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Liquid sample detection device utilizing LED light source

A technology of LED light source and liquid sample, which is applied in the direction of measuring device, transmittance measurement, material analysis by optical means, etc., to achieve the effects of high accuracy, saving power consumption and low detection cost

Inactive Publication Date: 2012-11-28
张琪
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] For this reason, the technical problem to be solved by the present invention is that in the prior art, in order to accurately measure the LED light source, it is necessary to perform special treatment on the LED light source, thereby proposing a method that can measure the liquid without special treatment on the LED light source. Liquid sample detection device for accurate detection of substances inside the sample

Method used

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  • Liquid sample detection device utilizing LED light source
  • Liquid sample detection device utilizing LED light source
  • Liquid sample detection device utilizing LED light source

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Embodiment Construction

[0027] see figure 1 , which shows the relationship between time and brightness after the LED is powered on, where the brightness is converted into a voltage through photoelectric conversion to represent the intensity, from figure 1 It can be seen from the figure that the brightness of the LED light source reaches its peak momentarily after it is powered on, and there is a region of relatively stable brightness within the left and right intervals of the peak value. After passing through this region of relatively stable brightness, the brightness of the LED light source decays rapidly. The entire process lasts about 2 seconds before rapidly fading in brightness. This figure is just a schematic diagram of the relationship curve between time and brightness after the LED light source is powered on. Since the time distance of 2 seconds is relatively long compared to 2 milliseconds, a dotted line is set on the abscissa of the time interval of 2 seconds to illustrate This segment is ...

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Abstract

The invention discloses a liquid sample detection device utilizing an LED light source, comprising the LED light source and an optical signal collector, wherein, the LED light source is used for providing light needed in entering a liquid sample; and the optical signal collector is used for collecting the light transmittance that the LED light source passes through the liquid sample; the LED light source and the optical signal collector are controlled by one data collection controller which controls the startup of the LED light source, and controls the optical signal collector to collect the light transmittance at a preset time after the LED light source is started. The liquid sample detection device utilizing the LED light source of the invention has high-precision detection result, low cost and short detection time, and does not need special processing on the LED light source; and the service life of the LED is greatly prolonged.

Description

technical field [0001] The invention relates to a liquid sample detection device, in particular to a device for detecting substances contained in a small-mass liquid sample by using an LED light source and light transmittance. Background technique [0002] The method of using light detection to distinguish substances is a commonly used technology in the microscopic field. The usual method is to store a carrier liquid in a container, and detect the light transmittance of the carrier liquid on a light detection device, and then use the required detection Dissolve the sample substance in the carrier liquid, and then detect the light transmittance of the solution on the light detection device, and compare the main attenuation light band and the attenuation intensity of the light in this band in the test results before and after. The type of the detected sample substance is determined from the comparison result. Therefore, in order to obtain accurate detection results, a stable ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/59G01N21/01
Inventor 张琪
Owner 张琪
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