An oxygen sensor structure used in a general environment and a measurement method thereof

Abstract

The present invention relates to an oxygen sensor structure used in a general environment and a measurement method thereof, wherein the oxygen sensor structure comprises a probe, a control circuit board, a display screen and a housing, wherein the probe and the control circuit board are respectively arranged in the housing, and the probe is electrically connected to the control circuit board, and the display screen is arranged on the side wall of the housing, and the display screen is electrically connected to the control circuit board. The present invention arranges the probe and the control circuit board in the housing respectively, and does not need to arrange a reference air channel, so that the volume of the entire oxygen sensor mechanism can be very small, and the use is more flexible, and by arranging a display screen on the housing, the detection result can be displayed in real time, which is very convenient, and the heating power consumption can be greatly reduced by reasonable adjustment of the control circuit board.

Description

Technical Field

[0001] The invention relates to the technical field of oxygen content measurement, and in particular to an oxygen sensor structure used in a general environment and a measurement method thereof. Background Art

[0002] Different from the oxygen sensors used for automobile exhaust emission control, oxygen sensors are increasingly used in the general environment, such as our daily home environment, especially places with high traffic density, where the oxygen concentration will be insufficient; for example, in the food storage and transportation chain or cold chain environment, a weak oxygen or inert environment is required to prevent food spoilage; and in bakeries or similar specific places, it is necessary to maintain a higher or lower oxygen concentration, which requires oxygen sensors.

[0003] Zirconia electrochemical oxygen sensors are usually stable and good, and are considered to be suitable for such places. However, zirconia electrochemical oxygen sensors were previously mainly used for automobile exhaust emission control, and some structural designs and working modes are not suitable, such as being too large in size and too high in heating power consumption. Therefore, corresponding improvements are needed. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an oxygen sensor structure and a measurement method for general use in an environment in view of the above-mentioned deficiencies in the prior art.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: an oxygen sensor structure used in a general environment, comprising a probe, a control circuit board, a display screen and a shell, wherein the probe and the control circuit board are respectively arranged in the shell, and the probe is electrically connected to the control circuit board, and the display screen is arranged on the side wall of the shell, and the display screen is electrically connected to the control circuit board.

[0006] The beneficial effects of the present invention are as follows: the oxygen sensor structure used in a general environment of the present invention, by respectively arranging the probe and the control circuit board in the shell, does not need to set a reference air channel, so that the volume of the entire oxygen sensor mechanism can be very small, and it is more flexible to use; by arranging a display screen on the shell, the detection result can be displayed in real time, which is very convenient; and by reasonable adjustment of the control circuit board, the heating power consumption can be greatly reduced.

[0007] On the basis of the above technical solution, the present invention can also be improved as follows:

[0008] Further: the probe includes a chip, a base with a hollow interior and a lead connector, the chip is arranged on the upper part of the base, and the upper end of the chip extends upward from the upper end of the base, and the lower end of the chip is electrically connected to the control circuit board through the lead connector.

[0009] The beneficial effect of the above further solution is that by arranging the chip on the upper part of the base and extending it out of the base, on the one hand, the volume of the entire probe can be reduced, and on the other hand, it can be easily contacted with the air and the oxygen content value can be accurately detected.

[0010] Further: the probe also includes a protective cover, which is arranged at the upper end of the probe, and the upper end of the chip is located in the protective cover.

[0011] The beneficial effect of the above further scheme is that by providing the protective cover, the chip can be protected to prevent the chip from being impacted by external forces from the environment, and the air in the environment can directly reach the head sensing area of ​​the chip, thereby ensuring the accuracy of the detection results.

[0012] The present invention also provides an oxygen sensor structure for use in a general environment, comprising a probe, a control circuit board, a display screen and a shell, wherein the control circuit board is arranged in the shell, the display screen is arranged on the side wall of the shell, and the display screen is electrically connected to the control circuit board, the probe is located outside the shell, and the probe is electrically connected to a first socket through a lead connector, the control circuit board is electrically connected to a second socket through a lead connector extending out of the shell, and the first socket is plugged in and electrically connected to the second socket.

