1074 results about "Signal variation" patented technology

Embodiments in accordance with the invention provide communication between vehicles and traffic control devices and/or other vehicles. The communication system provides for communication of system variables such as: signal setting (e.g., red/yellow/green light), signal direction, time to signal change, signal sequence (e.g., next traffic flow), red light runner alert, signal failure, driver urgency, vehicle presence, absolute vehicle location, toll collection information, vehicle speed, roadway condition (e.g., ice on bridge surface), traffic impairments (e.g., delay ahead). The communication system also provides for communication of system variables such as: speed, acceleration/deceleration, braking, lane change with direction, malfunction (e.g., stall). The system communicates utilizing wireless optical, acoustic and/or radio frequency signaling methods.

A capacitive touch panel and a display device using the capacitive touch panel are provided. The capacitive touch panel includes a first electrode layer, a second electrode layer, and a dielectric layer disposed between two layers. The first electrode layer has a plurality of first A electrode strings and first B electrode strings extended along a first direction. The first A electrode string and the first B electrode string respectively has a plurality of first direction electrodes. The second electrode layer has a plurality of second direction electrodes connected in series along a second direction. The first A and B electrode strings are disconnected in the first electrode layer while they are simultaneously detected for presence of signal variation.

In large arrays of image sensing devices, like CCDs, a small number of defective image elements (pixels) must be tolerated and the resulting image degradation should be eliminated through bad pixel correction. The disclosed invention provides a mechanism to effectively detect defective pixels “on the fly” in a Bayer RGB type color image sensor, optimized for low cost applications. It calculates a variable threshold based on signal changes on nearby pixels of the same color within a single row and checks if the signal change of the pixel under test exceeds said variable threshold. It further performs a plausibility check using nearby pixels of an other color in the same row.

A touch panel device includes: an electrostatic capacitance touch panel of mutual capacitance type which includes transmission-side electrodes and reception-side electrodes; a detecting unit which detects a contact with the electrostatic touch panel and outputs contact information; and a detection signal variation calculating unit which calculates and outputs detection signal variations of the transmission-side electrodes and the reception-side electrodes based on the contact information. The touch panel device further includes: a variation distribution calculating unit which calculates and outputs a variation distribution of the detection signals based on the detection signal variations; and a determining unit which determines that an object contacting the electrostatic touch panel is a drop of water when a peak value of the variation distribution of the detection signals is a predetermined negative threshold or less.

The invention discloses a multi-point recognition method of an infrared touch screen, which comprises steps as follows: a system performs vertical scanning to determine whether an object's coordinate is acquired or not, an identification number is created for the seized object while the coordinate value of the object is recorded so as to determine whether more than one object's coordinate is existed or not, serial-number ranges of receiving tubes on an X axis and a Y axis where signals are changed abnormally are taken to create overlap regions on the X axis and the Y axis for each object, coordinates of the overlap regions on the X axis and the Y axis are compared in groups of every two objects so as to conform crossed areas of the overlap regions on the X axis and/or the Y axis, then the crossed areas are progressively scanned out of the vertical, actual coordinate values of the objects are output according to the signal variation of the receiving tubes, and finally the overlap regions of all the objects are compared. The invention has the advantages that the invention can automatically select a target region to scan via multiple angles, thereby shortening the required time of multi-point scanning, increasing the accuracy of scanning, and realizing the quick recognition of multi-point moving objects.

A system for decoding a video bitstream includes receiving a bitstream and a plurality of enhancement bitstreams together with receiving a video parameter set and a video parameter set extension. The system also receives an output layer set change message including information indicating a change in at least one output layer set.

A voltage level shifting circuit (10) transitions an input signal at a first voltage to a second voltage higher than the first voltage. A cross-coupled latch provides the second voltage. Cascode configured transistors (16, 26) are connected in series with input transistors (18, 28) that receive the first voltage in complementary form. Capacitive devices (34, 40) are connected between the first voltage and gates of the cascode configured transistors for allowing independent small signal variations to occur on the gates of the cascode configured transistors for better control of duty cycle and rise and fall time matching of the level shifting circuit. Isolation devices (32, 38) permit independent modification of small signal voltages to occur on the gates of the cascode configured transistors.

