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Pt temperature sensor nonlinear compensation method and circuit

A temperature sensor and non-linear compensation technology, which is used in navigation, industrial control, and aviation fields, can solve the problems of increased area and cost, and achieve the effect of small circuit area

Active Publication Date: 2021-05-07
西安翔腾微电子科技有限公司
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Problems solved by technology

[0003] In order to solve the above-mentioned technical problems in the background technology, the present invention provides a Pt temperature sensor nonlinear compensation method and circuit, which can solve the problem of increased area and cost caused by peripheral circuits in the prior art

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  • Pt temperature sensor nonlinear compensation method and circuit

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Embodiment Construction

[0016] The method for the non-linear compensation of the Pt temperature sensor provided by the invention, the method comprises the following steps:

[0017] 1) Initialize the initial value of each parameter in the circuit; specify the temperature range of the Pt temperature sensor, and determine the nonlinearity Bv; select the external precision resistor Rz, and calculate the linearization compensation coefficient Glin; determine the output range after compensation, that is, determine the minimum output Vmin and the maximum Output Vmax; calculate the amplification factor A of the programmable amplifier, and finally calculate the Pt temperature sensor current excitation size I1 and I2; where the precision resistor Rz is a precision resistor close to the lowest resistance of Pt;

[0018] 2) Put the sensor system in the temperature box, the lowest temperature measurement output V1 in the temperature range of the Pt temperature sensor, and the highest temperature measurement output...

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Abstract

The invention relates to a Pt temperature sensor nonlinear compensation method and circuit. The method comprises the following steps of: 1) initializing initial values of parameters in a circuit; 2) placing a sensor system in a temperature box, and measuring the lowest temperature output V1 and the highest temperature output V2 in the temperature range of a Pt temperature sensor; 3) according to the measured lowest temperature output V1 and the measured highest temperature output V2, recalculating the linearization compensation coefficient Glin and the current excitation magnitudes I1 and I2 of the Pt temperature sensor; and 4) measuring an output V3 at the highest temperature, and calculating a linearization compensation coefficient Glin and current excitation sizes I1 and I2 of the Pt temperature sensor. The circuit of the invention has the advantages of small circuit area, low cost and high precision of output temperature.

Description

technical field [0001] The invention relates to the fields of aviation, navigation, industrial control and the like, in particular to a nonlinear compensation method and circuit of a Pt temperature sensor. Background technique [0002] Pt temperature sensors are widely used in industrial control and other fields. Due to the nonlinearity of the Pt temperature sensor itself, it is easy to cause deviations in perceived temperature. The traditional non-linear compensation method and circuit of Pt temperature sensor is to form a compensation circuit by adding peripheral discrete devices, which increases the circuit cost and board area. At the same time, each discrete device is in a different temperature gradient, which will affect the accuracy of the output temperature. . Contents of the invention [0003] In order to solve the above-mentioned technical problems in the background technology, the present invention provides a Pt temperature sensor nonlinear compensation method a...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K7/21H03F3/45
CPCG01K7/21H03F3/45
Inventor 余立宁田泽刘敏侠邵刚权炜胡曙凡
Owner 西安翔腾微电子科技有限公司
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