[0013] The oxygen sensor structure used in a general environment of the present invention can protect the control circuit board by arranging the control circuit board in the shell, and is conducive to reducing the volume of the entire oxygen sensor structure. By arranging a display screen on the shell, the detection result can be displayed in real time, which is very convenient. Through the lead connector, the first socket and the second socket, the probe and the shell can be separated to meet the needs of different application scenarios. Through the reasonable adjustment of the control circuit board, the heating power consumption can be greatly reduced.

[0014] On the basis of the above technical solution, the present invention can also be improved as follows:

[0015] Further: the probe includes a chip, a base with a hollow interior and a lead connector, the chip is arranged on the upper part of the base, and the upper end of the chip extends upward from the upper end of the base, and the lower end of the chip is electrically connected to the control circuit board through the lead connector.

[0016] The beneficial effect of the above further solution is that by arranging the chip on the upper part of the base and extending it out of the base, on the one hand, the volume of the entire probe can be reduced, and on the other hand, it can be easily contacted with the air and the oxygen content value can be accurately detected.

[0017] Further: the probe also includes a protective cover, which is arranged at the upper end of the probe, and the upper end of the chip is located in the protective cover.

[0018] The beneficial effect of the above further scheme is that by providing the protective cover, the chip can be protected to prevent the chip from being impacted by external forces from the environment, and the air in the environment can directly reach the head sensing area of ​​the chip, thereby ensuring the accuracy of the detection results.

[0019] The present invention also provides a measurement method for the oxygen sensor structure used in the general environment, comprising the following steps:

[0020] S1: Start heating the probe after power-on and measure the internal resistance at the same time, and continue heating after the internal resistance reaches the first internal resistance R1;

[0021] S2: judging whether the internal resistance reaches the second internal resistance R2, stopping heating after the internal resistance reaches the second internal resistance R2, measuring the corresponding limiting current, calibrating and outputting the oxygen content value;

[0022] S3: maintaining the heating temperature of the probe and continuously measuring the internal resistance and the limiting current, converting the corresponding oxygen content value according to the limiting current and displaying it;

[0023] The first internal resistance R1 is the internal resistance corresponding to the dew point temperature, the second internal resistance R2 is the internal resistance of the oxygen pump when the limiting current is on, and R1>R2.

[0024] The measuring method of the oxygen sensor structure used in the general environment of the present invention continues heating after the internal resistance reaches the internal resistance R1 corresponding to the dew point temperature, and determines whether the internal resistance reaches the working resistance R2 of the oxygen pump when the limiting current is reached. In this way, heating can be stopped after the limiting current is reached, and the oxygen content value can be converted according to the limiting current, and the output is continuously measured, thereby effectively reducing the heating power consumption.

[0025] The present invention also provides a measurement method for the oxygen sensor structure used in the general environment, comprising the following steps:

[0026] S1: Calibrate interruption time and reset time;

[0027] S2: start timing, and start heating the probe after power-on;

[0028] S3: after the internal resistance reaches the first internal resistance R1, determine whether the interruption time has been reached. If so, directly display the oxygen content value during the interruption time, wait for the reset time to be reached and reset the timer, and return to S2. Otherwise, continue to heat the probe and enter S4.

[0029] S4: determining whether the internal resistance reaches the second internal resistance R2, stopping heating after the internal resistance reaches the second internal resistance R2, loading the oxygen pump voltage to start the oxygen pump, and measuring the oxygen pump current at the same time;

[0030] S5: comparing the measured value of the oxygen pump current with the set calibration value, outputting the oxygen content value according to the comparison result, and displaying it;

[0031] The first internal resistance R1 is the internal resistance corresponding to the dew point temperature, the second internal resistance R2 is the internal resistance of the oxygen pump when the limiting current is on, and R1>R2.

