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406results about How to "Reduce hardware costs" patented technology

Visible light communication-based indoor positioning system and method

InactiveCN103869284AReduce hardware costsReduce overheadPosition fixationIndoor positioning systemElectricity
The invention discloses a visible light communication-based indoor positioning system and method which are designed for solving the problems of high hardware cost, more system maintenance expense and the like of the existing indoor positioning system and method. The visible light communication-based indoor positioning system comprises a transmitting terminal and a mobile receiving terminal; the transmitting terminal consists of a plurality of transmitters distributed at various places indoors; each transmitter comprises an LED (light-emitting diode) light source for using a photosignal to output the position information of the transmitter; the mobile receiving terminal is used for receiving the photosignal, transforming the photosignal into an electric signal and extracting the corresponding position information from the electric signal. The visible light communication-based indoor positioning method is used in the visible light communication-based indoor positioning system and comprises the steps that one LED light source uses one photosignal to output the position information of the LED light source; the mobile receiving terminal receives the photosignal, transforms the photosignal into the electric signal and extracts the corresponding position information from the electric signal. The visible light communication-based indoor positioning system and method have the advantages of low hardware cost, less system maintenance expense, high accuracy and the like.
Owner:BEIJING UNIV OF POSTS & TELECOMM +1

Display optimization method based on Xen safety computer

The invention provides a display optimization method based on Xen safety computer. The method comprises the following steps: simplifying the back end of a host system, customizing the front-end drive of a client system, and optimizing the communication between the front end and the back end. The step of simplifying the back end of a host system comprises is realized as follows: implementing a PCI(Peripheral Component Interconnect) equipment interface and introducing the support of Frame Buffer, and directly drawing the frame buffer image on a screen by reading and writing the Frame Buffer; the step of customizing the front-end drive of a client system is realized as follows: directly obtaining the internal storage I/O (Input/Output) and the port I/O resource provided by the back-end device, and implementing the display environment based on the Frame Buffer through the system Graphics Device Interface (GDI) display interface; and the step of optimizing the communication between the front end and the back end is realized as follows: registering an appointed I/O port in the host system by the back-end device firstly, and directly initiating the callback function implemented by the back end when the front-end drive accesses theses I/Os so as to complete the synchronous interaction of the front end and the back end; then, providing a memory space interacted with the front-end drive by the back end, mapping the memory space to the memory space of the client system, and implementing the interaction in a way of sharing the memory.
Owner:SOUTH CHINA UNIV OF TECH

Automatic LCD screen defect detection system

The invention provides an automatic LCD screen defect detection system. The system comprises two display screen movement assemblies, a camera movement assembly, an electrical control system, a computer, an alarm and a displayer, wherein the two display screen movement assemblies are arranged in parallel; each display screen movement assembly comprises a detection station and a mounting station; the camera movement assembly is horizontally arranged above the two display screen movement assemblies; when one display screen movement assembly drives an LCD screen to move to the corresponding detection station, the electrical control system controls the camera movement assembly to drive a camera to move to the corresponding detection station, meanwhile, the electrical control system controls the other display screen movement assembly to move to the corresponding mounting station, the camera acquires image information of the LCD screen and sends the information to the computer for image processing, and if the display screen has defects, the displayer displays corresponding defects, and the alarm gives an alarm. A conventional human eye detection mode can be replaced by means of the automatic LCD screen defect detection system, the human cost can be saved, and the problems of misjudgment and leak detection caused by human eye detection can be solved.
Owner:CHENGDU JOVIAN TECH EXPL

