342results about "Photometry using reference value" patented technology

The invention discloses a light source detection method, a light source detection device and a storage medium, and relates to the technical field of electrical appliances, the light source detection device comprises an optical fiber, a light sensor and a collecting lens, the collecting lens is used for converging light of a light source to be detected and emitting the light to the optical fiber, the optical fiber is used for conducting incident light to the optical sensor. The method comprises the following steps: acquiring actual brightness detected by the optical sensor; and determining whether the light source to be detected is qualified or not according to the relationship between the actual brightness and the standard brightness. The invention aims to improve the accuracy of light source detection.

A method for determining natural illumination duration and an electronic device are provided, to more accurately determine a scenario in which a user is located and effectively determine natural illumination duration, to help the user improve vision. The method is applied to an electronic device having a display screen and includes: determining a current scenario based on a preset reference factor (S901), where the preset reference factor includes any one or more of ultraviolet intensity, illumination intensity, and locating signal strength; and counting current natural illumination duration towards cumulative natural illumination duration if the current scenario is a preset scenario (S902), where the preset scenario includes any one or more of an outdoor scenario, an indoor near-window scenario, and an outdoor blocked scenario.

The invention relates to the technical field of LED display testing, in particular to an LED screen backlight module performance testing system which comprises the steps that a model identification code of a module to be tested is received, a corresponding standard optical parameter set is called, and initial driving current is applied. Actual optical signals driven by different currents are collected through a light sensing probe array and converted into a digital optical measurement value set containing brightness and color coordinate values of multiple sampling points. Comparing the brightness measurement value with a target brightness value point by point to generate a brightness consistency deviation matrix; and judging the color coordinate measurement value and the target range, and generating a color coordinate qualified identifier list. And calculating an actual brightness uniformity value according to the deviation matrix, and comparing the actual brightness uniformity value with a standard threshold value. And if the actual brightness uniformity value reaches the standard and the color coordinates of all the sampling points are qualified, generating a module qualification judgment instruction. According to the system, automatic and high-precision comprehensive evaluation of brightness space uniformity and chromaticity consistency of the backlight module is realized.

A gauge that is configured to detect a time at which radiation enters the gauge. The gauge may include a member that is configured to transition from a first state to a second state upon receipt of the incoming radiation, and may include a light probe that is configured to detect when the member transitions to the second state. The gauge may provide for determining a time of arrival of the radiation at another gauge. For example, the gauge may correlate the time of arrival at the gauge with the another gauge, thereby providing for correlating a response time of a test specimen with actual exposure time of the test specimen to radiation (e.g., an ion beam).

The invention relates to the technical field of induction lamps, and discloses an ambient light detector and an induction lighting device with the same. The ambient light detector comprises a light condensation piece which is a reflection cup, the concave face of the reflection cup is a reflection face, and the edge of the large opening end of the reflection cup is parallel to the main shaft of the reflection cup; and the light sensation receiving piece is installed at the small end of the reflection cup, and the light receiving face of the light sensation receiving piece faces the reflection cup. Through the cooperation of the light condensing part and the light sensation receiving part, light in a detection angle can be converged and enhanced, light outside a detection range can be automatically shielded and is not received, and a clear detection boundary can be realized. The light sensation receiving part receives the light signals which are converged and enhanced and have clear boundaries in a large-angle range, so that the light change of the external environment can be accurately detected, and the environment error when the light intensity of the lamp is adjusted according to the light signals received by the light sensation receiving part is greatly reduced.

The invention discloses a carbon brush ignition monitoring method, device and system and a storage medium. According to the invention, the basic light intensity of the background light in the carbon brush ignition monitoring system is introduced, and the ambient light is considered into the carbon brush ignition monitoring method. Firstly, the basic light intensity is compared with a set intensity value, and then the ignition state of the carbon brush at the current moment is determined based on a comparison result of a pulse parameter value and a set parameter value. In this way, the illumination intensity is used as one of the parameters for carbon brush ignition monitoring, and the accuracy of carbon brush ignition monitoring is improved.

