Method and device for optimizing power-on time of sensor and calibrating calculated concentration

Abstract

The invention discloses a method and device for optimizing the power-on time of a sensor and calibrating the calculated concentration, and the method comprises the steps: starting the power-on preheating of the sensor, obtaining a real-time signal value output every set time in the preheating process, circularly calculating the signal value difference between the real-time signal value and the previous signal value, and judging whether the signal value is stable or not according to the signal value difference. After the system is stabilized, preheating of the sensor is finished, the system continues to be aged but is not complete, the system executes a virtual zeroing and calibration mechanism and a read-back mechanism, the sensor can display a normal zeroing and calibration program state, but at the moment, zeroing and AD0 calibration values cannot be adopted to calculate a sensitivity value k and a concentration value V; at the moment, the AD0 adopts an AD0 dynamic value determined through the data condition of a real-time signal value ADi obtained in a read-back mechanism. According to the invention, the preheating time is shortened from several hours to dozens of minutes, and measurement errors caused by zeroing and calibration operations when the sensor is not completely aged are avoided through a virtual zeroing and calibration mechanism.

Description

Technical Field

[0001] The present invention relates to aging, zeroing, calibration and concentration calculation technologies for electrochemical bias sensors, and in particular to a method for optimizing warm-up time by real-time monitoring of sensor output signal changes and ensuring the accuracy of measurement results through a virtual zeroing and calibration mechanism. Background Art

[0002] Working Principle of Electrochemical Bias Sensors: Electrochemical bias sensors determine the concentration of a substance by detecting the change in current or potential generated by an electrochemical reaction at an electrode. They are widely used in environmental monitoring, industrial process control, and medical diagnostics, playing a key role in accurately measuring the concentration of various gases.

[0003] Electrochemical bias sensors are suitable for measuring gases such as hydrogen chloride, nitric oxide, ethylene oxide, propylene oxide, methanol, ethanol, hydrogen peroxide, and vinyl chloride in application scenarios such as environmental monitoring and industrial gas detection. At present, when electrochemical bias sensors are powered on for the first time, they need to undergo a long period of power-on aging before they can reach a stable state. The aging time is extremely uncertain and may take up to about 72 hours. Moreover, even if the power is turned on again after a short power outage, it will take at least two hours of aging time. This feature brings great inconvenience to on-site use. Each time the power is turned on again after a power outage, it takes at least two hours to wait. After two hours of aging, due to the deviation in the gas concentration calculation, the sensor may still not reach the ideal stable state, resulting in deviations in the readback data, which seriously affects the accuracy and timeliness of the measurement. Summary of the Invention

[0004] The technical problem to be solved by the present invention is a method and device for optimizing the power-on time of the sensor and calibrating the calculated concentration. By real-time monitoring of the change in the sensor output signal, preheating can be stopped when the sensor sensitivity tends to be stable. Since a virtual zeroing and calibration mechanism is adopted during the aging process, errors in gas concentration calculation caused by zeroing and calibration when the sensor is not fully aged are avoided.

[0005] In order to solve the above technical problems, the present invention provides a method for optimizing sensor power-on time and calibrating calculated concentration, which comprises the following steps:

[0006] The sensor starts to power on and preheat, and obtains the real-time signal value AD output every set time during the preheating process i , calculate and the previous signal value AD i-1 The signal value difference AD i -AD i-1 , i is the ordinal number;

[0007] The system is judged to be stable based on the difference of the signal value. If the system is stable, the preheating is ended and the sensitivity measurement tends to be stable.

[0008] Get the sensitivity k value and concentration V value of the sensor. The calculation formula is as follows:

[0009]

[0010] Where: C 标定 is the known concentration value of the calibration gas; AD 标定 The output signal value of the sensor in the calibration gas environment; the signal value AD0 is the calibration value or dynamic value. The calibration value is the zero-point output signal value when the sensor is zeroed without gas;

[0011] When the sensor is warmed up and aging is not complete, the system performs virtual zeroing and calibration as well as readback.

[0012] The virtual zeroing and calibration mechanism and the readback mechanism include: although the sensor will display the normal zeroing and calibration program status, the zeroing and AD0 calibration values ​​at this time will not be used to calculate the sensitivity k value and concentration V value; at this time AD0 uses the real-time signal value AD obtained by the readback mechanism. i AD0 dynamic value determined by data conditions;

[0013] The sensor is fully charged and has completely aged, and is now in normal working condition.

