24results about How to "Large dynamic range" patented technology

The invention discloses a biased binocular visual odometer method and device based on strawberry cuttlefish bionics. The biased binocular visual odometer method comprises the following steps: synchronously acquiring a bright field image and a dark field image collected by a biased binocular camera and inertial data of an inertial measurement unit; constructing a perceptual attention weight grid according to the bright field image and the dark field image, and performing brightness normalization processing on the bright field image and the dark field image; extracting lateral visual features based on the normalized image and the perceptual attention weight grid; and fusing the biased visual features with the inertial data, and solving through nonlinear optimization to obtain a carrier pose estimation result. According to the invention, the dynamic range of the binocular vision system is expanded, and the imaging and sensing capabilities of the system in an HDR scene are improved. And meanwhile, the positioning precision and robustness of the binocular visual odometer in an HDR scene are improved.

The invention discloses an online absorbance detection system with a high dynamic range. The online absorbance detection system comprises a flow cell, a multi-light source assembly, a detection assembly and an electronic control unit, the multi-light-source assembly comprises at least two light sources and at least two incident optical fibers, the front ends of the incident optical fibers are arranged in the flow cell at different insertion depths, and the incident optical fibers and the emergent optical fibers form different optical path lengths; the electronic control unit is lightened by driving the light source in a time-sharing manner, and optical signals under different optical paths are synchronously acquired by using the same detection assembly. Through the structural design without a mechanical moving part, a multi-optical-path detection system is constructed by utilizing the difference of the depth of the optical fiber inserted into the flow cell, and by combining a data processing algorithm in the electronic control unit, the optimal optical path is automatically selected according to the signal intensity to calculate the absorbance. The system has the advantages of wide dynamic range, simple structure, high response speed and the like, and effectively solves the problems of limited high and low concentration detection caused by a fixed optical path and abrasion and lag caused by mechanical switching of the optical path in the prior art.

The application discloses an optical power collection device and method, relates to the technical field of optical signal detection, and comprises the following: a photoelectric detector for converting an optical signal into a current signal; a transimpedance amplifier for converting the current signal into a pulse voltage signal; a peak detector for detecting the peak value of the pulse voltage signal; an RC filter network for filtering noise of the pulse voltage signal; a low-frequency amplifier for amplifying the low-frequency pulse voltage signal; an ADC collection module for converting the amplified pulse voltage signal into a digital signal; a first feedback network for adjusting the gain of the transimpedance amplifier; a second feedback network for adjusting the gain of the low-frequency amplifier; and a microcontroller for controlling the first feedback network to adjust the gain of the transimpedance amplifier according to the peak value of the pulse voltage signal and for controlling the second feedback network to adjust the gain of the low-frequency amplifier according to the digital signal.

The utility model relates to the technical field of headlight detection, in particular to a headlight detection system, which comprises a power supply module, a shunt resistor, an INA237 chip, a microcontroller, an alarm module and a communication module, the power supply module is used for being connected with an automobile power supply and supplying power to a circuit, the shunt resistor is connected in series in an automobile headlight power supply loop and used for current sampling, and the INA237 chip is connected with the microcontroller. The microcontroller is in communication connection with the INA237 chip and used for receiving and processing current, voltage and temperature data, the alarm module is connected with the microcontroller and used for receiving abnormal signals output by the microcontroller and giving an alarm, and the communication module is connected with the microcontroller and used for transmitting detection data to external equipment. The utility model provides a high-integration and high-precision detection circuit based on an INA237 chip, which realizes real-time monitoring and abnormal alarm of current, voltage and temperature of an automobile headlamp.

This invention discloses a wide dynamic range substrate reagent, belonging to the field of biological detection reagent technology. The reagent consists of the following components: citric acid, 9.6 g / L; 3,3',5,5'-tetramethylbenzidine, 0.29 g / L; 3% hydrogen peroxide solution, 3 mL / L; 1 g / L polyvinyl alcohol; 0.5 g / L copovidone W-735; 0.5 g / L dimethyldiallylammonium chloride-acrylamide copolymer; 1 g / L PVP K30; and Tween 20, 0.005 g / L. mL / L; polyethylene glycol 10g-50g / L; pure water, balance. This invention, by adding specific polyethylene glycol and synergistically combining with other components, significantly reduces the reagent background signal and improves detection sensitivity; effectively broadens the detection dynamic range and increases the detection upper limit of high-concentration analytes; improves the linear correlation between signal and concentration; and enhances the thermally accelerated stability of the reagent. This reagent has comprehensive performance and is especially suitable for ELISA detection systems with high sensitivity and wide detection range.

