阅读说明：本技术 氧传感器的大气标定方法、大气标定装置和大气标定系统 (Atmospheric calibration method, atmospheric calibration device and atmospheric calibration system of oxygen sensor ) 是由 唐行辉 马海明 游凯 于 2020-06-29 设计创作，主要内容包括：本申请提供了一种氧传感器的大气标定方法、大气标定装置和大气标定系统,该方法包括：获取步骤：在接收到燃气机组的启动命令的情况下,获取上个钥匙循环记录的发动机的状态参数,状态参数包括失火率和/或爆震率；确定步骤：在状态参数大于对应的预定阈值的情况下,确定氧传感器需要进行大气标定；控制步骤：控制燃气机组执行预定操作,使得氧传感器周围的预定区域内为新鲜空气,控制对氧传感器进行加热到预定温度,从而使得氧传感器自动进行检测,得到检测数据,其中,预定区域为排气管内的区域；处理步骤：接收检测数据,并根据检测数据确定第一修正系数。上述方法无需将氧传感器拆卸下来进行大气标定,减少了人工成本和时间成本。(The application provides an atmosphere calibration method, an atmosphere calibration device and an atmosphere calibration system of an oxygen sensor, wherein the method comprises the following steps: an acquisition step: under the condition of receiving a starting command of a gas turbine unit, acquiring state parameters of an engine recorded by the previous key cycle, wherein the state parameters comprise a misfire rate and/or an explosion rate; a determination step: determining that the oxygen sensor needs to be subjected to atmospheric calibration under the condition that the state parameter is greater than a corresponding preset threshold value; the control steps are as follows: controlling a gas turbine set to execute preset operation so that fresh air is in a preset area around an oxygen sensor, and controlling the oxygen sensor to be heated to a preset temperature so that the oxygen sensor automatically detects to obtain detection data, wherein the preset area is an area in an exhaust pipe; the processing steps are as follows: the detection data is received and a first correction factor is determined based on the detection data. According to the method, the oxygen sensor does not need to be disassembled for atmospheric calibration, so that the labor cost and the time cost are reduced.)

1. An atmospheric calibration method of an oxygen sensor, wherein the oxygen sensor is positioned on an exhaust pipe of a gas turbine unit, is characterized by comprising the following steps:

an acquisition step: under the condition of receiving a starting command of the gas turbine unit, acquiring state parameters of the engine recorded by the last key cycle, wherein the state parameters comprise a misfire rate and/or an explosion rate;

a determination step: determining that the oxygen sensor needs to be calibrated in atmosphere when the state parameter is larger than a corresponding preset threshold value;

the control steps are as follows: controlling the gas turbine set to execute a preset operation so that fresh air exists in a preset area around the oxygen sensor, and controlling the oxygen sensor to be heated to a preset temperature so that the oxygen sensor automatically detects to obtain detection data, wherein the preset area is an area in the exhaust pipe;

the processing steps are as follows: and receiving the detection data, and determining a first correction coefficient according to the detection data.

2. The method according to claim 1, wherein the gas turbine unit further comprises an air line, a gas line, a mixing line, an engine, a throttle valve, and a fuel valve, wherein one end of the air line is connected to an air inlet of the engine, one end of the gas line is connected to a gas inlet of the engine, one end of the mixing line is connected to the other end of the air line and the other end of the gas line, respectively, the engine comprises a starter, the throttle valve is disposed on the mixing line, and the fuel valve is disposed on the gas line,

controlling the gas turbine to perform a predetermined operation such that fresh air is present in a predetermined area around the oxygen sensor, including:

controlling the fuel valve to close, cutting off ignition and opening the throttle valve;

and controlling the starter to drive the engine to run for a first preset time, so that the gas in the exhaust pipe is the fresh air.

3. The method of claim 1, wherein after obtaining the first correction factor, the method further comprises:

determining whether the first correction coefficient is within a predetermined range;

under the condition that the first correction coefficient is within the preset range, determining that the oxygen sensor is not distorted, storing the first correction coefficient, and controlling the gas turbine set to execute the starting command;

and in the case that the first correction coefficient is not within the predetermined range, repeatedly executing the control step and the processing step to obtain a second correction coefficient.

4. The method of claim 3, wherein after obtaining the second correction factor, the method further comprises:

determining whether the second correction coefficient is within the predetermined range;

under the condition that the second correction coefficient is within the preset range, determining that the oxygen sensor is not distorted, storing the second correction coefficient, and controlling the gas turbine set to execute the starting command;

and under the condition that the second correction coefficient is not in the preset range, determining that the oxygen sensor is distorted and cannot be corrected, and sending prompt information for prompting to replace the oxygen sensor.

