Laser sensor, background noise compensation method and electronic equipment

Abstract

The disclosure relates to a laser sensor comprises a receiving array used for converting a received optical signal into an electrical signal, wherein when an environment temperature is within a firstpreset range, the background noise of the electrical signal is positively correlative to the temperature, and when the environment temperature is within a second preset range, the background noise ofthe electrical signal is negatively correlative to the temperature; a compensation module, used for receiving the electrical signal, when the environment temperature is within the first preset range,amplifying the electrical signal with a first amplification coefficient, and when the environment temperature is within the second preset range, amplifying the electrical signal with a second amplification coefficient, wherein the first amplification coefficient is negatively correlative to the temperature, and the second amplification coefficient is positively correlative to the temperature; anda processor, used for determining a sensing signal according to the electrical signal amplified by the compensation module and the preset background noise. According to the embodiment of the invention, the background noise after compensation varies less with temperature, and the acquisition of an accurate sensing result is facilitated.

Description

technical field [0001] The present disclosure relates to the technical field of terminals, and in particular to a laser sensor, a noise floor compensation method for electrical signals, and an electronic device. Background technique [0002] When the laser sensor does not have reflective objects in the environment, the induction signal that can still be generated is called the floor noise. The floor noise is mainly generated by the laser signal reflected by the protective glass set on the laser sensor and the light signal in the environment. . [0003] In order to obtain an accurate induction signal, in order to reduce the influence of the noise floor in the calculation process, the estimated noise floor value is generally subtracted from the original signal (including the induction signal and the noise floor). However, due to its own structure and other characteristics, the current laser sensor will cause the noise floor to change with the temperature, that is, the noise f...

AI Technical Summary

Problems solved by technology

However, due to its own structure and other characteristics, the current laser sensor will cause the noise floor to change with the temperature, that is, the noise floor in the original signal will change with the temperature. However, the estimated noise floor value subtracted during the calculation process is Fixed value, resulting in different degrees of background noise removal at different temperatures, resulting in inaccurate sensing signals after removing background noise, which may easily lead to large errors in sensing results

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