This application relates to the field of infrared remote sensing instrument calibration technology, and provides a high-dynamic-range, large-aperture, high-precision on-board blackbody radiation source and its temperature control method. The main body of this on-board blackbody radiation source is temperature-controlled by a refrigerator, exhibiting a large dynamic range, capable of temperature control from 200K to 310K. Through a three-layer structure consisting of the radiation source cavity, a cooling inner shell, and an outer shell, zoned temperature control via a heat transfer bracket, and a three-layer thermal insulation installation design, the temperature uniformity and stability of the blackbody radiation source are significantly improved, with temperature uniformity exceeding 30mK. Simultaneously, it possesses high emissivity (spectral emissivity reaching 0.998) and an aperture as large as 310mm, meeting the requirements for large field-of-view, long-distance use.

The invention provides a gas-sensitive optical fiber leakage monitoring and accurate positioning system, which belongs to the field of gas monitoring, and is characterized in that a light source module generates first wavelength laser and second wavelength laser, the first wavelength laser and the second wavelength laser are combined by a wavelength division multiplexer to obtain dual-wavelength composite laser, and the dual-wavelength composite laser is transmitted to each sensing node module through an optical fiber transmission channel; the sensing node module divides the dual-wavelength composite laser into power supply light and signal light, the power supply light is converted into electric energy through photoelectric conversion, a layered heterogeneous gas-sensitive material structure is adopted to detect the environmental gas concentration and output a voltage signal, and phase modulation is performed through a ferroelectric liquid crystal element; the signal processing module calculates according to the modulated signal light to obtain a gas concentration value at each sensing node module and a spatial position of a leakage source; and the control processing module receives and processes the spatial position of the leakage source and the gas concentration value and gives an alarm. According to the invention, simultaneous monitoring and identification of multi-component gas are realized, and high-precision monitoring and accurate positioning of leakage of various gases are realized.

The application discloses a kind of wide dynamic range diamond NV color center magnetic sensing method and system, wherein, method includes: (1) in initial magnetic field environment, the initial resonance frequency and magnetic sensing coefficient of diamond NV color center are calibrated;(2) in the magnetic field environment to be measured, microwave generator is with current resonance frequency as center frequency to diamond NV color center and is applied frequency-modulated microwave;Real-time demodulation is carried out to fluorescence signal using phase-locked detection technology, and an error signal is obtained;According to error signal and magnetic sensing coefficient, the detuning of center frequency is calculated in real time, and the change amount of magnetic field intensity is further calculated;While, detuning is fed back to microwave generator to track the resonance frequency of diamond NV color center;(3) by continuously repeating step (2), the magnetic field measurement of wide dynamic range is realized.The application has the advantages of wide dynamic range, strong and weak field mixed signal detection ability in complex application scene while considering magnetic sensing sensitivity.

The application relates to a linear sweep frequency laser generating device, which comprises a semiconductor laser, a driving circuit, a laser beam splitter, a laser frequency discriminator unit, a radio frequency signal generating unit and a laser frequency shift unit; the semiconductor laser is controlled by the driving circuit to generate sweep frequency laser, and is divided into two beams by the laser beam splitter and enters the laser frequency discriminator unit and the laser frequency shift unit respectively; the laser frequency discriminator unit extracts a nonlinear sweep frequency component of the sweep frequency laser and generates a control signal to control the radio frequency signal generating unit; the radio frequency signal generating unit generates a radio frequency signal with a frequency opposite to that of the nonlinear sweep frequency component according to the control signal to drive the laser frequency shift unit; the laser frequency shift unit modulates the frequency of the radio frequency signal on the input light frequency to offset the nonlinear sweep frequency component of the sweep frequency laser and output linear sweep frequency laser. Compared with the prior art, the application has the advantages of high sweep frequency rate, large sweep frequency range and linear sweep frequency laser.

