83results about How to "Fast signal processing" patented technology

An automated biomonitoring system for monitoring water quality includes an exposure chamber for housing an aquatic organism having ventilatory behavior and body movement sensitive to water quality. Electrodes capture electrical signals produced by the organism during its ventilatory behavior and body movement, and a controller responsive to signals from the electrodes determines one or more ventilatory parameters based on the signals. The ventilatory parameters are compared with corresponding thresholds to determine when the water to which the organism is exposed has caused physiological stress to the organism. The signals captured by the electrodes may be corrected for variations in water conductivity so that the signals processed by the controlled are not influenced by conductivity.

When processing a signal having a sequence of discrete values, wherein there is a first frequency range, in which the signal has a high energy, and wherein there is a second frequency range, in which the signal has a low energy, the sequence of discrete values is first manipulated to obtain a sequence of manipulated values, so that at least one of the manipulated values is non-integer. Then the sequence of manipulated values is rounded to obtain a sequence of manipulated values. The rounding is formed to effect a spectral shaping of a generated rounding error so that a spectrally shaped rounding error has a higher energy in the first frequency range than in the second frequency range. By spectrally shaping the rounding error so that the rounding error does not have any energy either in the storage areas where there is no signal energy, an especially efficient coding is obtained particularly in connection with a lossless coding context.

An automated biomonitoring system for monitoring water quality includes an exposure chamber for housing an aquatic organism having ventilatory behavior and body movement sensitive to water quality. Electrodes sense electrical signals produced by the organism during its ventilatory behavior and body movement, and a controller responsive to signals from the electrodes determines a plurality of ventilatory parameters based on the signals. The ventilatory parameters are compared with corresponding thresholds to determine when the water to which the organism is exposed has caused physiological stress to the organism.

A position detector for a scanning device includes a movable light blocker, at least two light detectors which are located behind the light blocker and which can be covered by the light blocker at different extents of coverage as the light blocker is being moved, so that the position of the light blocker can be determined, and at least one light source for emitting light onto the light detectors. A reflector is provided which is located in front of the light blocker. The light source is arranged such that the light emitted therefrom is emitted onto the reflector. Furthermore, the reflector is arranged such that the light impinging thereon is reflected onto the light detectors.

The invention discloses an ultraviolet focal plane readout circuit and method based on pixel level analog-to-digital conversion. The ultraviolet focal plane readout circuit comprises a front end electric charge integrator, a pixel level analog-to-digital conversion module, a row/column selecting control circuit, an induction amplifier and an output level buffering device, wherein the front end electric charge integrator is used for integrating a weak photo-generated current of an ultraviolet detector so as to convert the current into a voltage; the pixel level analog-to-digital conversion module can quantitatively simulate the voltage in a pixel, and a quantitative result can be latched; each unit on a focal plane can be selected by the row/column selecting control circuit; the induction amplifier inducts and amplifies the quantitative result in the pixel and sends the amplified quantitative result into an output bus; the output level buffering device is used for increasing output driving capacity of a circuit, and output signals are sequentially output in a serial mode. According to the readout circuit, signals of the ultraviolet detector are directly converted into digital signals, interference of noise to the signals is reduced by reducing a simulation signal transmission path, on-chip analog-to-digital conversion is achieved, the signal to noise ratio of an ultraviolet focal plane chip is effectively improved, and the readout circuit can be applied to detection and imaging of the weak ultraviolet signals.

A portable automated biomonitoring system for monitoring water quality includes an exposure chamber for housing an aquatic organism and a water inlet for directing water to the exposure chamber. The aquatic organism has ventilatory behavior and body movement sensitive to water quality. Electrodes sense electrical signals produced by the organism during its ventilatory behavior and body movement, and a controller responsive to signals from the electrodes determines a plurality of ventilatory parameters based on the signals. The ventilatory parameters are compared with corresponding thresholds to determine when the water to which the organism is exposed has caused physiological stress to the organism. The water being evaluated may be recirculated through the system for further analysis.

Methods, systems, apparatus and devices for a variable fiber optic delay line that includes an electro-optic modulator for receiving and modulating an input signal, a switchless discrete long time delay module for injecting a long time delay into the modulated signal to produce a long delayed signal, and a switchless analog variable short delay module injecting a variable short time delay into the long delayed signal for a delayed output signal having a delay approximately equal to the long plus the short time delay. The module may also include non-dispersive single mode fibers for transmission between components and a circulator coupled for routing the input signal to the discrete long time delay module and routing the first delayed output signal to the analog variable short delay module. The VFODL can be used for Radio Frequency, digital electrical signals requiring time delay and amplitude processing or optical signal processing.

