41results about How to "Guaranteed dynamic range" patented technology

Provided is a blood coagulation analyzer whereby both of an adequate dynamic range and a high sensitivity can be achieved in analyzing blood coagulation, without using any complicated device, by selecting an appropriate detection angle depending on the scattering light intensity of each specimen. The blood coagulation analyzer comprises: a reactor (101) in which a sample and a reagent are mixed together and reacted; a light source (102) for irradiating the reactor (101) with light; multiple detectors (103a, 103b), which are positioned around the reactor (101) at different angles to the light axis of the light from the light source (102), for detecting scattering light generated from the liquid mixture of the sample and the reagent; a memory unit (107) for inputting and memorizing multiple light intensity change data over time obtained from the detectors (103a, 103b); a determination unit (106) for selecting, depending on the amount of light intensity change, light intensity change data to be used in calculating blood coagulation time from among various light intensity change data stored in the memory unit (107); and a calculation unit (108) for calculating the blood coagulation time based on the light intensity change data selected by the determination unit (106).

The invention relates to a digital predistortion device with a drain modulation function, which is connected with a power amplifier and comprises a digital baseband signal processor, a signal transformation module and a radio frequency and frequency conversion module which are sequentially connected by a circuit, wherein the digital baseband signal processor contains a digital clipping module as well as a predistortion processing module and a drain modulation module which are respectively connected with the output end of the digital clipping module by the circuit. When carrying out digital clipping and predistortion process, the device also can carry out drain modulation on the power amplifier, and can simultaneously achieve the benefits of improving power amplifier linearity and power amplifier dynamic effect as well as reducing peak-to-average power ratio (PAPR) and signal distortion.

The invention discloses a time-sharing power supply and data acquisition system used for a photoconductive type infrared detector array. The time-sharing power supply and data acquisition system comprises a constant-current source, an input multi-channel analog switch, an output multi-channel analog switch, a data acquisition and processing unit and n bridge type amplification drive units corresponding to photoconductive type infrared detectors one to one, wherein the gating end of the input multi-channel analog switch and the gating end of the output multi-channel analog switch can conduct synchronous gating on the same bridge type amplification drive unit under the action of a drive level so that synchronous power supply and data acquisition can be conducted on measuring units. The time-sharing power supply and data acquisition system effectively solves the problem that the photoconductive type infrared detectors and drive circuits give out heat in the continuous working process, the baseline drift caused by temperature rising of the detectors is avoided, the dynamic range is ensured, and the requirement of a measuring system for long-time working is met.

The invention discloses a digital multi-beam correction and synthesis method, and aims to provide a multi-beam signal with wide frequency band coverage for an electronic reconnaissance system. According to the technical scheme, the method is implemented by the steps: enabling a received signal to be subjected to AD sampling through a channel module, completing AD analog-to-digital conversion of a receiving channel, and obtaining a baseband IQ data signal through an FPGA; carrying out the processing in two steps: 1, converting a waveform of a time domain to a frequency domain after FFT calculation and windowing of a preprocessing module, transmitting the waveform to a general processor, selecting a reference channel by the general processor, calculating the amplitude and phase difference between each channel and the reference channel, calculating a correction coefficient, issuing the correction coefficient to an FPGA, and enabling the FPGA correction filter bank to load a correction coefficient of a corresponding frequency band; 2, performing digital multi-beam synthesis on the broadband signal, and forming a beam signal of a multi-beam baseband signal pointing to different airspaces in a plurality of directions in a digital beam synthesis module for a rear-end signal detection and reception device to use or perform multi-beam direction finding processing.

The invention relates to a screen refreshing positioning method and device, display equipment and a storage medium. The screen refreshing positioning method comprises the following steps: acquiring touch position information; wherein the touch position information is acquired by a touch pen through lamp bead data displayed by the touch object based on a refreshing strategy; wherein the refreshing strategy comprises a control instruction used for indicating that the current refreshing content of the touch object is the position of the lamp bead; wherein the lamp bead data comprises a lamp bead actual gray scale used for expressing the position of the lamp bead; analyzing the touch position information to obtain the actual gray scale of the lamp bead, and determining the current touch point position of the touch pen based on the deviation between the actual gray scale of the lamp bead and the corresponding calibration calling gray scale. Accurate coordinate positioning can be realized with relatively low time delay, meanwhile, when the coordinate content is refreshed, the display effect of the coordinate content is not influenced, and the dynamic range of the touch object in the corresponding time slice is ensured.