5. The method of claim 4, wherein after issuing the prompt message, and in the event that the oxygen sensor is not replaced, the method further comprises:

under the condition of receiving a forced starting command, controlling the gas unit to execute the starting command;

controlling an operating parameter of the gas turbine unit to be less than a corresponding predetermined value until the oxygen sensor is replaced, wherein the operating parameter includes at least one of an operating power and an operating duration.

6. The method of claim 1, further comprising:

under the condition that the state parameter is smaller than or equal to the corresponding preset threshold value, acquiring the time interval between the current time and the last atmospheric calibration time of the oxygen sensor;

executing the control step and the processing step in a case where the time interval is greater than or equal to a second predetermined time;

and controlling the gas turbine set to execute the starting command under the condition that the time interval is smaller than the second preset time.

7. The method according to claim 6, wherein the gas turbine unit further comprises an air line, a gas line, a mixing line, a throttle valve, and a fuel valve, wherein one end of the air line is connected to an air inlet of the engine, one end of the gas line is connected to a gas inlet of the engine, one end of the mixing line is connected to the other end of the air line and the other end of the gas line, respectively, the throttle valve is disposed on the mixing line, and the fuel valve is disposed on the gas line,

controlling the gas turbine set to execute the starting command, including:

controlling the fuel valve to be opened so as to introduce fuel gas into the gas turbine set;

controlling the opening degree of the throttle valve to be a preset opening degree;

and controlling the ignition to be ready.

8. An atmosphere calibration device of an oxygen sensor, wherein the oxygen sensor is positioned on an exhaust pipe of a gas turbine unit, and the atmosphere calibration device is characterized by comprising:

the acquiring unit is used for acquiring the state parameters of the engine recorded by the previous key cycle under the condition of receiving a starting command of the gas turbine unit, wherein the state parameters comprise a misfire rate and/or an explosion rate;

the determining unit is used for determining that the oxygen sensor needs to be calibrated in the atmosphere when the state parameter is larger than a corresponding first preset threshold value;

the first control unit is used for controlling the gas turbine unit to execute preset operation, so that fresh air exists in a preset area around the oxygen sensor, the oxygen sensor is controlled to be heated to a preset temperature, the oxygen sensor automatically detects the fresh air, and detection data are obtained, wherein the preset area is an area in the exhaust pipe;

and the processing unit is used for receiving the detection data and determining a first correction coefficient according to the detection data.

9. A computer-readable storage medium, comprising a stored program, wherein,

the program executes the atmospheric calibration method according to any one of claims 1 to 7.

10. A processor, characterized in that the processor is configured to run a program, wherein the program is configured to execute the atmospheric calibration method according to any one of claims 1 to 7 when running.

11. An atmosphere calibration system comprising an atmosphere calibration device, an oxygen sensor and a gas turbine, wherein the atmosphere calibration device is used for executing the atmosphere calibration method of any one of claims 1 to 7.

Technical Field

The application relates to the technical field of oxygen sensors, in particular to an atmosphere calibration method, an atmosphere calibration device, a computer-readable storage medium, a processor and an atmosphere calibration system of an oxygen sensor.

Background

Disclosure of Invention

The main purpose of the present application is to provide an atmospheric calibration method, an atmospheric calibration device, a computer-readable storage medium, a processor, and an atmospheric calibration system for an oxygen sensor, so as to solve the problem that the atmospheric calibration method for an oxygen sensor in the prior art is time-consuming and labor-consuming.

According to an aspect of an embodiment of the present invention, there is provided an atmospheric calibration method for an oxygen sensor, the oxygen sensor being located on an exhaust pipe of a gas turbine unit, the atmospheric calibration method including: an acquisition step: under the condition of receiving a starting command of the gas turbine unit, acquiring state parameters of the engine recorded by the last key cycle, wherein the state parameters comprise a misfire rate and/or an explosion rate; a determination step: determining that the oxygen sensor needs to be calibrated in atmosphere when the state parameter is larger than a corresponding preset threshold value; the control steps are as follows: controlling the gas turbine set to execute a preset operation so that fresh air exists in a preset area around the oxygen sensor, and controlling the oxygen sensor to be heated to a preset temperature so that the oxygen sensor automatically detects to obtain detection data, wherein the preset area is an area in the exhaust pipe; the processing steps are as follows: and receiving the detection data, and determining a first correction coefficient according to the detection data.

Optionally, the gas turbine set further includes an air pipe, a gas pipe, a mixing pipe, an engine, a throttle valve, and a fuel valve, wherein one end of the air pipe is connected to an air inlet of the engine, one end of the gas pipe is connected to a gas inlet of the engine, one end of the mixing pipe is respectively connected to the other end of the air pipe and the other end of the gas pipe, the engine includes a starter, the throttle valve is disposed on the mixing pipe, and the fuel valve is disposed on the gas pipe, and the gas turbine set is controlled to perform a predetermined operation so that fresh air is present in a predetermined area around the oxygen sensor, including: controlling the fuel valve to close, cutting off ignition and opening the throttle valve; and controlling the starter to drive the engine to run for a first preset time, so that the gas in the exhaust pipe is the fresh air.