[0014] Furthermore, the real-time signal value AD is obtained in the readback mechanism. i The steps to determine the dynamic value of AD0 according to the data situation are as follows:

[0015] First, obtain the real-time signal value AD within a set time period. i And the signal value difference AD i -AD i-1 , if AD i Shows a non-continuous upward or downward trend and signal value difference AD i -AD i-1 <10, the zero point does not change, and the current AD0 dynamic value remains unchanged. i If the system shows a continuous upward trend, it is judged that the system is in the ventilation state, and the AD0 dynamic value is the first signal value recorded in the time period; if the AD i If the system shows a continuous downward trend, it is determined that the system is in a pre-end state. The AD0 dynamic value is the last signal value recorded within this time period. The real-time updated AD0 value is substituted into the concentration calculation formula.

[0016] Furthermore, the time period is 15 to 30 seconds.

[0017] Furthermore, the system stability refers to: the real-time signal value difference AD i -AD i-1 Less than 10.

[0018] Furthermore, the preheating time is 10 to 120 minutes.

[0019] Furthermore, the preheating time is 20 to 30 minutes.

[0020] Furthermore, the aging time does not exceed 72 hours.

[0021] The present invention discloses another device for shortening sensor power-up time and calibrating and calculating concentration, comprising:

[0022] Optimize the preheating time module: the sensor starts to power on and preheat; obtain the real-time signal value AD output every set time during the preheating process i , loop calculation and the previous signal value AD i-1 The signal value difference AD i -AD i-1 , i is the ordinal number, and the system is judged to be stable based on the difference of the signal value. If it is stable, the sensor ends preheating and the sensitivity of the sensor tends to be stable;

[0023] Get sensor real-time concentration module: Get the sensor's sensitivity k value and concentration V value. The calculation formula is as follows:

[0024]

[0025] Where: C 标定 is the known concentration value of the calibration gas; AD 标定 The output signal value of the sensor in the calibration gas environment; the signal value AD0 is the calibration value or dynamic value. The calibration value is the zero-point output signal value when the sensor is zeroed without gas;

[0026] Sensor incomplete aging execution module: When the sensor continues to age after preheating and is not yet fully aged, the system executes virtual zeroing, calibration, and readback mechanisms;

[0027] Virtual zeroing and calibration mechanism and readback mechanism module: Although the sensor will display the normal zeroing and calibration program status, the zeroing and AD0 calibration values ​​will not be used to calculate the sensitivity k value and concentration V value; at this time AD0 uses the real-time signal value AD obtained by the readback mechanism. i The dynamic value of AD0 is determined by the data situation.

[0028] Sensor complete aging module: The sensor is fully powered to ensure that it is completely aged.

[0029] Furthermore, the readback mechanism module includes an AD0 dynamic value determination module, which includes: obtaining a real-time signal value AD0 within a set time period; i And the signal value difference AD i -AD i-1 , if AD i Shows a non-continuous upward or downward trend and signal value difference AD i -AD i-1 <10, it is determined to be ventilation state, the zero point has not changed, and the current AD0 dynamic value remains unchanged. i If the system shows a continuous upward trend, it is judged that the system is in the ventilation state, and the AD0 dynamic value is the first signal value recorded in the time period; if the AD i If the system shows a continuous downward trend, it is determined that the system is in a pre-end state. The AD0 dynamic value is the last signal value recorded within this time period. The real-time updated AD0 value is substituted into the concentration calculation formula.

[0030] The technical effect of this invention is that it replaces the existing two-hour preheating mechanism with real-time monitoring of the change in the real-time signal value during the preheating process to see if it stabilizes. Therefore, the preheating operation can be stopped when the sensor sensitivity stabilizes (usually around 20 minutes), thus optimizing the preheating time from several hours to tens of minutes, avoiding damage to the sensor and shortening its lifespan due to excessive preheating, thereby significantly improving the sensor's efficiency and lifespan.

[0031] This invention uses a virtual zeroing and calibration mechanism to avoid measurement errors caused by zeroing and calibration operations before the sensor is fully aged. During the period after the sensor is powered on and before it is fully aged, the gas concentration is calculated using the factory-calibrated sensitivity and the dynamically monitored zero point, ensuring the accuracy and reliability of the measurement results. Only after the sensor is fully aged does the system allow the user to perform normal zeroing and calibration operations, further improving gas concentration accuracy.