A handling system with independent and coordinated shuttles for industrial automation, of the LSM moving coils drive type, wherein multiple shuttles with on-board coils act on a rail with permanent magnets in an independent but coordinated way, synchronous and/or asynchronous with respect to each other, with a high level of speed, precision in positioning and versatility of use. The system is particularly suitable for the automated machining of flat semi-finished products such as photovoltaic cells, printed circuits and other circuit boards or for the transport and filling of containers such as phials or flacons.

The invention discloses an FPGA-based orthogonal signal real-time high-precision processing method. The FPGA-based orthogonal signal real-time processing method adopts an orthogonal signal processing board constructed based on an FPGA, and computer measurement software. The orthogonal signal processing board and the computer measurement software realize processed data communication between upper and lower computers by means of USB data lines. The orthogonal signal processing board mainly realizes acquisition, differential preprocessing, mean filtering, error compensation, real-time phase calculation, as well as phase subdivision and direction judgment of orthogonal signals. The computer measurement software screens orthogonal signal sampled data input by the lower computer, then calculates a signal error compensation parameter through matrix operation, controls an orthogonal signal compensation program of the lower computer to operate, displays a correction effect and a measurement result on a measurement software display interface in real time, and stores relevant data. The FPGA-based orthogonal signal real-time processing method realizes the effect of compensating for orthogonal errors, amplitude fluctuations and DC drift errors of signals of a gate type sensor and a laser interferometer in real time, and provides an engineering solution for high-precision grating signal analysis and error real-time compensation.

A method and an apparatus are used for detecting optical systems, for example a sniper within a terrain. The terrain is optically scanned by means of a movable mirror and the position of the optical system is determined from a measurement made by a laser unit and is optically displayed. The position of the optical system is directly determined from the measurement made by the laser unit by evaluating the intensity of a light beam from the laser unit, after having been reflected by an optical surface of the optical system. The position is optically reflected into the field of vision of a telescope. The apparatus comprises a laser unit having a movable mirror, a control unit for detecting the position of the optical system from a measurement made by the laser unit, and a device for optically displaying the position. The device for optically displaying is a telescope, and means are provided for optically reflecting the position of the optical system into the field of vision of the telescope.

A method and system for locating a tag. The system has a first receiver configured to receive a signal from a tag. The first receiver has at least two antennas each configured to receive the signal. The system is configured to calculate a first angle of arrival of the signal at the first receiver based on a distance between a first set of two antennas of the first receiver and a time difference of arrival of the signal at the two antennas of the first set. The tag has a tag antenna that is configured to transmit signals having a wide bandwidth and has a frequency independent phase center and wherein the signal is an ultra wideband signal having one or more pulses.

A system and method for distributed dynamic strain measurement using optical fiber that is based on Brillouin optical time-domain reflectometry (BOTDR) with stimulated Brillouin scattering (SBS). A short-time Fourier transform (STFT) is used to rebuild the Brillouin frequency shift (BFS) of the SBS scattered signal to perform the dynamic strain measurement.

The invention discloses a nonlinear metasurface based four-wave mixing holographic multiplexing method, and belongs to the micro nano holographic field. The method comprises that a metasurface is composed of an array with nanometer rectangular hole structures in different geometric sizes; the geometric sizes of the nanometer rectangular hole structures are changed, so that the nonlinear metasurface can randomly regulates the amplitude and phase of an output nonlinear frequency signal; complex amplitude distribution of the nonlinear light field output in different sizes can be obtained by fullwave vector calculation; an amplitude type hologram is calculated based on an optimized GS algorithm, and a bit coding method is used to code the hologram of the rectangular hole structure; rectangular hole structure distribution is determined by coding, and the corresponding nonlinear metasurface structure array is generated; and two beams of femtosecond pulses in different frequency are input torealize nonlinear holographic space and frequency multiplexing of the same nonlinear metasurface structure array. The method can be applied to the fields including signal processing, optical storage,high-dimensional holographic anti-counterfeiting and optical encryption.