The invention discloses an indoor passive positioning method based on channel state information and a support vector machine. The method comprises the following steps: firstly preprocessing the acquired channel state information data, performing de-noising and smoothness through the adoption of a density-based spatial clustering of applications with noise and a weight-based moving average algorithm, and then using the principal component analysis algorithm to extract the features. The data after the preprocessing and feature-extracting can reflect the signal change more accurately and the dimension is greatly reduced. The passive positioning adopts two-stage positioning. In the training stage, the large positioning space is divided into sub-regions, the support vector machine classification and regression model is established for each sub-region so as to acquire a statistic model for accurately representing the nonlinear relationship between the position and the signal. The two-stage positioning firstly determines the sub-regions through the classification of the support vector machine, and the precision position is determined in the sub-region through the regression of the support vector machine. The method disclosed by the invention has the beneficial effects that the passive positioning can be performed in the absence of the active participation of the target, and the indoor positioning precision is improved to sub-meter level.

An apparatus and method for controlling bias in an optical modulator is disclosed. The method is particularly applicable to controlling multi-wavelength modulators and wavelength-tunable transmitters. At a calibration stage, a desired optical performance of the modulator is achieved, and an amplitude of a peak-to-peak variation of the output optical signal at a pre-determined amount of dither is stored in a memory as a reference. At operating stage, a controller of the optical modulator adjusts a bias voltage of the modulator until the measured peak-to-peak optical signal variation matches the reference value stored at the calibration stage. For multi-wavelength modulators and tunable transmitters, the calibration is repeated at each wavelength, and corresponding peak-to-peak optical signal variations are stored in the memory.

A method of analyzing the type of tissue of a body portion of a subject. The method includes applying an excitation signal to the subject, sensing electrical signals from the subject responsive to the excitation signal, determining a stationary impedance map of the body portion responsive to the sensed signals, determining a change waveform of at least a part of the stationary impedance map, and providing an indication on a tissue type of at least part of the body portion, responsive to the change waveform.

The invention relates to a generating set sub-synchronous oscillation suppression method adopting a full-controlled variable current device. The method uses the variable quantity of a rotating speed signal of a generating set as a control quantity, and performs filter, phase shift, proportional amplification and operation processing on the variable quantity of the rotating speed signal to acquire a control signal for controlling a variable current power unit by using a voltage synchronization signal as standard, then the full-controlled variable current device generates a sub-synchronous model modulation current, and the current affects the rotating speed of the generating set through a power transmission unit so as to achieve the aim of suppressing the sub-synchronous oscillation of the generating set. A controller comprises a plurality of signal processing subunits and a main control subunit, wherein each signal processing subunit comprises a filter module, a phase shift module, a proportional amplification module and an operation module; and the main control subunit accomplishes the control for the full-controlled device. The method can effectively suppress the sub-synchronous oscillation problem of a power grid system, has high response speed and high tracing precision, and can greatly improve the stability and reliability of a power grid.

An optical transmission system for compensating for transmission loss includes a transmitting apparatus for serializing a plurality of n (n is a natural number)-bit channel data received from the outside in response to a predetermined clock signal, converting the serialized channel data and the predetermined clock signal into a current signal whose magnitude changes corresponding to an error detection signal, and outputting optical signals having optical output power corresponding to the magnitude of the current signal, a first optical fiber for transmitting the optical signals, a receiving apparatus for recovering the n-bit channel data and the predetermined clock signal from the optical signals received through the first optical fiber, detecting transmission loss generated when the optical signals are transmitted and received, optically converting the transmission loss, and outputting the optically converted transmission loss as the error detection signal, and a second optical fiber for transmitting the optical converted error detection signal to the transmitting apparatus. Since the receiving apparatus and the transmitting apparatus forms a closed loop, it is possible to keep optical efficiency uniform, corresponding to the transmission loss transmitted by the receiving apparatus. Also, the parallel/serial data converter is realized by the gate, it is possible to convert data at high speeds of greater than the GHz level and to reduce the size of the circuit. Also, it is possible to reduce power consumption since the non-overlapping clock signals whose frequencies are relatively low are used even when data is converted at high speeds greater than the GHz level.

