TEMPERATURE MEASUREMENT METHOD AND APPARATUS BASED ON PASSIVE RFID TAG

    公开(公告)号:US20240295446A1

    公开(公告)日:2024-09-05

    申请号:US18570703

    申请日:2021-06-18

    CPC classification number: G01K11/00 G06K19/0717 G06K19/0723

    Abstract: A temperature measurement method based on a passive RFID tag. The method comprises: acquiring a circuit temperature feature of a tag multiple times, and establishing a tag temperature-feature correspondence; and estimating, by using the tag temperature-feature correspondence and the current circuit temperature feature of the tag, the temperature of an environment where the tag is located, wherein the circuit temperature feature of the tag is the persistence time within which a passive RFID tag can operate normally during a discharging process after the tag is fully charged. By means of the method, a robust and accurate temperature measurement is achieved, and a tag can be directly deployed on an existing commercial RFID device without modifying the hardware of the tag and a reader.

    MEASUREMENT OF DISSOLVED OXYGEN USING OPTICAL RADIATION INDUCED LUMINESCENCE

    公开(公告)号:US20240192130A1

    公开(公告)日:2024-06-13

    申请号:US18222893

    申请日:2023-07-17

    Abstract: Methods and apparatus for analyzing optical measurements to determine whether a liquid includes dissolved oxygen, to determine a predicted concentration of the dissolved oxygen in the liquid, and/or to determine additional or alternative feature(s) related to dissolved oxygen in the liquid. An optical source can be controlled to emit optical radiation into a container that contains the liquid. The optical source can be located outside of the container, and the optical radiation includes (e.g., is restricted to) radiation that conforms to a dissolved oxygen absorption band. The optical radiation can be pulsed or can be periodically intensity modulated. A photodetector, located outside of the container but in optical communication with the interior of the container, can generate the optical measurements used in the analysis.

    STRUCTURAL TEMPERATURE SELF-MONITORING SYSTEM BASED ON CHIRAL STRUCTURED SHAPE MEMORY POLYMER

    公开(公告)号:US20240094062A1

    公开(公告)日:2024-03-21

    申请号:US18486150

    申请日:2023-10-12

    CPC classification number: G01K11/00

    Abstract: A structural temperature self-monitoring system based on a chiral structured shape memory polymer microporous plate, comprising a fixing apparatus, a chiral structured microporous plate, and a triboelectric nanogenerators set. Each chiral element of microporous plate is provided with a hexagonal cell and six chiral legs, and the microporous plate may occur specific deformation under certain conditions. The microporous plate is fixed on the fixed apparatus, and the triboelectric nanogenerators set comprises two lateral sliding mode triboelectric nanogenerators that are symmetrically distributed; the data of deformation of chiral structured microporous plate in converse directions is collected; and a voltage is emerged for measurement. The system can monitor the temperature of any portion of structure without an external power supply, and obtain the temperature data possessing both timeliness and accuracy under the condition of ensuring the integrity and representativeness of temperature data.

    TIME TEMPERATURE INDICATION MODULE
    5.
    发明公开

    公开(公告)号:US20230258508A1

    公开(公告)日:2023-08-17

    申请号:US18306641

    申请日:2023-04-25

    Applicant: TTI CO., LTD.

    CPC classification number: G01K11/00

    Abstract: The present invention relates to a time-temperature indicating module that causes a spread material whose degree of diffusion changes with temperature change to be absorbed and diffused into a diffusion material through induction of a crack, guides a diffusion direction of the spread material through a guide line printed in a longitudinal direction of the diffusion material and also enables a clear start time point of diffusion to be displayed.

    FARADAY CURRENT AND TEMPERATURE SENSORS
    8.
    发明申请

    公开(公告)号:US20180094988A1

    公开(公告)日:2018-04-05

    申请号:US15677808

    申请日:2017-08-15

    CPC classification number: G01K11/32 G01K11/00 G01R15/246

    Abstract: This patent application discloses techniques and devices for sensing or measuring electric currents and/or temperature based on photonic sensing techniques. An optical current sensor head is located near or at a current-carrying conductor so that a magnetic field associated with the current is present at a Faraday material and the optical detection unit detects the light from the Faraday material to determine a magnitude of the current. An optical temperature sensor head is located near or at a location so that the temperature at a temperature-sensing Faraday material is reflected by the optical polarization rotation which is detected to determine the temperature.

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