CN108169147A - 用于调整测量设备的方法 - Google Patents

用于调整测量设备的方法 Download PDF

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CN108169147A
CN108169147A CN201711169938.6A CN201711169938A CN108169147A CN 108169147 A CN108169147 A CN 108169147A CN 201711169938 A CN201711169938 A CN 201711169938A CN 108169147 A CN108169147 A CN 108169147A
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measuring apparatus
measurement sensor
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CN108169147B (zh
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弗兰克·米勒
彼得·林德穆勒
丹尼尔·伊滕
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Endress and Hauser SE and Co KG
Endress and Hauser Conducta GmbH and Co KG
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/27Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
    • G01N21/274Calibration, base line adjustment, drift correction
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/27Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
    • G01N21/274Calibration, base line adjustment, drift correction
    • G01N21/278Constitution of standards
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01Arrangements or apparatus for facilitating the optical investigation
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/59Transmissivity
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00Features of devices classified in G01N21/00
    • G01N2201/12Circuits of general importance; Signal processing
    • G01N2201/127Calibration; base line adjustment; drift compensation

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  • General Health & Medical Sciences (AREA)
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Abstract

本发明涉及用于调整测量设备的方法。本发明的方法包括:基于由测量传感器在校准溶液中检测的至少一个测量信号的测量设备的实验室校准,基于由测量传感器在空气中检测的至少一个测量信号的测量设备的实验室校准,校正因子的确定,其用于将基于由测量传感器在空气中检测的至少一个测量信号的测量设备的实验室校准值校正到基于由测量传感器在至少一种校准溶液中检测的至少一个测量信号的测量设备的实验室校准值,基于由测量传感器在空气中检测的至少一个测量信号的测量设备的现场校准,通过校正因子对基于由测量传感器在空气中检测的至少一个测量信号的测量设备的现场校准值的校正,通过经校正的现场校准值进行的测量设备的调整,特别是现场调整。

Description

用于调整测量设备的方法
技术领域
本发明涉及一种用于调整测量设备的方法,该测量设备通过至少一个测量传感器来测量介质的被测变量。
背景技术
光学吸收测量需要用于确定诸如消光和随后的透射、吸收等物理变量的实验室校准值。该实验室校准值通常是在优选去离子水或超纯水的液体校准溶液中进行确定的。
调整实验室校准值以补偿传感器在其生命周期的任何系统变化对于获得正确的测量是至关重要的。为此,必须提供液体校准溶液。
实验室校准的质量很大程度上取决于校准溶液的质量。不能始终保证在现场可获得优质的去离子水或超纯水。因此,这些需要由客户或服务人员提供。来自受污染容器的夹带材料是可能的。此外,为了获得满意的结果,测量系统和校准溶液必须处于热力学平衡。取决于应用和两个系统之间的温度差异,这可能需要花费几分钟的时间。
发明内容
本发明的目的是提出一种可以在短时间内执行的用于调整测量设备的方法。
本发明的目的通过本发明的主题来实现。本发明的主题是一种用于调整测量设备的方法,该测量设备通过至少一个测量传感器来测量介质的被测变量,其中所述方法包括:
-基于由测量传感器在校准溶液中所检测到的至少一个测量信号进行的测量设备的实验室校准,
-基于由测量传感器在空气中所检测到的至少一个测量信号进行的测量设备的实验室校准,
-校正因子的确定,其用于将基于由测量传感器在空气中所检测到的至少一个测量信号的测量设备的实验室校准值校正到基于由测量传感器在至少一种校准溶液中所检测到的至少一个测量信号的测量设备的实验室校准值,
-基于由测量传感器在空气中所检测到的至少一个测量信号进行的测量设备的现场校准,
-通过校正因子对基于由测量传感器在空气中所检测到的至少一个测量信号的测量设备的现场校准值进行的校正,
-通过经校正的现场校准值进行的测量设备的调整,特别是现场调整。
测量技术中的校准是一种测量过程,用于可靠、可再现的确定并记录测量设备与在这种情况下被指定为正常的另一设备的偏差。“调整”被理解为有可能通过专业化流程对测量设备进行的最精确调整。
为了规避校准溶液的不稳定性,对于测量传感器,使用光学吸收测量方法将实验室校准值调整到空气。可以通过使用将水中的实验室校准值与相关的空气中的实验室校准值相关联的校正因子在水和空气中进行调整。依赖于系统的校正函数最初在实验室校准中进行确定并保存在传感器中。
由于空气的质量是近似恒定的,因此该方法降低了采用污染的校准溶液时对误差的敏感性。此外,由于空气和待调整的测量设备之间的温度差通常小于待调整的测量设备和校准溶液之间的温度差,因此大大减少了所需的调整时间。
根据一个有利的变型,至少一种校准溶液是水、特别是超纯水或去离子水。
根据一个有利的扩展,测量传感器通过光学吸收方法测量介质的被测变量。
具体实施方式
用于调整测量设备的方法包括以下的方法步骤。首先,进行测量设备的实验室校准。这包括以下的方法步骤。首先,将实验室中的测量传感器浸入作为校准溶液的水中,并且检测测量传感器的测量信号。通过检测到的测量信号在水中确定实验室校准值。然后,在空气中确定测量传感器的实验室校准值。校正因子可以从水中的实验室校准值和测量传感器在空气中的实验室校准值得出,通过该校正因子,空气中的实验室校准值可以被校正为水中的实验室校准值。
紧接着实验室校准,在诸如处理工厂的使用测量传感器的位置进行现场校准,现场校准包括以下步骤。首先,在空气中检测测量传感器的测量信号,并且基于检测到的测量信号现场校准测量传感器,从而产生现场校准值。随后通过校正因子将现场校准值校正为测量传感器在水中的实验室校准值。通过经校正的现场校准值来(现场)调整测量传感器。
下面给出用于确定校正因子的具体计算示例。用作测量传感器的光电检测器在空气中提供10a.u.(用于指示光电检测器上的光强度的任意单位)和8a.u.的测量信号。因此,测量设备在水中的实验室校准值为10a.u.,并且测量设备在空气中的实验室校准值为8a.u。这是在工厂装配之前在实验室中最初确定的。这产生了10a.u/8a.u.=1.25的校正因子。

Claims (3)

1.一种用于调整测量设备的方法,所述测量设备用于通过至少一个测量传感器来测量介质的被测变量,其中所述方法包括:
基于由所述测量传感器在校准溶液中所检测到的至少一个测量信号进行的所述测量设备的实验室校准,
基于由所述测量传感器在空气中所检测到的至少一个测量信号进行的所述测量设备的实验室校准,
校正因子的确定,所述校正因子用于将基于由所述测量传感器在空气中所检测到的至少一个测量信号的所述测量设备的实验室校准值校正到基于由所述测量传感器在至少一种校准溶液中所检测到的至少一个测量信号的所述测量设备的实验室校准值,
基于由所述测量传感器在空气中所检测到的至少一个测量信号进行的所述测量设备的现场校准,
通过所述校正因子,对基于由所述测量传感器在空气中所检测到的至少一个测量信号的所述测量设备的现场校准值进行的校正,
通过经校正的现场校准值进行的所述测量设备的调整,特别是现场调整。
2.根据权利要求1所述的方法,其中所述至少一种校准溶液是水,特别是超纯水或去离子水。
3.根据权利要求1或2所述的方法,其中所述测量传感器通过光学吸收方法测量所述介质的被测变量。
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