The invention discloses a gait counting method and a gait counter. The gait counter can be worn on a wrist or other parts of a body and is used for precisely counting different kinds of gaits of a wearer. The gait counting method comprises the following steps: analyzing an output signal of an acceleration sensor so as to generate two groups of dynamic threshold parameters and a group of dynamic time parameters; when an acceleration output signal change value is greater than a first threshold parameter and spans downwards across a second threshold parameter, performing gait counting analog; comparing the time and corresponding dynamic time parameters in two times of gait counting analog so as to confirm whether next detection is performed or not; performing wrist belt type gait counting characteristic comparison and judging; subsequently judging whether the gait counting analog meets specific counting rule parameters; judging whether the gait counting analog meets corresponding gait rule parameters so as to confirm whether the corresponding gaits need to be counted. By adopting the gait counting method and the gait counter, the wearer can wear the gait counter on the wrist or the other parts of the body to precisely count the different kinds of gaits.

The invention relates to an automatic measurement range switching device of an electronic current transformer, which comprises a current sensor, a single-pole two-throw electronic changeover switch, an A/D converter and a microprocessor. The two outputs with different transformation ratios of the current sensor are both connected with one input end of the electronic changeover switch, the output of the electronic changeover switch is converted to digital quantity through the A/D converter and then read-in by the input end of the microprocessor, and the measurement range control output end of the microprocessor is connected with the changeover control end of the electronic changeover switch. The automatic measurement range switching device provided by the invention can conduct automatic switchover according to the signal variation amplitude; and in case of low current, the A/D converter adopts large measurement input to increase signal-to-noise ratio, and in case of heavy current, the switch is switched to protecting signal input to ensure large A/D input range. Through the use of the automatic measurement range switching device, the electronic current transformer can use the same A/D channel to realize high precision and large-range measurement at the same time, so as to enhance the antijamming capability of small signals.

An accelerated roller apparatus on a handheld electronic communications device that handles urgency conditions. The device includes a manipulable mechanism that is capable of generating a manipulation-related signal. Changes in the signal occur whenever motion is imparted upon the manipulable mechanism. An urgency activity detector module generates an urgency message when the changes in the signal indicate an urgency condition. The urgency activity detector module uses the signal changes to determine the urgency condition based upon timing of successive manipulations of the manipulable mechanism satisfying a preselected timing threshold. The urgency message is then used by an application operating on the device.

A transmitted time signal carries time information encoded bit-wise by signal variations in a succession of constant duration time frames, with at least one bit in each time frame. A signal quality is determined and allocated to a respective bit, e.g. depending on the extent of deviation of an actual duration from prescribed durations of a signal variation representing the bit. Thus, a respective signal quality may be allocated to a respective decoded data bit per time frame. Successive data bits can be categorized as interference-free or interference-burdened, and a signal quality of the received time signal can alternatively be determined from the number or ratio of the interference-free bits and the interference-burdened bits. A radio-controlled clock circuit includes a receiving circuit, a bit value decoding arrangement and a signal quality evaluating arrangement.

The invention discloses an FPGA (field programmable gate array) based time-digital converter comprising a pulse signal generator, a multi-tab signal delay chain, a trigger array, a connection network, a signal change edge searching and encoding circuit and a time stamp output circuit. The pulse signal generator is triggered by a measured signal to generate a falling edge and feeds the falling edge into a signal delay chain. The trigger array is controlled by a system clock to latch tap states of the signal delay chain and transmit the tap states to the connection network. The connection network resorts and extracts the latched taps according to distribution of delay width of delay units of the signal delay chain measured in advance and transmits the tap states to the signal change edge searching and encoding circuit. The FPGA based time-digital converter has the advantages that the influence of the 0 delay unit on the signal delay chain and nonlinear error can be maximally eliminated, bubbling in thermometer code under the tap state is decreased, and performance indexes, namely measuring precision, measuring dead time and resource usage, are reasonably balanced, and a high-performance TDC (time to digital) measuring system is achieved.

The invention discloses a half-cycle repetitive controller for a position servo system. Reference signals with half-cycle symmetry are set, a half-cycle feedback link is constructed, and an ideal error dynamic is formed according to a power attraction law; and according to an ideal error dynamic equation, an e/v signal conversion module is constructed, a signal obtained by calculating through the controller is used as control input of a controlled servo object, and the position servo system changes together with the reference signals by completely eliminating half-cycle symmetrical interference signals. By the half-cycle repetitive controller, the internal memory of the controller can be obviously reduced and the periodic interference is quickly and completely suppressed under the half-cycle symmetrical reference signals, and the half-cycle repetitive controller has high cost performance.