90 results about "Eye height" patented technology

A method for calibration of memory circuits is provided that adjusts memory circuit output parameters based on data eye measurements. Data eye patterns from the memory circuit outputs are measured by the memory controller for different settings of the memory circuit output parameters. Memory circuit output parameters can be adjusted to settings that correspond to widest average data eye widths, highest average data eye heights, or other suitable criteria.

The invention discloses a method and system for detecting the fatigue driving of a driver, and belongs to the technical field of image processing and pattern recognition. The method comprises the steps: collecting a head image of the driver; positioning an eye area of the driver; processing a positioned eye image, and obtaining the contour of an eye; calculating the eye height according to the obtained contour of the eye, and obtaining the opening degree of the eye; Judging whether the driver is fatigued or not according to the comparison of the opening degree of the eye with a set threshold value; and giving an alarm for the reminding of the driver when the driver is fatigued. The method and system can detect whether the driver is fatigued or not under the condition of difference light intensities and the condition that the driver wears sunglasses, obtain more accurate detection results, and achieves the effective prompt and warning for the driver against the fatigue driving.

Circuitry for receiving a serial data signal (e.g., a high-speed serial data signal) includes adjustable equalizer circuitry for producing an equalized version of the serial data signal. The equalizer circuitry may include controllably variable DC gain and controllably variable AC gain. The circuitry may further include eye height and eye width monitor circuitry for respectively producing first and second output signals indicative of the height and width of the eye of the equalized version. The first output signal may be used in control of the DC gain of the equalizer circuitry, and the second output signal may be used in control of the AC gain of the equalizer circuitry.

A method comprises selecting a starting point on a map of equalization coefficients and measuring an eye height of a signal transmitted using the set of equalization coefficients associated with the starting point and an eye height associated with each adjacent point on the map relative to the starting point. The eye height associated with an adjacent point is based on a signal transmitted using the set of equalization coefficients associated with the adjacent point. The method also comprises walking on the map in a first direction from the starting point to the adjacent point associated with the greatest eye height, wherein the eye height associated with the adjacent point is greater than or equal to the eye height associated with the starting point.

A vehicle safety device includes a seat mounted within a passenger compartment of the vehicle, in which the seat is movably connected to a vehicle frame by a seat position adjusting mechanism that allows the seat to move along an axis between a forward-most position and a rearward-most position. An air-bag is mounted within the passenger compartment in front of the forward-most position of the seat, with the forward-most position of the seat defined as a position of the seat in which a distance between a passenger seated in the seat and the air-bag is equal to a minimum safe clearance. In addition, an exemplary method of maintaining a minimum safe clearance between an air-bag mounted in a vehicle and a vehicle passenger includes the steps of preventing motion of a seat toward the air-bag beyond a forward-most position, in which, when in the forward-most position, a passenger seated in the seat is separated from the air-bag by a predetermined minimum safe clearance, and providing a position adjusting mechanism for at least one vehicle control pedal to allow a passenger seated in the seat to adjust a distance between the seat and the at least one pedal by moving the at least one pedal toward and away from the seat. An automatic seat positioning system, which takes into account both seat to air-bag distance and eye height and automatically, may be used to optimally and automatically position a passenger to maximize safety and comfort.

The invention discloses a test method and system for testing an internal eye diagram of a chip. The method comprises the following steps: S1, erecting a test platform and inputting a reference voltagesignal and a clock signal at a to-be-tested chip receiving end to obtain a sampling point; S2, adjusting a clock signal phase and a reference voltage signal to change the location of the sampling point, and testing the obtained sampling point to obtain a boundary sampling point with an error code; S3, repeated the previous step to obtain a plurality of boundary sampling points, connecting the boundary sampling points to form a boundary contour of an internal signal of the chip so as to obtain eye height and eye width data and a signal simulation eye diagram; and S4, compensating the referencevoltage signal and the clock signal and determining the compensated eye height and eye width data to obtain a final internal signal eye diagram of the chip. According to the invention, with internalsimulation testing, parameter adjustment becomes convenient; the consistency of the testing result and the internal actual signal of the chip is ensured; and the precision of the chip signal eye diagram result is improved.

