阅读说明：本技术 燃烧状态检测的方法、装置、燃气装置及存储介质 (Combustion state detection method and device, gas device and storage medium ) 是由 邹雄宇 于 2021-06-15 设计创作，主要内容包括：本发明属于燃气炉领域,尤其涉及一种燃烧状态检测的方法、装置、燃烧装置及存储介质。方法包括输入按周期T变化的电压信号到检火针；在预设时间段内,实时获取检火针测量得到的第一离子火焰电流,得到预设时间段内的第一离子火焰电流信息；提取第一离子火焰电流信息的第一响应特征；将第一响应特征、电压信号与预设的基准特征比较,得到预设时间段内的燃烧状态。装置、燃烧装置及存储介质应用该方法。通过监测多组第一离子火焰电流数据,能够减少由于外界因素导致火焰高度变化带来的扰动。同时,由于输入的电压信号为周期变化的,因此通过在基准特征中找到与响应特征变化规律最为近似的特征,从而获取更高精度的燃烧状态。(The invention belongs to the field of gas furnaces, and particularly relates to a method and a device for detecting a combustion state, a combustion device and a storage medium. The method comprises inputting a voltage signal varying according to a period T to a fire detection needle; in a preset time period, acquiring first ion flame current measured by a fire detection needle in real time to obtain first ion flame current information in the preset time period; extracting a first response characteristic of the first ion flame current information; and comparing the first response characteristic and the voltage signal with a preset reference characteristic to obtain the combustion state in a preset time period. The device, the combustion device and the storage medium apply the method. By monitoring multiple groups of first ion flame current data, disturbance caused by flame height change due to external factors can be reduced. Meanwhile, because the input voltage signal is periodically changed, the combustion state with higher precision is obtained by finding the characteristic which is most similar to the change rule of the response characteristic in the reference characteristic.)

1. A combustion state detection method is applied to a gas device, the gas device comprises a fire detection needle, and the method comprises the following steps:

inputting a voltage signal which changes according to a period T to the fire detection needle;

within a preset time period, acquiring first ion flame current measured by the fire detection needle under the voltage signal with the period T changing in real time to obtain first ion flame current information within the preset time period;

extracting a first response characteristic of the first ion flame current information;

and obtaining the combustion state of the gas device according to the first response characteristic, the voltage signal and a preset reference characteristic.

2. The combustion state detection method according to claim 1,

the first response characteristic of the first ion flame current information extraction includes at least one of:

extracting time domain characteristics of the first ion flame current information;

and extracting frequency domain characteristics of the first ion flame current information.

3. The combustion state detection method according to claim 1,

the voltage signal is one of a sine wave signal, a square wave signal and a step signal.

4. The combustion state detection method according to any one of claims 1 to 3,

the voltage signals are provided with a plurality of groups, and the frequency of each group of voltage signals is different.

5. The combustion state detection method according to any one of claims 1 to 3,

the voltage signals are provided with a plurality of groups, and the amplitude of each group of voltage signals is different.

6. The method of combustion state detection according to claim 1, wherein the preset reference characteristic is obtained by:

introducing reference fuel gas with corresponding volume according to the combustion state of a sample to be detected;

inputting a voltage signal which changes according to a period T to the fire detection needle;

acquiring second ion flame current measured by the fire detection needle in real time within a preset time period to obtain second ion flame current information within the preset time period;

extracting a second response characteristic of the second ion flame current information;

and obtaining a reference characteristic according to the sample combustion state, the second response characteristic and the corresponding voltage signal.

7. An apparatus for combustion state detection, comprising:

the flame detection needle is used for detecting a first ion flame current of a combustion flame;

the controlled signal generator is used for inputting a voltage signal which changes according to the period T to the fire detection needle;

the control module comprises an information acquisition processing module and a signal triggering module, the signal triggering module is electrically connected with the controlled signal generator, and the signal triggering module is used for controlling the type of the voltage signal output by the controlled signal generator; the signal acquisition and processing module acquires first ion flame current information within a preset time period, extracts first response characteristics of the first ion flame current information, compares the first response characteristics and the voltage signal with preset reference characteristics, and outputs a combustion state.

8. A gas device, characterized in that the gas device acquires a combustion state by applying the method for detecting a combustion state according to any one of claims 1 to 6.

9. A storage medium comprising stored computer-executable instructions for performing the method of combustion state detection of any one of claims 1-6.

Technical Field

The invention belongs to the field of gas furnaces, and particularly relates to a method and a device for detecting a combustion state, a gas device and a storage medium.

Background

Gas-fired devices, such as gas water heaters and gas-fired water heaters, can employ ionic flame current to monitor combustion state (e.g., air coefficient) information. But when the combustion device works at different loads, the flame height will also change, but the height of the fire detection needle is fixed and not adjustable, when the flame is higher, the fire detection needle detects the state that the flame is inclined to the bottom, and when the flame is lower, the fire detection needle detects the state that the flame is inclined to the top. And under same combustion state, the combustion temperature and ion concentration are different because of the difference of burning intensity at the top and the bottom of flame to make flame ion current can't accurate feedback corresponding combustion temperature and ion concentration, lead to directly obtaining combustion state precision not enough through ion current detection.

