86results about How to "Detection performance" patented technology

Monolithic lattice-mismatched semiconductor heterostructures are fabricated by bonding patterned substrates with alternative active-area materials formed thereon to a rigid dielectric platform and then removing the highly-defective interface areas along with the underlying substrates to produce alternative active-area regions disposed over the insulator and substantially exhausted of misfit and threading dislocations.

A static characteristic test device for radial magnetic bearings mainly comprises a loading and measuring mechanism, a tested radial magnetic bearing, rotor limiting and measuring mechanisms and a stator fixing mechanism. The static characteristic test device is characterized in that the loading and measuring mechanism comprises a locking nut, a loading screw cap, a loading screw rod, a sleeve end cap, a deep grove ball bearing, a sleeve, a small nut, a shifting rod, a thrust plate, an ergometer, a U-shaped rotor pushing rod, a loading clamp and a loading base; the tested radial magnetic bearing comprises a rotor and a stator; each rotor limiting and measuring mechanism comprises displacement sensor probes, a rotor radial shifting rod, acetal resin sheets, an upper pressure block, a U-shaped base and a U-shaped base supporting seat; the stator fixing mechanism comprises an upper V-shaped block, a pressure rod, an adjusting nut, lower half V-shaped blocks, a guide rail seat, locking nuts, pressure strips, nuts, screw rods and a base. The static characteristic test device for the radial magnetic bearings has the advantages of wide measurement range, convenience in adjustment, simplicity in operation, precision of measurement results and the like.

The present invention discloses a method and a device for detecting a primary synchronization signal and generating a sequence in a LTE system, so as to solve the problem that the overhead for 3GPP LTE system to store a local primary synchronization sequence is too much during the initial cell search process. The method for detecting a primary synchronization signal includes: directly generating a local primary synchronization signal sequence with equal amplitude in the time domain as a matched filter; performing a front-end processing for a received signal; performing the matched filtering between the received signal after the front-end processing and the local primary synchronization signal sequence; judging the output amplitude of the signal sequence obtained after the matched filtering; and then obtaining a judgment result of the local primary synchronization signal sequence.

An object detection method for vehicles, which employs at least one sensor S for cyclically detecting a vehicle's surroundings whose measured values M are projected into a freely definable grid G and are combinable into grid-based segments that can be assigned to identified objects O, and, in accordance with which, tracks for these objects O are ascertained which can be used for controlling vehicle functions. The cells Z of the grid G are designed to have incremental dimensions that differ in their incremental dimensions in the radial and / or circumferential direction in such a way that a functionally optimized object resolution is achieved.

The invention belongs to the technical field of numerical control machine tools, and particularly relates to a tool magazine and manipulator comprehensive performance detection method and platform. The tool magazine and manipulator comprehensive performance detection method comprises the steps that 1, a numerical control system is controlled to issue a tool change order through a human-computer interface, and a tool magazine starts to select tools; 2, the position precision of tool magazine movement is measured; 3, a pressure value of a cylinder in the tool chamfering process is measured; 4, a manipulator starts to rotate, and a wireless acceleration sensor starts to collect data; 5, noise of the manipulator is detected; 6, the position precision and whether tool falling exists or not are detected; 7, the vibration condition of the manipulator is detected; 8, when the manipulator is in place, whether tool falling exists or not is detected, and the position precision of the manipulator is detected through a laser displacement sensor; 9, the manipulator rotates by 90 degrees and returns to the normal position. Compared with the prior art, the tool magazine and manipulator comprehensive performance detection method and platform have the advantages of being easy to operate, high in practicability, high in precision and the like.

The present invention discloses a V-BLAST detection method for a MIMO system, including: a first detecting step for acquiring in sequence the old detection components of a transmitting symbol vector with the optimum ordering-successive interference cancellation detection method; a second detecting step for taking the detection component with the highest space diversity degree among the old detection components as a first new lo detection component, and acquiring in sequence the other new detection components of the transmitting symbol vector in an inverse order of the optimum detection order with the optimum ordering-successive interference cancellation detection method; an outputting step for outputting the first new detection component and the other new is detection components as the final detection result. The method according to the invention employs the outer close loop iteration technology to further reduce inter-layer error propagation of V-BLAST. This method has less complexity.

