Digital temperature sensor

Abstract

The invention discloses a digital temperature sensor, which comprises a signal conversion module and a plurality of temperature sensing branches, wherein the temperature sensing branches are used forsensing the environment temperature, outputting a first digital signal when detecting that the environment temperature is lower than the temperature threshold, and outputting a second digital signal when detecting that the environment temperature is higher than the temperature threshold; the plurality of temperature sensing branches are sequentially connected with the signal conversion module through signals; the temperature threshold value of the plurality of temperature sensing branches is sequentially increased; the signal conversion module is used for sequentially receiving first digital signals or second digital signals output by the branches to obtain the current digital codes, and generating the temperature indicating signals corresponding to the current digital codes according to the logical relationship, wherein the logical relationship corresponding table records the temperature indicating signals corresponding to different digital codes. The analog-to-digital conversion of the temperature sensing can be realized at ultralow power consumption.

Description

technical field [0001] The invention relates to the technical field of temperature sensing, in particular to a digital temperature sensor. Background technique [0002] A temperature sensor mainly refers to a sensor that can sense temperature and convert it into a usable output signal. It is widely used in some engineering and scene applications. According to the characteristics of sensor materials and electronic components, different types, the implementation of temperature sensors mainly include sensors designed based on the principle of metal expansion, resistance sensors, bimetallic sheet sensors, bimetallic rod and metal tube sensors, thermocouple sensors, and new Distributed fiber optic temperature sensor. [0003] The traditional temperature sensor is only used as a single detection of the analog quantity of temperature, and the output is generally an analog signal of current or voltage. The signal processing process can be connected to the current digital signal pr...

AI Technical Summary

Problems solved by technology

[0003] The traditional temperature sensor is only used as a single detection of the analog quantity of temperature, and the output is generally an analog signal of current or voltage. The signal processing process can be connected to the current digital signal processing systems such as the Internet, the Internet of Things, and artificial intelligence equipment. This analog signal processing process will not only increase the number of components, but also cause the power supply conditions of the temperature sensor to be restricted.

At the same time, due to the non-linear characteristics of the temperature sensitivity of sensor materials and electronic components, it generally needs to go through various conversion processes inside the device, which undoubtedly increases more processing components and increases power consumption in disguise.

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