36results about "Time interval measurement" patented technology

The invention discloses a time interval measurement system based on a high-speed video collector, belongs to the technical field of time interval measurement and metering traceability, and aims at solving the problems that in the prior art, time interval measurement triggering is not synchronous, errors are large, and visual triggering equipment is difficult to calibrate accurately. The system adopts a synchronous staggered double-high-speed camera to collect visual information of a device under test (DUT) and an external standard time interval instrument; embedding traceable first electronic timestamp information for each frame of acquired image based on the electric signal of the standard instrument; meanwhile, starting and stopping event characteristics of the DUT and visual display readings of the standard instrument are automatically recognized through an artificial intelligence (AI) model, a second visual time information source is obtained, and the system calculates the accurate time when an event occurs through a sub-frame-level time interpolation algorithm; and executing dual redundancy cross validation between the first electronic timestamp information and the second visual time information, calculating a high-precision time interval on the basis of validation, and evaluating the uncertainty of the high-precision time interval.

The present application discloses a control method and apparatus for a polyhedral flip timer, a timer and a medium. The method comprises: obtaining an in-position signal of a target flip surface of a polyhedral flip timer, wherein the target flip surface is any flip surface of the polyhedral flip timer; on the basis of the in-position signal, taking a preset total duration corresponding to the target flip surface as a first total duration; on the basis of the first total duration, determining a countdown total duration as a target total duration; and on the basis of the target total duration, controlling the polyhedral flip timer to perform countdown. Therefore, as long as the target flip surface is flipped in position, the polyhedral flip timer can automatically generate the in-position signal and automatically perform countdown on the basis of the in-position signal. The countdown function is easy to operate, and the user experience is improved.

In some embodiments, an optical communication system may include a light source, a modulator, and an optical receiver. The light source may be configured to generate a beam including a series of optical pulses. The optical receiver may have a detection window duration of 1 nanosecond or less. When a first pulse passes through a variable refractive index medium, photons of the first pulse may be refracted and travel along different optical ray paths to reach the optical receiver according to a time distribution curve. The full width at half maximum (FWHM) value of the time distribution curve may be greater than the coherence time value of the first pulse, and the detection window of the optical receiver may be greater than the FWHM value of the time distribution curve.

The invention relates to the technical field of detection devices, in particular to a dispersed ink drying speed detection device which comprises a base. The housing is fixedly connected to the base; the test part group is arranged on the base; the test part group comprises a mounting frame fixedly connected to the base; the frame head is fixedly connected to the mounting frame; the test base frame is arranged in the mounting frame; the coating device is connected to the mounting frame in a sliding manner; and the first reciprocating screw rod is rotationally connected to the mounting frame. A plurality of test parts are used in the device, and the drying temperature of each test part is independently controlled, so that the device can simultaneously detect multiple groups of ink at different temperatures, the detection time is greatly shortened, the detection efficiency is effectively improved, the coater which discharges ink in a pressing contact manner is used, and the detection efficiency is improved. And the coater can uniformly distribute ink on the test base frame, so that the drying time result can more accurately reflect the ink quality.

The invention discloses an ultrasonic flight time measurement method based on GAF image coding. The method comprises the following steps: acquiring an original ultrasonic echo signal and carrying out wavelet noise reduction processing; extracting an envelope signal from the original ultrasonic echo signal subjected to wavelet noise reduction processing; the envelope signal is coded into a two-dimensional image matrix by a Gramer angle field; inputting the Gramer angle field image subjected to image standardization into an improved Swin Transform network to carry out depth feature extraction; carrying out regression calculation on a flight time estimation value according to the depth features; and outputting a material thickness or defect positioning result according to the flight time estimation value. According to the method, by fusing signal image coding and depth feature learning, the problems of noise sensitivity and limited resolution in traditional ultrasonic thickness measurement are effectively solved, the thickness measurement precision and stability are remarkably improved, and the method is particularly suitable for the nondestructive testing requirements in complex industrial scenes such as high temperature and corrosion.

The present invention presents a device for indicating at least one physical quantity and / or the passage of time and for sending it electronically. The device comprises an RFID chip (32, 41, 52, 59) and an electrochemical cell or cell group (42, 43, 45) connected to the RFID chip input. Discharging or charging of the cell or the last cell in the cell group (42, 43, 45) or a change in the charge status of the cell causes the RFID chip's (32, 41, 52, 59) so-called tamper input to turn to be logically opposite. The data is sent to a reading device with an antenna according to NFC (46), Bluetooth or UHF or LF technology. More than one cell, for example the last two (45, 42) can also be steered to the tamper input, for example in food applications. The first cell (43) can be arranged to be cut with a tear strip (44), whereby the start time of the device can be determined by the user. Said physical quantity can be temperature, relative humidity, electromagnetic radiation and / or vibration.

