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High-precision temperature detecting circuit

A temperature detection circuit, high-precision technology, applied in thermometers, thermometers with directly heat-sensitive electric/magnetic elements, measuring devices, etc., can solve the problems of complex circuits, poor compensation accuracy, high power consumption, etc., and achieve simplified circuits structure, reduce power consumption, and enhance the effect of universal practicability

Inactive Publication Date: 2018-06-22
重庆澳净环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing measurement circuits, some simple circuits can only compensate a certain measurement point within the full range, while the compensation accuracy of other measurement points is poor
Moreover, most of the circuits that can perform high-precision compensation in the full range are complex and consume high power.

Method used

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Embodiment Construction

[0020] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0021] Such as figure 1 As shown, the high-precision temperature detection circuit of the present invention includes a temperature measuring resistor RT, a three-terminal voltage regulator, a resistor R1, a resistor R2, a resistor R3, an electrically adjustable resistor R4, a resistor R5, a resistor R6, a resistor R7, and a resistor R8 and amplifier U1.

[0022] Among them, one end of the three-terminal voltage regulator is connected to VCC, the other end is connected to one end of resistor R1 and resistor R2, the other end of resistor R1 is connected to temperature measuring resistor RT and one end of resistor R6, and the other end of resistor R2 is connected to resistor R3 and one end of the adjustable resistor R4, the other end of the resistor R3 is connected to the inverting end of the amplifier U1, the other end of the resistor R6 is ...

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PUM

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Abstract

The invention relates to a high-precision temperature detecting circuit. The high-precision temperature detecting circuit comprises a temperature measuring resistor RT, a three-terminal voltage regulator, a resistor R1, a resistor R2, a resistor R3, an adjustable resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8 and an amplifier U1; the three-terminal voltage regulator is connected to the resistor R1 and the resistor R2; the resistor R1 is connected to the temperature measuring resistor RT and the resistor R6; the resistor R2 is connected to the resistor R3 and the adjustable resistor R4; the resistor R3 is connected to an inverting end of the amplifier U1; the other end of the resistor R6 is connected to a non-inverting end of the amplifier U1; the other end of the adjustable resistor R4 is connected to one end of the resistor R5, and the other end of the resistor R5 is grounded; the non-inverting end of the amplifier U1 is grounded via the resistor R7; and the resistor R8 is connected between the inverting end of the amplifier and an output end of the amplifier. Compared with the conventional temperature detection, the circuit structure and the temperature measuring resistor of the invention have high detection precision, and are suitable for temperature detection in a temperature range of -50 DEG C to + 150 DEG C, and the invention has strong universalutility.

Description

technical field [0001] The invention belongs to the technical field of temperature detection and relates to a high-precision temperature detection circuit. Background technique [0002] The temperature measurement circuit is mainly composed of sensors, measurement circuits and connecting wires. In order to eliminate the influence of the resistance value of the connecting wire on the measured value, it must be compensated in the measurement circuit. In existing measurement circuits, some simple circuits can only compensate a certain measurement point within the full range, while the compensation accuracy of other measurement points is relatively poor. Moreover, most circuits that can perform high-precision compensation in the full range are relatively complex and consume high power consumption. Contents of the invention [0003] In view of this, the object of the present invention is to provide a high-precision temperature detection circuit, thereby improving the temperat...

Claims

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Application Information

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IPC IPC(8): G01K7/16
CPCG01K7/16
Inventor 何德树何星锦何思颖
Owner 重庆澳净环保科技有限公司
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