A wireless battery-powered daylight sensor for measuring a total light intensity in a space is operable to transmit wireless signals using a variable transmission rate that is dependent upon the total light intensity in the space. The sensor comprises a photosensitive circuit, a wireless transmitter for transmitting the wireless signals, a controller coupled to the photosensitive circuit and the wireless transmitter, and a battery for powering the photosensitive circuit, the wireless transmitter, and the controller. The photosensitive circuit is operable to generate a light intensity control signal in response to the total light intensity in the space. The controller transmits the wireless signals in response to the light intensity control signal using the variable transmission rate that is dependent upon the total light intensity in the space. The variable transmission rate may be dependent upon an amount of change of the total light intensity in the space. In addition, the variable transmission rate may be further dependent upon a rate of change of the total light intensity in the space.

An optical system for a dry biochemical analyzer. The system consists of a light-source feedback unit, a light-homogenizing illumination light path and a collection light path. The electric current of a light source can be adjusted by means of the light-source feedback unit, such that the intensity of light output by the light source is stable. The system has a simple structure, high adjustment precision and high stability. By means of a multi-channel light-source current driver provided in the light-source feedback unit, rapid switching control over monochromatic light sources with different wavelengths can be realized. By means of the light-homogenizing illumination light path, light-homogenizing processing is performed on incident light beams, such that uniform illumination can be obtained on a dry reagent strip under test, the light path is concise, and a plurality of monochromatic light sources with different wavelengths that are provided off-axis can be overlapped and focused at the same position. The collection light path is configured as a telecentric light path, and a field diaphragm is provided, such that light beams on an entire illuminated surface can be uniformly collected. By using the system, the accuracy of collected reaction light beams corresponding to an object to be tested can be improved, thereby improving the accuracy of a subsequent analysis result of said object.

The invention provides an automobile atmosphere lamp illumination uniformity detection method and system, detection points of a simulated automobile cabin are determined, detection parameters of the detection points are set, and simulated human eye light sensation visual detection in the automobile cabin is realized by setting the detection points; by means of illumination detection data of all detection points on atmosphere light, global illumination distribution of a vehicle cabin is constructed, a non-uniform illumination area in the global illumination distribution is determined, and non-uniform illumination space distribution formed under the current atmosphere light illumination condition is accurately positioned; a target atmosphere lamp suitable for eliminating the non-uniform illumination area is determined in combination with the spatial relationship between the non-uniform illumination area and the atmosphere lamp layout, illumination change information of the target atmosphere lamp is determined, it is ensured that global atmosphere lamp uniformity illumination detection is implemented for the specific cabin environment in the design stage, and by changing the light emitting illumination state of the atmosphere lamp, the uniformity of the atmosphere lamp is improved. The overall lighting quality of the cabin is improved.

The invention refers to a photometric process measurement arrangement (10) with a photometric immersion probe (20). The photometric immersion probe (20) comprises a photometer flashlight source (61) for providing photometric light impulses, a photometric detector arrangement (70) comprising at least two separate wavelength-selective detection elements (71, 72, 73), and a photometer control (80) controlling the photometer flashlight source (61) and the detector arrangement (70). The photometer control (80) comprises several impulse signal integrators (819, 829, 839) for integrating the electric impulses generated by the detection elements (71, 72, 73), several A / D-converters (81, 82, 83) for converting the voltages of the impulse signal integrators (819, 829, 839) when high-precision-converting trigger ports (H) of the A / D-converters (81, 82, 83) are triggered, and a measuring cycle control (90) with an integration target memory (94) memorizing an integration target voltage value (Ut). The photometer control (80) is provided with a high-precision-request port (93) for synchronously triggering the high-precision-converting trigger ports (H) of all A / D-converters (81, 82, 83) after the voltage of the first of all impulse signal integrators (819, 829, 839) has exceeded the memorized integration target voltage value (Ut).

The embodiment of the invention discloses a glare collaborative test method and device for a self-adaptive high beam and electronic equipment. The method comprises the steps of firstly obtaining test data of a target vehicle in a site test, performing a darkroom light test on the target vehicle based on bus data in the test data to obtain light shape data corresponding to each target moment, and then determining a target illumination range corresponding to each light shape data according to inertial navigation data in the test data, and finally, determining a glare test result of the self-adaptive high beam according to a comparison result of the target illumination range and the theoretical glare affected range which are paired in pairs. Test data obtained in a field test are recharged into a darkroom light test scene through data, and a glare collaborative test of the adaptive high beam is performed, so that a real road driving condition environment can be simulated, a target illumination range of each target moment can be accurately and efficiently determined in the darkroom test environment, and the test efficiency is improved. And the accuracy and the efficiency of the adaptive high beam glare test are improved.