[0032] The present invention significantly optimizes the preheating time of the sensor, reduces measurement errors caused by misoperation, reduces equipment maintenance costs and user usage costs, and has high economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A graph showing concentration variation over time for the method of optimizing sensor power-on time and calibrating concentration calculation according to the present invention;

[0034] Figure 2 is a flow chart of a method for optimizing sensor power-on time and calibrating calculated concentration according to the present invention;

[0035] Figure 3Schematic diagram of AD0 dynamic value obtained by dynamic monitoring zero point of the present invention;

[0036] Figure 4 This is a flow chart of the present invention for optimizing the sensor power-on time and calibrating the concentration calculation device. DETAILED DESCRIPTION

[0037] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention in specific circumstances.

[0041] Figure 1 The graph of the concentration change over time is a table of the present invention. The present invention is further explained below with reference to the graph. The first power-on time of detector i=1 is 12:36:04. When detector i=7 is powered on at 12:40:46 and 16ppm of SO2 gas is introduced in the 4th minute, the signal values ​​AD7=2076, AD6=2120, AD7-AD6=-44, AD i It is showing negative growth.

[0042] When i=15, power on for 10 minutes, power on time 12:46:25, 16ppm SO2 is introduced, AD i Value increase AD 15 -AD 14 =1748-1508=240. Similarly, when 16ppm SO2 was introduced at 12:56:25, 20 minutes after power-on and nearly 4 hours after power-on, AD i The value increase is about 320, indicating that AD i The amount of change has basically stabilized.

[0043] like Figure 2 As shown, the present invention discloses a method for optimizing sensor power-on time and calibrating concentration calculation, which includes the following steps:

[0044] The sensor starts to power on and preheat, and obtains the real-time signal value AD output every set time during the preheating process i , loop calculation and the previous signal value AD i-1 The signal value difference AD i -AD i-1 , i is the ordinal number. The system is judged to be stable based on the difference in the real-time signal values. If the difference in the real-time signal values ​​is less than 10, it is considered stable. If it is judged to be stable, the sensor optimization warm-up time ends early.

[0045] The present invention changes the original two-hour preheating mechanism to a real-time monitoring of the real-time signal value AD during the preheating process. i Whether the change in the amount tends to be stable.

[0046] Depend on Figure 1 It can be known that the first power-on time of sensor i=1 is 12:36:04. When sensor i=7 is powered on at 12:40:46 and 16ppm SO2 gas is introduced in the 4th minute, the signal values ​​AD7=2076, AD6=2120, AD7-AD6=-44, AD i It is showing negative growth.

[0047] When i=15, power on for 10 minutes, power on time 12:46:25, 16ppm SO2 is introduced, AD i Value increase AD 15 -AD 14 =1748-1508=240. Similarly, when 16ppm SO2 was introduced at 12:56:25, 20 minutes after power-on and nearly 4 hours after power-on, AD i The value increase is about 320, indicating that AD i The amount of change has basically stabilized.

[0048] In this embodiment, the preheating time is 20 minutes. Of course, 30 minutes, 40 minutes, or 50 minutes, etc., from 10 to 120 minutes can be selected. This improvement greatly optimizes the preheating time of the sensor and improves its usage efficiency.

[0049] When the sensor is powered on and preheated, the sensitivity and concentration tend to be stable. The system then begins to obtain the sensitivity k value and concentration V value of the sensor. The calculation formula is as follows:

[0050]

[0051] Where: C 标定 is the known concentration value of the calibration gas; AD 标定 The output signal value of the sensor in the calibration gas environment; the signal value AD0 is the calibration value or dynamic value. The calibration value is the zero-point output signal value when the sensor is zeroed without gas;

[0052] When the sensor continues to age after preheating and is not yet complete, gas is introduced for the same set time at multiple evenly selected time points. During this stage, the system performs virtual zeroing, calibration, and readback mechanisms.

[0053] The virtual zeroing and calibration mechanism and the readback mechanism include: although the sensor will display the normal zeroing and calibration program status, the zeroing and AD0 calibration values ​​at this time will not be used to calculate the sensitivity k value and concentration V value; at this time AD0 uses the real-time signal value AD obtained by the readback mechanism. i The dynamic value of AD0 is determined by the data situation.

