Method and device for monitoring the condition of a medium
A technology of medium and equipment, applied in the field of monitoring the condition of the medium in the channel, can solve problems that do not involve measuring electronic devices
Inactive Publication Date: 2012-05-09
MOVENTAS OY
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Problems solved by technology
However, this publication does not address the arrangement of the measurement electronics associated with the device, which is challenging due to eg the temperature conditions of the medium
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[0073] According to another embodiment, a digital reduction of the measurement signal offset can already be carried out in the measuring head 12 , so that a stabilized / (digitally) calibrated measurement signal is obtained. Several sensor devices 10 according to the invention can be connected together in series. Digital transmission can be managed using, for example, a MODBUS bus from the sensor connector interface 46 at the end of the housing 14 .
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Abstract
The invention relates to a method for monitoring the condition of a medium (50), based on the transmission / emission of light in a channel (33), in which - a light is conducted through a medium layer defined by a measuring gap (13.1) in a measuring head (12) pushed in from an opening (31) in the wall (30) of the channel (33), - the intensity of the light, or a variable proportional to it is measured through the medium layer, and - the condition of the medium is evaluated, using measuring electronics (15), from the intensity of the change, according to set criteria. The measurement is performedusing a sensor (10) with a compact measuring head, in which the measuring electronics (15) are essentially outside the channel (33), and in which the light is conducted to the measuring gap and away from the measuring gap by optical-fibre means (18, 18.1, 18.2). In addition, the invention also relates to a corresponding device (10).
Description
technical field [0001] The invention relates to a method for monitoring the condition of a medium in a channel according to the transmission / emission of light, wherein [0002] - the light is guided through the medium layer defined by the measuring gap (gap) in the measuring head which is pushed in from the opening in the channel wall, [0003] - measuring the intensity of light passing through the dielectric layer or a variable proportional thereto, and [0004] - Evaluation of the condition of the medium from the change in intensity with the measuring electronics, according to the criteria set for the condition of the medium. [0005] Furthermore, the invention also relates to corresponding devices. Background technique [0006] There are two main grades of lubricating and hydraulic fluids, mineral and synthetic. The pressure resistance of the oil, the temperature dependence of its viscosity and many other properties are improved by using various additives. Synthetic o...
Claims
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IPC IPC(8): G01N21/85
CPCG01N2201/0662G01N21/8507G01N21/15G01N33/2888
Inventor J·万哈宁M·林吉奥P·图尔马J·科尔皮-托莫拉K·劳伯格J·埃尔夫斯特罗姆
Owner MOVENTAS OY