Optionally, after obtaining the first correction coefficient, the method further includes: determining whether the first correction coefficient is within a predetermined range; under the condition that the first correction coefficient is within the preset range, determining that the oxygen sensor is not distorted, storing the first correction coefficient, and controlling the gas turbine set to execute the starting command; and in the case that the first correction coefficient is not within the predetermined range, repeatedly executing the control step and the processing step to obtain a second correction coefficient.

Optionally, after obtaining the second correction coefficient, the method further includes: determining whether the second correction coefficient is within the predetermined range; under the condition that the second correction coefficient is within the preset range, determining that the oxygen sensor is not distorted, storing the second correction coefficient, and controlling the gas turbine set to execute the starting command; and under the condition that the second correction coefficient is not in the preset range, determining that the oxygen sensor is distorted and cannot be corrected, and sending prompt information for prompting to replace the oxygen sensor.

Optionally, after issuing the prompt message, and in a case where the oxygen sensor is not replaced, the method further includes: under the condition of receiving a forced starting command, controlling the gas unit to execute the starting command; controlling an operating parameter of the gas turbine unit to be less than a corresponding predetermined value until the oxygen sensor is replaced, wherein the operating parameter includes at least one of an operating power and an operating duration.

Optionally, the method further comprises: under the condition that the state parameter is smaller than or equal to the corresponding preset threshold value, acquiring the time interval between the current time and the last atmospheric calibration time of the oxygen sensor; executing the control step and the processing step in a case where the time interval is greater than or equal to a second predetermined time; and controlling the gas turbine set to execute the starting command under the condition that the time interval is smaller than the second preset time.

Optionally, the gas unit further includes an air pipeline, a gas pipeline, a mixing pipeline, a throttle valve and a fuel valve, wherein one end of the air pipeline is connected to an air inlet of the engine, one end of the gas pipeline is connected to a gas inlet of the engine, one end of the mixing pipeline is respectively connected to the other end of the air pipeline and the other end of the gas pipeline, the throttle valve is disposed on the mixing pipeline, and the fuel valve is disposed on the gas pipeline, and the control of the gas unit to execute the start command includes: controlling the fuel valve to be opened so as to introduce fuel gas into the gas turbine set; controlling the opening degree of the throttle valve to be a preset opening degree; and controlling the ignition to be ready.

According to another aspect of the embodiments of the present invention, there is also provided an atmospheric calibration apparatus for an oxygen sensor, where the oxygen sensor is located on an exhaust pipe of a gas turbine, the atmospheric calibration apparatus including: the acquiring unit is used for acquiring the state parameters of the engine recorded by the previous key cycle under the condition of receiving a starting command of the gas turbine unit, wherein the state parameters comprise a misfire rate and/or an explosion rate; the determining unit is used for determining that the oxygen sensor needs to be calibrated in the atmosphere when the state parameter is larger than a corresponding first preset threshold value; the first control unit is used for controlling the gas turbine unit to execute preset operation, so that fresh air exists in a preset area around the oxygen sensor, the oxygen sensor is controlled to be heated to a preset temperature, the oxygen sensor automatically detects the fresh air, and detection data are obtained, wherein the preset area is an area in the exhaust pipe; and the processing unit is used for receiving the detection data and determining a first correction coefficient according to the detection data.

According to still another aspect of the embodiments of the present invention, there is also provided a computer-readable storage medium including a stored program, wherein the program executes any one of the atmospheric calibration methods.

According to another aspect of the embodiments of the present invention, there is also provided a processor, configured to execute a program, where the program executes any one of the above atmospheric calibration methods.

According to another aspect of the embodiments of the present invention, there is also provided an atmosphere calibration system, including an atmosphere calibration apparatus, an oxygen sensor, and a gas turbine set, where the atmosphere calibration apparatus is configured to perform any one of the atmosphere calibration methods.