The invention is applied to the field of circuits and discloses a load driving circuit and an electronic load. The load driving circuit is externally connected with a power supply and a power supply to be tested. The load driving circuit comprises a voltage adjusting circuit and a load control circuit, wherein the input end and the output end of the voltage adjusting circuit are respectively connected with the power supply and the input end of the load control circuit, and the load control circuit is connected with the power supply to be tested. The load control circuit can adjust the electric parameters output by the power supply to be tested according to voltage output by the voltage adjusting circuit, so that the electronic load can finish power supply performance test on the power supply to be tested in different electric parameter work.

An RF pulse signal generation switching circuit for controlling an output of a power FET for amplifying a high frequency signal to generate an RF pulse signal that is the high frequency signal pulse formed into a pulse-wave shape is provided. The circuit includes first and third n-type FETs of which gates are inputted with a control pulse that supplies a rise timing and a fall timing of a pulse, and a second n-type FET of which a gate is connected with a drain of the first FET. A source of the first FET and a source of the third FET are grounded, respectively. The drain of the first FET is applied with a first drive voltage via a resistor. A drain of the second FET is applied with a second drive voltage. A source of the second FET is connected with a drain of the third FET and the connection point therebetween is connected with the power FET. A capacitor is connected between the connection point and an end of the resistor from which the first drive voltage is applied.

A method of servicing a hybrid system is disclosed wherein the hybrid system includes a detected fault. As a result of the detected fault the hybrid system has been disabled. The hybrid system includes a controller and a service detection interlock (SDI). The method steps include first powering up the controller and then assessing a special fault flag status. If a special fault flag is set, the next step is to check to see if the SDI is removed. If the SDI is removed then the special fault flag is cleared while the hybrid system remains disabled. The controller is then powered down with the key-off input and with the next key-on input, the hybrid system can be enabled.

A clock signal generation circuit includes a CR oscillator circuit having a capacitor, a resistor, and an amplifier circuit, and a voltage generation circuit adapted to generate a power supply voltage, and then supply the CR oscillator circuit 170 with the power supply voltage VDOS. An oscillation frequency of the CR oscillator circuit in a case in which a power supply voltage VDDL is a fixed voltage has a positive temperature characteristic. The voltage generation circuit generates the power supply voltage VDOS having a negative temperature characteristic based on a work function difference between transistors, and then supplies the power supply voltage VDOS as a power of the amplifier circuit of the CR oscillator circuit.

The use of two or more sensors tuned to the same nuclear quadrupole resonance frequency and detecting the nuclear quadrupole resonance signal results in improved signal-to-noise ratio and therefore improved nuclear quadrupole resonance detection system performance.

The invention discloses a novel spring detecting mechanism. A support is fixedly connected with a base to form an opening-shaped structural member; a grating scale is fixedly arranged on a lateral surface of the support; and a leading screw is screwed into the top part of the support. A mandrel is arranged on the base, and a grating scale moving contact support is arranged on a pressure plate. A joint and a pressure head are fixedly arranged at an upper end and a lower end of a pressure sensor respectively. A grating scale moving contact is connected with the grating scale moving contact support; a steel ball is put in a concave spherical pit at one end of the joint; the leading screw is screwed to press the steel ball so that the steel ball tightly presses a spring through the joint, the pressure sensor, the pressure head and the pressure plate; the elastic force generated by the spring is displayed by a reading device of the pressure sensor; and because the performance of the spring is determined by the elastic force generated by the spring under certain deformation, the novel spring detecting mechanism can conveniently detect the performance advantages and disadvantages of the spring.

A battery module performance detecting method for an electric car comprises the following steps of keeping the electric car to run on a slope, keeping a battery module of the electric car to discharge at a preset discharge rate which is larger than or equal to 1C, measuring the average voltage difference of a single battery in the battery module in a preset period, and setting the battery module performance as the specific value between the average voltage difference and the standard voltage difference of a standard battery module with the same type specification as the battery module. The battery module performance detecting method can guarantee the battery module to discharge at the preset discharge rate, can measure the average voltage difference of the single battery in the battery module in the preset period and can balance the performance of the battery module according to the average voltage difference of the single battery. Thus, the method can quickly detect the performance of the battery module.

