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    Self-checking photoelectric sensor and method of operation
    141.
    发明授权
    Self-checking photoelectric sensor and method of operation 有权

    公开(公告)号：US11754438B2

    公开(公告)日：2023-09-12

    申请号：US17651308

    申请日：2022-02-16

    申请人： Alcon Inc.

    发明人： Christopher Carl Jung

    IPC分类号： G01J1/02 ,  A61F9/007 ,  G01J1/08 ,  G01N21/94 ,  G01N21/15

    CPC分类号： G01J1/0228 ,  A61F9/00736 ,  G01J2001/083 ,  G01N21/15 ,  G01N21/94 ,  G01N2021/157 ,  G01N2021/945 ,  G01N2201/062

    摘要： Certain embodiments provide a self-checking photoelectric sensor that is configured to determine a characteristic (e.g., an amount of blockage and/or wellness/decay) of an optical pathway (e.g., an electro-optical pathway). An example method generally includes increasing, over a time period that starts at a first time, a current input to a light emitting element (LEE). The method generally includes receiving, by a light detection element, an output of the LEE via the optical pathway during the time period. The method generally includes converting, during the time period, the LEE output to a voltage output. The method generally includes determining a second time in the time period when the voltage output crosses a threshold. The method generally includes determining the characteristic of the optical pathway between the LEE and the light detection element based on a difference between the second time and the first time.

    CLEANING DEVICE FOR CLEANING AN OUTER PORTION OF A SENSOR
    142.
    发明公开
    CLEANING DEVICE FOR CLEANING AN OUTER PORTION OF A SENSOR 审中-公开

    公开(公告)号：US20230184670A1

    公开(公告)日：2023-06-15

    申请号：US18064996

    申请日：2022-12-13

    申请人： Endress+Hauser Conducta GmbH+Co. KG

    发明人： Hans Meyer ,  Alejandro Vaca Torres ,  Marvin Buchfink

    IPC分类号： G01N21/15

    CPC分类号： G01N21/15 ,  G01N2021/151 ,  G01N2021/152

    摘要： A cleaning device for cleaning an outer portion of a sensor includes: a pump connected to an air supply line; a pressure accumulator connected to the pump in a housing of the cleaning device, which can be mounted on the sensor; and an exhaust air duct with a pressure-controlled valve connected to the pressure accumulator and connected to at least one nozzle which is aligned on the outer portion to be cleaned. The cleaning device is configured to perform pressure-surge cleaning operations in which air drawn in by the pump is compressed in the pressure accumulator, and the compressed air in the pressure accumulator is expelled as a pressure surge via the at least one nozzle when pressure exerted by the compressed air enclosed in the pressure accumulator exceeds a pressure value required to temporarily open the pressure-controlled valve.

    WATER QUALITY SENSING
    143.
    发明申请
    WATER QUALITY SENSING 审中-公开

    公开(公告)号：US20190242864A1

    公开(公告)日：2019-08-08

    申请号：US16327821

    申请日：2017-08-24

    申请人： RS HYDRO LIMITED

    发明人： Robert STEVENS ,  Kieran KHAMIS

    IPC分类号： G01N33/18 ,  G01N21/15 ,  G01N21/53 ,  G01N21/64 ,  G01N21/85

    CPC分类号： G01N33/1806 ,  G01N21/15 ,  G01N21/53 ,  G01N21/6486 ,  G01N21/85 ,  G01N2021/152 ,  G01N2021/8557

    摘要： A water quality sensor comprising a fluorescence sensor arrangement 16 operable to measure a fluorescence intensity, a temperature sensor 22 and a turbidity sensor 24, the outputs of which are used in combination to derive a value for the BOD concentration of a sample, wherein the output of the temperature sensor 22 is used to apply a correction to the sensed fluorescence intensity value using the equation F ref = F mes 1 + ρ  ( T mes - T ref ) where F is the fluorescence intensity signal, T is temperature (° C.), and the subscripts mes and ref represent the measured and reference values respectively, and ρ is a temperature compensation coefficient.

    WATER QUALITY SENSOR
    144.
    发明申请
    WATER QUALITY SENSOR 审中-公开

    公开(公告)号：US20190212250A1

    公开(公告)日：2019-07-11

    申请号：US15864571

    申请日：2018-01-08

    申请人： SOLTEAM OPTO, INC.

    发明人： Chun-Yen Wu ,  Fu-Min Liang ,  Cheng-Ting Wu ,  Chia-Hao Chang ,  Chin-Feng Chen

    IPC分类号： G01N21/15 ,  G01N21/49 ,  G01N21/59

    CPC分类号： G01N21/15 ,  G01N21/49 ,  G01N21/59 ,  G01N2201/022

    摘要： A water quality sensor includes a housing including a light transmissive bucket mounted in an electrical washing appliance and a light transmissive inner barrel mounted in the bucket, an actuation module mounted in the inner barrel for detecting a water quality of a washing solution in the electrical washing appliance. Thus, if the bucket is cracked during manufacturing or due to a collision, the contact actuation module can still be well protected by the inner barrel, so that the washing solution in the electrical washing machine does not directly flow into contact with the actuation module to cause an accidental short circuit of the circuit substrate of the actuation module, improving the water resistance and service life of the water quality sensor.