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Temperature detection circuit

A technology of temperature detection circuit and temperature sensor, applied in thermometers, measuring devices, measuring heat, etc., can solve problems such as complex circuit structure, undetectable, small temperature changes, etc.

Inactive Publication Date: 2019-02-19
广州市优仪科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the detection sensitivity of the temperature detection circuit in the prior art is low, it cannot detect small temperature changes, and the circuit structure is complex and the cost is high

Method used

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Embodiment Construction

[0035] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0036] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation indicated by rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating ...

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Abstract

The invention provides a temperature detection circuit, which comprises at least two temperature sensor input units; gating modules, which are respectively connected to the at least two temperature sensor input units to respectively output the detection voltage signal of one of the at least two temperature sensor input units; a signal amplifier module for amplifying the detection voltage signal output by the gating module to obtain an amplified signal; an integral module for acquiring the amplified signal output by the signal amplifier module and performing an integral operation on the amplified signal; a voltage comparison module, which compares the integrated voltage output after the integration operation of the integral module with a preset voltage, and outputs a level signal accordingto the comparison result; a detection module for detecting the actual voltage information of a power supply module; and a central processing module for calculating the temperature value detected by the corresponding temperature sensor according to the level signal output by the voltage comparison module.

Description

technical field [0001] The invention relates to the field of temperature detection, in particular to a temperature detection circuit. Background technique [0002] In the prior art, the temperature detection mostly adopts the thermistor to sense the temperature change, and realizes the temperature detection by sensing the voltage change on the thermistor. [0003] However, the detection sensitivity of the temperature detection circuit in the prior art is low, it cannot detect small temperature changes, and the circuit structure is complicated and the cost is high. [0004] Therefore, there are defects in the prior art, and improvement is badly needed. Contents of the invention [0005] The object of the present invention is to provide a temperature detection circuit, which has the beneficial effects of improving detection accuracy and reducing cost. [0006] An embodiment of the present invention provides a temperature detection circuit, including: [0007] At least two...

Claims

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Application Information

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IPC IPC(8): G01K7/22
CPCG01K7/22
Inventor 叶南洋
Owner 广州市优仪科技股份有限公司
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