The present application relates to a kind of high dynamic range image fusion method and device of ToF system.The present application judges whether the four phase data of high gain / long exposure time image are all luminance non-saturation first, if all are luminance non-saturation, then high gain / long exposure time image is used to carry out luminance calculation, otherwise low gain / short exposure time image is used to carry out luminance calculation, can only need to calculate the image of ToF system infrared thermal imager, need not simultaneously calculate two images, save the ToF system MCU operation time, can quickly carry out high dynamic range image fusion, can increase the dynamic range of ToF system infrared thermal imager image, avoid the phenomenon that only use low gain / short exposure time image causes the noise of image to be large, improve the image quality of ToF system infrared thermal imager.

The application discloses a kind of based on light field diffraction iteration's spherical element surface shape reconstruction system and method, it is related to the detection of spherical element surface shape in optical detection technical field, its purpose is to solve the technical problem of high measurement cost, low measurement efficiency caused by the surface shape measurement method needing reference plane in prior art when spherical element surface shape reconstruction.Light is divided into two ways after spectroscope, one way of transmission light is absorbed by light trap to avoid forming stray light, another way of reflection light is finally recorded diffraction spot map by CCD camera after the spherical mirror to be measured, phase reconstruction algorithm based on light field diffraction iteration is used to realize spherical element surface shape reconstruction, obtain the surface shape distortion containing the error of spherical mirror to be measured, the surface shape distortion not containing the error of spherical mirror to be measured, finally obtain the surface shape error of spherical mirror to be measured, the whole process does not need the surface shape measurement method of reference plane, measurement cost is lower, measurement efficiency is higher, has great application prospect.

The application relates to a carry chain delay tuning method and device of a field programmable logic gate array, and belongs to the technical field of time-to-digital conversion. In view of the problem that the large time interval difference of each tap of the carry chain leads to poor linearity of measurement, a delay chain is constructed by cascading multiple-stage carry chain unit stages, the output of the previous stage is simultaneously guided to the first input end with a small delay and the second input end with a large delay of the next stage; calibration measurement is carried out by taking the full second delay path as an initial structure; according to the delay parameter, the input path of the time interval deviation over-limit tap is switched to the first delay path to form a mixed delay chain. The application improves the tap distribution uniformity by dynamically adjusting the path selection parameter and the multi-stage register output selection adjustment, and is mainly applied to a high-precision time-to-digital converter and a measurement test system.

This invention discloses a method for enhancing low-quality images. The method involves normalizing the original low-quality RGB image, converting the normalized image from RGB to HSV format to obtain a first intermediate image, and obtaining the luminance component V1 of the first intermediate image. The normalized image is then inverted, and converted from RGB to HSV format to obtain a second intermediate image, and the luminance component V2 of the second intermediate image is obtained. Luminance components V1 and V2 are enhanced separately, and the two enhanced luminance components are weighted and fused to obtain a luminance component V3. Luminance component V3 is then inversely normalized, and the inversely normalized image is converted from HSV to RGB format to obtain the target image. This invention effectively expands the dynamic range in both low and high illumination, improving underexposed pixels while suppressing overexposed pixels. The image processed using this invention has a balanced visual effect and can effectively improve the contrast of low-quality images.

The invention relates to the technical field of gas detectors, in particular to a microneedle array type gas detector. The microneedle array type gas detector comprises: a cathode plate, one side of which is provided with a boss in the central area and is used as a cathode; the anode plate and the cathode plate are arranged at an interval, and a plurality of microneedles are inserted into one side, facing the cathode plate, of the anode plate and are used as positive electrodes; the boss is loaded with a first negative bias voltage, and the micro-needle is kept at a zero potential, so that a drift electric field is formed between the boss and the micro-needle. According to the gas detector, the microneedle with the large curvature radius is adopted as the positive electrode, so that the intensity of an electric field near the needle tip is rapidly weakened along with the increase of the distance, the gas detector can stably operate under high gain, the counting rate performance of the gas detector can be improved, and the gas detector can be flexibly matched with electronics to expand the dynamic range of the gas detector.

