A method for preventing data mistransmission during online calibration of a gas sensor

Abstract

The present invention relates to a method for preventing data mistransmission during the online calibration process of a gas sensor, and belongs to the field of coal mine informatization. A method for preventing data mistransmission during the online calibration process of a gas sensor, the method comprising the following steps: S1: entering detection mode, recording the detection value A of the gas sensor and the sensor's preset threshold value Y; setting the floating offset of the detection value A to δ; S2: entering adjustment mode, calibrating the gas sensor, inputting a standard quantity into the sensor, and the sensor outputting adjustment data T; S3: waiting for T < A + δ, and lifting the prohibition of entering the detection mode from the adjustment mode; if Y ≥ A, comparing T with Y, and if T ≥ Y + δ, prohibiting entering the detection mode from the adjustment mode. The present invention effectively solves the problems of mistransmission, false alarm, and triggering system malfunction caused by human error or remote control failure during the online calibration process of mining sensors, and effectively improves the reliability and stability of the coal mine safety monitoring system.

Description

Technical Field

[0001] The invention belongs to the field of coal mine informatization and relates to a method for preventing data mistransmission during an online calibration process of a gas sensor. Background Art

[0002] Currently, sensors in coal mine safety monitoring systems are calibrated online and periodically underground. This involves using a calibration gas sample to test and calibrate the sensors while the monitoring system and sensors are operating normally. To prevent remote monitoring software from misinterpreting test values ​​from underground sensor ventilation as indicating that monitoring parameters at the installation site are out of range, the device is typically switched from "Test Mode" to "Calibration Mode" before applying standard gas. After calibration, the "Calibration Mode" is then switched back to "Test Mode."

[0003] Mining sensors are typically operated and configured using remote controls (such as infrared remote controls). During this process, operator error or remote control failure often leads to unexpected exits from "calibration mode," mistaking ventilation test values ​​for normal monitoring values, leading to false alarms and system malfunctions.

[0004] To address this problem, the present invention proposes a method for preventing data mistransmission during the online calibration process of a gas sensor. Summary of the Invention

[0005] In light of this, the present invention aims to provide a method for preventing data mistransmission during the online calibration process of gas sensors. By identifying and judging the sensor's current operating mode and real-time detection values, a programming method and process are designed that does not affect the operating habits of on-site personnel while preventing the sensor from unexpectedly exiting "calibration mode," thereby avoiding data mistransmission and false alarms.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A method for preventing data mistransmission during an online calibration process of a gas sensor, the method comprising the following steps:

[0008] S1: Enter the detection mode and record the detection value A of the gas sensor and the preset threshold value Y of the sensor; considering the floating change of the detection value of the analog sensor, the floating offset of the detection value A is set to δ;

[0009] S2: Enter the calibration mode, calibrate the gas sensor, input the standard quantity into the sensor, and the sensor outputs the calibration data T;

[0010] S3: If A≥Y, T is compared with A. If T≥A+δ, it is forbidden to enter the detection mode from the adjustment mode; wait for T<A+δ, and then the prohibition of entering the detection mode from the adjustment mode is lifted; if Y≥A, T is compared with Y. If T≥Y+δ, it is forbidden to enter the detection mode from the adjustment mode; wait for T<Y+δ, and then the prohibition of entering the detection mode from the adjustment mode is lifted.

[0011] Optionally, the gas sensor is a methane sensor used in mines, which records the detection value A in the "detection mode" and the preset alarm threshold Y=1.50% of the sensor, with a floating offset of δ=0.05%;

[0012] Set the sensor to enter, start calibration, input the standard amount into the sensor, and the sensor outputs the calibration data T=2.00%;

[0013] If A = 1.60%, which is greater than the alarm threshold, T is compared with A. If T = 2.00%, which is greater than 1.60% + 0.05%, the adjustment mode is prohibited and the detection mode is entered. Wait for T to drop below 1.50% + 0.05%, then the prohibition of the adjustment mode is lifted and the detection mode is entered. If A = 0.50%, T is compared with Y. If T ≥ Y, the adjustment mode is prohibited and the detection mode is entered. Wait for T to drop below 0.50%, then the adjustment mode is lifted and the detection mode is entered.

[0014] The beneficial effects of the present invention are that the present invention effectively solves the accidents such as mistransmission, false alarm, and malfunction of the triggering system caused by human misoperation or remote control failure during the online adjustment of mining sensors, and effectively improves the reliability and stability of the coal mine safety monitoring system.

