CN-121558644-B - Multi-sensor data calibration processing method, system and medium

CN121558644BCN 121558644 BCN121558644 BCN 121558644BCN-121558644-B

Abstract

The invention relates to the technical field of sensor data calibration, in particular to a multi-sensor data calibration processing method, a multi-sensor data calibration processing system and a multi-sensor data calibration processing medium, wherein the multi-sensor data calibration processing method comprises the steps of acquiring at least two sensor data and standard second harmonic signal data; the method comprises the steps of obtaining second harmonic signal data corresponding to a laser intensity signal from sensor data, determining harmonic abnormal characteristics, a first difference rate and a second difference rate according to the second harmonic signal data and standard second harmonic signal data, determining calibration error parameters according to the harmonic abnormal characteristics, the first difference rate and the second difference rate, and carrying out calibration processing on initially detected target gas concentration based on the calibration error parameters to obtain calibrated target gas concentration. According to the method and the device, the initial detected target gas concentration can be corrected according to the calibration error parameter, the calibration accuracy is improved, and the deviation between the gas concentration detected by the sensor and the actual gas concentration is further reduced.

Inventors

LIU JILONG
LI JIE
DU XUJING
LIU HONG
WANG ZIJIAN
ZHANG YUNSHENG
SHANG ERLI

Assignees

鞍山天汇科技有限公司

Dates

Publication Date: 20260508
Application Date: 20251229

Claims (10)

1. A method of multi-sensor data calibration processing, the method comprising: The method comprises the steps of acquiring at least two sensor data and standard second harmonic signal data, wherein the sensor data comprises a laser intensity signal, the laser intensity signal is used for representing the laser energy intensity which is not absorbed by target gas, and the standard second harmonic signal data is used for representing ideal second harmonic signal characteristics of target gas with specific concentration at standard temperature; acquiring second harmonic signal data corresponding to the laser intensity signal from the sensor data; Determining harmonic abnormal characteristics, a first difference rate and a second difference rate according to the second harmonic signal data and the standard second harmonic signal data, wherein the harmonic abnormal characteristics are used for representing the degree of deviation of the second harmonic signal from the waveform of the standard second harmonic signal, the first difference rate is used for representing the degree of difference of the second harmonic signal and the standard second harmonic signal in the second harmonic peak integration area, and the second difference rate is used for representing the degree of difference of the second harmonic signal and the standard second harmonic signal in the second harmonic peak amplitude; determining a calibration error parameter according to the harmonic abnormal characteristics, the first difference rate and the second difference rate; and based on the calibration error parameter, performing calibration processing on the initially detected target gas concentration to obtain the calibrated target gas concentration.
2. The method for calibrating and processing multi-sensor data according to claim 1, wherein the step of obtaining second harmonic signal data corresponding to the laser intensity signal from the sensor data comprises: The laser intensity signal is modulated and demodulated to obtain second harmonic signal data corresponding to the laser intensity signal, wherein the second harmonic signal data comprise a first half-width of a second harmonic peak, a first integral area and a first amplitude, the first half-width is half-width corresponding to the peak of the second harmonic peak, the first integral area is an area surrounded by the peak of the second harmonic peak and a transverse coordinate, and the first amplitude is the amplitude corresponding to the peak of the second harmonic peak.
3. The method of claim 2, wherein the standard second harmonic signal data comprises a second half-width of a standard second harmonic peak, a second integration area, and a second amplitude, wherein determining harmonic anomaly characteristics from the second harmonic signal data and the standard second harmonic signal data, the first difference rate, and the second difference rate comprises: Determining an initial difference rate according to the first half-height width and the second half-height width; Determining harmonic anomaly characteristics based on a waveform consistency between the second harmonic signal and the standard second harmonic signal, and the initial difference rate, wherein the waveform consistency is used for representing the similarity between the second harmonic signal and the standard second harmonic signal; Determining a first difference rate according to the first integral area and the second integral area; And determining a second difference rate according to the first amplitude and the second amplitude.
4. The method of claim 3, wherein said determining an initial rate of difference based on said first half-width and said second half-width comprises: determining a half-width change rate according to the first half-width and the second half-width; An initial rate of difference is determined based on the half-width rate of change.
5. The method of claim 1, wherein the sensor data further comprises temperature data, wherein determining the calibration error parameter based on the harmonic anomaly characteristic, the first difference rate, and the second difference rate comprises: determining a temperature direction indicating factor according to the difference value between the temperature data and the standard temperature; and weighting the harmonic abnormal characteristics through the temperature direction indicating factors, and obtaining calibration error parameters through the first difference rate and the second difference rate.
6. The multi-sensor data calibration processing method of claim 3, wherein said determining a harmonic anomaly characteristic based on a degree of waveform coincidence between the second harmonic signal and the standard second harmonic signal, and the initial rate of difference, comprises: Determining a first abnormal characteristic according to the abnormal characteristic parameter and the waveform consistency; a harmonic anomaly characteristic is determined based on the first anomaly characteristic and the initial difference rate.
7. The method for calibrating and processing multi-sensor data according to claim 1, wherein the step of calibrating the initially detected target gas concentration based on the calibration error parameter to obtain the calibrated target gas concentration comprises the steps of: Weighting the calibration error parameters by adjusting the proportion coefficient to obtain a correction coefficient; And weighting the initially detected target gas concentration based on the correction coefficient to obtain the calibrated target gas concentration.
8. A multi-sensor data calibration processing system, the system comprising: The system comprises an acquisition module, a reference temperature acquisition module and a reference temperature acquisition module, wherein the acquisition module is used for acquiring at least two sensor data and reference second harmonic signal data, the sensor data comprises a laser intensity signal, the laser intensity signal is used for representing the laser energy intensity which is not absorbed by target gas, the reference second harmonic signal data is used for representing the ideal second harmonic signal characteristic of the target gas with specific concentration at the reference temperature, and the second harmonic signal data corresponding to the laser intensity signal is acquired from the sensor data; The system comprises a determining module, a harmonic anomaly characteristic, a first difference rate and a second difference rate, wherein the harmonic anomaly characteristic is used for representing the degree of deviation of a second harmonic signal from the waveform of a standard second harmonic signal, the first difference rate is used for representing the degree of difference of the second harmonic signal and the standard second harmonic signal on the integral area of a second harmonic peak, the second difference rate is used for representing the degree of difference of the second harmonic signal and the standard second harmonic signal on the amplitude of the second harmonic peak, and the first difference rate and the second difference rate are used for determining a calibration error parameter according to the harmonic anomaly characteristic; and the obtaining module is used for carrying out calibration processing on the initially detected target gas concentration based on the calibration error parameter to obtain the calibrated target gas concentration.
9. The multi-sensor data calibration processing system of claim 8, wherein the acquisition module comprises: The laser intensity signal acquisition sub-module is used for modulating and demodulating the laser intensity signal to acquire second harmonic signal data corresponding to the laser intensity signal, wherein the second harmonic signal data comprise a first half-width of a second harmonic peak, a first integral area and a first amplitude, the first half-width is half-width corresponding to the peak of the second harmonic peak, the first integral area is an area surrounded by the peak of the second harmonic peak and an abscissa, and the first amplitude is the amplitude corresponding to the peak of the second harmonic peak.
10. A readable storage medium, characterized in that instructions in the readable storage medium, when executed by a processor of an electronic device, enable the processor to perform the multi-sensor data calibration processing method of any one of claims 1 to 7.