An IVD system comprising an IVD analyzer and an IVD consumable device configured to be used together with the IVD analyzer in order to carry out an IVD test that enables to obtain reliable test results by more reliably determining whether the IVD consumable device is within or outside of an out-of-package usability time period. In particular, the IVD analyzer comprises an optical detector for determining an optically detectable property of at least one indicator, at least one environmental sensor configured to determine a value of at least one environmental parameter affecting change of the optically detectable property over time and a controller configured to correlate the optically detected property of the at least one indicator to the determined value of the at least one environmental parameter by reference to a stored indicator-specific calibration of the optically detectable property obtained under varying values of the at least one environmental parameter.

Described are systems and methods which can be used to indicate the period of time elapsed since the occurrence of a triggering event. More particularly, this application relates to systems and methods which can be used to visually indicate the time period elapsed since an article has been removed from its packaging. The system can include an indicator disposed on or within the article and a trigger disposed within the receptacle and in contact with the indicator. The article may be enclosed within a sealable receptacle of the package. The indicator is responsive to a change in a concentration of the trigger in contact with the indicator. The removal of the article from the receptacle can induce a change in concentration of the trigger in contact with the indicator. The change in the concentration of the trigger can induce a change in color in the indicator. The color change indicates a predetermined period of time has elapsed since the article has been removed from the receptacle. The predetermined period of time is from 30 minutes to 30 days, such as from 1 hour to 30 days.

The embodiment of the invention provides a microsphere suspension property detection device and method, and belongs to the technical field of suspension liquid measurement. The device comprises a laser transmitter used for transmitting a pulse signal to the microsphere suspension, a signal receiver used for receiving a reflection signal of the microsphere suspension, and a data processing assembly used for determining the signal intensity of the reflection signal according to the transmitting time, the receiving time and the signal intensity of the reflection signal. Obtaining the accumulated semaphore returned by the microspheres of the microsphere suspension above the preset height and the total reflection semaphore returned by the microspheres in the whole height interval, and obtaining a real-time detection value; and the data output assembly is used for obtaining the suspension time according to the real-time detection value and a preset detection threshold value. Therefore, a unified judgment standard can be established for the suspension property of the microspheres, subjective judgment of operators is avoided, the suspension time of the microspheres is obtained through detection under the unified judgment standard, and the detection error of the suspension time is reduced, so that the suspension property of the microspheres is accurately evaluated, and the detection efficiency is improved.

To provide electrolytic water module life monitoring methods and monitoring systems.SOLUTION: An electrolytic water module life monitoring method includes an electrical signal detection step S101 to detect an electrical signal generated by an electrolytic water module, and a lifespan detection step S102 to present the replacement of the electrolytic water module when it is detected that the electrical signal has reached a first predetermined electrical signal or the usage time corresponding to the electrical signal has reached a predetermined usage time of the electrolytic water module. Through determining the lifespan of the electrolytic water module based on the magnitude of the electric current generated by the detected electrolytic water module, and presenting the replacement of the electrolytic water module when it is detected that the electric signal has reached the first predetermined electric signal or the usage time corresponding to the electric signal has reached the predetermined usage time of the electrolytic water module, better disinfection effect can be achieved.SELECTED DRAWING: Figure 1

A system and method for measuring the time of a moving object during at least one training exercise is disclosed. The system includes a mobile device having a camera and a time measurement computer program. After placing the mobile device in a fixed stationary viewing angle position, the camera is arranged to capture digital images and to enter an image calibration mode, an algorithm calibration mode, and a detection mode before executing a time measuring command on the computer program. The system and method utilize histogram calculation for the digital images to trigger the time measuring command and read object movement detection when threshold values are detected.

A fluid-based game timer system for use with turn-based games. The fluid-based game timer system includes a reservoir for holding a volume of fluid (such as beer), a constant flow tank to regulate the flow of the fluid through the system and to keep the flow constant or near constant, and a control assembly to direct the flow of the fluid into a particular player's cup during his / her turn.