In the embodiment of the present invention, in the above atmospheric calibration method, first, under the condition that a start command of the gas turbine unit is received, a state parameter of the engine recorded in a previous key cycle is obtained, that is, a misfire rate and/or a knock rate of the engine recorded in a last operation process of the gas turbine unit is obtained, then, under the condition that the state parameter is greater than a corresponding predetermined threshold value, it is determined that the oxygen sensor needs to be subjected to atmospheric calibration, and finally, the gas turbine unit is controlled to execute a predetermined operation, so that a predetermined area around the oxygen sensor is fresh air, and the oxygen sensor is controlled to be heated to a predetermined temperature, so that the oxygen sensor automatically performs atmospheric calibration once, and a first correction coefficient is obtained, where the predetermined area is an area in an exhaust pipe. The method controls the oxygen sensor to be heated to a preset temperature by controlling the gas turbine set to execute preset operation so that the preset area around the oxygen sensor is fresh air, thereby leading the oxygen sensor to automatically detect to finish primary atmosphere calibration, not needing to disassemble the oxygen sensor to carry out atmosphere calibration, not needing to change the structure of a gas turbine set, reducing labor cost and time cost compared with the prior art that the oxygen sensor is disassembled to carry out atmosphere calibration, solving the problem that the atmosphere calibration method of the oxygen sensor in the prior art wastes time and labor, and the atmospheric calibration method is executed once every time the gas unit is started, so as to prevent the unit from firing or knocking caused by the measurement distortion of the oxygen sensor, the probability of unit fire and detonation caused by the distortion of the oxygen sensor is greatly reduced, and the use safety of the gas unit is improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:

FIG. 1 shows a flow diagram of a method for atmospheric calibration of an oxygen sensor according to an embodiment of the present application;

FIG. 2 shows a schematic diagram of an atmospheric calibration arrangement of an oxygen sensor according to an embodiment of the present application; and

FIG. 3 shows a flow chart of an atmospheric calibration method performed by the atmospheric calibration system according to an embodiment of the present application.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Also, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.

For convenience of description, some terms or expressions referred to in the embodiments of the present application are explained below:

a gas turbine unit: a generator set using natural gas, methane, gas and other gas sources as fuels;

an oxygen sensor: the device is arranged on the exhaust pipe and used for detecting the air-fuel ratio of the mixed gas of the gas turbine unit;

atmospheric calibration of the oxygen sensor: the oxygen sensor is placed in the atmosphere, and the operation of calibrating the oxygen sensor is performed.

As mentioned in the background of the invention, in order to solve the above problems, the atmospheric calibration method of the oxygen sensor in the prior art is time-consuming and labor-consuming, and in an exemplary embodiment of the present application, an atmospheric calibration method of the oxygen sensor, an atmospheric calibration apparatus, a computer-readable storage medium, a processor, and an atmospheric calibration system are provided.

According to an embodiment of the application, an atmospheric calibration method of an oxygen sensor is provided.

Fig. 1 is a flowchart of an atmospheric calibration method of an oxygen sensor according to an embodiment of the present application. As shown in fig. 1, the method comprises the steps of:

step S101, acquiring step: under the condition of receiving a starting command of the gas turbine unit, acquiring state parameters of the engine recorded by the previous key cycle, wherein the state parameters comprise a misfire rate and/or an explosion rate;

step S102, the determination step: determining that the oxygen sensor needs to be calibrated in atmosphere when the state parameter is larger than a corresponding preset threshold value;

step S103, control step: controlling the gas turbine set to execute a preset operation so that fresh air exists in a preset area around the oxygen sensor, and controlling the oxygen sensor to be heated to a preset temperature so that the oxygen sensor automatically detects to obtain detection data, wherein the preset area is an area in the exhaust pipe;

step S104, processing step: and receiving the detection data, and determining a first correction coefficient according to the detection data.

In the atmospheric calibration method, firstly, under the condition that a starting command of a gas turbine unit is received, state parameters of an engine recorded by the last key cycle are obtained, namely, the misfire rate and/or the detonation rate of the engine recorded in the last operation process of the gas turbine unit are obtained, then, under the condition that the state parameters are larger than corresponding preset threshold values, the oxygen sensor is determined to be required to be subjected to atmospheric calibration, then, the gas turbine unit is controlled to execute preset operation, fresh air is filled in a preset area around the oxygen sensor, the oxygen sensor is controlled to be heated to a preset temperature, so that the oxygen sensor automatically detects to obtain detection data, wherein the preset area is an area in an exhaust pipe, and finally, the detection data are received, and a first correction coefficient is determined according to the detection data. The method controls the oxygen sensor to be heated to a preset temperature by controlling the gas turbine set to execute preset operation so that the preset area around the oxygen sensor is fresh air, thereby leading the oxygen sensor to automatically detect to finish primary atmosphere calibration, not needing to disassemble the oxygen sensor to carry out atmosphere calibration, not needing to change the structure of a gas turbine set, reducing labor cost and time cost compared with the prior art that the oxygen sensor is disassembled to carry out atmosphere calibration, solving the problem that the atmosphere calibration method of the oxygen sensor in the prior art wastes time and labor, and the atmospheric calibration method is executed once every time the gas unit is started, so as to prevent the unit from firing or knocking caused by the measurement distortion of the oxygen sensor, the probability of unit fire and detonation caused by the distortion of the oxygen sensor is greatly reduced, and the use safety of the gas unit is improved.

It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.