Low-cost interconnection system of mobile phone and vehicle machine

The invention discloses a low-cost interconnection system of a mobile phone and a vehicle machine. The interconnection system comprises the mobile phone and the vehicle machine, wherein the vehicle machine comprises a vehicle-mounted radio and a speaker; at least one APP program is arranged on the cell phone, the vehicle machine further comprises a Bluetooth interconnection module, a Bluetooth interconnection key and a microphone; a communication connection between the vehicle-mounted radio and the mobile phone is established through the Bluetooth interconnection module; a Bluetooth connection between the mobile phone and the vehicle-mounted radio is established to implement bidirectional control, and an audio signal output by the mobile phone is played through the speaker; the Bluetooth interconnection key is connected to the vehicle-mounted radio, the microphone is connected to the Bluetooth interconnection module, when the Bluetooth interconnection key is pressed, the microphone is connected to the mobile phone through the Bluetooth interconnection module, the microphone is used for collecting voice sent by a user, converting the voice to a control command, and transmitting the control command to the mobile phone through the Bluetooth interconnection module, and the mobile phone opens the corresponding APP program on the mobile phone based on the control command. According to the low-cost interconnection system, sharing of mobile phone hardware, vehicle machine hardware and software resources can be implemented.
Owner:CHONGQING CHANGAN AUTOMOBILE CO LTD

Outer radiation source weak signal detection method based on PCA (principal component analysis)

The invention provides an outer radiation source weak signal detection method based on PCA (principal component analysis). The method comprises the following steps of solving an autocorrelation matrix R=E{x(t)x<H>(t)} of a sampling sequence x(t); carrying out SVD (singular value decomposition) on the autocorrelation matrix R, to obtain R=Q Lambda Q<H>, utilizing the decomposed diagonal matrix Lambda and unitary matrix Q to carry out linear conversion on the sampling sequence x(t) to obtain a strength-decreased sequence y(t) of received signals; carrying out the two-dimensional correlation of time frequency distribution on the third path to the Mth path of signals in the received signal y(t) to obtain the corresponding correlation value, namely the absolute value of psi i (tao, f); when the signal-to-noise ratio of one certain path is greater than or equal to a threshold value, determining the time delay and Doppler frequency corresponding to a peak point as the time delay and Doppler frequency displacement of one target; and when the signal-to-noise ratio of one path is smaller than the threshold value, judging that the signal of the path has no target. The method has the advantage that a weak target signal can be extracted under the conditions of strong same-frequency interference and low signal-to-noise ratio.
Owner:UNIV OF ELECTRONIC SCI & TECH OF CHINA

Method and device for monitoring vehicle state and driving behavior

The invention discloses a method and a device for monitoring a vehicle state and a driving behavior. The method comprises the following steps that first data which is transmitted by a CAN bus connected with at least one set of acquisition equipment and corresponds to a set part state of a target vehicle is obtained; the first data is acquired by the at least one set of acquisition equipment; second data output by a switching amount output line of at least one set of switching equipment on the target vehicle is obtained; driving state data which is generated by a satellite positioning vehicular terminal and corresponds to the target vehicle is obtained; the first data, the second data and/or the driving state data are comprehensively analyzed according to a set algorithm, and target vehicle state information and driving behavior information are generated according to an analysis result. The technical scheme provided by the embodiment of the invention can comprehensively consider many vehicle part state parameters so as to realize identification of the vehicle state and the driving behavior; a communication module and a positioning module of the satellite positioning vehicular terminal are shared by using a splitting type structure, so that the hardware cost is reduced.
Owner:BEIJING TRANSILINK INFORMATION TECH

Multi-angle dynamic light scattering particle size distribution measuring device and method

ActiveCN105891063AReduce hardware costsAvoid probing bias issuesParticle size analysisScattered lightTime variable
The invention discloses a multi-angle dynamic light scattering particle size distribution measuring device and method. The device comprises a laser device, a colorimetric dish, a rotary displacement table, a receiving module, a photon counter and a computing and processing module, wherein the colorimetric dish is used for containing nano-particle suspension liquid to be measured, the rotary displacement table is provided with an outer disc and an inner disc, the receiving module is located on the outer disc, rotates around the rotating axis with the outer disc and is used for receiving light scattered by the nano-particle suspension liquid to be measured at different angles, the photon counter is used for recording the information about the time-variable light intensity of the scattered light received by the receiving module at different angles, and the computing and processing module is used for computing the particle size distribution of nano-particles in the nano-particle suspension liquid to be measured according to the received scattered light and recorded time-variable light intensity information. The detecting deviation problem existing when different-angle dynamic light scattering information is detected by using multiple detectors is avoided, and the multi-angle dynamic light scattering particle size distribution measuring device is good in stability and high in measuring accuracy.
Owner:HUAZHONG UNIV OF SCI & TECH