The embodiment of the invention provides a pulse amplitude modulation PAM-N signal optical performance monitoring method and device and belongs to the technical field of mobile communication. The method comprises the steps of extracting target features of a PAM-N signal from an eye diagram according to the eye diagram of the obtained PAM-N signal, wherein the target features comprise the maximum voltage value, the minimum voltage value, a Q value, N standard levels, eye height, cross point amplitude and mean square root jitter; and inputting the target features into a preset target neural network model and monitoring output target performance indexes, wherein the output target performance indexes comprise chromatic dispersion, an optical signal noise ratio and polarization mode dispersion,and according to the target neural network model, first quantity of eye diagram data of the PAM-N signal is obtained as a training set, a neural network model is trained through utilization of the training set and the trained model is obtained. According to the scheme provided by the embodiment of the invention, the PAM-N signal optical performance is monitored.

A printed circuit board layout method includes the following steps. A printed circuit board with a signal layer and a pair of differential transmission lines positioned on the signal layer is provided. A first distance is determined; when the distance between the pair of differential transmission lines is greater than the first distance, an eye width and an eye height of an eye diagram nearly remains the same. When a distance between the pair of differential transmission lines is less than the first distance, an eye width and an eye height of an eye diagram decreases. A second distance that is less than the first distance is set between the pair of differential transmission lines which makes the eye width and the eye height greater than a predetermined value, and which is determined by a Far End Crosstalk (FEXT) on the eye diagram when the pair differential transmission lines transmit signals.

The invention discloses a method for detecting fatigue of a driver wearing glasses. The method comprises the following steps: positioning human eyes based on positioning of a human face, and finding out a method for positioning eyes insensitive to interference in the process of positioning human eyes in terms of interference of an optical frame and other factors; extracting eye height by adopting a proper processing mode according to characteristics of the image, and calculating the opening degree; and determining the fatigue state of the driver. By adopting the method, according to the situation of the driver wearing glasses, the radial symmetry of strong iris and pupil but weak optical frame is utilized, and the interference of the optical frame is reduced as much as possible when the eyes are positioned; and corresponding measures are adopted according to night, sunglasses transmitted by infrared ray and other situations, the eye height can be effectively calculated, the opening degree of eyes is calculated, and the fatigue of the driver can be correctly determined.

The invention discloses a detection method and system for the rapid PCIE3.0 signal integrity. The detection method includes the following steps that a test platform with the waveform detection function is built; a test fixture is inserted into a detected PCIE slot, and two pieces of PCIE 3.0 waveform data are grasped through the test platform; the obtained two pieces of PCIE 3.0 waveform data are test and analyzed, and test result data is obtained; judgment is carried out according to the test result data, and if the test result is Pass, a test is passed; if the result is Fail, the test result data is analyzed, failure processing is carried out, and then the test is carried out again till the test is passed. According to the detection method and system, the PCIE industry standard serves as the basis, the electrical characteristic standard of a TX signal of a PCIE controller end is clear, and comprises parameters such as the transmission rate, jittering, the eye height and the eye width of the signal, so that the PCIE signal output quality of a server main board is guaranteed, and the whole operating performance of the server is improved.

The present invention provides a clock data recovery circuit, and an adaptive regulation module and method. The clock data recovery circuit comprises: a sampling module; a phase discriminator configured to obtain edge sampling signals and data sampling signal phase information; a charge pump; a voltage-controlled oscillator; a frequency divider; and an adaptive regulation module configured to automatically regulate a threshold voltage and clock sampling signals. A threshold value boundary is regulated according to the error rate of a reference sampling point, and an upper boundary and a lowerboundary of the threshold value boundary and the height of eye of a current eye pattern are determined; through comparison of the updated eye height and a previous eye height, the sampling clock movement direction is regulated to determine the sampling clock corresponding to an optimal sampling point. The clock data recovery circuit, and the adaptive regulation module and method can monitor the eye height information of input data in real time and adaptively change the phase and the threshold value voltage of the sampling clock to obtain a sampling point with the highest signal to noise ratioand a threshold value voltage so as to reduce the error rate of the clock data recovery circuit, and employ the monotonous and smooth features of the eye graph so as to greatly save the operation timeof the algorithm through adoption of a single comparison method.

