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OD detector sensor

A sensor and detector technology, used in instruments, scientific instruments, measuring devices, etc., can solve the problems of long transmitted light path, large occupied area, short range, etc., and achieve high detection efficiency, small occupied area, and good accuracy. Effect

Active Publication Date: 2021-04-23
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the above-mentioned disclosed OD detector has defects. The device composed of the emitting source and the receiving source occupies a large area; if it is necessary to detect the cell concentration in other positions, it can only be multiplexed in parallel; the detection needs to be carried out in a relatively dark environment. Otherwise, it will be affected by light of other wavelengths; the measuring range is short; the optical path of transmitted light is long, etc.

Method used

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Examples

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Embodiment 1

[0032] like figure 1 The shown OD detector sensor includes a detection circuit board 1, a light source 2 and a photodetector 3. The light source 2 and the photodetector 3 are installed on the detection circuit board 1. The light source 2 emits light waves with a wavelength range of 850nm-1400nm to the object to be measured. The photodetector 3 receives reflected light waves; the receiving end of the photodetector 3 is provided with a filter 31 to block light waves with a wavelength ≤ 850nm, so that the photodetector 3 receives wavelengths in the range of 850nm-1400nm.

[0033] The connection detection module includes a detection switch 4 and a detection prompt light; the detection switch 33 is arranged on the front cover, and the detection prompt light is electrically connected to the detection circuit board 1; the detection switch 4 detects the switch when it is attached to the wall of the container containing the object to be tested Press down, and the lower end is electrica...

Embodiment 2

[0037] The only difference between this embodiment and embodiment 2 is that, as figure 2 As shown, it also includes a sensor housing 5, which partially seals the probe of the light source 2 and the photodetector 3; the sensor housing 5 is provided with through holes adapted to the positions of the light source 2 and the photodetector 3 respectively, and the light source and the photodetector pass through The through hole transmits light waves to the object to be measured and receives reflected light waves.

Embodiment 3

[0039] The difference between this embodiment and Embodiment 2 is that the detection circuit board 1 is provided with a light source 2 and two photodetectors 3, and the two photodetectors 3 are symmetrically distributed on both sides of the light source 2; There are three through holes, the first through hole in the middle is located in the middle of the sensor housing 5 and the attachment surface of the object to be measured, and the second through holes on both sides are symmetrically distributed on both sides of the first through hole; the light source 2 passes through the first through hole to the object to be measured. The object to be measured emits light waves; the two photodetectors 3 respectively receive reflected light waves through the second through holes.

[0040] The range of the OD detector designed in this embodiment is 0~99±0.1%.

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Abstract

The invention provides an OD detector sensor which comprises a detection circuit board, a light source and a light detector, and is characterized in that the light source and the light detector are arranged on the detection circuit board, and the light source and the light detector respectively emit light waves to an object to be detected and receive reflected light waves; and an optical filter is arranged at the receiving end of the optical detector. The OD detector sensor disclosed by the invention is large in measuring range, relatively good in accuracy and repeatability, high in detection efficiency and convenient for quickly detecting the cell concentration.

Description

technical field [0001] The invention belongs to the technical field of biological detection, in particular to an OD detector sensor. Background technique [0002] OD is the abbreviation of optical density, which means the optical density absorbed by the detected substance. It is a proper term in the detection method. The detection unit is expressed by OD value, 1OD=log10 (1 / trans), where trans is the detection The light transmittance T value of the object. When light passes through the detected object, the energy difference before and after is the energy absorbed by the detected object. At a specific wavelength, the concentration of the same detected object has a quantitative relationship with the absorbed energy. [0003] Optical density (OD) determination of bacterial cultures is a common technique used in microbiology. Researchers rely primarily on spectrophotometers for these measurements, however in reality the measurements are based on the amount of light scattered b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/00G01N15/06
Inventor 刘洋江凌刘淳张译文
Owner NANJING UNIV OF TECH