In one embodiment of the present application, the gas turbine further includes an air line, a gas line, a mixing line, an engine, a throttle valve, and a fuel valve, wherein one end of the air line is connected to an air inlet of the engine, one end of the gas line is connected to a gas inlet of the engine, one end of the mixing line is connected to the other end of the air line and the other end of the gas line, respectively, the engine includes a starter, the throttle valve is disposed on the mixing line, and the fuel valve is disposed on the gas line, and the gas turbine is controlled to perform a predetermined operation so that fresh air is present in a predetermined region around the oxygen sensor, including: controlling the fuel valve to close, cutting off ignition and opening the throttle valve; and controlling the starter to drive the engine to run for a first preset time so that the gas in the exhaust pipe is the fresh air. Specifically, the fuel valve is controlled to be closed, so that fuel does not enter the engine any more, ignition is cut off, namely, power supply to an ignition coil is stopped, a throttle valve is opened, a connecting branch between a starter and the engine is communicated, the starter is controlled to drive the engine to run for a first preset time, outside air is sucked into the engine through running of the starter, residual waste gas of the engine is thoroughly removed, gas in an exhaust pipe is fresh air, and accuracy of measurement of the oxygen sensor after atmosphere calibration is guaranteed.

It should be noted that, a person skilled in the art may select a suitable first predetermined time according to an actual situation, so as to ensure that the gas in the exhaust pipe is fresh air after the starter drives the engine to operate for the first predetermined time, and avoid overheating of the starter.

In an embodiment of the present application, after obtaining the first correction coefficient, the method further includes: determining whether the first correction coefficient is within a predetermined range; determining that the oxygen sensor is not distorted when the first correction coefficient is within the predetermined range, storing the first correction coefficient, and controlling the gas turbine unit to execute the start command; and repeating the controlling step and the processing step to obtain a second correction coefficient when the first correction coefficient is not within the predetermined range. Specifically, when the first correction coefficient is within the predetermined range, it indicates that the oxygen sensor is not distorted, the gas turbine set is directly controlled to execute a start command, and when the first correction coefficient is not within the predetermined range, it indicates that the oxygen sensor is distorted, the control step and the processing step are repeatedly executed, that is, the atmospheric calibration is performed again.

In an embodiment of the application, after obtaining the second correction coefficient, the method further includes: determining whether the second correction coefficient is within the predetermined range; determining that the oxygen sensor is not distorted when the second correction coefficient is within the predetermined range, storing the second correction coefficient, and controlling the gas turbine unit to execute the start command; when the second correction coefficient is not within the predetermined range, the oxygen sensor is determined to be distorted and unable to be corrected, and a prompt message for prompting replacement of the oxygen sensor is issued. Specifically, under the condition that the second correction coefficient is within the preset range, the oxygen sensor is not distorted, the gas turbine set is directly controlled to execute a starting command, under the condition that the second correction coefficient is not within the preset range, the oxygen sensor is distorted and cannot be corrected through atmospheric calibration, prompt information is sent out to prompt a user to replace the oxygen sensor, and the risk that the engine is damaged due to the distortion of the oxygen sensor is further reduced.

In a specific embodiment of the present application, the predetermined range is 0.8 to 1.2, and the first correction coefficient or the second correction coefficient is within the predetermined range, which may improve the accuracy of the oxygen sensor measurement after the atmospheric calibration, and further preferably, the predetermined range is 0.95 to 1.05, which may further improve the accuracy of the oxygen sensor measurement after the atmospheric calibration.

In an embodiment of the present application, after sending the prompt message, and in a case that the oxygen sensor is not replaced, the method further includes: under the condition of receiving a forced starting command, controlling the gas unit to execute the starting command; and controlling the operation parameters of the gas turbine unit to be smaller than the corresponding preset values until the oxygen sensor is replaced, wherein the operation parameters comprise at least one of operation power and operation duration. Specifically, in practice, the oxygen sensor may not be replaced in time, and in the case of receiving a forced start command, the gas turbine unit is controlled to execute the start command, that is, the gas turbine unit is controlled to start normally, and the operation power and/or the operation duration of the gas turbine unit are controlled to be smaller than the corresponding predetermined value until the oxygen sensor is replaced, and safety emergency measures such as error reporting and torque limitation are performed on the gas turbine unit to reduce the fire rate and the detonation rate of the engine.

It should be noted that, according to actual conditions, a person skilled in the art can select the predetermined value of the operation power and the predetermined value of the operation time to reduce the misfire rate and the detonation rate of the engine.