The invention relates to a method and a device for determining an albedo of the ground and / or an irradiance of radiation reflected by the ground (14), in a solar installation (12), by means of at least one device (30, 31, 54) for capturing ground-based measurement data, comprising at least one camera (32) which captures an image or a plurality of images of the ground (14) and an evaluation unit (42) which evaluates the ground-based measurement data using satellite image data. The invention also relates to a computer program for determining an irradiance of radiation reflected by the ground, to a data processing device, and to trained machine-learning models for extracting features.

The invention relates to an LED lamp detection device and method, and belongs to the technical field of LED lamp detection. The light intensity of a to-be-detected LED traffic signal lamp is monitored through an arranged sensing assembly, and the environment light of the to-be-detected LED lamp is detected through an environment detection assembly; the control assembly cleans the light intensity data fed back by the induction assembly according to the environment light intensity data to generate actual light intensity data, and the control assembly judges whether the LED traffic light to be detected is attenuated or not according to comparison of the actual light intensity data and a light intensity threshold value, so that whether illumination of the LED traffic light to be detected is sufficient or not is achieved, and the detection accuracy is improved. Therefore, the illumination intensity of the traffic light can be monitored.

A method and system are provided for rapidly determining equi-depth histogram (ED histogram) boundaries for single photon arrival times without storing complete photon timestamp histories. A plurality of control values (CVs) is initialized for a plurality of binners that classify photon events as early or late relative to the respective CVs. Upon detecting photon arrivals, early and late arrival counts are used to update the CVs using an improved stepping strategy. The disclosed stepping strategy includes scaling a base step size, smoothing with exponential smoothing, temporally decaying the smoothed step size, and further smoothing to produce the step size for updating the CV. The disclosed stepping approach enables the CVs to rapidly converge to the desired quantile locations with low bias and variance compared to previous methods. The optimized stepping strategy is robust to noise and background light, providing accurate distance estimates while reducing bandwidth requirements.

There is provided an integrated device for wavelength dependent detection of light, comprising: a concentrating element comprising a collecting end and a transmitting end, and configured to collect light incident at the collecting end, and to concentrate the light at the transmitting end; a multimode waveguide forming an extension from a receiving end to a distributing end, and surrounded by a host medium along the extension, wherein the transmitting end is coupled to the receiving end, the waveguide being configured to receive the light from the concentrating element at the receiving end, wherein the waveguide and the host medium are configured to propagate light to form a light pattern at the distributing end, wherein a distribution of the light pattern across the distributing end is dependent on wavelength of the light; a plurality of light sensitive elements arranged such that different light sensitive elements receive different portions of the light pattern at the distributing end for wavelength dependent detection of light.

The invention discloses a resonance balance zero-beat photoelectric detector with a notch characteristic and a printing device and a testing device of the resonance balance zero-beat photoelectric detector, and belongs to the field of photoelectric detectors. The LC series resonance trap circuit is introduced into the resonance type balanced zero-beat detector, noise at the pulse light repetition frequency can be suppressed by adjusting a fine tuning capacitor in the LC series resonance trap circuit, the optimal trap effect is ensured, the saturation power and the signal-to-noise ratio of the photoelectric detector under the pulse light are improved, and the photoelectric detector can be applied to the field of photoelectric detection. The device can be applied to testing of pulse compression light.

Aspects of the present invention relate to methods and systems for measuring and managing the brightness of digital content in a field of view of a head-worn computer.

This invention relates to a method and a system for operating a light detection system configured to detect if a light event detected in a closed package having a lid and containing an asset is caused by opening the lid of the package or by ambient light entering the package when the package is closed. After closing the package incoming light intensity is detected and utilized to determine a first upper-threshold light intensity level and a first lower-threshold light intensity level, where the resulting light intensity window is utilized as a first reference light intensity window. If the light intensity is detected to be within the first light intensity window, the light detection system remains in the first low energy mode. If, at later time point, the detected light intensity is above the first upper-threshold light intensity level the light detection system is set to a higher energy mode when a subsequent detected light intensity is detected to be above the first upper-threshold light intensity level, the higher energy mode being an energy mode where a potential box opening event is triggered. At the higher energy mode it is determined if the lid has been opened or not. If not, the detected light intensity is utilized to dynamically updating the first reference light intensity window to a second reference light intensity window

