阅读说明：本技术 一种气体探测器的标定方法 (Calibration method of gas detector ) 是由 陈凌珂 张金鑫 陈李 于 2021-08-18 设计创作，主要内容包括：本发明涉及一种气体探测器的标定方法,步骤1,标定罩扣合在气体探测器的反应窗上方,标定罩与气体探测器之间留有空隙,气体探测器的反应窗与标定罩之间形成空腔,标定罩与气体探测器内的电路板上的磁吸装置发生磁化效应,通过内置的标定算法使气体探测器进入标定状态；步骤2,标准浓度的被测气体持续输送到空腔内；步骤3,待被测气体在空腔内稳定后,对气体探测器进行标定。整个过程都是自动完成,只需要人工将标定罩扣合在气体传感器反应窗上,就能够连续不断的对同一型号的气体探测器进行标定。(The invention relates to a calibration method of a gas detector, step 1, a calibration cover is buckled above a reaction window of the gas detector, a gap is left between the calibration cover and the gas detector, a cavity is formed between the reaction window of the gas detector and the calibration cover, the calibration cover and a magnetic attraction device on a circuit board in the gas detector generate a magnetization effect, and the gas detector enters a calibration state through a built-in calibration algorithm; step 2, continuously conveying the measured gas with standard concentration into the cavity; and 3, calibrating the gas detector after the gas to be detected is stable in the cavity. The whole process is automatically completed, and the gas detector of the same model can be continuously calibrated only by manually buckling the calibration cover on the gas sensor reaction window.)

1. A calibration method of a gas detector is characterized in that,

step 1, buckling a calibration cover above a reaction window of a gas detector, leaving a gap between the calibration cover and the gas detector, forming a cavity between the reaction window of the gas detector and the calibration cover, generating a magnetization effect between the calibration cover and a magnetic attraction device on a circuit board in the gas detector, and enabling the gas detector to enter a calibration state through a built-in calibration algorithm;

step 2, continuously conveying the measured gas with standard concentration into the cavity;

and 3, after the gas to be detected is stable in the cavity, automatically completing calibration by the gas detector.

2. A calibration method for a gas detector according to claim 1, characterized in that: the environment temperature outside the cavity is 20-30 ℃ and the humidity is 40-70% RH in the calibration process.

3. A calibration method for a gas detector according to claim 1, characterized in that: all fixedly connected with gas sensor in the reaction window, gas sensor's gaseous reaction value when unchangeable within two seconds, can set position gaseous stable flag bit once, if stable flag bit adds up more than five times, measured gas is stable in the cavity in step 3 promptly, and then gas detector marks automatically.

4. A calibration method for a gas detector according to claim 3, characterized in that: the number of the reaction windows is multiple, a plurality of gas sensors are fixedly connected in the reaction windows respectively, the gas sensors belong to different types, and different gas sensors can react with different detected gases to generate gas reaction signal values.

5. A calibration method for a gas detector according to claim 3, characterized in that: an air inlet is formed in the calibration cover and used for introducing air into the cavity.

6. A calibration method for a gas detector according to claim 3, characterized in that: the calibration cover is fixedly connected with a fixing column, the fixing column is fixedly connected with a first magnetic sheet, the first magnetic sheet is located in the inner cavity, a second magnetic sheet is fixedly connected inside the gas detector, and the first magnetic sheet and the second magnetic sheet can be adsorbed.

7. A calibration method for a gas detector according to claim 3, characterized in that: the fixing plate is provided with a fixing hole, and the fixing hole is used for being fixed with the gas detector.

8. A calibration method for a gas detector according to claim 3, characterized in that: the flowmeter is positioned between the gas collecting bottle and the calibration hood.

9. A calibration method for a gas detector according to claim 8, characterized in that: a pressure valve is communicated between the flowmeter and the gas collecting bottle, and the pressure valve can control whether the inner cavity is communicated with the gas collecting bottle or not.

10. A calibration method for a gas detector according to claim 1, characterized in that: the calibration cover comprises a cover plate and two fixing plates, the edge of the cover plate protrudes upwards to form a convex edge, the two fixing plates are fixedly connected with the two side edges of the cover plate, the calibration cover is buckled on the gas reaction window, the upper end of the convex edge is attached to the gas detector, and a cavity is formed between the calibration cover and the gas detector.

Technical Field

The invention relates to the field of gas detectors, in particular to a calibration method of a gas detector.

Background

In the calibration process of the prior gas detector, the gas detector is fixed in a closed container with a known volume, and the gas to be detected with a certain concentration is introduced, so that the calibration of the gas detector is completed. The method has the problems that the distribution of the measured gas in the container is uneven, so that the distribution error is large, and the testing efficiency is low due to the fact that the measured gas needs to enter a calibration state manually during calibration.

Disclosure of Invention

The invention aims to provide a calibration method of a gas detector, which aims to solve the problems that the calibration state needs to be manually entered during calibration, and the calibration efficiency is low.

In order to achieve the purpose, the invention adopts the following technical scheme:

a calibration method of a gas detector is characterized in that,

step 1, buckling a calibration cover above a reaction window of a gas detector, leaving a gap between the calibration cover and the gas detector, forming a cavity between the reaction window of the gas detector and the calibration cover, generating a magnetization effect between the calibration cover and a magnetic attraction device on a circuit board in the gas detector, and enabling the gas detector to enter a calibration state through a built-in calibration algorithm;

step 2, continuously conveying the measured gas with standard concentration into the cavity;

and 3, after the gas to be detected is stable in the cavity, automatically completing calibration by the gas detector.

