109results about How to "Accurate life" patented technology

An air conditioning system for use in an over-the-road or off road vehicle is provided that allows operation during both engine on and engine off conditions. The system utilizes a variable speed, motor driven compressor controlled by an intelligent power generation management controller. This controller selects from one of the available sources of power on the vehicle to drive the compressor, and modulates the compressor speed and capacity based on operational parameters and source availability and depletion. The controller may also operate a coolant or air heater to provide heating to the interior compartments.

A plurality of resistance value tables of a battery group with respect to temperature and SOC of the assembled battery, which are measured in advance when currents of different change patterns flow in the assembled battery, are stored. A resistance value for the assembled battery is calculated, based upon its voltage and current. From among the plurality of resistance value tables, a resistance value table is selected so that it corresponds to the change pattern of the current flowing in the assembled battery when the voltage and the current of the assembled battery were measured, and a resistance value is searched for from that resistance value table corresponding to the temperature and the SOC of the assembled battery. Then the calculated resistance value and the one from the table are compared to determine the life of the assembled battery.

A method for signaling a failure condition of a bearing of a turbocharger that includes a sensor configured for sensing information on off-axis rotor motion. The method entails receiving a stream of information from the sensor, decomposing the stream of information into a set of components representing different frequencies, using a subset of components that represent a range of frequencies known to be indicative of bearing failure to calculate a probability of failure of the bearing, signaling a failure condition of the bearing if the probability of failure exceeds a critical threshold, and if the present indicia of off-axis rotor motion does not indicate a complete failure condition has occurred, determining a time interval until another probability of failure of the bearing will be calculated. The time interval can vary based upon the rate that the probability of failure has changed over multiple time intervals.

The invention discloses a method for predicting a corrosion lifetime of a casing pipe, which belongs to the field of corrosion protection of oil and gas well. The method is characterized by comprising the following steps: firstly performing corrosion test for casing pipe steel under a simulation working condition by utilizing a high-temperature high-pressure kettle, obtaining a uniform corrosion rate value, then obtaining an actual wall thickness of the casing pipe, and respectively solving remaining internal pressure strength and remaining collapse resisting strength of the casing pipe by utilizing the actual wall thickness of the casing pipe; and then calculating a remaining internal pressure resisting safety coefficient and a remaining collapse resisting strength safety coefficient of the casing pipe, respectively calculating an internal pressure resisting safety service lifetime and a collapse resisting safety service lifetime of the casing pipe according to a given internal pressure resisting safety coefficient threshold value and a collapse resisting safety threshold value, and finally obtaining a safety service lifetime of the casing pipe. The method has the advantages that the lifetime of the casing pipe can be reasonably predicted, and the safety risk caused by the corrosion of the oil and gas well casing pipe can be reduced or avoided.

The embodiment of the invention provides a filter screen service life detecting method and device, and relates to the field of air purification. The problem that the service life of a filter screen can not be determined precisely in an existing air purification device is solved. The method comprises the steps of acquiring the current rotating speed and the current PWM pulse signal duty ratio of a motor, acquiring the filter screen saturation grade matched with the current PWM pulse signal duty ratio and the current rotating speed of the motor from a filter screen saturation grade table according to the current PWM pulse signal duty ratio and the current rotating speed of the motor, and determining the service life of the filter screen according to the filter screen saturation grade matched with the current PWM pulse signal duty ratio and the current rotating speed of the motor, wherein the filter screen saturation grade table is a mapping relation table among the filter screen saturation grade, the interval range of the rotating speed of the motor and the interval range of the PWM pulse signal duty ratio of the motor. The method and device are used for detecting the service life of the filter screen.

An electricity accumulating device includes capacitors connected in series, balanced voltage adjusting portions connected to the capacitors respectively, and a control circuit connected to the balanced voltage adjusting portions. The control circuit performs the following operations: measuring two voltages at different times from each other across each capacitor during the non-charge-or-discharge period of the capacitors by using the balanced voltage adjusting portions; calculating the absolute value of the difference between the two voltages; determining the balanced voltage of each of the capacitors according to the absolute value; and controlling the balanced voltage adjusting portions to make the voltage across each capacitor a balanced voltage.

The invention belongs to the technical field of monitoring of torsional vibration of a turbine-generator shaft system, and particularly relates to a method and system for monitoring large disturbance transient impact torsional vibration of the turbine-generator shaft system. The method comprises the steps of carrying out simulation calculation on shaft system torsional vibration caused by large disturbance of a power system under the coordination effect of an electromechanical network, establishing the correspondence between the maximum value of the electromagnetic torque of a generator and the fatigue life loss of the shaft system under large disturbance of the power system, setting a damage alarm threshold value and a tripping halt protection threshold value, calculating the electromagnetic torque of the generator according to the three-phase current and voltage of the generator, sending a damage alarm signal or a tripping halt protection signal in time when the safety of a generator set is threatened, and finally carrying out shaft system torsional vibration dynamic response calculation on the torsional vibration fault so as to accurately estimate the damage degree and the remaining life of the shaft system. By means of the method, on-line monitoring, analysis and protection of torsional vibration caused by the large disturbance fault of the power system be achieved, and accurate calculation of the fatigue life loss caused by torsional vibration of the turbine-generator shaft system can be achieved at the same.