An object-motion detection method includes extracting, from each of a first image representing a detection-target object and generated by an imaging unit and a second image representing the detection-target object and generated after the first image by the imaging unit, an object area including the detection-target object, obtaining, for each of the first image and the second image, a reference point indicating a boundary between a moving part of the detection-target object and a fixed part of the detection-target object, the moving part moving when the detection-target object performs a certain motion, the fixed part not moving compared to the moving part when the detection-target object performs the certain motion, and obtaining, for each of the first image and the second image, a position of the moving part of the object area in a first area locating on a side including the moving part with respect to the reference point.

The invention discloses a performance detection test stand for a main valve of a hydraulic excavator, belonging to a hydraulic system detection device. The performance detection test stand comprises an excavator hydraulic simulation unit, an electrical control unit, a leakage detection unit and a circulating cooling unit. The performance detection test stand has the advantages that the performance of the main valve of the hydraulic excavator can be detected all around through controlling actions of various units in an oil path through a control device; centralized processing of data can be realized through the control device, which is convenient for outputting a detection result; the manual control and the program automatic control of the main valve to be detected are realized through switching a control lever and an electromagnetic proportional valve; and the main valve to be detected and the detection test stand can be quickly and conveniently connected through a quick coupling.

The invention discloses a system for testing comprehensive performance of software. The system comprises a load pressure test module, a recovery performance test module, a safety performance test module, a compatible performance test module, a defect management module and a storage module, wherein the load pressure test module is used for testing the high-load running capacity of a software system; the recovery performance test module is used for testing the recovery capability of the software system after a fault appears; the safety performance test module is used for testing the safety of the software system; the compatible performance test module is used for testing the compatibility between the software system and an operating system; the defect management module is used for recording and managing defects of the software system; and the storage module is used for saving defect data of the software system. According to the invention, the system can comprehensively test the comprehensive performance of the software system to, so that the software test result is more perfect, the service performance of the software system is ensured, and after a defect is discovered, a worker can solve the problem in a targeted mode.

The invention relates to a dynamic test stand of a contact type backstop. The dynamic test stand comprises a motor, a torque-limiting coupler, a reducer, a safety coupling, a clutch, a flange coupling, a backstop, an elastic coupling, a speed regulation motor and the like; and two continuous processes of idling and reverse stop of the backstop are realized through disconnecting and connecting the clutch. The dynamic test stand not only can detect the idling test of the backstop, and can detect whether a torsional spring is reset in time or not, and whether a backstop wedge can exert functions and bear uniform stress and the like; and the dynamic test stand also can better detect the comprehensive performances of the backstop, so that the reverse stop in the actual running process of the backstop is more reliable.

The invention discloses a load separation performance test device of a separation and stripping electric connector. The load separation performance test device is composed of a mechanical separation execution unit, a loading unit, a camera shooting unit, a control unit, a fixed end fixture of the separation and stripping electric connector, a fixture mounting upright column, a stock pan and a machine body. According to the load separation performance test device, the separation performance test, including axial and variable-angle separation driving force measurement under a mechanical separation mode and separation speed and separation track measurement under a mechanical separation or an electric separation mode, of the separation and stripping electric connector under a condition of bearing given loads can be realized, a coupling relation of separation parameters under different load conditions (including loading point position and force size) is established, and images in a separation process are recorded, so that quantitative evaluation on the load separation performances of the separation and stripping electric connector is realized, and the product performance can be effectively detected.

A clock signal generation circuit includes a CR oscillator circuit having a capacitor, a resistor, and an amplifier circuit, and a voltage generation circuit adapted to generate a power supply voltage, and then supply the CR oscillator circuit 170 with the power supply voltage VDOS. An oscillation frequency of the CR oscillator circuit in a case in which a power supply voltage VDDL is a fixed voltage has a positive temperature characteristic. The voltage generation circuit generates the power supply voltage VDOS having a negative temperature characteristic based on a work function difference between transistors, and then supplies the power supply voltage VDOS as a power of the amplifier circuit of the CR oscillator circuit.