The invention discloses a cable antitheft monitoring system, which comprises a power supply, a monitoring device, a signal processing device and a feedback warning device, wherein the power supply is respectively connected with the monitoring device, the signal processing device and the feedback warning device, the output end of the monitoring device is conveyed to the input end of the signal processing device, the output end of the signal processing device is connected to the feedback warning device, and the feedback warning device is connected with a processing terminal through a wireless network. The cable antitheft monitoring system realizes the in-site and remote-distance cable antitheft monitoring, the safety factor and the work efficiency are improved, in addition, a camera can also record the real-time condition around the cable, other objects are prevented from being stolen, and the production and living safety of surrounding people is improved. The cable antitheft monitoring system is simple, reliable, economic and applicable, and is worthy of being popularized and used.

The invention discloses a space time aperture optimization method of an MIMO (Multiple Input Multiple Output) radar, belonging to the field of a radar signal processing technique. The space time aperture optimization method disclosed by the invention has the optimization scheme that the optimization ratio of the receiving array element number to the emitting array element number to the receiving array element number to the pulse number is determined through the cost function optimization receiving array element number, emitting array element number and pulse number corresponding to a ground clutter covariance matrix rank by utilizing the relation among the rank of a ground clutter covariance matrix, the radar emitting array element number, the receiving array element number and the pulse number. In the space time aperture optimization method disclosed by the invention, the radar receiving array element number, the emitting array element number and the pulse number are distributed by utilizing the ratio relation which is determined by the invention, thus the MIMO radar can obtain the highest signal processing speed.

The invention discloses a YUV and RGB color gamut conversion method based on embedded equipment, mainly comprising the steps of: establishing a color gamut conversion table, the color gamut conversion table including the mapping relation between each signal type and a conversion index value; when a signal is inputted into embedded equipment, recognizing the format, resolution ratio and color gamut space of a received signal; if the color gamut space is a YUV color gamut space, recognizing a signal type according to the format and resolution ratio; according to a recognition result, searching for a corresponding conversion index value in the color gamut conversion table, and calling a corresponding conversion function module according to a searched conversion index value, thereby allowing the corresponding conversion function module to operate to complete signal color gamut conversion, and to output the color gamut conversion to a display for display. According to the format, resolution ratio and color gamut space of an inputted signal, the YUV and RGB color gamut conversion method automatically starts a color gamut conversion function so as to rapidly recognize and convert a signal color gamut.

The invention provides a closed-loop transcranial brain stimulation system and method. The system comprises a transcranial ultrasonic signal generation module, a transcranial ultrasonic stimulation module, an electroencephalogram and electromyogram signal acquisition and processing module and an electrode module; the electrode module is used for collecting brain muscle signals of an experimental subject; the electroencephalogram and electromyographic signal collecting and processing module is configured to be used for collecting signals of the electrode module, processing the signals and then sending detection signals to the transcranial ultrasonic signal generating module; the transcranial ultrasonic signal generation module is configured to receive the detection signal, generate a stimulation signal according to the detection signal and an adjustment strategy, and send the stimulation signal to the transcranial ultrasonic stimulation module; the transcranial ultrasonic stimulation module is configured to emit ultrasonic stimulation to the experimental subject according to the stimulation signal. The beneficial effects of the invention are that the transcranial ultrasonic signal generation module adjusts the signal parameters of the transcranial ultrasonic stimulation module to the experimental subject next time according to the brain and muscle signals collected by the electrode module and a system expected value through a configuration strategy, thereby achieving the closed-loop control of the transcranial brain stimulation.

The invention discloses a wireless digital monitoring sensor for electrical equipment, which consists of a shell, a singlechip circuit, a power supply, a control circuit, a wireless communication circuit, a voltage detection circuit, a current detection circuit, a temperature detection circuit, a clock circuit, a line status detection circuit and an antenna, wherein the singlechip circuit, the power supply and the control circuit are arranged in the shell, and the antenna is arranged outside the shell. According to the device which is a wireless digital monitoring sensor, an electromagnetic field and a sensing component in the same space are utilized, so that the times and detailed time of common power failure and power transmission, the current value, the voltage value and relevant electric parameters with a fuzzy control method, and the common faults, such as large current overrun, interphase short circuit, local temperature rise overrun, strong power intrusion, surge, thunderbolt and the like of a power supply line and power equipment can be simultaneously detected.