This invention discloses an ultrasonic time-of-flight measurement method based on GAF image coding, comprising: acquiring raw ultrasonic echo signals and performing wavelet denoising processing; extracting envelope signals from the raw ultrasonic echo signals after wavelet denoising processing; encoding the envelope signals into a two-dimensional image matrix using a Gram angle field; inputting the image-normalized Gram angle field image into an improved Swin Transformer network for depth feature extraction; performing regression calculation based on the depth features to estimate the time of flight; and outputting material thickness or defect location results based on the estimated time of flight. This invention effectively solves the problems of noise sensitivity and limited resolution in traditional ultrasonic thickness measurement by fusing signal image coding and depth feature learning, significantly improving the accuracy and stability of thickness measurement, and is particularly suitable for non-destructive testing needs in complex industrial scenarios such as high temperature and corrosion.

The present invention relates to a monitoring device (10) for detecting a high temperature in a refrigerated space and / or an interruption in the cold chain. The device comprises a housing comprising a base (1) and a cover (2). A container (3) partially filled with a medium (4) is located inside the housing. A window (5) in the cover allows a portion of the container to be viewed to allow the indicator to be read. To switch from the use and reading position to the preparation position, all that is needed is to rotate the cover relative to the base.

In some embodiments, an optical communication system may include a light source, a modulator, and a light receiver. The light source may be configured to generate a beam comprising a series of light pulses. The light receiver may have a detection window duration of 1 nanosecond or less. As a first pulse travels through a variable refractive medium, photons in the first pulse may be refracted to travel along different ray paths to reach the light receiver according to a time profile. A full width at half maximum (FWHM) value of the time profile may be greater than a coherence time value of the first pulse, and a detection window of the light receiver may be greater than the FWHM value of the time profile.

An optical distance measurement or ranging apparatus is described. The apparatus includes at least one optical pulse generator (30,32; 80,94; 120,122; 180,202; 300,320) for generating a train of gating pulses and a train of probe pulses, the train of gating pulses having a different repetition rate than the train of probe 10 pulses. The gating and probe pulses may be ultrashort laser pulses generated by different free-running, mode-locked lasers. An optical probing arrangement is also provided for directing the train of probe pulses to one or more objects (42,44; 84,86; 188, 190; 232,234,236; 306,310) and for collecting returned probe pulses returned from the one or more objects. The objects may include a target object and a reference object. The apparatus comprises a multi-photon effect detector (58; 104; 140; 210; 324, 330) and is configured to direct both the train of gating pulses and the returned probe pulses to the multi-photon effect detector. The apparatus may be used for industrial inspection, machine calibration, position measurement or the like.

The invention relates to an electric barrier rising and falling time measuring method based on a neural network model. The problem that the rising and falling time of a high-speed electric barrier is not accurately measured is solved. The core of the method is that a high-speed camera is used for collecting video image data of rising and falling of the electric barrier, and an improved YOLOv5 neural network model is constructed. The model integrates an angle regression function at a detection head part so as to accurately predict the dynamic angle of the handrail; and meanwhile, a RepVGG module is introduced to optimize the reasoning speed, so that the real-time processing capability is ensured. And by adopting a CIoU angle loss function, the accuracy of angle prediction is further improved. According to the invention, a time compensation algorithm based on an optical flow method is also fused to correct a time error possibly caused by unstable video frame rate. Finally, according to a judgment mechanism that the continuous multi-frame angle change rate reaches a preset threshold value, the starting and stopping moments of the railing are accurately recognized, and therefore high-precision measurement of the rising and falling time of the electric railing machine is achieved.

Provided is a time measuring device that prevents, with a simple configuration, the timing at which the polarity of an AC voltage applied to a liquid crystal panel is inverted at a fixed polarity inversion period and the timing at which image data is written to the liquid crystal panel from overlapping. The time measurement device includes: an event retention unit that retains an event for a period between a fixed first waiting operation time immediately before the polarity of the AC voltage is reversed and a fixed second waiting operation time immediately after the polarity of the AC voltage is reversed; a display update determination unit that determines whether or not it is necessary to update the display of the liquid crystal panel by the retained event after the first waiting operation time and the second waiting operation time have elapsed; and an image data output control unit that writes, to the liquid crystal panel, image data for which it is determined that an event for updating the display of the liquid crystal panel is necessary.