In an embodiment of the present application, the method further includes: under the condition that the state parameter is smaller than or equal to the corresponding preset threshold value, acquiring the time interval between the current time and the last atmospheric calibration time of the oxygen sensor; executing the control step and the processing step when the time interval is greater than or equal to a second predetermined time; and controlling the gas turbine set to execute the starting command under the condition that the time interval is smaller than the second preset time. Specifically, when the state parameter is less than or equal to the corresponding predetermined threshold, that is, the gas turbine set is not abnormal in the previous key cycle process, a time interval between the current time and the last atmospheric calibration time of the oxygen sensor is obtained, when the time interval is greater than or equal to a second predetermined time, it is indicated that the oxygen sensor has a risk of distortion, a control step and a processing step are executed, that is, the oxygen sensor performs atmospheric calibration, when the time interval is less than the second predetermined time, it is indicated that the risk of distortion of the oxygen sensor is low, the gas turbine set is controlled to execute a start command, and the gas turbine set can be directly controlled to start.

In an embodiment of the present application, the gas turbine further includes an air pipe, a gas pipe, a mixing pipe, a throttle valve, and a fuel valve, wherein one end of the air pipe is connected to an air inlet of the engine, one end of the gas pipe is connected to a gas inlet of the engine, one end of the mixing pipe is connected to the other end of the air pipe and the other end of the gas pipe, respectively, the throttle valve is disposed on the mixing pipe, and the fuel valve is disposed on the gas pipe, and the control unit is configured to execute the start command, including: controlling the fuel valve to open so as to introduce fuel gas into the gas turbine set; controlling the opening degree of the throttle valve to be a preset opening degree; and controlling the ignition to be ready. Specifically, the fuel valve is controlled to be opened, namely, fuel gas can be introduced into the gas turbine unit, the opening degree of a throttle valve is controlled to be a preset opening degree, so that the fuel gas and air are mixed in a preset proportion, ignition is controlled to be ready, namely, power supply to an ignition coil is controlled, and the gas turbine unit is started.

The embodiment of the present application further provides an atmosphere calibration device for an oxygen sensor, and it should be noted that the atmosphere calibration device for an oxygen sensor in the embodiment of the present application may be used to execute the atmosphere calibration method for an oxygen sensor provided in the embodiment of the present application. The atmospheric calibration device of the oxygen sensor provided by the embodiment of the application is described below.

FIG. 2 is a schematic diagram of an atmospheric calibration arrangement for an oxygen sensor according to an embodiment of the present application. As shown in fig. 2, the apparatus includes:

an obtaining unit 10, configured to perform an obtaining step, that is, to obtain a state parameter of the engine recorded in a previous key cycle when a start command of the gas turbine is received, where the state parameter includes a misfire rate and/or an explosion rate;

a determining unit 20, configured to perform a determining step, namely, determine that the oxygen sensor needs to be calibrated by atmosphere if the state parameter is greater than a corresponding first predetermined threshold;

a first control unit 30, configured to perform a control step of controlling the gas turbine to perform a predetermined operation so that fresh air is present in a predetermined area around the oxygen sensor, and controlling the oxygen sensor to be heated to a predetermined temperature so that the oxygen sensor automatically detects the fresh air, and obtaining detection data, where the predetermined area is an area in the exhaust pipe;

the processing unit 40 is configured to perform a processing step, i.e. to receive the detection data and determine a first correction factor according to the detection data.

In the atmospheric calibration device, the obtaining unit obtains the state parameters of the engine recorded by the previous key cycle when receiving a starting command of the gas turbine, that is, obtains the misfire rate and/or the detonation rate of the engine recorded in the last operation process of the gas turbine, the determining unit determines that the oxygen sensor needs to perform atmospheric calibration when the state parameters are greater than the corresponding predetermined threshold, the first control unit controls the gas turbine to execute predetermined operation, so that fresh air is present in a predetermined area around the oxygen sensor, the oxygen sensor is controlled to be heated to a predetermined temperature, so that the oxygen sensor automatically detects to obtain detection data, wherein the predetermined area is an area in an exhaust pipe, and the processing unit receives the detection data and determines a first correction coefficient according to the detection data. The device controls the oxygen sensor to be heated to a preset temperature by controlling the gas turbine set to execute preset operation so that the preset area around the oxygen sensor is fresh air, thereby leading the oxygen sensor to automatically detect to finish primary atmosphere calibration, not needing to disassemble the oxygen sensor to carry out atmosphere calibration, not needing to change the structure of a gas turbine set, reducing labor cost and time cost compared with the prior art that the oxygen sensor is disassembled to carry out atmosphere calibration, solving the problem that the atmosphere calibration method of the oxygen sensor in the prior art wastes time and labor, and the atmospheric calibration method is executed once every time the gas unit is started, so as to prevent the unit from firing or knocking caused by the measurement distortion of the oxygen sensor, the probability of unit fire and detonation caused by the distortion of the oxygen sensor is greatly reduced, and the use safety of the gas unit is improved.