[0032] The measuring method of the oxygen sensor structure used in the general environment of the present invention sets the interruption time and the reset time, and determines whether the interruption time is reached after the internal resistance reaches the internal resistance R1 corresponding to the dew point temperature. If so, the oxygen content value during the interruption time is directly displayed. Otherwise, it is determined whether the internal resistance reaches the working resistance R2 of the oxygen pump when the limiting current is reached. In this way, heating can be stopped after the limiting current is reached, and the oxygen content value is converted according to the limiting current, and the output is continuously measured, which effectively reduces the heating power consumption.

[0033] On the basis of the above technical solution, the present invention can also be improved as follows:

[0034] Further: outputting the oxygen content value according to the comparison result specifically includes the following steps:

[0035] The specific constant K of the oxygen sensor is calibrated according to the relationship between the limiting current value and the oxygen content in the ambient atmosphere:

[0036] I=kC [O2]

[0037] Based on the measured limiting current I value, the oxygen content value is calculated by comparison.

[0038] The beneficial effect of the above further solution is that it overcomes the difference in displayed oxygen content caused by differences in individual structural parameters of the oxygen sensor, so that the same oxygen content measurement result can be achieved in the same oxygen content environment, thereby improving the measurement accuracy and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A schematic diagram of the structure of an oxygen sensor according to an embodiment of the present invention;

[0040] Figure 2 A schematic diagram of the structure of a probe according to an embodiment of the present invention;

[0041] Figure 3 A schematic diagram of the structure of an oxygen sensor according to another embodiment of the present invention Figure 1 ;

[0042] Figure 4 A schematic diagram of the structure of an oxygen sensor according to another embodiment of the present invention Figure 2 ;

[0043] Figure 5 A method for measuring an oxygen sensor structure according to an embodiment of the present invention;

[0044] Figure 6 This is a measurement method for an oxygen sensor structure according to another embodiment of the present invention.

[0045] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0046] 1. Chip, 2. Protective cover, 3. Base, 4. Lead connector, 5. Probe, 6. Control circuit board, 7. Display screen, 8. Housing, 91. First socket, 92. Second socket. DETAILED DESCRIPTION

[0047] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0048] Example 1

[0049] like Figure 1 and Figure 2 As shown, an oxygen sensor structure used in a general environment includes a probe 5, a control circuit board 6, a display screen 7 and a shell 8, wherein the probe 5 and the control circuit board 6 are respectively arranged in the shell 8, and the probe 5 is electrically connected to the control circuit board 6, and the display screen 7 is arranged on the side wall of the shell 8, and the display screen 7 is electrically connected to the control circuit board 6.

[0050] The oxygen sensor structure used in a general environment of the present invention, by respectively arranging the probe 5 and the control circuit board 6 in the housing 8, does not need to set a reference air channel, so that the volume of the entire oxygen sensor mechanism can be very small, and it is more flexible to use. By arranging a display screen 7 on the housing 8, the detection result can be displayed in real time, which is very convenient, and the heating power consumption can be greatly reduced by reasonable adjustment of the control circuit board 6.

[0051] Optionally, based on the above technical solution, the probe 5 includes a chip 1, a base 3 with a hollow interior, and a lead connector 4, wherein the chip 1 is arranged on the upper part of the base 3, and the upper end of the chip 1 extends upward from the upper end of the base 3, and the lower end of the chip 1 is electrically connected to the control circuit board 6 through the lead connector 4. By arranging the chip 1 on the upper part of the base 3 and extending out of the base 3, on the one hand, the volume of the entire probe 5 can be reduced, and on the other hand, it can be convenient to contact with the air and accurately detect the oxygen content value.

[0052] Optionally, based on the above technical solution, the probe 5 further includes a protective cover 2, which is arranged at the upper end of the probe 5, and the upper end of the chip 1 is located in the protective cover 2. By providing the protective cover 2, the chip 1 can be protected to prevent the chip 1 from being impacted by external forces from the environment, and the air in the environment can directly reach the head sensing area of ​​the chip 1, thereby ensuring the accuracy of the detection result.