Methods and systems for conditioning wireline communications to remove intersymbol interference are provided that used adaptive equalization. The method and systems include using a digital finite state machine to control two feedback loops that adjust the gain and power of the input signal relative to a supplied reference. The eye height of the input signal is conditioned by a gain feedback loop so that signal equalization can be performed in a known state. The digital finite state machine allows the loops to be flexibly run in sequence or concurrently. The adaptation functions can be shut off when adequate signal equalization has been achieve, thus saving power.

A refrigerator comprises: a body having a storage chamber; a door for selectively shielding the storage chamber; a hinge coupling portion for hinge-coupling the door to the body; and a height control unit for lifting up or lowering the door by repeatedly opening and closing the door. Since the door has a controllable height by being opened and closed, a moment arm becomes longer than when using the conventional tool such as a spanner. This may allow the height of the door to be controlled by using less force. Since the height of the door is controllable at a user's eye height, the user may control the height of the door more rapidly and precisely without errors.

The present invention discloses a self-service type binocular iris registration method and an iris registration device based on the method. The method comprises the steps of S1, detecting the distance information of a user; S2, acquiring the first face image and the ID card information of the user, and conducting the face recognition based on the first face image and the ID card information of the user; S3, according to the eye height information in the first face image and the distance information, acquiring the iris image and the second face image of the user; S4, conducting the face recognition based on the first face image and the second face image; if the results of the above two face recognition processes belong to the same user, storing the iris image in a database so as to complete the binocular iris registration process. According to the technical scheme of the invention, whether the basis information input by a user and the acquired iris image belong to the same person or not can be judged. Therefore, the substitution phenomenon of people during the iris registration process can be avoided. The accuracy of the subsequent personal identity verification is ensured.

The invention provides a terminating resistance matching circuit of a differential interface circuit and a terminating resistance matching method. In order to improve the data quality of the differential interface circuit in the communication process, a data detection circuit and an adjustable resistance network are additionally arranged in a transmitter chip, and automatic calibration and adjustment are carried out on a terminating resistance value through a control circuit after data detection. Eye height parameters in a data eye diagram can be automatically improved in real time, the data quality is improved, and the reliability of data analysis is improved; at the same time, the problem of terminating mismatch between transmitters completed by different designers can be reduced.

A vehicle safety device includes a seat mounted within a passenger compartment of the vehicle, in which the seat is movably connected to a vehicle frame by a seat position adjusting mechanism that allows the seat to move along an axis between a forward-most position and a rearward-most position. An air-bag is mounted within the passenger compartment in front of the forward-most position of the seat, with the forward-most position of the seat defined as a position of the seat in which a distance between a passenger seated in the seat and the air-bag is equal to a minimum safe clearance. In addition, an exemplary method of maintaining a minimum safe clearance between an air-bag mounted in a vehicle and a vehicle passenger includes the steps of preventing motion of a seat toward the air-bag beyond a forward-most position, in which, when in the forward-most position, a passenger seated in the seat is separated from the air-bag by a predetermined minimum safe clearance, and providing a position adjusting mechanism for at least one vehicle control pedal to allow a passenger seated in the seat to adjust a distance between the seat and the at least one pedal by moving the at least one pedal toward and away from the seat. An automatic seat positioning system, which takes into account both seat to air-bag distance and eye height and automatically, may be used to optimally and automatically position a passenger to maximize safety and comfort.

The invention provides an interface signal quality testing method and an interface signal quality testing system based on a special chip. The method comprises a first step of obtaining signal eye pattern templates corresponding to all physical interfaces on the special chip, a second step of selecting the physical interfaces of the special chip one by one as an object to be tested, starting a signal collecting function of the special chip to collect a plurality of sets of eye height and eye width data corresponding to different time on the physical interface, and drawing a signal eye pattern corresponding to the physical interface according to the plurality of sets of the eye height and eye width data, and a third step of comparing the signal eye pattern of the tested physical interface with the corresponding signal eye pattern template and judging whether a track of the signal eye pattern of the physical interface is located on the outer periphery of the corresponding eye pattern template, wherein signal quality is up to predetermined requirements if the track of the signal eye pattern of the physical interface is located on the outer periphery of the corresponding eye pattern template and the signal quality is not up to the predetermined requirements if not. The interface signal quality testing system does not need to depend on a signal analyzer or participation of workers, and is high in accuracy, low in cost and capable of meeting testing requirements during mass production of switching equipment.