It should be noted that the atmospheric calibration device of the oxygen sensor may be an electronic control unit ECU of the plant, and of course, the atmospheric calibration device may also be another controller, and a person skilled in the art may select an appropriate atmospheric calibration device according to actual situations.

In an embodiment of the present application, the gas turbine set further includes an air pipeline, a gas pipeline, a mixing pipeline, an engine, a throttle valve, and a fuel valve, wherein one end of the air pipeline is connected to an air inlet of the engine, one end of the gas pipeline is connected to a gas inlet of the engine, one end of the mixing pipeline is respectively connected to the other end of the air pipeline and the other end of the gas pipeline, the engine includes a starter, the throttle valve is disposed on the mixing pipeline, the fuel valve is disposed on the gas pipeline, and the first control unit includes a first control module and a second control module, wherein the first control module is configured to control the fuel valve to close, ignite and turn off, and turn on the throttle valve; the second control module is used for controlling the starter to drive the engine to operate for a first preset time, so that the gas in the exhaust pipe is the fresh air. Specifically, the fuel valve is controlled to be closed, so that fuel does not enter the engine any more, ignition is cut off, namely, power supply to an ignition coil is stopped, a throttle valve is opened, a connecting branch between a starter and the engine is communicated, the starter is controlled to drive the engine to run for a first preset time, outside air is sucked into the engine through running of the starter, residual waste gas of the engine is thoroughly removed, gas in an exhaust pipe is fresh air, and accuracy of measurement of the oxygen sensor after atmosphere calibration is guaranteed.

It should be noted that, a person skilled in the art may select a suitable first predetermined time according to an actual situation, so as to ensure that the gas in the exhaust pipe is fresh air after the starter drives the engine to operate for the first predetermined time, and avoid overheating of the starter.

In an embodiment of the present application, the apparatus further includes a second control unit, where the second control unit includes a first determining module, a second determining module, and a third control module, where the first determining module is configured to determine whether the first correction coefficient is within a predetermined range after obtaining the first correction coefficient; the second determining module is configured to determine that the oxygen sensor is not distorted when the first correction coefficient is within the predetermined range, store the first correction coefficient, and control the gas turbine unit to execute the start command; the third control module is configured to repeat the control step and the processing step to obtain a second correction coefficient when the first correction coefficient is not within the predetermined range. Specifically, when the first correction coefficient is within the predetermined range, it indicates that the oxygen sensor is not distorted, the gas turbine set is directly controlled to execute a start command, and when the first correction coefficient is not within the predetermined range, it indicates that the oxygen sensor is distorted, the control step and the processing step are repeatedly executed, that is, the atmospheric calibration is performed again.

In an embodiment of the present application, the apparatus further includes a third control unit, where the third control unit includes a third determining module, a fourth determining module, and a fourth control module, where the third determining module is configured to determine whether the second correction coefficient is within the predetermined range after obtaining the second correction coefficient; the fourth determining module is configured to determine that the oxygen sensor is not distorted when the second correction coefficient is within the predetermined range, store the second correction coefficient, and control the gas turbine unit to execute the start command; the fourth control module is configured to determine that the oxygen sensor is distorted and cannot be corrected when the second correction coefficient is not within the predetermined range, and send a prompt message for prompting replacement of the oxygen sensor. Specifically, under the condition that the second correction coefficient is within the preset range, the oxygen sensor is not distorted, the gas turbine set is directly controlled to execute a starting command, under the condition that the second correction coefficient is not within the preset range, the oxygen sensor is distorted and cannot be corrected through atmospheric calibration, prompt information is sent out to prompt a user to replace the oxygen sensor, and the risk that the engine is damaged due to the distortion of the oxygen sensor is further reduced.

In a specific embodiment of the present application, the predetermined range is 0.8 to 1.2, and the first correction coefficient or the second correction coefficient is within the predetermined range, which may improve the accuracy of the oxygen sensor measurement after the atmospheric calibration, and further preferably, the predetermined range is 0.95 to 1.05, which may further improve the accuracy of the oxygen sensor measurement after the atmospheric calibration.

In an embodiment of the present application, the apparatus further includes a fourth control unit, where the fourth control unit includes a fifth control module and a sixth control module, where the fifth control module is configured to control the gas turbine unit to execute the start command after sending the prompt message and when the oxygen sensor is not replaced and when receiving the forced start command; the sixth control module is configured to control an operating parameter of the gas turbine unit to be smaller than a corresponding predetermined value until the oxygen sensor is replaced, where the operating parameter includes at least one of an operating power and an operating duration. Specifically, in practice, the oxygen sensor may not be replaced in time, and in the case of receiving a forced start command, the gas turbine unit is controlled to execute the start command, that is, the gas turbine unit is controlled to start normally, and the operation power and/or the operation duration of the gas turbine unit are controlled to be smaller than the corresponding predetermined value until the oxygen sensor is replaced, and safety emergency measures such as error reporting and torque limitation are performed on the gas turbine unit to reduce the fire rate and the detonation rate of the engine.

