APPARATUS AND METHOD FOR IN-SITU CALIBRATION OF A PHOTOACOUSTIC SENSOR

    公开(公告)号:US20220155261A1

    公开(公告)日:2022-05-19

    申请号:US17591714

    申请日:2022-02-03

    Abstract: An apparatus for in-situ calibration of a photoacoustic sensor includes a measurement device configured to measure an electric signal at an IR emitter of the photoacoustic sensor, wherein the IR emitter generates an electromagnetic spectrum based on the electric signal; and a calibration unit including processing circuitry, configured to compare the electric signal with a comparison value to generate a comparison result used as calibration information. When performing the in-situ calibration, the calibration unit is configured to adjust the electric signal based on the calibration information, or the calibration unit is configured to process an output signal of the photoacoustic sensor based on the calibration information to obtain an adjusted output signal of the photoacoustic sensor.

    Photoacoustic measurement systems and methods using the photoacoustic effect to measure emission intensities, gas concentrations, and distances

    公开(公告)号:US10996201B2

    公开(公告)日:2021-05-04

    申请号:US16227950

    申请日:2018-12-20

    Abstract: An apparatus containing an optical emitter configured to emit optical radiation is provided. Further, the apparatus includes a first hermetically sealed measurement cell filled with a first gas. The first gas is configured to absorb the optical radiation at least partially at one or more predetermined wavelengths. Additionally, the apparatus includes a first microphone arranged in the measurement cell and configured to generate a first microphone signal on a basis of a photoacoustic excitation of the first gas by the optical radiation. The apparatus moreover includes an evaluation circuit configured to take the first microphone signal as a basis for generating a first measurement signal indicating an emission intensity of the optical emitter at the one or more predetermined wavelengths.

    PHOTOACOUSTIC SENSOR, METHOD FOR CHECKING A GAS-TIGHTNESS, AND SYSTEM

    公开(公告)号:US20190170702A1

    公开(公告)日:2019-06-06

    申请号:US16203859

    申请日:2018-11-29

    Abstract: An example of a system comprises a volume filled with a gas, a gas excitation device configured to excite the gas inside the volume, a microphone configured to output a microphone signal on the basis of the gas excited by the gas excitation device, and a testing unit configured to take the microphone signal as a basis for testing a gas-tightness of the volume. An example of a photoacoustic sensor comprises a hermetically sealed sensor cell, a gas excitation device and a testing unit configured to take the microphone signal dependent on the thermally excited gas as a basis for testing a gas-tightness of the sensor cell. One example comprises a method for testing a gas-tightness of a volume filled with a gas.

    DEVICE AND CURRENT SENSOR FOR PROVIDING INFORMATION INDICATING A SAVE OPERATION OF THE DEVICE OF THE CURRENT SENSOR
    8.
    发明申请
    DEVICE AND CURRENT SENSOR FOR PROVIDING INFORMATION INDICATING A SAVE OPERATION OF THE DEVICE OF THE CURRENT SENSOR 审中-公开
    用于提供信息的装置和电流传感器,用于指示电流传感器装置的保存操作

    公开(公告)号:US20170074961A1

    公开(公告)日:2017-03-16

    申请号:US15358234

    申请日:2016-11-22

    Abstract: An example of a device comprises a signal generator to generate a signal causing a magnetic self test field for a magneto-resistive sensing element. A signal input is configures to receive a first sensor signal at a first time instant before the magnetic self test field is applied and a second sensor signal at a second time instant after the magnetic self test field is applied. An evaluation circuit is configured to determine information indicating a safe operation based on an evaluation of the first sensor signal and the second sensor signal.

    Abstract translation: 装置的示例包括信号发生器,用于产生用于磁阻检测元件的磁自检场的信号。 信号输入被配置为在施加磁自检场之前的第一时刻接收第一传感器信号,并且在施加磁自检测场之后的第二时刻的第二传感器信号。 评估电路被配置为基于第一传感器信号和第二传感器信号的评估来确定指示安全操作的信息。

    Device and current sensor for providing information indicating a safe operation of the device of the current sensor
    9.
    发明授权
    Device and current sensor for providing information indicating a safe operation of the device of the current sensor 有权
    用于提供指示电流传感器的装置的安全操作的信息的装置和电流传感器

    公开(公告)号:US09507005B2

    公开(公告)日:2016-11-29

    申请号:US14197702

    申请日:2014-03-05

    Abstract: An example of a device comprises a signal generator to generate a signal causing a magnetic self test field for a magneto-resistive sensing element. A signal input is configures to receive a first sensor signal at a first time instant before the magnetic self test field is applied and a second sensor signal at a second time instant after the magnetic self test field is applied. An evaluation circuit is configured to determine information indicating a safe operation based on an evaluation of the first sensor signal and the second sensor signal.

    Abstract translation: 装置的示例包括信号发生器,用于产生用于磁阻检测元件的磁自检场的信号。 信号输入被配置为在施加磁自检场之前的第一时刻接收第一传感器信号,并且在施加磁自检测场之后的第二时刻的第二传感器信号。 评估电路被配置为基于第一传感器信号和第二传感器信号的评估来确定指示安全操作的信息。

    Apparatus and method for in-situ calibration of a photoacoustic sensor

    公开(公告)号:US11630087B2

    公开(公告)日:2023-04-18

    申请号:US17591714

    申请日:2022-02-03

    Abstract: An apparatus for in-situ calibration of a photoacoustic sensor includes a measurement device configured to measure an electric signal at an IR emitter of the photoacoustic sensor, wherein the IR emitter generates an electromagnetic spectrum based on the electric signal; and a calibration unit including processing circuitry, configured to compare the electric signal with a comparison value to generate a comparison result used as calibration information. When performing the in-situ calibration, the calibration unit is configured to adjust the electric signal based on the calibration information, or the calibration unit is configured to process an output signal of the photoacoustic sensor based on the calibration information to obtain an adjusted output signal of the photoacoustic sensor.

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