Further, the environment temperature outside the cavity is 20-30 ℃ and the humidity is 40-70% RH in the calibration process.

Further, all fixedly connected with gas sensor in the reaction window, when the gas response value of gas sensor does not change within two seconds, can set the gaseous stable flag bit once, if stable flag bit accumulation exceedes five times, measured gas is stable in the cavity in step 3 promptly, and then gas detector marks automatically.

Furthermore, the number of the reaction windows is multiple, a plurality of gas sensors are fixedly connected in the reaction windows respectively, the gas sensors belong to different types, and different gas sensors can react with different detected gases to generate gas reaction signal values.

Furthermore, an air inlet is formed in the calibration cover and used for introducing air into the cavity.

Furthermore, the calibration cover is fixedly connected with a fixing column, the fixing column is fixedly connected with a first magnetic sheet, the first magnetic sheet is located in the inner cavity, a second magnetic sheet is fixedly connected inside the gas detector, and the first magnetic sheet and the second magnetic sheet can be adsorbed.

Furthermore, a fixing hole is formed in the fixing plate and used for fixing the gas detector.

Further, the flowmeter is positioned between the gas collecting bottle and the calibration hood.

Furthermore, a pressure valve is communicated between the flowmeter and the gas collecting bottle, and the pressure valve can control whether the inner cavity is communicated with the gas collecting bottle or not.

Furthermore, the calibration cover comprises a cover plate and two fixing plates, the edge of the cover plate protrudes upwards to form a convex edge, the two fixing plates are fixedly connected with the two side edges of the cover plate, the calibration cover is buckled on the gas reaction window, the upper end of the convex edge is attached to the gas detector, and a cavity is formed between the calibration cover and the gas detector.

The invention has the beneficial effects that:

after the calibration cover is buckled on the gas detector reaction window, a gap is formed between the calibration cover and the gas detector, the gas detector enters a calibration state through a magnetization reaction between the calibration cover and the gas detector, the gas collecting bottle continuously introduces the measured gas with standard concentration into the cavity, the measured gas can overflow out of the cavity from the air between the calibration cover and the gas detector when the measured gas is introduced, and the gas detector is calibrated after the measured gas is stabilized in the cavity. The whole process is automatically completed, the calibration cover is buckled on the gas detector reaction window only by manpower, the detectors of the same model can be continuously calibrated, and the calibration efficiency is high.

Drawings

FIG. 1 is a schematic view of the gas detector and calibration shield in an overall calibration method for the gas detector;

fig. 2 is a schematic structural diagram of a calibration cover in a calibration method of a gas detector.

Names corresponding to the marks in the figure:

1-a gas detector; 11-a through hole; 2-calibrating the cover; 21-cover plate; 22-a fixing plate; 23-an air intake; 24-a first magnetic sheet; 25-convex edge.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

The embodiment of the invention comprises the following steps:

referring to the attached drawings 1-2, the components used for the calibration method of the gas detector for facilitating understanding include a calibration cover 2 and the gas detector 1, wherein the calibration cover 2 is buckled on a reaction window of the gas detector 1, and a cavity is formed between the calibration cover 2 and the reaction window of the gas detector.

The calibration cover 2 comprises a cover plate 21 and two fixing plates 22, the edge of the cover plate 21 protrudes upwards to form a convex edge 25, an air inlet 23 is formed in the cover plate 21, the air inlet 23 is used for introducing air into the cavity, the two fixing plates 22 are fixedly connected with the two side edges of the cover plate 21, the calibration cover 2 is buckled on the gas detector 1, the upper end of the convex edge 25 is attached to the gas detector 1, and a cavity is formed between the calibration cover 2 and the gas detector 1. The calibration of the gas detector 1 is achieved by adding gas to the cavity.

Fixedly connected with fixed column on the apron 21, the first magnetic sheet 24 of fixedly connected with on the fixed column, first magnetic sheet 24 are located the inner chamber, and through-hole 11 has been seted up to gas detector 1 outside, and the inside fixedly connected with second magnetic sheet of through-hole 11 of gas detector 1, first magnetic sheet 24 and second magnetic sheet can adsorb. The fixing plate 22 is provided with a fixing hole for fixing with the gas detector 1, and the calibration cover 2 and the gas detector 1 are not completely sealed. The flowmeter is located between the gas collecting bottle and the inner cavity and used for monitoring the flow of the gas to be detected, the pressure valve is communicated between the flowmeter and the gas collecting bottle, and the pressure reducing valve is used for adjusting the flow speed of the gas to be detected.

A calibration method of a gas detector comprises the following steps that 1, a calibration cover 2 is buckled on a reaction window of the gas detector 1, a cavity is formed between the reaction window of the gas detector 1 and the calibration cover 2, the calibration cover 2 and a magnetic attraction device on a circuit board in the gas detector 1 generate a magnetization effect, and the gas detector 1 enters a calibration state through a built-in calibration algorithm; step 2, continuously conveying the measured gas with standard concentration into the cavity; step 3, fixedly connecting four gas sensors in the cavity, wherein the four gas sensors are respectively positioned in four reaction windows, and can acquire gas reaction signal values in real time and judge whether the ventilated state is stable or not according to the magnitude and the change rate of the gas reaction signal values; if the gas reaction signal within two seconds does not change, the gas stability flag bit is set once, if the accumulation of the stability flag bit exceeds five times, the gas reaction is considered to be stable, calibration is started, the reaction value of the calibration point is recorded, and a successful calibration indication is given.

The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by anyone in the light of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as those of the present application, fall within the protection scope of the present invention.