It should be noted that, according to actual conditions, a person skilled in the art can select the predetermined value of the operation power and the predetermined value of the operation time to reduce the misfire rate and the detonation rate of the engine.

In an embodiment of the present application, the apparatus further includes a fifth control unit, where the fifth control unit includes an obtaining module, a seventh control module, and an eighth control module, where the obtaining module is configured to obtain a time interval between a current time and a time of last atmospheric calibration of the oxygen sensor when the state parameter is less than or equal to the corresponding predetermined threshold; the seventh control module is configured to execute the control step and the processing step when the time interval is greater than or equal to a second predetermined time; the eighth control module is configured to control the gas turbine unit to execute the start command when the time interval is smaller than the second predetermined time. Specifically, when the state parameter is less than or equal to the corresponding predetermined threshold, that is, the gas turbine set is not abnormal in the previous key cycle process, a time interval between the current time and the last atmospheric calibration time of the oxygen sensor is obtained, when the time interval is greater than or equal to a second predetermined time, it is indicated that the oxygen sensor has a risk of distortion, a control step and a processing step are executed, that is, the oxygen sensor performs atmospheric calibration, when the time interval is less than the second predetermined time, it is indicated that the risk of distortion of the oxygen sensor is low, the gas turbine set is controlled to execute a start command, and the gas turbine set can be directly controlled to start.

In an embodiment of the present application, the gas turbine further includes an air pipe, a gas pipe, a mixing pipe, a throttle valve, and a fuel valve, wherein one end of the air pipe is connected to an air inlet of the engine, one end of the gas pipe is connected to a gas inlet of the engine, one end of the mixing pipe is connected to the other end of the air pipe and the other end of the gas pipe, respectively, the throttle valve is disposed on the mixing pipe, the fuel valve is disposed on the gas pipe, and the eighth control module includes a first control sub-module, a second control sub-module, and a third control sub-module, wherein the first control sub-module is configured to control the fuel valve to open to introduce gas into the gas turbine; the second control submodule is used for controlling the opening of the throttle valve to be a preset opening; the third control sub-module is used for controlling ignition readiness. Specifically, the fuel valve is controlled to be opened, namely, fuel gas can be introduced into the gas turbine unit, the opening degree of a throttle valve is controlled to be a preset opening degree, so that the fuel gas and air are mixed in a preset proportion, ignition is controlled to be ready, namely, power supply to an ignition coil is controlled, and the gas turbine unit is started.

The embodiment of the application also provides an atmosphere calibration system which comprises an atmosphere calibration device, an oxygen sensor and a gas turbine unit, wherein the atmosphere calibration device is used for executing any one of the atmosphere calibration methods.

The atmospheric calibration system comprises an atmospheric calibration device, wherein an acquisition unit acquires state parameters of an engine recorded by the previous key cycle under the condition that a starting command of a gas turbine unit is received, namely the misfire rate and/or the detonation rate of the engine recorded in the last operation process of the gas turbine unit is acquired, a determination unit determines that an oxygen sensor needs to be subjected to atmospheric calibration under the condition that the state parameters are larger than corresponding preset threshold values, a first control unit controls the gas turbine unit to execute preset operation, so that fresh air exists in a preset area around the oxygen sensor, the oxygen sensor is controlled to be heated to a preset temperature, the oxygen sensor is automatically detected, detection data are obtained, the preset area is an area in an exhaust pipe, and a processing unit receives the detection data and determines a first correction coefficient according to the detection data. The device controls the oxygen sensor to be heated to a preset temperature by controlling the gas turbine set to execute preset operation so that the preset area around the oxygen sensor is fresh air, thereby leading the oxygen sensor to automatically detect to finish primary atmosphere calibration, not needing to disassemble the oxygen sensor to carry out atmosphere calibration, not needing to change the structure of a gas turbine set, reducing labor cost and time cost compared with the prior art that the oxygen sensor is disassembled to carry out atmosphere calibration, solving the problem that the atmosphere calibration method of the oxygen sensor in the prior art wastes time and labor, and the atmospheric calibration method is executed once every time the gas unit is started, so as to prevent the unit from firing or knocking caused by the measurement distortion of the oxygen sensor, the probability of unit fire and detonation caused by the distortion of the oxygen sensor is greatly reduced, and the use safety of the gas unit is improved.

It should be noted that the atmospheric calibration device of the oxygen sensor may be a vehicle-mounted computer ECU, and of course, the atmospheric calibration device may also be another controller, and a person skilled in the art may select a suitable atmospheric calibration device according to actual conditions.

In order to make the technical solutions of the present application more clearly understood by those skilled in the art, the technical solutions of the present application will be described below with reference to specific embodiments.