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PID (proportion integration differentiation) feedback based predistortion correction method and LED (light emitting diode) junction temperature measurement method

A technology of pre-distortion and feedback resistance, applied in the field of LED junction temperature measurement based on digital PID feedback pre-distortion correction, can solve the problem of accurate measurement of LED junction temperature by infrared imaging method, thermocouple bonding, and inaccurate measurement of junction temperature. temperature and other issues to achieve the effect of non-contact temperature measurement

Inactive Publication Date: 2015-04-15
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

However, at present, in terms of temperature measurement, there is no breakthrough in the temperature measurement technology for LED junction temperature measurement in a confined space. The traditional temperature measurement methods include pin temperature measurement method, infrared imaging method, etc.
Obviously, the pin method cannot accurately measure the junction temperature because the thermocouple cannot be bonded to the LED lamp in the airtight glass bulb, and the infrared imaging method cannot accurately measure the LED junction temperature through the glass shell.

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  • PID (proportion integration differentiation) feedback based predistortion correction method and LED (light emitting diode) junction temperature measurement method
  • PID (proportion integration differentiation) feedback based predistortion correction method and LED (light emitting diode) junction temperature measurement method
  • PID (proportion integration differentiation) feedback based predistortion correction method and LED (light emitting diode) junction temperature measurement method

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[0043] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0044] Such as figure 1 As shown, the present invention provides a method for correcting pre-distortion based on PID feedback, comprising the following steps:

[0045] (1) Extract the positive half amplitude of the power amplifier output signal, and subtract the positive half amplitude corresponding to the set amplification factor K value to obtain the positive half error value. The error valu...

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Abstract

The invention discloses a PID (proportion integration differentiation) feedback based predistortion correction method. The method includes: respectively extracting a positive half amplitude, a negative half amplitude and a direct-current component of an acquired output signal of a power amplifier, and respectively performing PID feedback correction to enable the output signal of the power amplifier to keep stable along with change of time. In addition, on the premise of stable output of the power amplifier, a magnetic nanoparticle based non-contact temperature measurement method is applied to high-power LED (light emitting diode) junction temperature measurement. According to the PID feedback based predistortion correction method, amplification factor of the power amplifier is adjusted in real time to enable the positive half amplitude, the negative half amplitude and the direct-current component of the output signal of the power amplifier to keep stable along with change of time, and measurement basis is provided for long-time LED junction temperature measurement.

Description

technical field [0001] The invention belongs to the technical field of power amplifier (PA) output stability, and more specifically, relates to a method for pre-distortion correction based on PID feedback, so as to stabilize the amplification factor of the PA output signal, and more specifically, relates to a method based on A digital PID feedback type pre-distortion correction LED junction temperature measurement method. Background technique [0002] When the power amplifier inputs a standard sinusoidal signal, the output will become a non-standard sinusoidal signal due to the nonlinearity of the power amplifier itself and the inappropriate static operating point, resulting in nonlinear distortion and making the positive and negative halves asymmetrical. At present, commonly used methods for nonlinear distortion of power amplifiers are power back-off method, pre-distortion correction method, and feedback method. The power back method is the most commonly used method, which...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/26G06F19/00
Inventor 黄志兴张朴刘文中杜中州魏凯
Owner HUAZHONG UNIV OF SCI & TECH
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