The invention relates to a brake system testing stand and more particularly to a high-precision multifunctional subway vehicle brake system testing stand and the application method thereof with the object to solving the technical problems existing in the prior art that the brake valve testing can achieve only a single function with poor universality, that the testing is targeted only to a specific valve, that the intelligent degree is low and that the overall testing accuracy is not high enough. The testing stand of the invention comprises a machine frame. The machine frame is provided therein with an industrial PC machine. The industrial PC machine is connected with a data acquisition card, a printer, and an Ethernet switch. The Ethernet switch is connected with a servo motor controller, an electromagnetic valve, a pressure sensor, an electric proportional valve, and a pressure display table through a PLC. The servo motor controller is connected with the servo motor; the electromagnetic valve is connected with an air control valve; the outer surface of the machine frame is provided with a height valve testing tool and a valve plate. The valve plate is provided with six interfaces with each interface being communicated respectively with the electromagnetic valve, the pressure sensor, the electric proportional valve, the pressure display table and the air control valve through the air channels.

A method and system for authenticating a digital optical medium, such as a CD-ROM, determine whether the medium is an unauthorized copy, or the original. The original media is created, or altered, so as to contain anomalous locations from which the transfer of data is accomplished at different rates than a standard digital copy would exhibit. One implementation of the process involves timing analysis of the differences in data transfer rates, and does not necessarily require the retrying of data reads, nor does the process require the media to exhibit fatal errors, as in conventional approaches. The process can be employed in systems that control access to unauthorized copies, or may be used for other informative purposes. Theft, distribution, and piracy of digital content on optical media, such as computer software (also games, video, audio, e-book content), is often accomplished by copying it directly to another disc using commonly available copy tools and recordable optical media, or the replication of media to another mass manufactured disc. The present invention, which helps to irrefutably identify a unit of optical media as the original, and can correspondingly identify any copy made by any currently available means as such a copy, may prevent an unauthorized individual from making use of any unauthorized copies. This offers significant advantages to content creators who wish to protect their products.

An image capturing apparatus includes an image sensor having a focus detection pixel group including a plurality of focus detection pixels that receive light passing through a part of a pupil area of an imaging lens for forming an object image and an image forming pixel group including a plurality of image forming pixels that receive light passing through the whole of the pupil area of the imaging lens; and an image processing unit that generates an image signal corresponding to the position of each of the focus detection pixels by using at least either of a signal of the focus detection pixel at the position and signals of neighboring image forming pixels of the focus detection pixel at the position, depending on the size of an aperture of the focus detection pixels.

The invention discloses a steel wire rope performance testing device for a flexible rope driven rehabilitation robot and a testing method thereof, the steel wire rope performance testing device comprises a vertical pulley module, two horizontal pulley modules, two measuring modules and two driving modules, the vertical pulley module is located in the middle, and the horizontal pulley modules, themeasuring modules and the driving modules are in mirror symmetry. The steel wire rope sequentially penetrates through the driving module, the measuring module, the horizontal pulley module and the vertical pulley module from the driving side to the horizontal pulley module, the measuring module and the driving module on the load side, and the measuring module is provided with a tension sensor component used for detecting tension of the steel wire rope and a pull rope sensor component used for detecting displacement of the steel wire rope. Influence analysis of different wrap angles of the steel wire rope and the pulley on the performance of the steel wire rope is realized by combining detection results of the sensor component. According to the invention, the reciprocating opposite-pull experiment of the steel wire rope can be completed, especially the tension and rope section displacement of the steel wire rope can be detected in real time, and the detection real-time performance and diversity are good.

A method for detecting nuclear material in an object analysed by neutron interrogation with an associated particle tube, where the method includes steps of detection of coinciding pulses by detector pixels of at least one matrix of detector pixels, where a step of detection of coinciding pulses leads to the formation of an event which reflects a fission reaction which occurs in the nuclear material, where the method includes a search for adjoining pixels amongst the pixels which have detected coinciding pulses, a grouping of adjoining pixels into groups of adjoining pixels, a count of the pixels and / or groups of adjoining pixels which have detected coinciding pulses, and a validation of the occurrence of an event provided at least three pixels and / or groups of adjoining pixels are counted.