The invention discloses an equalization coefficient search algorithm. A method comprises selecting a starting point on a map of equalization coefficients and measuring an eye height of a signal transmitted using the set of equalization coefficients associated with the starting point and an eye height associated with each adjacent point on the map relative to the starting point. The eye height associated with an adjacent point is based on a signal transmitted using the set of equalization coefficients associated with the adjacent point. The method also comprises walking on the map in a first direction from the starting point to the adjacent point associated with the greatest eye height, wherein the eye height associated with the adjacent point is greater than or equal to the eye height associated with the starting point.

In one aspect, the present invention provides a system and method for selecting precursor equalizer coefficients and a serializer deserializer (SERDES) incorporating the system or the method. In one embodiment, the system includes: (1) a cost definer configured to generate an eye height cost function based on continuous-time channel and crosstalk symbol responses pertaining to a particular serial link and (2) a cost evaluator associated with the cost definer and configured to evaluate the eye height cost function based on a particular criterion thereby to produce coefficients for a precursor equalizer to be applied with respect to the particular serial link.

The invention discloses an ophthalmic eye examination device. The eye examination device comprises a base, a first side plate and a second side plate, the base is horizontally arranged, a lifting assembly used for supporting a jaw is fixed to the middle of the front portion of the top face of the base, and the first side plate and the second side plate are vertically fixed to the two sides of therear portion of the top face of the base in the longitudinal direction respectively. The examination device has the beneficial effects that the jaw of a patient is supported by a supporting plate of the lifting assembly, then the position height of examination lens bodies is driven to adapt to the eye height of the patient in the mode that a vertical moving assembly vertically slides along an adjusting groove and a guide groove and is locked, then the two examination lens bodies are driven to adjust the distance between the two examination lens bodies to adapt to the distance between the two eyes of the paint in the mode that a transverse moving assembly slides along a transverse sliding groove and is locked, so that adaptive adjustment of the positions of the examination lens bodies according to actual distribution of the eyes of the patient is rapidly completed, and the use flexibility of the device is improved.

Circuitry for receiving a serial data signal (e.g., a high-speed serial data signal) includes adjustable equalizer circuitry for producing an equalized version of the serial data signal. The equalizer circuitry may include controllably variable DC gain and controllably variable AC gain. The circuitry may further include eye height and eye width monitor circuitry for respectively producing first and second output signals indicative of the height and width of the eye of the equalized version. The first output signal may be used in control of the DC gain of the equalizer circuitry, and the second output signal may be used in control of the AC gain of the equalizer circuitry.

The invention provides a pre-emphasis coefficient test method and device and a communication device. The communication device comprises a medium access control chip and a physical layer chip. The method comprises the steps of taking one of the medium access control chip and the physical layer chip as a sender, taking the other as a receiver, and controlling the sender to send an eye diagram test signal to the receiver; controlling the sender to carry out high frequency component compensation on the sent eye diagram test signal through adoption of a plurality of different pre-emphasis coefficients in sequence; for each pre-emphasis coefficient, obtaining an eye height value of an eye diagram generated by the receiver according to the eye diagram test signal; and taking the pre-emphasis coefficient corresponding to the obtained highest eye height value as the optimal pre-emphasis coefficient, and sending the signal to the receiver through adoption of the optimal pre-emphasis coefficient.The pre-emphasis coefficient with relatively high transmission quality can be screened out relatively accurately and rapidly, and the signal transmission reliability between the medium access controlchip and the physical layer chip can be improved.

A printed circuit board layout method includes the following steps. A printed circuit board with a signal layer and a pair of differential transmission lines positioned on the signal layer is provided. A first distance is determined; when the distance between the pair of differential transmission lines is greater than the first distance, an eye width and an eye height of an eye diagram nearly remains the same. When a distance between the pair of differential transmission lines is less than the first distance, an eye width and an eye height of an eye diagram decreases. A second distance that is less than the first distance is set between the pair of differential transmission lines which makes the eye width and the eye height greater than a predetermined value, and which is determined by a Far End Crosstalk (FEXT) on the eye diagram when the pair differential transmission lines transmit signals.