The present application provides a kind of ghost imaging monitoring method and system based on environmental coupling simulation and image enhancement, the method comprises: setting initial light source, the initial light source is handled with splitter matrix model to obtain probe light path light source and reference light path light source, based on the probe light path light source and reference light path light source, respectively construct probe light path and reference light path;In probe light path, lens, object to be measured and bucket detector are set in sequence, and surface detector is set in reference light path, high gauss blur is introduced in probe light path to simulate heavy fog environment, and random phase screen based on Perlin noise is introduced to simulate turbulent environment.The present application builds ghost imaging system through Python, uses Gaussian simulation to simulate heavy fog environment and turbulent environment, and combines the concept of histogram equalization in digital image processing, the imaging quality of ghost imaging is optimized by non-linear mapping gray scale chart, and the imaging quality of ghost imaging system under long-distance condition can be improved.

The application provides a CMOS image sensor, a CMOS camera and a high dynamic range CMOS camera imaging method, and aims to solve the technical problems of low noise process and pixel size optimization of the CMOS image sensor, long process, complex process and large cost investment. The CMOS image sensor comprises a coated window and an uncoated window; the coated window is coated with a layer of fluorescent material, the coated window is used for receiving light emitted by the fluorescent material, and the uncoated window is used for receiving light of a photographed object. The CMOS camera comprises the CMOS image sensor, the area proportion of the fluorescent material coated by the CMOS image sensor and the attenuation coefficients of different fluorescent materials, and the dynamic range is flexibly adjusted by cooperating with corresponding secondary exposure and data reading mode.

The application provides a mass spectrum imaging method for analyzing chemical components and spatial distribution of dried traditional Chinese medicine decoction pieces by using imprinting method, comprising: applying pressure to the traditional Chinese medicine decoction pieces to be tested to obtain a relatively flat cross section; establishing a "sandwich" structure, and transferring the components of the cross section of the traditional Chinese medicine decoction pieces to a transfer film by using imprinting method; performing ionization scanning on the transfer film in a mass spectrometer by using mass spectrum imaging detection method to obtain mass spectrum imaging data of the chemical components in the transfer film of the traditional Chinese medicine decoction pieces to be tested; performing data processing on the mass spectrum imaging data to identify the chemical components in the sample to be tested; and analyzing the spatial distribution rule of metabolites in the traditional Chinese medicine decoction pieces to be tested. The application can overcome the difficulty that the dried traditional Chinese medicine decoction pieces are hard and have uneven surfaces, and are difficult to be prepared into imaging samples, fill the gap of the mass spectrum imaging method for dried traditional Chinese medicine decoction pieces, and has the advantages of simple operation, high sensitivity, wide dynamic range, and multiple types of component coverage.

The application provides a method for identifying fireworks, comprising: obtaining a first confidence corresponding to a target object to be identified in a first image; determining a target region in the first image when the first confidence is greater than a first preset value; taking an enlarged shot of the target region to obtain K second images; identifying the second images according to at least two image recognition algorithms to obtain a second confidence corresponding to each image recognition algorithm of the target object; and determining a third confidence according to the first confidence and the second confidence, wherein the third confidence is used to represent the probability that the target object is fireworks. In this way, the first image is preliminarily screened to obtain the first confidence, then an enlarged shot is taken, and then the second confidence is obtained through two image recognition algorithms. The third confidence is obtained by comprehensively obtaining the confidence through multiple ways, thereby improving the accuracy of the third confidence and the precision of the identification of fireworks.

The application provides a high-temperature detection method and system based on near-infrared full-spectrum analysis, relates to the field of high-temperature detection, and solves the technical problems of low high-temperature measurement precision, weak anti-interference ability and poor universality caused by the use of discrete wavelength point information in the prior art. The method comprises the following steps: collecting full-spectrum radiation signals of a high-temperature target to be measured in a near-infrared band to obtain a spectral curve of the high-temperature target to be measured; performing baseline correction and normalization pretreatment on the spectral curve; fitting the pretreated spectral curve with standard spectral curves in a blackbody standard curve library established in advance to obtain a fitting goodness parameter; and analyzing the temperature value of the high-temperature target to be measured according to the fitting goodness parameter. The application is used in the high-temperature detection process.