An exposure apparatus for exposing a pattern of a mask onto an object, said exposure apparatus includes a light source part that includes a generating mechanism for generating a plasma, a condenser mirror for condensing a light radiated from the plasma, and a vacuum chamber for accommodating the generating mechanism and the condenser mirror, and has an opening that is provided at a position approximately corresponding to a position of a condensing point of the light condensed by the condenser mirror, an illumination optical system for illuminating the mask using the light from the light source part, a detector for detecting the light from the condensing point at an emission side of the condensing point, and an evaluation part for evaluating a life of the light source part based on a detected result by the detector.

The invention discloses a static strength and fatigue test device for a tumbler type shaft housing as well as its method. A static strength and fatigue test is implemented independently for the tumbler type shaft housing by taking an equivalent load converted from a line spectrum load, so that the test specifications and flows of loads in a plurality of directions are standardized to obtain a real and accurate shaft housing strength and fatigue test results and further assist in the improvement and optimization of the structure and stress design of the shaft housing. The test device for a static strength and fatigue test method of the tumbler type shaft housing comprises a loading beam and a shaft housing seat. A shaft housing body of the tumbler type shaft housing is fixed on the shaft housing seat. A shaft housing spring seat on the top of the tumbler type shaft housing is connected with a first vertical actuating cylinder. A second vertical actuating cylinder, a transverse actuating cylinder and a longitudinal actuating cylinder are connected to an elastic joint of the tumbler type shaft housing respectively.

One embodiment is an image forming apparatus that digitally performs image processing and correction processing of image information, and calculates toner consumption by performing a pixel count of the input multi-level image includes a counting portion that counts, pixel by pixel, the input signal levels of an input multi-level image; a weighting coefficient table that stores weighting coefficients corresponding to the input signal levels; a weighting calculation portion that obtains from the weighting coefficient table weighting coefficients corresponding to the input signal levels and performs weighting of each pixel when counting the input signal levels with the counting portion; and a rewriting portion that rewrites the weighting coefficients stored in a weighting coefficient table.

A method for predicting a remaining useful life of a lithium battery based on a wavelet denoising and a relevance vector machine, relating to a method for estimating health condition and predicting remaining useful life of lithium battery, includes steps of: (1) obtaining health condition data of each of charge-discharge cycles of the lithium battery by measurement; (2) processing capacity data measured of the lithium battery with wavelet double denoising; (3) calculating a capacity threshold where the lithium battery fails; (4) referring to capacity data and charge-discharge cycle data of the lithium battery, applying a differential evolution algorithm for optimizing a width factor of the relevance vector machine; and (5) predicting the remaining useful life of the lithium battery with the relevance vector machine optimized by the differential evolution algorithm. The method is simple and effective, which can accurately predict remaining useful life of lithium battery.

In order to be capable of high-precision gas measurement and evaluating influences of a gas on an electron source, and to predict a life of an image display device with high precision for a short period of time, there is provided a sealed container which is capable of maintaining an inside thereof to a lower pressure than an atmospheric pressure, and is used for an image display device including in the inside: a phosphor; an electron-emitting device for causing the phosphor to emit light; and a getter, the sealed container including an exhaust pipe having a breakable vacuum isolating member on at least one side of the image display device. Accordingly, after the exhaust pipe is connected to a gas measuring apparatus, by vacuum-exhausting the gas measuring apparatus and breaking the breakable vacuum isolating member, it is possible to perform a gas measurement on the image display device by using a measuring chamber having an orifice having a known conductance and installed in part of an exhaust channel of the gas measuring apparatus for vacuum-exhausting the image display device.

The invention provides a method for predicting the effective stress relaxation coefficient of a polymer matrix composite.The method includes the steps that firstly, a linear viscoelatic material constitutive equation in a time intra-domain integral form is established based on the Boltzmann superposition principle; then the effective stress relaxation rigidity of the polymer matrix composite formed by periodic unit cells is defined; then a mesomechanics model for solving an effective stress relaxation rigidity matrix of the polymer matrix composite is established based on the variation asymptotic homogenization theory; finally the effective stress relaxation rigidity of the polymer matrix composite is predicted based on the established mesomechanics model.According to the method, attributes of different materials in different directions can be obtained in the one-time solving process, and compared with a method in which rerunning is conducted under different loading conditions, the method is simpler, more convenient, more efficient and rapider.The calculated effective stress relaxation coefficient is consistent with the precision of a wave function, no more approximation relations need to be introduced, calculation precision is higher, and the strength and service life of the polymer matrix composite are predicted more accurately.