[0054] Combine Figure 3 The steps of dynamically monitoring the zero point and updating AD0 of the present invention include: continuously collecting data, typically in a time period of 15 to 30 seconds. In this embodiment, analysis is performed in a time period of 15 seconds, and in this embodiment, a time period of 15 seconds is 15 seconds. If the data in the 15-second time period shows a continuous upward trend, the system is determined to be in a ventilation state, and the first second of the data in the 15-second time period is recorded as AD0. If the data in the 15-second time period continuously decreases, the last data in the period is recorded as AD0. If the data neither continuously increases nor continuously decreases, the zero point is determined to have not changed, and the current AD0 value is maintained unchanged.

[0055] The sensor must be fully charged to ensure that it has been fully aged. The aging time should not exceed 72 hours.

[0056] The present invention also includes a device for optimizing the sensor power-up time and calibrating the calculated concentration, comprising:

[0057] Optimize the preheating time module: the sensor starts to power on and preheat; obtain the real-time signal value AD output every set time during the preheating processi , loop calculation and the previous signal value AD i-1 The signal value difference AD i -AD i-1 , i is the ordinal number, and the system is judged to be stable based on the difference of the signal value. If it is stable, the sensor ends the preheating in advance and the preheating time is optimized;

[0058] Get sensor real-time concentration module: Get the sensor's sensitivity k value and concentration V value. The calculation formula is as follows:

[0059]

[0060] Where: C 标定 is the known concentration value of the calibration gas; AD 标定 The output signal value of the sensor in the calibration gas environment; the signal value AD0 is the calibration value or dynamic value. The calibration value is the zero-point output signal value when the sensor is zeroed without gas;

[0061] Sensor incomplete aging execution module: When the sensor continues to age after preheating and is not yet complete, the system is mostly in a non-ventilated state. Gas is evenly introduced at multiple time points for the same set time. During this stage, the system performs virtual zeroing, calibration, and readback mechanisms.

[0062] Virtual zeroing and calibration mechanism and readback mechanism module: Although the sensor will display the normal zeroing and calibration program status, the zeroing and AD0 calibration values ​​will not be used to calculate the sensitivity k value and concentration V value; at this time AD0 uses the real-time signal value AD obtained by the readback mechanism. i The AD0 dynamic value is determined by the data. After the sensor is fully charged and ensured to be fully aged, the virtual zeroing and calibration mechanism is released and the normal zeroing and calibration procedure is performed. AD0 adopts the calibration value of the normal zeroing and calibration procedure.

[0063] Sensor fully aged module: The sensor is fully powered and aged and begins to work normally.

[0064] Determined AD0 dynamic value module: First, obtain the real-time signal value AD within a set time period i If AD i If the system shows a continuous upward trend, it is determined that the system is in ventilation state, and the AD0 dynamic value is the first signal value recorded in this time period; if AD i It shows a continuous downward trend. The AD0 dynamic value is the last signal value recorded in this time period. iWhen the value is neither continuously rising nor continuously falling, it is determined that the zero point has not changed, the current AD0 dynamic value is maintained unchanged, and the real-time updated AD0 value is substituted into the concentration calculation formula. 标定 -AD0 is in a stable state, so the concentration read back is in a stable state.

[0065] The above embodiments are merely preferred embodiments for the purpose of fully illustrating the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are within the scope of protection of the present invention. The scope of protection of the present invention shall be subject to the claims.

Claims

1. A method for optimizing sensor power-on time and calibrating calculated concentration, characterized in that: It includes the following steps: The sensor starts to power on and preheat, and obtains the real-time signal value AD output every set time during the preheating process i , calculate and the previous signal value AD i-1 The signal value difference AD i -AD i-1 , i is the ordinal number; The system is judged to be stable based on the difference of the signal value. If the system is stable, the preheating is ended and the sensitivity measurement tends to be stable. Get the sensitivity k value and concentration V value of the sensor. The calculation formula is as follows: Where: C 标定 is the known concentration value of the calibration gas; AD 标定 The output signal value of the sensor in the calibration gas environment; the signal value AD0 is the calibration value or dynamic value. The calibration value is the zero-point output signal value when the sensor is zeroed without gas flowing into it; When the sensor is warmed up and aging is still in progress but not yet complete, the system performs virtual zeroing and calibration as well as readback mechanisms. The virtual zeroing and calibration mechanism and the readback mechanism include: although the sensor will display the normal zeroing and calibration program status, the zeroing and AD0 calibration values ​​at this time will not be used to calculate the sensitivity k value and concentration V value; at this time AD0 uses the real-time signal value AD obtained by the readback mechanism. i AD0 dynamic value determined by data conditions; The sensor is fully charged and has completely aged, and is now in normal working condition.