Disclosure of Invention

The invention provides a method and a device for detecting a combustion state, a gas device and a storage medium, which can solve the problem of insufficient combustion state precision obtained by directly detecting an ion current.

In a first aspect, the present invention provides a method for detecting a combustion state, applied to a gas device, where the gas device includes a fire detection needle, and the method includes:

inputting a voltage signal which changes according to a period T to the fire detection needle;

within a preset time period, acquiring first ion flame current measured by the fire detection needle under the voltage signal with the period of T change in real time to obtain first ion flame current information within the preset time period;

extracting a first response characteristic of the first ion flame current information;

and obtaining the combustion state of the combustion device according to the first response characteristic, the voltage signal and a preset reference characteristic.

In a second aspect, the invention further provides a gas device, and the gas device acquires the combustion state by applying the method for detecting the combustion state of the first aspect.

In a third aspect, the present invention also provides a device for detecting a combustion state, comprising:

the flame detection needle is used for detecting a first ion flame current of a combustion flame;

the controlled signal generator is used for inputting a voltage signal to the fire detection needle;

the control module comprises an information acquisition processing module and a signal triggering module, the signal triggering module is electrically connected with the controlled signal generator, and the signal triggering module is used for controlling the type of the voltage signal output by the controlled signal generator; the signal acquisition and processing module acquires first ion flame current information within a preset time period, extracts a first response characteristic of the first ion flame current information, compares the first response characteristic and the voltage signal with a preset reference characteristic, and outputs a combustion state.

In a fourth aspect, the present invention also provides a storage medium comprising computer executable instructions stored thereon for performing the method of detecting an air factor of a gas furnace of the first aspect.

According to the above embodiments of the present invention, the present application has the following beneficial effects: by detecting the current change state of the first ion flame within a period of time, the disturbance caused by the change of the flame height due to external factors under the same combustion state is reduced. Meanwhile, the input voltage signal is periodically changed, so that the current of the first ion flame is regularly changed under the normal condition, and the characteristic which is most similar to the change rule of the response characteristic is found in the reference characteristic, so that the combustion state with higher precision is obtained.

Drawings

FIG. 1 is a schematic flow diagram of combustion state acquisition for a method of combustion state detection according to an embodiment of the present invention;

FIG. 2 is a schematic flow diagram of baseline signature acquisition for a method of combustion state detection in accordance with an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a combustion state detection device according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It should be understood that unless otherwise expressly limited, terms such as set forth, mounted, connected, etc., are to be construed broadly, and those skilled in the art can reasonably determine the specific meaning of the terms in the present application in view of the detailed disclosure of the technical solution. If any, the first and second are described only for the purpose of distinguishing technical features, and are not to be understood as indicating or indicating relative importance in time or implicitly indicating the number of indicated counting features or implicitly indicating the precedence of the indicated technical features.

It should be noted that when the combustion device works under different loads, the height of the flame will also change, but the height of the flame detection needle is fixed and not adjustable, when the flame is higher, the flame detection needle detects the state that the flame is inclined to the bottom, and when the flame is lower, the flame detection needle detects the state that the flame is inclined to the top. And under same combustion state, the combustion temperature and ion concentration are different because of the difference of burning intensity at the top and the bottom of flame to make flame ion current can't accurate feedback corresponding combustion temperature and ion concentration, lead to directly obtaining combustion state precision not enough through ion current detection.

Therefore, the present invention provides a method and an apparatus for detecting a combustion state, a gas apparatus, and a storage medium to obtain a combustion state with higher accuracy.

As shown in fig. 1, a method for detecting a combustion state according to the present invention includes:

and step S100, inputting a voltage signal which changes according to a period T to the fire detection needle.

It should be noted that the period T may be set as needed. The input of the voltage signal can be input in advance so as to facilitate real-time detection, and the voltage signal can be input again when the detection is actually carried out. The voltage signal can be input by setting a controlled signal generator (such as a voltage regulating module). The voltage signal having the period T is a voltage signal varying with the period T.

Step S200, in a preset time period, acquiring first ion flame current measured by the fire detection needle under the voltage signal with the period T change in real time, and acquiring first ion flame current information in the preset time period.

It should be noted that, in the preset time period, it is necessary to ensure that the combustion state is unchanged, and the combustion state value can be maintained by controlling the input air amount and the gas amount to be kept unchanged. The voltage signal is a voltage with a period of T change, so the first ion flame current information is a set of the first ion flame currents under a plurality of groups of collected different voltage values.

And step S300, extracting a first response characteristic of the first ion flame current information.

It should be noted that the first response characteristic is indicative of a change in the first ion flame current information in response to the voltage signal.

And S400, obtaining the combustion state of the combustion device according to the first response characteristic, the voltage signal and the preset reference characteristic.