The present invention provides a method and system for quickly detecting the rising and falling time of an electric barrier for charging, and relates to the technical field of electric barrier detection. The method comprises the following steps: S1, collecting an image frame set of the electric barrier at a sampling time interval by a high-speed camera; S2, inputting the image frame set into an image frame state recognition model to obtain a continuous state composed of the opening and closing states of the barrier in continuous image frames; S3, sequentially finding the partial continuous state from the first frame partially opened to fully opened or the first frame partially opened to fully closed from the continuous state, calculating the movement speed of each image frame by the cosine similarity of two adjacent image frames corresponding to the partial continuous state, and sequentially connecting the movement speeds to form a speed change set; S4, judging whether the speed change set corresponding to the partial continuous state conforms to the opening and closing state of the barrier, and if so, calculating the opening and closing time of the barrier according to the sampling time interval and the speed change set.

Systems and methods are described that can be used to indicate the amount of time that has elapsed since a trigger event occurred. More specifically, the present application relates to systems and methods that can be used to visually indicate the amount of time that has elapsed since an item was removed from its packaging. The system can include an indicator disposed on or within the item and a trigger disposed within the container and in contact with the indicator. The item can be enclosed within a sealable container of the package. The indicator responds to a change in the concentration of the trigger in contact with the indicator. Removal of the item from the container can induce a change in the concentration of the trigger in contact with the indicator. The change in the concentration of the trigger can induce a change in color in the indicator. The color change indicates that a predetermined amount of time has elapsed since the item was removed from the container. The predetermined amount of time can be between 30 minutes and 30 days, for example, between 1 hour and 30 days.

The utility model discloses an automatic timing and flow measuring barrel. Comprising a barrel body, an automatic timing device and a water level sensor, the automatic timing device is arranged on the outer side wall of the upper portion of the barrel body and comprises an infrared emitter, a reflecting plate and a timer, the infrared emitter is arranged on the outer side wall of one side of the upper portion of the barrel body, and the reflecting plate is arranged on the side wall of the other side of the upper portion of the barrel body in the mode of directly facing the infrared emitter; the water level sensor is arranged on the inner side wall of the lower part of the barrel and is in contact connection with the inner bottom surface of the barrel. According to the utility model, the timing function and the liquid measuring function are combined, the convenience of measuring the liquid flow by a single person is realized, the working efficiency is improved, the personal error is reduced, the reliability and the accuracy of data are improved, and a data storage function is provided, so that the subsequent data analysis is facilitated.

This invention discloses a method and system for determining the current time using radio observations of multiple pulsars, comprising the following steps: S1. Correcting the deviation between the local clock time and the absolute time to within a set threshold; S2. Selecting N radio pulsars, where N is greater than or equal to 4, and continuously observing the selected radio pulsars using a radio telescope to obtain observation data; S3. Processing the observation data to generate the observed pulse profile; calculating the pulsar pulse phase φ. i S4. Calculate the standard pulse profile P k With the observed pulse profile P' k The relative phase deviation δφ between i Calculate the relative phase deviation δφ with error S5. i With phase φ i deviation Δφ i S6. The deviation δT between the telescope's local clock time and absolute time is calculated, thereby determining the absolute time. This invention eliminates the need to synchronize the local clock with the absolute time of a certain time standard. It can obtain absolute time with an accuracy on the order of tens of microseconds by analyzing observed pulsars, and significantly reduces calculation time.

Provided in the present invention is a system for measuring a time-averaged value of an environmental protection parameter. The system comprises: a measurement-time timing module, which is configured to record a measurement time; an abnormal-value screening module, which is configured to acquire input analog quantity values, remove an abnormal analog quantity value and output the analog quantity values, and when an abnormal analog quantity value is detected, control the measurement-time timing module to stop timing; an analog quantity value accumulation module, which is configured to accumulate the analog quantity values output from the abnormal-value screening module; and a time-averaged value output module, which is configured to determine a time-averaged value on the basis of the total value of the analog quantity values accumulated by the analog quantity value accumulation module and the total value of measurement times recorded by an elapsed-time timer, and output the time-averaged value.

The present invention relates to the technical field of detection devices, specifically a dispersed ink drying speed detection device, comprising: a base; a cover shell fixedly connected to the base; a test part group arranged on the base; the test part group comprises: a mounting frame fixedly connected to the base; a frame head fixedly connected to the mounting frame; a test base frame arranged in the mounting frame; a coater slidably connected to the mounting frame; and a first reciprocating screw rotatably connected to the mounting frame. The present invention uses multiple groups of test part groups in the device, and sets independent control of the drying temperature of each group of test part groups, so that the present invention can simultaneously perform multiple groups of tests on the ink at different temperatures, greatly reducing the detection time and effectively improving the detection efficiency, and uses a coater that discharges ink by pressing contact, so that the coater can evenly distribute ink on the test base frame, so that the drying time result can more accurately reflect the ink quality.

