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Method for adjusting signal intensity and equipment

A technology of signal strength and adjustment method, which is applied in the field of optical instruments, can solve the problems of increased noise, lower signal-to-noise ratio, and lower signal-to-noise ratio of the subsequent system, and achieve high signal-to-noise ratio, convenient adjustment, and high signal-to-noise ratio Effect

Inactive Publication Date: 2011-06-29
TIANJIN TUOPU INSTR
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Problems solved by technology

The traditional simple automatic gain compensation method has great limitations. If the gain is too large, the noise will be significantly increased while the signal is enhanced, and the signal-to-noise ratio will be reduced; if the gain is too low, the noise introduced by the post-stage system will increase significantly, and the signal-to-noise ratio will also be reduced. Compare

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  • Method for adjusting signal intensity and equipment
  • Method for adjusting signal intensity and equipment
  • Method for adjusting signal intensity and equipment

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Embodiment Construction

[0021] The present invention will be described in detail below in conjunction with specific examples.

[0022] The adjusting method of signal intensity of the present invention comprises the following steps:

[0023] (1) Set the slit at the spectral bandwidth position required by the user.

[0024] (2) Set the gain adjustment range of the automatic gain adjustment system to 1-100.

[0025] (3) The automatic gain adjustment system detects the energy value currently received by the optical receiver, amplifies it and sends it to the adjustment controller, and the adjustment controller judges that if the energy value is lower than or higher than the set threshold, it will output a control command to the automatic gain Adjust the system to vary the overall gain value until the converted energy reaches the threshold criterion.

[0026] (4) If the converted energy cannot reach the threshold when the gain reaches the maximum value, the signal strength adjustment controller outputs a...

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Abstract

The invention discloses a method for adjusting signal intensity and equipment. The invention aims to provide a method for adjusting signal intensity and equipment, which can realize the signal intensity adjustment through the matching of automatic gain adjustment and automatic slit adjustment, so that all spectrum sections have higher signal-to-noise ratios. A slit is set at the light spectrum bandwidth position required by a user; the gain adjustment range of an automatic gain adjustment system is set as 1-100; the automatic gain adjustment system is used for detecting the energy value received by a light receiver at present, amplifying the energy value, and transmitting the energy value into an adjustment controller; the adjustment controller is used for judging whether the energy value is lower than or higher than the set threshold value, a control command is outputted to the automatic gain adjustment system to change the overall gain value until the converted energy reaches the threshold value standard; and if the gain value reaches the maximum value, and the converted energy can not reach the threshold value standard, the signal intensity adjustment controller outputs a control command to control a slit servo motor to drive the slit to be opened until the converted energy reaches the thresholds value range.

Description

technical field [0001] The invention relates to the field of optical instruments, and more specifically, relates to a method for adjusting signal strength used in an ultraviolet-near-infrared spectrophotometer and an integrated system of automatic gain and automatic slit servo. Background technique [0002] The wavelength scanning range of the ultraviolet-near-infrared spectrophotometer is 175-3300nm. In the near-infrared region of 860-3300nm, because the spectrophotometer uses double monochromators and the optical path is long, the energy difference of the spectrum emitted by the light source in the near-red band In addition, the sensitivity of the lead sulfide receiver is not uniform in this range. In order to obtain ideal absorbance lines at both higher energy and lower energy, it is necessary to perform real-time monitoring of the overall sensitivity of the instrument. compensate. The traditional simple automatic gain compensation method has great limitations. If the ga...

Claims

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Application Information

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IPC IPC(8): G01J3/02G01J3/04
Inventor 常敬
Owner TIANJIN TUOPU INSTR
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