[0053] Example 2

[0054] like Figure 3 and Figure 4 As shown, an oxygen sensor structure used in a general environment includes a probe 5, a control circuit board 6, a display screen 7 and a shell 8, wherein the control circuit board 6 is arranged in the shell 8, the display screen 7 is arranged on the side wall of the shell 8, and the display screen 7 is electrically connected to the control circuit board 6, the probe 5 is located outside the shell 8, and the probe 5 is electrically connected to a first socket 91 through a lead connector 4, the control circuit board 6 is electrically connected to a second socket 92 through the lead connector 4 extending out of the shell 8, and the first socket 91 is plugged and electrically connected to the second socket 92.

[0055] The oxygen sensor structure used in a general environment of the present invention, by arranging the control circuit board 6 in the shell 8, can protect the control circuit board 6 and help reduce the volume of the entire oxygen sensor structure. By arranging a display screen 7 on the shell 8, the detection result can be displayed in real time, which is very convenient. Through the lead connector 4, the first socket 91 and the second socket 92, the probe 5 and the shell 8 can be separated to meet the needs of different application scenarios. By reasonably adjusting the control circuit board 6, the heating power consumption can be greatly reduced.

[0056] Optionally, based on the above technical solution, the probe 5 includes a chip 1, a base 3 with a hollow interior, and a lead connector 4, wherein the chip 1 is arranged on the upper part of the base 3, and the upper end of the chip 1 extends upward from the upper end of the base 3, and the lower end of the chip 1 is electrically connected to the control circuit board 6 through the lead connector 4. By arranging the chip 1 on the upper part of the base 3 and extending out of the base 3, on the one hand, the volume of the entire probe 5 can be reduced, and on the other hand, it can be convenient to contact with the air and accurately detect the oxygen content value.

[0057] Optionally, based on the above technical solution, the probe 5 further includes a protective cover 2, which is arranged at the upper end of the probe 5, and the upper end of the chip 1 is located in the protective cover 2. By providing the protective cover 2, the chip 1 can be protected to prevent the chip 1 from being impacted by external forces from the environment, and the air in the environment can directly reach the head sensing area of ​​the chip 1, thereby ensuring the accuracy of the detection result.

[0058] Example 3

[0059] like Figure 5 As shown, a measurement method based on the oxygen sensor structure used in the general environment includes the following steps:

[0060] S1: after power-on, the probe 5 starts to be heated and the internal resistance is measured at the same time, and the heating is continued after the internal resistance reaches the first internal resistance R1;

[0061] S2: judging whether the internal resistance reaches the second internal resistance R2, stopping heating after the internal resistance reaches the second internal resistance R2, measuring the corresponding limiting current, calibrating and outputting the oxygen content value;

[0062] S3: maintaining the heating temperature of the probe 5 and continuously measuring the internal resistance and the limiting current, converting the corresponding oxygen content value according to the limiting current and displaying it;

[0063] The first internal resistance R1 is the internal resistance corresponding to the dew point temperature, the second internal resistance R2 is the internal resistance of the oxygen pump when the limiting current is on, and R1>R2.

[0064] The measuring method of the oxygen sensor structure used in the general environment of the present invention continues heating after the internal resistance reaches the internal resistance R1 corresponding to the dew point temperature, and determines whether the internal resistance reaches the working resistance R2 of the oxygen pump when the limiting current is reached. In this way, heating can be stopped after the limiting current is reached, and the oxygen content value can be converted according to the limiting current, and the output is continuously measured, thereby effectively reducing the heating power consumption.

[0065] Embodiment 4,

[0066] like Figure 6 As shown, a measurement method based on the oxygen sensor structure used in the general environment includes the following steps:

[0067] S1: Calibrate interruption time and reset time;

[0068] S2: Start timing, and start heating the probe 5 after power-on;

[0069] S3: after the internal resistance reaches the first internal resistance R1, determine whether the interruption time has been reached. If so, directly display the oxygen content value during the interruption time, wait for the reset time to be reached and reset the timer, and return to S2. Otherwise, continue to heat the probe 5 and enter S4.

