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944results about How to "Does not affect accuracy" patented technology

Non-scene law enforcement high-speed dynamic weighing detection system and method

The invention discloses a non-scene law enforcement high-speed dynamic weighing detection system and method, and belongs to the field of traffic control. The system comprises a dynamic weighing system, a vehicle license plate recognition system, a variable message sign display system, an opposite-direction driving snapshot system and an upper computer software system. The dynamic weighing system, the vehicle license plate recognition system and the opposite-direction driving snapshot system are in signal connection with the upper computer software system; and the output end of the upper computer software system is connected with the input end of the variable message sign display system. Each vehicle is allowed to form a piece of complete vehicle pass information, comprising vehicle speed, axle load, number of axles, axle base, complete vehicle weight, license plate, speed, pass time and information about whether a vehicle overloads; if the vehicle overloads, a reminding message is sent to the variable message sign display system according to user setting to guide the vehicle to pull in to recheck; and meanwhile, the vehicle license plate information and weight information are displayed on a variable message sign, and are updated to a branch center database, thereby facilitating searching, sharing and analysis of vehicle pass records.
Owner:郑州海为电子科技有限公司

Display panel, electronic device and test method

The invention discloses a display panel, an electronic device and a test method. The display panel comprises a plurality of data lines that are arranged parallel to each other and a display array, wherein the data lines extend in a first direction, the display array comprises a plurality of pixel units that are arranged in an array manner, the pixel units and the data lines are equal in quantity, and one line of pixel units are electrically connected with a data line correspondingly; in a first direction, a test switch circuit is arranged on one side of the display array, and driving lead pins and test lead pins are arranged on the other side of the display array; the test switch circuit has a control end, an input end and an output end; the driving lead pins are electrically connected with the control end, the driving lead pins are used for inputting switch control signals, the test lead pins are used for inputting test signals, the test lead pins are electrically connected with the input end via part of the data lines, and the rest of the data lines are connected with the output end. According to a technical solution of the display panel, the electronic device and the test method, the data lines are reused as signal lines for the test lead pins, and narrow frame design can be facilitated.
Owner:WUHAN TIANMA MICRO ELECTRONICS CO LTD

Undercarriage test load loading device

The invention relates to an undercarriage test load loading device. A through hole for installing an FZ loading connector and an FX loading hole for installing an FX loading connector are formed in an upper part of a loading fake wheel; one end of an FZ loading lug is connected to the FZ loading connector, and the other end of the FZ loading lug is connected to one end of a hydraulic servo actuator cylinder; the other end of the hydraulic servo actuator cylinder is arranged on a vertical column; a shaft sleeve hole for arranging the loading fake wheel on a wheel shaft of an undercarriage and a PX loading hole for installing a PX loading lug are formed in a lower part of the loading fake wheel; a PY loading hole for installing a PY loading lug is formed in the bottom of the loading fake wheel; a chain is connected to the PY loading lug; and force sensors are arranged on the upper parts of the hydraulic servo actuator cylinder and the chain. The loading fake wheel replaces an airplane wheel so as to satisfy the loading demand of a test, a connection between the loading fake wheel and the undercarriage is consistent with a connection between a real airplane wheel and the undercarriage, the transmission path of the load is constant, the accuracy of a test result will not be affected, and the loading demands of different testes in different directions can be met.
Owner:JIANGXI HONGDU AVIATION IND GRP

On-line fingerprint authentication system and method based on bidirectional privacy protection

The invention discloses an on-line fingerprint authentication system and method based on bidirectional privacy protection. With the system and method, a problem that bidirectional privacy protection of fingerprint data of the user and fingerprint template data is not involved in the prior art can be solved. The system is composed of a trusted center (1), a fingerprint authentication server (2), and a user terminal (3). The trusted center (1) completes system initialization, provides registration and secret key distribution for a user terminal and the fingerprint authentication server, collects a user fingerprint as an authentication template, and gives authorization of the template to a legal fingerprint authentication server in a ciphertext mode; the fingerprint authentication server (2) provides an on-line encryption fingerprint authentication service with privacy protection and returns an authentication result to the user terminal; and the user terminal (3) sends an encrypted fingerprint authentication request to the fingerprint authentication server and decrypts the reply of the fingerprint authentication server to obtain an authentication result. According to the invention, bidirectional privacy protection of the user fingerprint data and the fingerprint template data is realized and a secure on-line fingerprint authentication service is provided.
Owner:陕西嵩远明瑞信息技术有限公司