Provided are a detection apparatus and a wearable device, which are capable of suppressing periodic body movement noise when acquiring biometric information. First frequency domain data for each pixel is generated on the basis of detection values for a plurality of pixels acquired in time series. The maximum intensity among the signal intensities corresponding to the respective frequencies of the first frequency domain data is defined as a first signal intensity for each pixel. A domain in which the first signal intensity is equal to or greater than a prescribed value within a sensor domain is defined as a first domain. On the basis of the first frequency domain data in the pixels in the outer peripheral portion of the first domain, second frequency domain data, in which a prescribed frequency range of the first frequency domain data in all the pixels in the first domain is masked, is generated. The maximum intensity among the signal intensities corresponding to the respective frequencies of the second frequency domain data is defined as a second signal intensity for each pixel. When the area of a second domain, in which the second signal intensity is equal to or greater than a prescribed value, is not less than a prescribed value, the biometric information is acquired on the basis of the second frequency domain data. When the area of the second domain is less than the prescribed value, the biometric information is acquired on the basis of the first frequency domain data.

The invention provides a light brightness detection method, electronic equipment, a processor and a computer program product. The method comprises the following steps: a first detection step: detecting an output electric signal of a first optical sensor within a first exposure duration; a second detection step of detecting an output electric signal of a second optical sensor within a second exposure duration; and a determination step: in all the detection steps, detection is stopped under the condition that the obtained output electric signal is in a preset electric signal range, and the method solves the problem of low detection precision of the ambient light sensor in the prior art.

To provide a display light measuring apparatus, a measuring method, and a program capable of suppressing errors caused by residual charges of an integration capacitor in an integration circuit.SOLUTION: A display light measuring apparatus includes: optical sensors 41 to 43; integration circuits 51 to 53 each having an integration capacitor, the integration circuits being configured to accumulate charges output from the optical sensors; light quantity limiting means 90 for limiting a quantity of incident light to the optical sensors; trigger detection means 93 for detecting a trigger signal serving as a trigger for operating the light quantity limiting means 90 to limit the light quantity; reception means 7 for receiving a command to perform a measurement operation; and control means 7 for operating the light quantity limiting means 90 to limit the light quantity on the basis of the detection of the trigger signal and releasing the light quantity limitation by the light quantity limiting means 90 on the basis of the received command for the measurement operation.SELECTED DRAWING: Figure 3

A display device includes a display panel which includes a display area including a plurality of pixels; a touch sensing unit disposed on a front surface of the display panel; a display driving circuit, configured to drive the pixels of the display area based on display control firmware; and a touch driving circuit configured to drive touch electrodes of the touch sensing unit based on touch driving firmware, and further configured to generate touch coordinate data, wherein the display control firmware and the touch driving firmware are initialized or changed according to a comparison result between a flicker noise detection value of the display area and a reference flicker noise detection value, wherein the flicker noise detection value is determined by measuring a change in luminance over time of a flicker detection pattern displayed in the display area.

A method and apparatus for estimating capacity of a system including an energy generation system, an energy storage system or both. The method and apparatus initially estimate the system capacity based on a facility location and size. The initial estimate may be adjusted through adjustment of at least one parameter. An updated capacity estimate is generated and displayed.

One aspect of the present disclosure comprises a method for calibrating a drive level of a non-radioactive calibration source. Another aspect of the present disclosure comprises a method for using a non-radioactive calibration source to verify correct operation of a radiation detector. Another aspect of the present disclosure comprises a radiation detection system that comprises a radiation detector and a non-radioactive calibration source that is used to verify correct operation of the radiation detector.

To provide a technique capable of estimating a camera position without having high processing performance.SOLUTION: An optical wireless communication system includes a plurality of light sources, a receiving device including an event camera, and an information processing device. Each of the plurality of light sources transmits an optical wireless communication signal. The receiving device receives the optical wireless communication signal via the event camera. The optical wireless communication signal includes position-related information for identifying a position in an absolute coordinate system of a transmission source of the optical wireless communication signal. The information processing device identifies a signal region of the optical wireless communication signal in an image plane coordinate system of an image plane obtained by the event camera to acquire a light source image position indicating a position at which each of the plurality of light sources is projected in the image plane coordinate system, acquires a light source absolute position indicating a position at which each of the plurality of light sources is located in the absolute coordinate system on the basis of the position-related information included in the optical wireless communication signal, and uses the light source image position and the light source absolute position to estimate a position and a direction of the event camera in the absolute coordinate system.SELECTED DRAWING: Figure 1