[0070] S4: determining whether the internal resistance reaches the second internal resistance R2, stopping heating after the internal resistance reaches the second internal resistance R2, loading the oxygen pump voltage to start the oxygen pump, and measuring the oxygen pump current at the same time;

[0071] S5: comparing the measured value of the oxygen pump current with the set calibration value, outputting the oxygen content value according to the comparison result, and displaying it;

[0072] The first internal resistance R1 is the internal resistance corresponding to the dew point temperature, the second internal resistance R2 is the internal resistance of the oxygen pump when the limiting current is on, and R1>R2.

[0073] The measuring method of the oxygen sensor structure used in the general environment of the present invention sets the interruption time and the reset time, and determines whether the interruption time is reached after the internal resistance reaches the internal resistance R1 corresponding to the dew point temperature. If so, the oxygen content value during the interruption time is directly displayed. Otherwise, it is determined whether the internal resistance reaches the working resistance R2 of the oxygen pump when the limiting current is reached. In this way, heating can be stopped after the limiting current is reached, and the oxygen content value is converted according to the limiting current, and the output is continuously measured, which effectively reduces the heating power consumption.

[0074] Specifically, the interruption time and the reset time can be calibrated according to actual conditions. For example, the interruption time is calibrated to five minutes and the reset time is calibrated to one hour. In S3, after the internal resistance reaches the first internal resistance R1, it is determined whether the timing is full for five minutes. If so, the oxygen content value within five minutes is directly displayed, and after waiting for the reset time of one hour to arrive, the timing is reset, and the circuit returns to S2 to enter the next cycle. In S2, if it is determined that the timing is less than five minutes after the internal resistance reaches the first internal resistance R1, the probe 5 is directly continued to be heated, and S4 is entered to determine whether the internal resistance reaches the second internal resistance R2. After the internal resistance reaches the second internal resistance R2, the heating is stopped, and the oxygen pump voltage is loaded to start the oxygen pump, and the oxygen pump current is measured at the same time. Then, S5 is entered to compare the measured value of the oxygen pump current with the set calibration value, and the oxygen content value is output according to the comparison result and displayed.

[0075] Optionally, based on the above technical solution, outputting the oxygen content value according to the comparison result specifically includes the following steps:

[0076] The specific constant K of the oxygen sensor is calibrated according to the relationship between the limiting current value and the oxygen content in the ambient atmosphere:

[0077] I=kC [O2]

[0078] Based on the measured limiting current I value, the oxygen content value is calculated by comparison.

[0079] The limiting current value in the air is 500-600uA. The limiting current value is proportional to the oxygen content in the ambient atmosphere, I = kC [O2] The k value is determined by calibration in a given atmosphere. The differences in structural parameters of different oxygen sensors will lead to different k values, so each sensor needs to be calibrated. After calibration, the actual ambient oxygen content can be given by comparison based on the measured limiting current I value in the specific use environment.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for measuring an oxygen sensor structure used in a general environment, characterized in that: The oxygen sensor structure used in a general environment comprises a probe (5), a control circuit board (6), a display screen (7) and a housing (8); the probe (5) and the control circuit board (6) are respectively arranged in the housing (8), and the probe (5) is electrically connected to the control circuit board (6); the display screen (7) is arranged on a side wall of the housing (8), and the display screen (7) is electrically connected to the control circuit board (6); The measuring method comprises the following steps: S1: after power-on, the probe (5) starts to be heated and the internal resistance is measured at the same time, and the heating is continued after the internal resistance reaches a first internal resistance R1; S2: judging whether the internal resistance reaches the second internal resistance R2, stopping heating after the internal resistance reaches the second internal resistance R2, measuring the corresponding limiting current, calibrating and outputting the oxygen content value; S3: maintaining the heating temperature of the probe (5) and continuously measuring the internal resistance and the limiting current, converting the corresponding oxygen content value according to the limiting current and displaying it; The first internal resistance R1 is the internal resistance corresponding to the dew point temperature, the second internal resistance R2 is the internal resistance of the oxygen pump when the limiting current is on, and R1>R2.