Preparation method and application of visual, portable and quick mercury ion detection test paper

The invention discloses visual, portable and quick mercury ion detection test paper and a preparation method and application thereof. The preparation method of the test paper comprises the following steps: firstly preparing rhodamine hydrazide, carrying out etherification and Heck reaction on hydroxyl on filter paper so as to introduce in required isosulfocyanate radical end group, grafting the prepared rhodamine hydrazide onto the filter paper to finally obtain the mercury ion detection test paper. The prepared detection test paper has the advantages that a rhodamine derivative fluorescence probe and the filter paper are chemically bonded, the structure is firm, the reaction speed is high, the detection limit is 10mu m, the selectivity is good, the influences from other various coexisting ions are avoided, the detection environment is an organic-solution-free total aqueous solution system containing mercury ions, the pollution of other organic solvents to the environment is reduced; and under the irradiation of an ultraviolet lamp, the test paper can realize visual detection; the detection measures are convenient and can be performed on site; and therefore, the test paper and the preparation method of the test paper have great application prospect in the field of water pollution caused by mercury ions.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Analog-digital converter with sample hold and MDAC (Multiplying Digital-to-Analog Conversion) sharing capacitance and operational amplifier in time sharing way

The invention discloses a high-speed production line analog-digital converter comprising a reference voltage source, a clock generation module, a first-grade analog-digital conversion module, a sequential L-1 grade sequentially-connected analog-digital conversion module and a last-grade speed flash type analog-digital conversion module, wherein the first-grade analog-digital conversion module is merged by a sample hold module and a first-grade MDAC (Multiplying Digital-to-Analog Conversion) module; each grade analog-digital conversion module and the speed flash type analog-digital conversion module are connected with a correction and calibration module; the first-grade analog-digital conversion module comprises the sample hold module, the MDAC, an operational amplifier and a subADC (sub Analog-to-Digital Conversion) module; the clock generation module generates a four-phase nonoverlapping clock signal; and the sample hold module and the first-grade MDAC module share the OP (Operational Amplifier) in a time sharing way and also share a same capacitor in the time sharing way. The invention reduces the load capacitance of the OP of the sample hold module and the MDAC module more than 60 percent, the design difficulty and the circuit power consumption and increases the ADC speed of a production line.
Owner:余浩

Narrow-band feedback digital pre-distortion system and method

The invention discloses a narrow-band feedback digital pre-distortion system and method. The narrow-band feedback digital pre-distortion system comprises a digital pre-distorter, a digital-analog conversion module, a power amplifier, a filter, an analog-digital conversion module and a pre-distortion parameter estimation module; the input end of the digital pre-distorter is connected with a signal source while the output end of the digital pre-distorter is respectively connected with the digital-analog conversion module and the pre-distortion parameter estimation module; the output end of the digital-analog conversion module is connected with the power amplifier, and the output end of the power amplifier is respectively connected with the signal output device and the filter; the output end of the filter is connected with the pre-distortion parameter estimation module through the analog-digital conversion module; the output end of the pre-distortion parameter estimation module is connected with the digital pre-distorter. By performing filtration processing on the signals output by the power amplifier, performing digital-analog conversion and pre-distortion parameter extraction after the signal bandwidth is reduced, and performing pre-distortion adjustment by the digital pre-distorter, the linearity index of the power amplifier is guaranteed on the basis that the feedback pass bandwidth is decreased and the analog-digital conversion rate, the system power and the cost are reduced.
Owner:UNIV OF ELECTRONIC SCI & TECH OF CHINA
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