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liquid composition sensor

A sensor and liquid technology, applied in the direction of instruments, scientific instruments, analytical materials, etc., can solve the problem of detection accuracy reduction

Active Publication Date: 2016-11-23
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the number of elements in the sensor is large, and if the position of each element deviates from the proper position, the detection accuracy may decrease

Method used

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Examples

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Embodiment Construction

[0025] An optical liquid composition sensor according to an example embodiment is used to detect a composition and a concentration of the composition in a liquid. For example, when gasoline and alcohol such as ethanol are mixed into a mixed fuel, the sensor is used as a fuel characteristic sensor for detecting alcohol, water, and acetic acid in gasoline.

[0026] like figure 1 As shown, the liquid composition sensor 10 includes a light source 11 , a detection unit 12 , a spectrometer 13 and a light detector 14 . Reference numeral 100 denotes a liquid. The detection unit has a specific structure. The configuration other than the detection unit will be described below.

[0027] The light source 11 outputs infrared light. The light source 11 corresponds to an infrared light source. Here, the light source for outputting infrared light may radiate light including infrared light in a specific wavelength band. Thus, the light source may only output infrared light. Alternativel...

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Abstract

A liquid composition sensor, comprising: an infrared light source (11); a detection unit (12), the detection unit (12) comprising: two substrates (20a, 20b), made of a material for passing infrared light formed and stacked on each other; a channel (23) for flowing a liquid arranged between the facing surfaces of said substrates (20a, 20b); and a detection portion (23a) for detecting ); a spectrometer (13) for dispersing light passing through said detection unit (12); and a photodetector (14) for detecting the dispersed light. Each substrate (20a, 20b) comprises an outer side surface and a facing surface such that the two substrates (20a, 20b) provide a total of four surfaces. The detection unit (12) also includes a filter (25) for selectively passing infrared light with a predetermined wavelength. The filter (25) is arranged at a predetermined position corresponding to at least the detection portion (23a) on at least one of the four surfaces.

Description

technical field [0001] The present disclosure relates to a liquid composition sensor that uses infrared light to detect at least one constituent and the concentration of the constituent in a liquid. Background technique [0002] In general, as described in JP-A-2000-121547, a detection unit that detects a component and / or the concentration of the component in a liquid sample using light is known. [0003] The detection unit consists of two glass plates stacked, which serve as two substrates. In addition, the unit includes a liquid channel as a passage for flowing the liquid sample. A liquid channel is formed between one surface of one glass plate and the facing surface of the other glass plate. [0004] Here, liquids such as gasoline, water, alcohols (eg ethanol) and acetic acid have absorption wavelengths in the mid-infrared band between 3 microns and 10 microns. Thus, with the detection unit described in JP-A-2000-121547, a liquid component sensor using infrared light i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/3577G01N21/01G01N21/35
CPCG01N21/0303G01N21/3577G01N21/27
Inventor 山下秀一和户弘幸松井崇行三浦笃志
Owner DENSO CORP
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