A life prediction method and device that can predict the life of a display device considering the differences between temperatures at measurements of the luminance of the display device. A monitor measures the luminance of the display screen using an optical sensor and measures the temperature around the display screen using a temperature sensor. A terminal device stores the measured luminances and temperatures in such a manner that the luminance and temperature are associated with each other. On the basis of the measured luminances and temperatures obtained by repeated measurements, the terminal device predicts the trend of changes in the luminance assuming that the temperatures at the measurements have been approximately constant, and predicts the life of the monitor on the basis of the predicted change trend.

In a centrifugal separator comprising a first and second separator part having a centrifuge rotor and rotates during operation relative to the first separator part. A space connecting the first and second separator parts houses a rotating liquid body during operation. A mechanical sealing device is provided at the space and includes a first sealing element on the first separator part having a first contact surface, and a second sealing element on the second separator part having a second contact surface. The liquid body on the first sealing element or the second sealing element and displaces the same axially so that the first and second contact surfaces are pressed against each other. A pre-tensioning element exerts force on the sealing element which acts to displace the first contact away from the second contact surfaces so that a gap is formed, forming a throttling.

A motor driving apparatus includes: a voltage detecting unit for detecting a voltage of each direct-current capacitor; a current detecting unit for detecting each current inputted to or outputted from each inverter; an commanding unit for outputting a power-converting command to each inverter after each direct-current capacitor is charged and supply of direct-current power to a converter is shut off; a current integrating unit for integrating each current detected while the power-converting command is outputted; a capacity estimating unit for calculating the estimated capacity of each direct-current capacitor based on the current integration value and the voltage of the direct-current capacitor after supply of direct-current power to the converter is shut off and before the power-converting command is outputted; and a life determining unit for determining a life of each direct-current capacitor based on the initial capacity value and the estimated capacity of the direct-current capacitor.

Provided are a portable electronic device which accurately judges service life of a battery even when the battery is replaced, and a method for controlling such portable electronic device. A control block (48) is provided with a voltage measuring section (100), which is connected to a rechargeable battery (32) and measures a voltage value of the rechargeable battery (32); and a control section (101), which measures the voltage of the rechargeable battery (32) by means of the voltage measuring section (100) each time recharging of the rechargeable battery (32) is started and ended, and controls to store recharge count information specified based on the measured voltage value in a storage section (42). The control section (101) performs prescribed information updating, based on the recharge count information, in the case where the recharge count information is acquired by means of an information acquiring section (49) which acquires the recharge count information relating to the rechargeable battery (32) from the external.

The invention provides a method for evaluating the service life of the polyolefin cable insulation material for a nuclear power station. The method comprises the following steps: firstly, carrying outirradiation crosslinking and then carrying out plate vulcanization treatment simulation to obtain a cable insulation sample for the nuclear power station. Carrying out accelerated thermo-oxidative aging treatment on the obtained sample at different temperatures for different times, and simulating a cable aging process; Meanwhile, mechanical properties, insulating properties and infrared microcosmic parameters are obtained, and the aging state is represented. According to an elongation at break method, obtaining corresponding aging end point time tau1 at different temperatures T1. And carryingout DSC non-isothermal oxidation induction test on the obtained sample by adopting different heating rates, and calculating the activation energy of the cable insulation sample by adopting a Kissigerequation. And deducing a linear equation between the service life tau2 of the cable insulation sample to be tested and the reciprocal of the absolute temperature of accelerated aging by combining anArrhenius equation. The technical problems that an existing single-factor elongation at break method for evaluating the service life of the cable is short and not accurate enough are solved.

The invention provides a memory service life test algorithm. A calculator unit is added into a memory service life test program; a rated service life upper limit is set according to a memory data manual; then, an ultimate service life upper limit being at least twice of the rated service life upper limit is set; if the number of read-write times is greater than the ultimate service life upper limit, the condition that a memory fails is judged; if the number of the read-write times does not exceed the ultimate service life upper limit, the total number of test times obtained through adding one test time number to the ultimate service life upper limit is tested; then, a storage region of the memory is continuously subjected to read-write operation; data, with the fixed lengths, written in each time is different; the total number of operation times, the total number of write-in error times and the total number of read error times are recorded; after the test on the total number of test times is completed, whether the number of read-write error times exceeds 60 percent of the total number of test times or not is judged; if so, the condition that the memory fails is judged; and if not, the condition that the memory does not fail is judged. The invention provides the reliable and powerful basis for mass cargo supply memory service life inspection, electric energy meter data reliability test and meter storage algorithms.