The invention relates to the field of laser detectors and discloses a near-infrared laser proximity detector and a detection method thereof. The near-infrared laser proximity detector in the invention includes a casing, laser transmitting modules, laser receiving modules, a signal processing module, a power module and an insert connection component. The power module is electrically connected with the transmitting modules, the laser receiving modules and the signal processing module respectively; the signal processing module and the power module are all arranged in the casing; near-infrared pulse semiconductor laser transmitters and the laser receiving modules are distributed uniformly at side faces of the casing; and the insert connection component is arranged at a top part of the casing. The near-infrared laser proximity detector of the invention is capable of reducing interferences from cloud and mist or smoke under an aerosol environment and the detection method of the near-infrared laser proximity detector of the invention has the characteristics of being simple and convenient to realize, high in detection efficiency and precise.

The invention relates to a radar antenna received signal preprocessing device and preprocessing method. The device is additionally provided with a directional coupler, a detector, a microwave switch,an optical switch and a control unit, and is provided with n light emitting modules, amplifiers of the light emitting modules have different magnification times, which correspond to different power intervals of microwave signals. According to the processing method, microwave signals received by an antenna are divided into two paths by the directional coupler, the majority of the microwave signalsenters the microwave switch, and a small part of the microwave signals enters the detector to detect a power value. The control unit selects the light emitting module corresponding to the magnification times of the corresponding power interval according to the current signal power value depending on the detection result, controls the microwave switch to access the current microwave signal, and controls the optical switch to connect an output end of the selected light emitting module to a transmission optical fiber; the microwave signals are amplified and converted into optical signals; and theoptical signals are sent to a light receiving module by the transmission optical fiber. The magnification times are selected according to the signal power, the large signal does not need to be attenuated, and the small signal has a large amplification rate, thereby ensuring the dynamic range of the entire radar system.

The invention discloses a circuit and method for shortening pixel output stabilization time, and belongs to the technical field of image sensing, load units provide tail current signals for pixel units, each pixel unit is composed of a pixel matrix with M rows and N columns, each column of pixels is correspondingly provided with one load unit, and a first MOS tube is used for electrically reading a third MOS tube within the time period of electronically reading the third MOS tube. Cutting off a tail current signal provided for the pixel unit; the second MOS tube is used for controlling the load MOS tube to work normally in the time period of electronically reading the third MOS tube; the pixel driving circuit has the beneficial effects that under the condition that pixel supply current is not increased, the capacitive coupling influence quantity on the grid voltage of the eighth MOS tube is reduced to the minimum, the dynamic range of pixel output can be ensured, and the quality of an output image is ensured; and moreover, the time required for stable pixel output is greatly shortened, the time of one reading period is shortened, the output frame rate of the sensor is increased, and the definition of image quality is improved.

The invention provides an anti-shock saturation vibration signal conditioning circuit, which is used for being connected with a PE vibration sensor and comprises a differential input charge-to-voltage circuit, a band-pass filter circuit, an integrating circuit, an effective value conversion circuit, a power supply and a 4-20mA conversion circuit, the differential input charge-to-voltage circuit, the band-pass filter circuit, the integrating circuit, the effective value conversion circuit and the 4-20mA conversion circuit are connected in sequence; the power supply is respectively connected with the differential input charge-to-voltage circuit, the band-pass filter circuit, the integrating circuit, the effective value conversion circuit and the 4-20mA conversion circuit; the differential input charge-to-voltage circuit is connected to the PE vibration sensor, the 4-20mA conversion circuit is used for outputting a 4-20mA vibration speed current signal, and when a larger impact signal component is input by the sensor, the output signal is unsaturated, so that the detection of the vibration signal component is met.

The invention provides an audio signal processing method and device and a storage medium. The audio signal processing method comprises the following steps: acquiring a current frame audio signal as a first audio signal; performing first automatic gain processing on the first audio signal to obtain a second audio signal, wherein the first automatic gain processing specifically comprises: segmenting the first audio signal into audio signals of a plurality of first subframes, calculating a first parameter value according to the audio parameter of each first subframe, comparing the first parameter value with a first threshold interval, obtaining the number M of the subframes of which the first parameter value is not in the first threshold interval, and when M is greater than the first statistical number of times, performing signal gain on the sample points of the first audio signal at the same time. According to the invention, the sample points of the first audio signal are gained at the same time, so that the dynamic range of the audio is kept, the sense of fluctuation of the audio volume is kept, and the voice quality can be improved.