Automatically-aligned numerical control cutting method for pre-printed image plate

The invention discloses an automatically-aligned numerical control cutting method for a pre-printed image plate, which comprises the following steps of: A, extracting the profile of an image to be printed, and generating an initial numerical control machining code according to the extracted image; B, adding more than two identical identifying images at the blank of the periphery of the image to be printed; C, printing the image to be printed with the identifying images on the plate; D, clamping the pre-printed image plate obtained by the step C on a workbench of a numerical control cutting machine, and identifying the positions of the identifying images on a machine tool through a camera fixed on a main shaft of the numerical control cutting machine so as to establish the relation of conversion of coordinates between an image coordinate system and a cutting machine coordinate system; and E, editing the initial numerical control machining code obtained by the step A according to the relation of the conversion of coordinates obtained by the step D to obtain a directly-positioned numerical control machining code, so that the numerical control cutting machine cuts according to the obtained numerical control machining code. The automatically-aligned numerical control cutting method has the advantages of low hardware cost, simple and convenient operation and high alignment accuracy.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

System and method for realizing multi-card multi-standby mobile phone function by virtual method

The invention provides a system and method for realizing a multi-card multi-standby mobile phone function by a virtual method. The system comprises a mobile phone body with a single subscriber identity module (SIM) card slot, a software detection module and a memory module, wherein the SIM card slot supports insertion of one or more external SIM cards; the software detection module is used for detecting the system information of the inserted SIM card, and duplicating the system information of the SIM card to the corresponding memory module; and the memory module divides the SIM card to the corresponding memory module on the basis of the system information of the SIM card detected by the software detection module, and is used for storing subsequent communication information generated on the basis of the SIM card. By utilizing he system and method provided by the invention, the technical problem that the requirement of increasing the multi-card function and the requirement of restricting the appearance volume are contradictory; the multi-card multi-standby mobile phone function is realized by the virtual method, the space volume of the mobile phone is saved to assist a mobile phone designer to better complete structure stack and ensure the multi-card multi-standby mobile phone to be thinner and smarter, and mobile phone manufacturers can save hardware cost of multiple card slots.
Owner:SHENZHEN SANG FEI CONSUMER COMM CO LTD

Current detection device and method

The invention discloses current detection device and method. The device comprises a voltage detection circuit, an operational amplifier circuit and a microprocessor, wherein the voltage detection circuit is used for detecting voltage at two ends of each of at least three metal oxide semiconductor field effect transistors (MOSFETs) in a power inverter circuit of a driver; the operational amplifier circuit is used for respectively obtaining breakover current of a corresponding bridge arm of the power inverter circuit according to the voltage and the conduction resistance of each MOSFET and also for providing the sampled current obtained after amplification treatment to the microprocessor; the microprocessor is used for carrying out analog-to-digital conversion on the sampled current and then carrying out current reconstruction on the sampled current subjected to analog-to-digital conversion according to the space vector pulse width modulation (SVPWM) sector, so as to obtain at least three phases of output phase current of the driver. By adopting the current detection device and method, the current is detected by an inherent inverse MOSFET bridge arm, so that the hardware cost is saved, meanwhile, the same performance as the current sensor can be achieved, and the detection device has excellent cost advantage for a low-voltage vehicle driver and also has the beneficial effects of small power consumption, easy accomplishment of printed board layout and the like.
Owner:SHENZHEN HOPEWIND ELECTRIC CO LTD
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