The invention discloses a fire extinguishing system on-line detection device which comprises a power supply, an electric detonator detection circuit, a flame sensor detection and simulation circuit and an execution mechanism detection circuit. The output end of the power supply is respectively connected with the power supply input ends of the electric detonator detection circuit, the flame sensor detection and simulation circuit and the execution mechanism detection circuit. The invention further discloses a fire extinguishing system online detection method. A three-way socket is adopted to take out a flame sensor signal and an actuating mechanism action signal online, and through signal processing and standard comparison, whether burning, pressing control and other processes work normally or not is detected on line, so that whether a fire extinguishing system breaks down or not is judged. According to the invention, faults of all components and a control center of the artillery fire extinguishing system can be reliably detected, the defects of online detection means of the artillery fire extinguishing system are made up, and the method plays an important role in effectively maintaining the integrity of an artillery. The invention belongs to the technical field of artillery protection devices.

The invention relates to an LCC direct current power transmission simulation system and a field layer equipment simulation device. The LCC direct current power transmission simulation system comprises a simulation device and a real-time digital simulator. The field layer equipment simulation device comprises an industrial control computer, a field bus card and a data collection card, wherein the field bus card is inserted in the industrial control computer and is used for information interaction with a control protection device to be detected; the data collection card is inserted in the industrial control computer and is used for information interaction with the real-time digital simulator; and the field bus card is connected with the data collection card through a PCI bus. The LCC direct current power transmission simulation system and the field layer equipment simulation device take a general industrial control computer and a PCI board card as a hardware platform and contain a plurality of data communication modes, so that the flexibility of the system is improved; simulation of the LCC direct current power transmission filed layer equipment for different factories and different technical routes can be realized; accurate simulation of the filed layer equipment is realized; and the performance of the LCC direct current power transmission system can be detected more comprehensively.

The invention relates to a performance testing system for a new energy automobile motor, and the system comprises the following parts of a base and an electric dynamometer disposed thereon; a test bench, of which the straight portion is disposed on the base, and the vertical portion is provided with a circular hole; a bearing cooling device comprising an intermediate shaft, disposed on the left side of the vertical portion of the test bench and coaxial with the circular hole on the vertical portion of the test bench; a motor mounting member disposed on the left part of the straight portion ofthe test bench and abutted against the right side of the vertical portion, wherein the upper part of the motor mounting member is provided with a central hole coaxial with the bearing cooling device;a tested motor positioned and connected to the right side of the upper part of the motor mounting member, wherein the splined shaft of the tested motor is coupled to one end of the intermediate shaftin the bearing cooling device, and the other end of the intermediate shaft is coupled to the output shaft of the electric dynamometer; and a test environment device disposed at the right part of the straight portion of the test bench. The performance testing system for the new energy automobile motor provided by the invention can perform performance testing under different environments on new energy automobile motors.

The invention relates to the field of power system relay protection and discloses a method and a device for detecting a line optical difference protection ratio brake curve. The method specifically includes: putting two optical difference protection devices at a same place, connecting the same through optical fiber, setting starting current, knee point current and slope of the optical difference protection devices, starting a six-phase differential function of a relay protection tester to output three-phase current to the optical difference protection devices respectively, and using a ratio brake curve automatic drawing function of the relay protection tester for detection. The device overcomes distance and instrument limitation, does not need multiple-person cooperation and is simple andconvenient to operate, accurate in detection result and free of optical fiber channel and outside interference. The method and the device realize ratio brake characteristic detection to enable opticaldifference protection experiments to be more complete, avoid optical difference protection maloperation and ensure safe and stable running of a power grid.

A process for computing Log-Likelihood-ratios (LLR) in a detector of a wireless communication receiver, said LLR being used by a channel decoder. The process comprises the steps of:—receiving a signal from a telecom front end, said signal corresponding to data belonging to a finite set of constellation symbols, each constellation symbol being arranged in a lattice constellation impaired by an additive noise and also by a multiplicative channel; —computing a limited set of distances representative of the Euclidian distances between the received signal and a finite set of predetermined constellation symbols, possibly multiplied by the channel; —deriving a set of soft decisions or LLR from said computed set of distances under the constraint of a limited length of the list of distances, and —completing said derived LLR by clipping values read from a look-up table which is simultaneously addressed by the values of the SNR and the bit index. The invention is particularly suitable for embodying an OFDM receiver for a MIMO system.