The invention discloses a video recording method and device and electronic equipment, and belongs to the technical field of mobile photography, and the method comprises the steps: generating an exposure strategy of a kth frame period based on scene illumination information obtained in a (k-1) th frame period; wherein the exposure strategy comprises at least two different exposure times, the sum of all the exposure times in the exposure strategy does not exceed a frame period corresponding to a video recording frame rate, and k is an integer greater than 1; controlling an image sensor to respectively carry out image acquisition according to each exposure time in the exposure strategy of the kth frame period in the kth frame period to obtain at least two different exposure images corresponding to the kth frame period; and generating a video file based on the exposure images obtained in all the frame periods.

This invention relates to the field of sensor technology, and discloses a capacitive touch detection circuit and method. The capacitive touch detection circuit includes a charge compensation module, a voltage-to-current conversion module, an integrating capacitor, a quantization circuit module, and a counter. The charge compensation module is used to compensate for the charging and discharging of an external touch capacitor, adjusting the charge on the touch capacitor to a predetermined charge range corresponding to a reference voltage. The voltage-to-current conversion module is used to convert the remaining charge on the touch capacitor after compensation by the charge compensation module into current and output it. The integrating capacitor is used to integrate the current to obtain an integrated voltage. The quantization circuit module is used to quantize the integrated voltage and control the integrated voltage to be stable within a preset voltage range of the reference voltage. The counter is used to count the output of the quantization circuit module to obtain a digital code representing the touch capacitance value. This invention can achieve touch detection performance with high linearity, low power consumption, small area, and high noise immunity.

The invention relates to a control method of shooting equipment and handheld shooting equipment. The method comprises the following steps: acquiring a shooting starting instruction; based on the instruction of starting shooting, identifying shooting parameters when the shooting device captures an image; and determining the target light transmittance of the light reducing mirror based on the shooting parameters, and automatically adjusting the light reducing mirror to the target light transmittance. Firstly, the operation requirement of manually adjusting the light reducing mirror is simplified, so that the shooting equipment can still quickly adapt to the light reducing mirror in a complicated or quickly changing shooting environment, and the optimal shooting effect is kept. And secondly, the dimmer can automatically adjust the light transmittance by setting different shooting parameters, so that expected effects such as creation of different field depth effects, motion blur and the like can be realized more flexibly in the shooting process. Meanwhile, in a high-contrast scene, the light transmittance of the light reducing mirror is dynamically adjusted, so that shooting equipment can be helped to better capture highlight and dark details, and the dynamic range of an image is expanded.

The application relates to a programmable gain amplifier circuit for extending the dynamic range of an image sensor, comprising a switched capacitor circuit and a negative feedback DC offset cancellation circuit; the switched capacitor circuit is used for twice correlated double sampling and amplification processing of the output signal of the image sensor pixel column, eliminating the fixed pattern noise and reset thermal noise, and outputting high-sensitivity and low-sensitivity analog voltages; the negative feedback DC offset cancellation circuit is used for reducing the influence of the offset voltage of the main operational amplifier on the output voltage by adopting an operational amplifier offset voltage storage mode. In the application, the image column fixed pattern noise caused by the offset voltage of the main operational amplifier can be greatly reduced through the operational amplifier offset storage technology, and the high-sensitivity and low-sensitivity analog signal inputs can be provided for the post-processing circuit in time through the twice correlated double sampling processing technology, so that the dynamic range of the image sensor is extended, and the image imaging quality is improved.

The present application relates to the technical field of marker detection, in particular to a DCP homogeneous photochemical chemiluminescence detection kit and a detection method thereof.The detection kit of the present application comprises a photosensitive microsphere reagent and a luminescent microsphere reagent; the photosensitive microsphere reagent comprises a photosensitive microsphere-anti-one complex; and the luminescent microsphere reagent comprises a luminescent microsphere-anti-two complex.The present application ingeniously combines photosensitive microspheres with luminescent microspheres, and constructs a homogeneous photochemical chemiluminescence detection system based on singlet oxygen energy transfer mechanism.This system not only simplifies the experimental process, but also enhances the stability and specificity of signal conduction, ensuring the reliability and consistency of the detection results.Through systematic condition screening and optimization, a new type of DCP photochemical chemiluminescence immunoassay kit is successfully developed, with a detection range of 0.1 ng / mL to 100 ng / mL.