This invention discloses a device, system, and method for precise time measurement of PET using lasers. The device for precise time measurement of PET using lasers includes a PET detector module, a PET digital electronics board, and a laser. The PET detector module detects gamma photons emitted by the target and sends the generated detection signal to the PET digital electronics board. The PET digital electronics board is equipped with an optoelectronic device for receiving light pulse signals and converting them into a clock reference signal. The laser generates light pulse signals and sends them to the optoelectronic device. The PET digital electronics board digitizes the received detection signal according to the clock reference signal and measures the time. This device improves upon traditional PET systems, fully leveraging the time performance advantages of the detector, electronics, and other components.

The utility model discloses time interval measuring equipment based on a high-speed video collector, and belongs to the technical field of time interval measurement and metering traceability. In order to solve the technical problems of high measurement uncertainty and incapability of accurately tracing due to difficulty in synchronous triggering of visual triggering type timing equipment, the utility model comprises at least two independently adjustable lenses and light paths, the light guide system is used for receiving and deflecting light of each light path; and a high-speed photosensitive device. The key point is that the light guide system converges light from different lenses and images the light on different areas of the single high-speed photosensitive device respectively. Visual information of a time standard source and a detected object can be synchronously recorded at a high speed through the photosensitive device, and an accurate time interval is calculated by analyzing a video key frame and combining with a known frame rate. According to the utility model, the synchronization error is effectively eliminated, the uncertainty is reduced to millisecond level, the high-precision measurement and traceability of visual trigger equipment are realized, the structure is compact, and the adjustment is convenient.

In some embodiments, an optical communication system may include an optical source, a modulator, and a photoreceiver. The optical source may be configured to generate a beam comprising a series of light pulses. The photoreceiver may have a detection window duration of 1 nanosecond or less. When a first pulse travels through a variably refractive medium, photons in the first pulse may be refracted to travel along different ray paths to arrive at the photoreceiver according to a temporal distribution curve. A full width at half maximum (FWHM) value of the temporal distribution curve may be greater than a coherence time value of the first pulse, and the detection window of the photoreceiver may be greater than the FWHM value of the temporal distribution curve.

In some embodiments, an optical communication system may include an optical source, a modulator, and a photoreceiver. The optical source may be configured to generate a beam comprising a series of light pulses each having a duration of less than 100 picoseconds. The photoreceiver may have a detection window duration of less than 1 nanosecond. When a first pulse travels through a variably refractive medium, photons in the first pulse may be refracted to travel along different ray paths to arrive at the photoreceiver according to a temporal distribution curve. A full width at half maximum (FWHM) value of the temporal distribution curve may be at least three times as large as a coherence time value of the first pulse, and the detection window of the photoreceiver may be at least six times as large as the FWHM value of the temporal distribution curve.

A method for deriving an independent current time estimate from celestial sources comprising: providing a reference measurement for a variable-intensity celestial source, wherein the reference measurement comprises the celestial source's photometric structure at a known time, at a known stellar period, and at a known periodic phase; creating a phase-folded light curve for the celestial source; measuring an intensity of the celestial source at a subsequent time; comparing the measured intensity of the celestial source to the phase-folded light curve to derive a set of possible phase differences, wherein each possible phase difference corresponds to a potential derived time based on the known time and the known stellar period of the reference measurement; and analyzing the set of possible phase differences to derive the current astrophysical time.

The present disclosure describes an electric cable accessory system for covering an electric cable and / or a cable connection. The electric cable accessory system includes a pre-expanded cable accessory unit and a time-temperature indicator associated with the pre-expanded cable accessory unit. The pre-expanded cable accessory unit includes a pre-expanded cable accessory formed from an elastomeric material and a removable holdout mounted within the elastomeric cable accessory. The holdout operates to maintain the elastomeric cable accessory in an expanded state and to allow the elastomeric cable accessory to elastically contract when the holdout is removed from the elastomeric cable accessory. The time-temperature indicator is configured to undergo a visible change in appearance in response to cumulative heat exposure, alerting an observer when the elastomeric material of the pre-expanded elastomeric cable accessory unit has experienced a threshold cumulative heat exposure. Methods including the electric cable accessory system are also described herein.