining a given yield is calculated based on the predicated relationship. The yield is a delay yield obtained by cumulating a signal propagation delay time thereby achieving a probability that a signal propagated through a logic circuit of the LSI is delayed by a given amount of time, and the design margin is a derating factor indicating a ratio between the signal propagation delay time and a standard value of the signal propagation delay time.

Battery life in portable entertainment devices that play fixed-length music or video files (e.g., MP3 music files) is extended by adaptively adjusting the speed of a processor in the device such that only a minimum number of MIPS are performed to playback the music or video files. Slowing the processor clock provides significant savings in power usage. A use profile containing required MIPS for each song may be stored on the device, or use profile information may be inserted into the data stream or embedded within the data file. Power savings occurs on every subsequent replay of the same entertainment data file or data stream by adaptively adjusting the processor clock to the desired speed as determined by the use profile information (plus design margin based on the particular playback device).

A pixel structure and an organic light-emitting diode (OLED) display panel incorporating the pixel structure are disclosed. The pixel structure includes a plurality of pixel units (110) arranged in an array, each pixel unit comprising a first sub-pixel (111), a second sub-pixel (112) and a third sub-pixel (113). The second sub-pixel (112) and the third sub-pixel (113) are common to four adjacent pixel units (110). As a result, a higher aperture ratio of the sub-pixels, an increased design margin and reduced process difficulty can be obtained.

A nuclear power plant and an operation method of the nuclear power plant, which can uprate plant power without greatly modifying the construction of plant equipment, while keeping a core's pressure loss characteristic, a safety margin, and a design margin in the transient state substantially the same as those before the power uprate. Thermal power in a second operation cycle of a nuclear reactor is uprated from thermal power in a first operation cycle preceding the second operation cycle at least one operation cycle. A proportion of steam extracted from a steam system and introduced to a feedwater heater, which is in particular extracted from an intermediate point and an outlet of a high pressure turbine, with respect to a flow rate of main steam is reduced in the second operation cycle from that in the first operation cycle such that temperature of feedwater discharged from the feedwater heater lowers in the range of 1° C. to 40° C. in the second operation cycle.

The invention provides methods and apparatus for for determining and providing optimum write bit line current and write word line current in an MRAM. A single reference potential is used to determine the values of the write line current and the bit line current. In determining the optimal values, asteroid curves representing bit line magnetic fields H_x generated by write bit line current I_B and word line magnetic fields H_y generated by write word line current I_w for magnetization are considered, and an asteroid curve AC_out is defined outside the asteroid curves of all memory cells taking manufacture variations and design margins into account. A write bit line current and a write word line current are selected such that the write current obtained by adding the write bit line current or currents and the write word line current, or the write power consumed by the bit line or lines and the write word line is minimized. Furthermore, in order to prevent multi-selection, the write bit line current and the write word line current are selected so that they generate a synthetic magnetic field on the curve between calculated points of the asteroid curve AC_out.

The invention provides a transmission delay test method and a transmission delay test device based on FPGA. Two clock phases that are constantly tightening are simulated by two different cycles of clocks. and an edge synchronization detection unit determines the time at which the effective clock edges of the two clocks are aligned, and the signal reception determination unit determines the time when the fast clock cannot acquire the slow clock signal, A phase difference between the two clocks is then calculated based on the number counted by the counter in the time interval between the alignment of the two clock valid clock edges to the acquisition of the slow clock signal by the fast clock, Then the transmission delay of the circuit to be tested is determined by the phase difference and the period of the slow clock, which effectively improves the accuracy of the transmission delay test, so that the user can reasonably reduce the design margin in the FPGA application, and can give fullplay to the performance of the FPGA chip.

An improved lateral bipolar electrostatic discharge (ESD) protection device (40) comprises a semiconductor (SC) substrate (42), an overlying epitaxial SC layer (44), emitter-collector regions (48, 50) laterally spaced apart by a first distance (52) in the SC layer, a base region (54) adjacent the emitter region (48) extending laterally toward and separated from the collector region (50) by a base-collector spacing (56) that is selected to set the desired trigger voltage Vt1. By providing a buried layer region (49) under the emitter region (48) Ohmically coupled thereto, but not providing a comparable buried layer region (51) under the collector region (50), an asymmetrical structure is obtained in which the DC trigger voltage (Vt1_DC) and transient trigger voltage (Vt1_TR) are closely matched so that ∥Vt1_TR−Vt1_DC∥˜0. This close matching increases the design margin and provides a higher performance ESD device (40) that is less sensitive to process variations, thereby improving manufacturing yield and reducing cost.

The invention discloses a high-voltage loop control device and method for an electric automobile, and belongs to the field of a new energy automobile. The control device comprises a temperature monitoring module, an electric current monitoring module and a control module. Through monitoring the real-time temperature of each of temperature monitoring points in a high-voltage loop, because when the automobile normally travels, a long-time overload current cannot occur in the high-voltage loop circuit, the temperature of each of the temperature monitoring points can be maintained within a set temperature range; when the real-time temperature of any of the temperature monitoring points is higher than the corresponding preset temperature, the situation that the current temperature monitoring point is abnormal is indicated; besides, through monitoring the electric current of a DC bus, when the real-time electric current of the DC bus exceeds a set electric current, the high-voltage loop can be damaged, so that if the output power of a power battery pack is reduced immediately or the high-voltage loop is cut off, the situation that the structure of the high-voltage loop is burn up can be avoided; and during design, a reserved design margin is reduced, and the design cost and the design difficulty are reduced.

The invention discloses a flight parameter signal generating system. The system includes an upper computer man-machine interaction interface and a lower computer signal generating system, wherein thelower computer signal generating system includes an engine system module, a hydraulic pressure fuel oil system module, a power system module, a navigation attitude system module, a bus system module and the like. LabVIEW is adopted for designing the upper computer man-machine interaction interface, an Access database is selected for storing parameter data set by an upper computer and a lower computer communication network is constructed by taking an STM32 as a main control module in combination with RS485 technology. Switching quantity signals are achieved by adopting a single-chip microprocessor in combination with a photovoltaic coupler. Analog quantity signals are generated through controlling a DAC chip by the single-chip microprocessor. AC rate signals are generated through an AC ratetable. Generation of synchronizer signals is realized through a chip AD9959. Generation of ARINC429 is realized through controlling HS-3182 and HS-3282 by the single-chip microprocessor. Generation of AC power signals is realized through a voltage transformer. A DC power supply power source is achieved through a voltage stabilizing chip. Flight parameters are allocated to different signal generation modules. On one hand, management is facilitated. On the other hand, design margin is realized and addition and reduction of signal generation modules are facilitated.

The invention discloses a close-loop simulation-based distributed load optimization design method for a carrier. The method comprises the steps of firstly building a six-degree-of-freedom dynamics model for the carrier, then performing close-loop simulation to obtain dynamics parameters, building a distributed load shear force calculation model, a bending moment calculation model and an axial force calculation model of the carrier, and calculating lower section shear force, lower section bending moment and section axial force of each site of the carrier; and secondly, rechecking the situation on whether loads of the carrier meet the requirements or not, if the loads of the carrier meet the requirements, ending the design, if the loads of the carrier do not meet the requirements, optimizing a close-loop simulation input, re-obtaining the dynamics parameters, and calculating the lower section shear force, the lower section bending moment and the section axial force of each site, until the loads of the carrier meet the requirements. According to the method, the loads on all the sections of the carrier of a rocket in a flight process can be really reflected; and therefore, the method is of great significance for rechecking the completeness and design margin of load design.