A detection method and system based on a gas detection device

A technology of gas detection and detection method, which is applied to the application of measuring devices, measuring heat, and thermometers, etc., can solve the problems of gas sensor reading offset and affect the accuracy of results, and achieve the effect of ensuring accuracy

Active Publication Date: 2021-11-16
新考思莫施电子(上海)有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The built-in controller in the existing gas detector reads the data of the gas sensor, and then simply displays the data or prompts the result after a simple judgment: alarm or not; with the change of ambient concentration or the change of ambient temperature , the readings of the gas sensor will be offset, which will affect the accuracy of a simple judgment result

Method used

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  • A detection method and system based on a gas detection device

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Embodiment 1

[0052] A detection method based on a gas detection device, such as figure 1 As shown, it is based on a gas detection device with a detection unit and an alarm unit. The detection part is provided with a controller and a gas sensor and a temperature sensor which are both data-connected to the controller. The controller can use a single-chip microcomputer, the single-chip microcomputer can be STM32 series or Freescale K60 series, the single-chip microcomputer is equipped with a timer, comparator, AD conversion and PWM output, the timer is used to provide timing signals, and the AD conversion is used to convert the external analog of the single-chip microcomputer The signal is converted into a digital signal, and the PWM output is convenient to control the brightness of the external LED of the microcontroller. A PWM output pin signal of the controller is connected with a fault alarm light made of LED, and the single-chip microcomputer can control the brightness of the fault alar...

Embodiment 2

[0072] A detection system based on a gas detection device, the difference from Embodiment 1 is that, based on a gas detection device with a detection unit and an alarm unit, the detection unit is equipped with a controller and a gas sensor and a temperature sensor that are both data-connected to the controller. The sensor, the alarm part is equipped with a sound module and an optical module, the alarm part receives the alarm signal from the controller and sends out an audible and visual signal, and the controller signal is connected with a fault alarm light.

[0073] The controller includes the following modules:

[0074] The initialization module is used to initialize the gas concentration value stored in the controller, the concentration error array, the gas temperature value, the temperature error array, the concentration alarm value, the temperature alarm value and the temperature difference value, and initialize the alarm part.

[0075] The reading conversion module is co...

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PUM

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Abstract

The invention relates to an environmental detection sensor, and discloses a detection method based on a gas detection device and a system thereof. The gas detection device has a detection part and an alarm part, the detection part has a controller, a gas sensor and a temperature sensor, and the controller has a fault alarm light ;Methods include S1: the controller has gas concentration value, concentration alarm value and temperature difference; S2: read the gas concentration data and gas temperature data, S3: take the absolute value of the difference between the gas concentration value and the gas concentration data as the absolute concentration Value, S4: When the absolute value of the difference between the current gas temperature data and the last gas temperature data is greater than the temperature difference, the controller controls the fault alarm light to light; S5: The absolute value of the concentration is greater than the concentration alarm value, the controller controls the alarm part to alarm, Return to S2; judge whether there is a collection failure or a drastic temperature change according to the temperature change. If the offset of the collected data changes greatly due to the above situation, the controller will issue a fault prompt to ensure the accuracy of the data.

Description

technical field [0001] The invention relates to the technical field of environmental detection sensors, more specifically, it relates to a detection method based on a gas detection device and a system thereof. Background technique [0002] As the country and society pay more and more attention to environmental protection, the detection of environmental parameters is becoming more and more important, because environmental detection is the first step in environmental protection. Gas detectors are often used in environmental testing. [0003] A gas detector is an instrument for gas concentration detection. It mainly refers to a portable / handheld gas detector. It mainly uses gas sensors to detect the types of gases existing in the environment. Gas sensors are sensors used to detect the composition and content of gases. , Gas sensors are classified by detection objects, and sensors used to detect gas composition and concentration are called gas sensors, regardless of whether it ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/00G01K13/00G01K13/024
CPCG01N33/0067G01N33/0063G01K13/00
Inventor 李元俊鲁波略姚敏
Owner 新考思莫施电子(上海)有限公司
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