Laser sensor, noise floor compensation method and electronic equipment

Abstract

The present disclosure relates to a laser sensor, including: a receiving array, which converts the received optical signal into an electrical signal, wherein, when the ambient temperature is within a first preset range, the noise floor of the electrical signal is positively correlated with the temperature. When the ambient temperature is within the second preset range, the noise floor of the electrical signal is negatively correlated with the temperature; the compensation module receives the electrical signal, and when the ambient temperature is within the first preset range, amplifies the electrical signal with the first amplification factor, and in When the ambient temperature is within the second preset range, the electrical signal is amplified with the second amplification factor; wherein, the first amplification factor is negatively correlated with the temperature, and the second amplification factor is positively correlated with the temperature; The signal and the preset noise floor determine the sensing signal. According to the embodiments of the present disclosure, the noise floor after compensation changes less with temperature, which is beneficial to obtain accurate sensing results.

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...

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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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