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Semiconductor gas sensor and temperature compensation method

A gas sensor, sensor technology, applied in the direction of material resistance, etc., to achieve the effect of stable work, easy promotion and high precision

Inactive Publication Date: 2011-02-16
郑州炜盛电子科技有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] It is not difficult to see that the existing technology only compensates the signal of the semiconductor gas sensor affected by temperature, that is, it can only compensate the sensitivity drift caused by the change of ambient temperature, and cannot compensate the response recovery time, detection limit, Compensation for gas selectivity changes, linearity and other performance effects

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Embodiment Construction

[0010] The technical solutions of the present invention will be described in further detail below through specific embodiments.

[0011] Such as figure 1 As shown, a semiconductor gas sensor includes a sensor housing 1, a gas-sensitive material 2 disposed in the sensor housing 1, a heating resistor 3, an adjustable voltage output circuit 5, a microprocessor circuit 4 and an ambient temperature acquisition sensor 6 ;

[0012] The heating resistor 3 is arranged in the sensor housing 1, the voltage output terminal of the adjustable voltage output circuit 5 is connected to both ends of the heating resistor 3, and the output terminal of the ambient temperature acquisition sensor 6 is connected to the micro The signal acquisition end of the processor circuit 4 and the control output end of the microprocessor circuit 4 are connected to the voltage output value control end of the adjustable voltage output circuit 5 .

[0013] A temperature compensation method for a semiconductor gas...

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Abstract

The invention provides a semiconductor gas sensor and a temperature compensation method. The sensor comprises a sensor shell, an air-sensitive material arranged in the sensor shell, a heating resistor, an adjustable voltage output circuit, a microprocessor circuit and an ambient temperature acquisition sensor, wherein the heating resistor is arranged in the sensor shell, the voltage output ends of the adjustable voltage output circuit is connected with the two ends of the heating resistor, an output end of the ambient temperature acquisition sensor is connected with a signal acquisition end of the microprocessor circuit, and a control output end of the microprocessor circuit is connected with a voltage output value control end of the adjustable voltage output circuit. The method is characterized in that a heater for changing the temperature of the air-sensitive material of the sensor is arranged in the sensor and used for automatically adjusting heating power according to ambient temperature. The sensor has the advantages of high sensitivity and precision and is convenient to use, and the method is simple, practical, flexible and convenient and is easy to popularize.

Description

technical field [0001] The invention relates to a sensor and a temperature compensation method thereof, in particular to a semiconductor gas sensor and a temperature compensation method thereof. Background technique [0002] At present, there are two kinds of semiconductor gas sensor temperature compensation technologies: one is pure hardware circuit compensation, which directly connects the thermistor with the opposite characteristics of the gas sensor in parallel with the sensor load resistance, or connects the thermistor to the signal at the rear end of the sensor. In the processing circuit; the other is the compensation of the combination of software and hardware, which collects the signal of the semiconductor gas sensor and the ambient temperature signal through the single-chip microcomputer, and then obtains the compensation amount at the current temperature through table lookup and calculation for compensation. [0003] It is not difficult to see that the existing tec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/14
Inventor 张小水祁明锋刘建钢钟克创高胜国
Owner 郑州炜盛电子科技有限公司
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