Automatic calibration system for gas sensor

An automatic calibration system, gas sensor technology, applied in the direction of instruments, scientific instruments, measuring devices, etc., can solve the problems of complex working procedures, increased production costs, low production efficiency, etc., to improve production efficiency, save costs, and improve utilization. Effect

Inactive Publication Date: 2011-07-20
HENAN HANWEI ELECTRONICS
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Problems solved by technology

In the prior art, the calibration of the gas sensor requires procedures such as dynamic gas distribution, incubator experiments, collection of raw data, and sorting of raw data. These procedures require manual operations, the work procedures are complicated, tedious and repetitive, and the production efficiency is low. , the pass rate is low, and the labor cost of the product is high. In addition, the direct use of standard gas also increases the production cost

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  • Automatic calibration system for gas sensor
  • Automatic calibration system for gas sensor

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specific Embodiment approach

[0012] Such as figure 1 As shown, a gas sensor automatic calibration system, which includes N groups of steel cylinders 7, N groups of solenoid valves 8, solenoid valve control circuits, N groups of gas mass flow controllers 9, DC power supply 6, high and low temperature alternating test box 3, A sensor gas cover 4, a sensor data acquisition circuit 10, an industrial control computer 1, and a liquid crystal display 2 connected to the industrial control computer 1 are arranged in the high and low temperature alternating experiment box 3;

[0013] Wherein, the outlet of the steel cylinder 7 is equipped with a pressure reducing valve, the outlets of N groups of steel cylinders 7 are respectively connected to the inlets of N groups of solenoid valves 8, and the outlets of N groups of solenoid valves 8 are respectively connected to the inlets of N groups of gas mass flow controllers 9, The outlets of N groups of gas mass flow controllers 9 are connected to the inlets of the sensor ...

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Abstract

The invention provides an automatic calibration system for a gas sensor. The automatic calibration system comprises a steel cylinder, a gas mass flow controller, a high- and low-temperature alternate experimental box, a sensor gas hood, a sensor data acquisition circuit and an industrial computer, wherein the steel cylinder, the gas mass flow controller and the sensor gas hood constitute an air distribution system; the industrial computer is connected with the high- and low-temperature alternate experimental box to produce different constant temperatures; the industrial computer is connected with the gas mass flow controller to generate set gas concentrations at different constant temperatures; and the industrial computer is connected with the sensor data acquisition circuit to acquire gas concentration response values of the gas sensor at different constant temperatures and transmit sensor calibration data to the gas sensor. The automatic calibration system has the advantages of scientific design, convenience for using, complete functions, automatic temperature control capability, automatic dynamic air distribution capability, automatic data acquisition capability, automatic data handling capability, high working efficiency and high reliability.

Description

technical field [0001] The invention relates to a calibration device for a gas sensor, in particular to an automatic calibration system for a gas sensor. Background technique [0002] The gas sensor output is related to the two degrees of freedom of gas concentration and ambient temperature. Gas concentration is the measured physical quantity, and ambient temperature is the interference physical quantity. In order to ensure the performance of each gas sensor, one-to-one high and low temperature experiments must be performed on the sensor product. Obtain the calibration data of sensor products; the essence of gas sensor calibration is the mapping relationship between the original analog signal of the sensor and the gas concentration in a given range at different temperatures. In the prior art, the calibration of the gas sensor requires procedures such as dynamic gas distribution, incubator experiments, collection of raw data, and sorting of raw data. These procedures require ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/00
Inventor 尚中锋秦伟山祁泽刚张青云张永怀王书潜司志高
Owner HENAN HANWEI ELECTRONICS
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