2. The method for measuring the oxygen sensor structure used in a general environment according to claim 1, characterized in that: The probe (5) comprises a chip (1), a base (3) with a hollow interior, and a lead connector (4); the chip (1) is arranged on the upper part of the base (3), and the upper end of the chip (1) extends upward from the upper end of the base (3); the lower end of the chip (1) is electrically connected to the control circuit board (6) via the lead connector (4).

3. The method for measuring the oxygen sensor structure used in a general environment according to claim 2, characterized in that: The probe (5) further comprises a protective cover (2), wherein the protective cover (2) is arranged at the upper end of the probe (5), and the upper end of the chip (1) is located inside the protective cover (2).

4. A method for measuring the structure of an oxygen sensor used in a general environment, characterized in that: The oxygen sensor structure for general use comprises a probe (5), a control circuit board (6), a display screen (7) and a housing (8); the control circuit board (6) is arranged in the housing (8); the display screen (7) is arranged on a side wall of the housing (8); the display screen (7) is electrically connected to the control circuit board (6); the probe (5) is located outside the housing (8); the probe (5) is electrically connected to a first socket (91) through a lead connector (4); the control circuit board (6) is electrically connected to a second socket (92) through a lead connector (4) extending out of the housing (8); the first socket (91) and the second socket (92) are plugged in and electrically connected; The measuring method comprises the following steps: S1: after power-on, the probe (5) starts to be heated and the internal resistance is measured at the same time, and the heating is continued after the internal resistance reaches a first internal resistance R1; S2: judging whether the internal resistance reaches the second internal resistance R2, stopping heating after the internal resistance reaches the second internal resistance R2, measuring the corresponding limiting current, calibrating and outputting the oxygen content value; S3: maintaining the heating temperature of the probe (5) and continuously measuring the internal resistance and the limiting current, converting the corresponding oxygen content value according to the limiting current and displaying it; The first internal resistance R1 is the internal resistance corresponding to the dew point temperature, the second internal resistance R2 is the internal resistance of the oxygen pump when the limiting current is on, and R1>R2.

5. The method for measuring the oxygen sensor structure used in a general environment according to claim 4, characterized in that: The probe (5) comprises a chip (1), a base (3) with a hollow interior, and a lead connector (4); the chip (1) is arranged on the upper part of the base (3), and the upper end of the chip (1) extends upward from the upper end of the base (3); the lower end of the chip (1) is electrically connected to the control circuit board (6) via the lead connector (4).

6. The method for measuring the oxygen sensor structure used in a general environment according to claim 5, characterized in that: The probe (5) further comprises a protective cover (2), wherein the protective cover (2) is arranged at the upper end of the probe (5), and the upper end of the chip (1) is located inside the protective cover (2).

7. A method for measuring the structure of an oxygen sensor used in a general environment, characterized in that: The oxygen sensor structure used in a general environment comprises a probe (5), a control circuit board (6), a display screen (7) and a housing (8); the probe (5) and the control circuit board (6) are respectively arranged in the housing (8), and the probe (5) is electrically connected to the control circuit board (6); the display screen (7) is arranged on a side wall of the housing (8), and the display screen (7) is electrically connected to the control circuit board (6); The measuring method comprises the following steps: S1: Calibrate interruption time and reset time; S2: start timing, and start heating the probe (5) after power-on; S3: after the internal resistance of the probe (5) reaches the first internal resistance R1, determine whether the interruption time has been reached; if so, directly display the oxygen content value during the interruption time, wait for the reset time to be reached, reset the timer, and return to S2; otherwise, continue to heat the probe (5) and enter S4; S4: determining whether the internal resistance reaches the second internal resistance R2, stopping heating after the internal resistance reaches the second internal resistance R2, loading the oxygen pump voltage to start the oxygen pump, and measuring the oxygen pump current at the same time; S5: comparing the measured value of the oxygen pump current with the set calibration value, outputting the oxygen content value according to the comparison result, and displaying it; The first internal resistance R1 is the internal resistance corresponding to the dew point temperature, the second internal resistance R2 is the internal resistance of the oxygen pump when the limiting current is on, and R1>R2.