The present invention discloses a geometric graphing method for graphing vertical stadia envelope curves of concave vertical curves. The geometric graphing method comprises: summarizing completed longitudinal-section results; obtaining an eye-height line and an object-height line; selecting a stake mark of a start point; according to the Code for Design of Urban Road Engineering, deviating a perpendicular line of the stake mark of the start point from a first intersection point according to a set stadia length, enabling the deviated perpendicular line to intersect with the object-height line to obtain a second intersection point; connecting the first intersection point with the second intersection point through a straight line segment, wherein the straight line segment is a traveling stadia line of the stake mark of the start point; successively obtaining the stadia line corresponding to each set of stake marks according to precision requirements; graphing the stadia enveloping curve; and inserting a control object of the corresponding proportion according to the designed stake marks to visually reflect whether the control object shields the traveling stadia line. The geometric graphing method provided by the present invention is high in operability and applicability. The longitudinal sections of all positions under different traffic organization manners are precisely controlled, so that the engineering design is more flexible, convenient and economic, which is favorable for the popularization and the application of graphing stadia enveloping diagrams as an engineering design method.

A system, program product, and method comprising the steps for: superimposing or plotting the signal trace data on a multilevel Pulse Amplitude Modulation (PAMn) eye diagram; identifying at least three (3) transition states of the signal trace; determining an eye height (EH) and / or eye width (EW) of an eye opening of the signal trace; finding an optimal central axis of the signal trace eye opening; plotting a diamond shaped inner mask within the signal trace eye opening; and applying a mask test on said PAMn eye diagram.

An eye detection method for detecting a degree of eye opening and closure of a testee includes detecting a location of an eye pupil, a location of an inner eye corner and a location of an outer eye corner of an eye of the testee; calculating an eye width according to the location of the inner eye corner and the location of the outer eye corner; multiplying the eye width by a specific ratio to obtain an eye height; generating a region of interest with a center on the location of the eye pupil, a length equal to the eye width, and a width equal to the eye height; and determining a ratio of the eye occupying a detection area in the region of interest, and determining the degree of eye opening and closure of the testee accordingly.

A method of testing a device comprises receiving signals from a device under test (DUT) and computing an eye diagram using the signals received from the DUT. The method also comprises comparing an eye height and an eye width of the eye diagram to a predetermined values of a threshold eye height and a threshold eye width. Further, responsive to a determination of the eye height and the eye width exceeding the predetermined values of the threshold eye height and the threshold eye width, flagging the DUT as passing.

The invention discloses a signal testing method, which comprises the following steps: starting a script program to control a CPU (Central Processing Unit) of a corresponding board card, so that the power consumption of the CPU is dynamically changed; carrying out sending end test and receiving end test on the board card in the current CPU state, and obtaining a corresponding first test result, wherein the first test result comprises eye height test data and eye width test data. The power consumption of the CPU is controlled to dynamically change by using the script program, namely, a test environment of the dynamic noise of the power supply is provided for the board card signal, the first test result obtained in the test environment can obviously reflect the influence of the dynamic noiseof the power supply on the signal quality, and a reliable basis is provided for product quality and design optimization. Correspondingly, the invention further discloses a signal testing system and device with the same beneficial effects and a readable storage medium.

The invention discloses a self-adaptive system and method for a rearview mirror of a vehicle. The system comprises a height acquisition unit, a position acquisition unit and an angle adjustment unit,wherein the height acquisition unit is used for acquiring the eye height of a driver on a seat; the position acquisition unit is used for acquiring the moving space range of eyes of the driver in thevehicle according to position information of the seat and the eye height; the angle adjustment unit is used for determining a first angle required to be spread of a rearview mirror when the vehicle drives straight and then adjusting the rearview mirror to the position where the first angle is located, wherein the first angle is the angle of the initial position during folding relative to the rearview mirror. The angle of the rearview mirror can be self-adaptively adjusted according to the position of the driver in a cab, so that the demands of body types of different drivers for the angle of the rearview mirror are met.