It should be noted that the combustion state may be an air ratio or other combustion data measurable by an ion flame current during the combustion process. The reference characteristic is reference data obtained by measuring preset reference fuel gas (such as methane).

It should be noted that the reference feature may be a learning model, and a corresponding learning model is established by obtaining training data (the sample combustion state, the second response feature, and the corresponding voltage signal). In this case, the first response characteristic and the voltage signal corresponding to the first response characteristic may be input to the learning model to obtain the combustion state.

In other embodiments, training data under different conditions are obtained to obtain corresponding models; and designing a proper FIR or IIR filtering algorithm according to the model information. Therefore, the first response characteristic can be filtered to obtain the combustion state.

In other embodiments, the baseline characteristic may be a plurality of sets of reference data. The combustion state is obtained by comparison with the reference data.

Therefore, disturbance caused by flame height change due to external factors under the same combustion state is reduced by detecting the change state of the first ion flame current within a period of time. Meanwhile, the input voltage signal is periodically changed, so that the current of the first ion flame is regularly changed under the normal condition, and the characteristic which is most similar to the change rule of the response characteristic is found in the reference characteristic, so that the combustion state with higher precision is obtained.

It is understood that step S300 includes at least one of the following:

step 1, extracting time domain characteristics of first ion flame current information.

And 2, extracting frequency domain characteristics of the first ion flame current information.

It should be noted that the extraction method of the time domain feature and the frequency domain feature is the existing counting, and therefore, the present invention is not described in detail.

It is understood that the voltage signal is one of a sine wave signal, a square wave signal, and a staircase signal.

It is understood that the voltage signals are provided in a plurality of sets, each set having a different frequency.

It should be noted that, when a plurality of groups of voltage signals with different frequencies are set, voltage signals with different periods T may be respectively input in a plurality of preset time periods, and at this time, a plurality of different voltage values corresponding to the first ion flame currents under the voltage signals with each different period T may be collected, so as to obtain a plurality of first ion flame current information, so that first response characteristics corresponding to the plurality of first ion flame current information may be extracted and compared with the reference characteristics. At this time, by setting a plurality of groups, more variation information of the first ion flame current can be obtained, so that more data can be compared with the reference characteristics, and a more accurate combustion state can be obtained.

It is understood that the voltage signals are provided in a plurality of sets, each set having a different amplitude.

It should be noted that, when a plurality of groups of voltage signals with different amplitudes are provided, the first ion flame current information under the voltage signals with different amplitudes and a period T may be detected in a plurality of preset time periods. At this time, first response characteristics corresponding to the plurality of pieces of first ion flame current information can be extracted and compared with the reference characteristics.

It should be noted that the ion current is disturbed differently in amplitude and frequency. Therefore, the variation relation of the first ion flame current can be detected from multiple aspects, thereby obtaining a more accurate combustion state.

It is understood that, as shown in fig. 2, before step S100, the obtaining of the reference feature preset in the method of the present invention includes:

and step S510, introducing reference fuel gas with corresponding volume according to the combustion state of the sample to be detected.

And step S520, inputting a voltage signal which changes according to the period T to the fire detection needle.

It should be noted that the voltage signal in the reference feature is identical to the socially significant voltage signal in the response feature, and thus a highly accurate combustion state can be obtained by comparing the reference features.

Step S530, in a preset time period, obtaining a second ion flame current measured by the fire detection needle in real time, and obtaining second ion flame current information in the preset time period.

It should be noted that, in the reference feature extraction, the collection period of the second ion flame current (i.e., the preset time period of step S530) should be equal to or greater than the collection period of the first ion flame current (i.e., the preset time period of step S200).

And S540, extracting a second response characteristic of the second ion flame current information.

It should be noted that the second response characteristic should cover the information of the first response characteristic. That is, if the first response characteristic corresponds to the time domain characteristic, the second response characteristic has at least the time domain characteristic.

And S550, obtaining a reference characteristic according to the sample combustion state, the second response characteristic and the corresponding voltage signal.

It can be understood that, as shown in fig. 3, the present invention also provides a combustion state detecting apparatus, comprising:

a fire detection needle 100 for detecting a first ion flame current of a combustion flame;

a controlled signal generator 200 for inputting a voltage signal to the fire detection needle;

the control module 300, the control module 300 includes an information acquisition processing module 310 and a signal trigger module 320, the signal trigger module 320 is electrically connected with the controlled signal generator 200, and the signal trigger module 320 is used for controlling the type of the voltage signal output by the controlled signal generator 200; the signal collecting and processing module 310 collects first ion flame current information within a preset time period, extracts a first response characteristic of the first ion flame current information, compares the first response characteristic and the voltage signal with a preset reference characteristic, and outputs a combustion state.

It is understood that the present application also provides a gas combustion apparatus that detects a combustion state in real time using the method of combustion state detection of the first aspect.

It will be appreciated that the present application also provides a storage medium comprising stored computer executable instructions for a method of detecting an air factor of a gas furnace according to the first aspect of the present application.

It is noted that the term storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.