[0015] Other advantages, objects, and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art upon examination of the following description or may be learned from practice of the present invention. The objects and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below with reference to the accompanying drawings, in which:

[0017] Figure 1 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0018] The following describes the embodiments of the present invention by means of specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0019] Among them, the accompanying drawings are only for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting the present invention. In order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the dimensions of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the accompanying drawings.

[0020] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0021] See also Figure 1 , which is a method to prevent data mistransmission during the online calibration process of a gas sensor.

[0022] In "Detection Mode," the sensor's detection value is recorded in real time. If the detection value is less than the alarm threshold, after switching to "Adjustment Mode," the device is prohibited from exiting "Adjustment Mode" if the sensor's detection value in calibration mode exceeds the sensor's preset alarm threshold. If the sensor's detection value in detection mode exceeds the alarm threshold, the calibration value is compared with the detection value in detection mode. If the calibration value is greater than the detection value in detection mode, the device is prohibited from exiting "Adjustment Mode." Otherwise, "Adjustment Mode" can be exited normally.

[0023] Key points of the invention:

[0024] (1) The first step is to record the detection value A in the "detection mode" and the sensor's preset threshold value Y. Considering the floating change of the analog sensor's detection value, the floating offset of the detection value A is set to δ.

[0025] (2) The second step is to set the sensor to enter the "adjustment mode" and start calibration. Input the standard quantity into the sensor, and the sensor will output the "adjustment data" T.

[0026] (3) In the third step, if A≥Y, T is compared with A. If T≥A+δ, the setting of "adjustment mode" to "test mode" is prohibited; wait for T<A+δ, and release the mode switching protection. If Y≥A, T is compared with Y. If T≥Y+δ, the setting of "adjustment mode" to "test mode" is prohibited; wait for T<Y+δ, and release the mode switching protection.

[0027] (1) Taking the mining methane sensor as an example, the detection value A in the "detection mode" is recorded, and the floating offset is δ = 0.05% compared with the sensor's preset alarm threshold Y = 1.50%.

[0028] (2) Set the sensor to enter and start calibration. Input the standard value into the sensor and the sensor will output “calibration data” T=2.00%.

[0029] (3) If A = 1.60%, which is greater than the alarm threshold, T is compared with A. If T = 2.00%, which is greater than 1.60% + 0.05%, the setting of "adjustment mode" to "detection mode" is prohibited; wait for T to drop below 1.50% + 0.05% to release the mode switching protection. If A = 0.50%, T is compared with Y. If T ≥ Y, the setting of "adjustment mode" to "detection mode" is prohibited; wait for T to drop below 0.50% to release the mode switching protection.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for preventing data mistransmission during online calibration of a gas sensor, characterized by: The method comprises the following steps: S1: Enter the detection mode and record the detection value A of the gas sensor and the preset threshold value Y of the sensor; considering the floating change of the detection value of the analog sensor, the floating offset of the detection value A is set to δ; S2: Enter the calibration mode, calibrate the gas sensor, input the standard quantity into the sensor, and the sensor outputs the calibration data T; S3: If A≥Y, T is compared with A. If T≥A+δ, it is forbidden to enter the detection mode from the adjustment mode; wait for T<A+δ, and then the prohibition of entering the detection mode from the adjustment mode is lifted; if Y≥A, T is compared with Y. If T≥Y+δ, it is forbidden to enter the detection mode from the adjustment mode; wait for T<Y+δ, and then the prohibition of entering the detection mode from the adjustment mode is lifted.

2. The method for preventing data mistransmission during online calibration of a gas sensor according to claim 1, characterized in that: The gas sensor is a mining methane sensor, which records the detection value A in the "detection mode" and the sensor's preset alarm threshold Y = 1.50%, with a floating offset of δ = 0.05%; Set the sensor to "calibration mode" and start calibration. Input the standard value into the sensor and the sensor will output the calibration data T = 2.00%. If A = 1.60%, which is greater than the alarm threshold, T is compared with A. If T = 2.00%, which is greater than 1.60% + 0.05%, the calibration mode is disabled and the detection mode is entered. Wait for T to drop below 1.60% + 0.05%, then cancel the prohibition of adjustment mode and enter the detection mode; if A = 0.50%, compare T with Y, if T ≥ Y, prohibit the adjustment mode and enter the detection mode; Wait for T to drop below 1.50% + 0.05%, then exit the adjustment mode and enter the detection mode.

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