86results about How to "Detection performance" patented technology

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 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 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.

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 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.

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 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.