8. The method for measuring the oxygen sensor structure used in a general environment according to claim 7, characterized in that: The probe (5) comprises a chip (1), a base (3) with a hollow interior, and a lead connector (4); the chip (1) is arranged on the upper part of the base (3), and the upper end of the chip (1) extends upward from the upper end of the base (3); the lower end of the chip (1) is electrically connected to the control circuit board (6) via the lead connector (4).

9. The method for measuring the oxygen sensor structure used in a general environment according to claim 8, characterized in that: The probe (5) further comprises a protective cover (2), wherein the protective cover (2) is arranged at the upper end of the probe (5), and the upper end of the chip (1) is located inside the protective cover (2).

10. The method for measuring the oxygen sensor structure used in a general environment according to claim 9, characterized in that: Outputting the oxygen content value according to the comparison result specifically includes the following steps: The constant K of the oxygen sensor is calibrated according to the relationship between the limiting current value and the oxygen content in the ambient atmosphere: I=kC [O2] Based on the measured limiting current I value, the oxygen content value is calculated by comparison.

11. A method for measuring an oxygen sensor structure used in a general environment, characterized in that: The oxygen sensor structure for general use comprises a probe (5), a control circuit board (6), a display screen (7) and a housing (8); the control circuit board (6) is arranged in the housing (8); the display screen (7) is arranged on a side wall of the housing (8); the display screen (7) is electrically connected to the control circuit board (6); the probe (5) is located outside the housing (8); the probe (5) is electrically connected to a first socket (91) through a lead connector (4); the control circuit board (6) is electrically connected to a second socket (92) through a lead connector (4) extending out of the housing (8); the first socket (91) and the second socket (92) are plugged in and electrically connected; The measuring method comprises the following steps: S1: Calibrate interruption time and reset time; S2: start timing, and start heating the probe (5) after power-on; S3: after the internal resistance of the probe (5) reaches the first internal resistance R1, determine whether the interruption time has been reached; if so, directly display the oxygen content value during the interruption time, wait for the reset time to be reached, reset the timer, and return to S2; otherwise, continue to heat the probe (5) and enter S4; S4: determining whether the internal resistance reaches the second internal resistance R2, stopping heating after the internal resistance reaches the second internal resistance R2, loading the oxygen pump voltage to start the oxygen pump, and measuring the oxygen pump current at the same time; S5: comparing the measured value of the oxygen pump current with the set calibration value, outputting the oxygen content value according to the comparison result, and displaying it; The first internal resistance R1 is the internal resistance corresponding to the dew point temperature, the second internal resistance R2 is the internal resistance of the oxygen pump when the limiting current is on, and R1>R2.

12. The method for measuring the oxygen sensor structure used in a general environment according to claim 11, characterized in that: The probe (5) comprises a chip (1), a base (3) with a hollow interior, and a lead connector (4); the chip (1) is arranged on the upper part of the base (3), and the upper end of the chip (1) extends upward from the upper end of the base (3); the lower end of the chip (1) is electrically connected to the control circuit board (6) via the lead connector (4).

13. The method for measuring the oxygen sensor structure used in a general environment according to claim 12, characterized in that: The probe (5) further comprises a protective cover (2), wherein the protective cover (2) is arranged at the upper end of the probe (5), and the upper end of the chip (1) is located inside the protective cover (2).

14. The method for measuring the oxygen sensor structure used in a general environment according to claim 13, characterized in that: Outputting the oxygen content value according to the comparison result specifically includes the following steps: The constant K of the oxygen sensor is calibrated according to the relationship between the limiting current value and the oxygen content in the ambient atmosphere: I=kC [O2] Based on the measured limiting current I value, the oxygen content value is calculated by comparison.

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