2. The method for optimizing sensor power-on time and calibrating calculated concentration according to claim 1, characterized in that: The readback mechanism obtains the real-time signal value AD i The steps to determine the dynamic value of AD0 according to the data situation are as follows: First, obtain the real-time signal value AD within a set time period. i And the signal value difference AD i -AD i-1 , if AD i Shows a non-continuous upward or downward trend and signal value difference AD i -AD i-1 <10, the zero point does not change, and the current AD0 dynamic value remains unchanged. i If the system shows a continuous upward trend, it is judged that the system is in the ventilation state, and the AD0 dynamic value is the first signal value recorded in the time period; if the AD i If the signal shows a continuous downward trend, the system is judged to be in a pre-end state. The AD0 dynamic value is the last signal value recorded within this time period. The AD0 value updated in real time is substituted into the concentration calculation formula.

3. The method for optimizing sensor power-on time and calibrating calculated concentration according to claim 2, characterized in that: The time period is 15 to 30 seconds.

4. The method for optimizing sensor power-on time and calibrating concentration calculation according to claim 1, characterized in that: The system stability mentioned above refers to: the real-time signal value difference AD i -AD i-1 Less than 10.

5. The method for optimizing sensor power-on time and calibrating calculated concentration according to claim 1, characterized in that: The preheating time is 10 to 120 minutes.

6. The method for optimizing sensor power-on time and calibrating calculated concentration according to claim 5, characterized in that: The preheating time is 20 to 30 minutes.

7. The method for optimizing sensor power-on time and calibrating calculated concentration according to claim 1, characterized in that: The aging time does not exceed 72 hours.

8. A device for shortening sensor power-up time and calibrating concentration calculation, characterized in that: include: Optimize the preheating time module: the sensor starts to power on and preheat; Get the real-time signal value AD output every set time during the preheating process i , loop calculation and the previous signal value AD i-1 The signal value difference AD i -AD i-1 , i is the ordinal number, and the system is judged to be stable based on the difference of the signal value. If it is stable, the sensor ends preheating and the sensitivity of the sensor tends to be stable; Get sensor real-time concentration module: Get the sensor's sensitivity k value and concentration V value. The calculation formula is as follows: Where: C 标定 is the known concentration value of the calibration gas; AD 标定 The output signal value of the sensor in the calibration gas environment; the signal value AD0 is the calibration value or dynamic value. The calibration value is the zero-point output signal value when the sensor is zeroed without gas; Sensor incomplete aging execution module: When the sensor continues to age after preheating and is not yet complete, the system executes virtual zeroing and calibration mechanisms and readback mechanisms; Virtual zeroing and calibration mechanism and readback mechanism module: Although the sensor will display the normal zeroing and calibration program status, the zeroing and AD0 calibration values ​​will not be used to calculate the sensitivity k value and concentration V value; at this time AD0 uses the real-time signal value AD obtained by the readback mechanism. i The dynamic value of AD0 is determined by the data situation. Sensor complete aging module: The sensor is fully powered to ensure that it is completely aged.

9. The device for optimizing sensor power-on time and calibrating calculated concentration according to claim 8, characterized in that: The readback mechanism module includes an AD0 dynamic value determination module, which includes: obtaining a real-time signal value AD0 within a set time period. i And the signal value difference AD i -AD i-1 , if AD i Shows a non-continuous upward or downward trend and signal value difference AD i -AD i-1 <10, it is determined to be ventilation state, the zero point has not changed, and the current AD0 dynamic value remains unchanged. i If the system shows a continuous upward trend, it is judged that the system is in the ventilation state, and the AD0 dynamic value is the first signal value recorded in the time period; if the AD i If the system shows a continuous downward trend, it is determined that the system is in a pre-end state. The AD0 dynamic value is the last signal value recorded within this time period. The real-time updated AD0 value is substituted into the concentration calculation formula.

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