Description

Multi-sensor data calibration processing method, system and medium Technical Field The invention relates to the technical field of sensor data calibration, in particular to a multi-sensor data calibration processing method, a multi-sensor data calibration processing system and a multi-sensor data calibration medium. Background A large amount of combustible gas such as methane, carbon monoxide and the like is usually generated in production and life, and the concentration of the combustible gas in the air can be accurately detected by installing a plurality of sensors, so that people can find out gas leakage early, and potential fire and explosion hazards can be effectively prevented. The conventional sensors include a catalytic sensor, an electrochemical sensor, a laser sensor and the like, wherein the laser sensor is widely applied to the concentration detection of combustible gas due to the characteristics of non-contact and quick response. At present, the combustible gas of methane and carbon monoxide type is usually generated in a household kitchen, and the laser sensor is combined with a tunable semiconductor laser absorption spectrum technology to detect the concentration of the combustible gas in the air through the characteristic absorption peak (second harmonic amplitude) of the laser scanning target gas with a specific wavelength, however, the temperature in the kitchen is usually unstable and changes, the absorption spectrum characteristic is changed, and the detected concentration of the combustible gas is deviated from the actual concentration of the combustible gas. That is, the gas concentration detected by the laser sensor provided in the prior art is affected by temperature, resulting in lower accuracy. Disclosure of Invention In order to solve the technical problem that the gas concentration detected by the laser sensor in the prior art deviates from the true gas concentration, the invention aims to provide a multi-sensor data calibration processing method, a system and a medium, wherein the adopted technical scheme is as follows: in a first aspect, an embodiment of the present invention provides a method for calibrating and processing multi-sensor data, the method including: The method comprises the steps of acquiring at least two sensor data and standard second harmonic signal data, wherein the sensor data comprises a laser intensity signal, the laser intensity signal is used for representing the laser energy intensity which is not absorbed by target gas, and the standard second harmonic signal data is used for representing ideal second harmonic signal characteristics of target gas with specific concentration at standard temperature; acquiring second harmonic signal data corresponding to the laser intensity signal from the sensor data; Determining harmonic abnormal characteristics, a first difference rate and a second difference rate according to the second harmonic signal data and the standard second harmonic signal data, wherein the harmonic abnormal characteristics are used for representing the degree of deviation of the second harmonic signal from the waveform of the standard second harmonic signal, the first difference rate is used for representing the degree of difference of the second harmonic signal and the standard second harmonic signal in the second harmonic peak integration area, and the second difference rate is used for representing the degree of difference of the second harmonic signal and the standard second harmonic signal in the second harmonic peak amplitude; determining a calibration error parameter according to the harmonic abnormal characteristics, the first difference rate and the second difference rate; and based on the calibration error parameter, performing calibration processing on the initially detected target gas concentration to obtain the calibrated target gas concentration. In one embodiment, the acquiring second harmonic signal data corresponding to the laser intensity signal from the sensor data includes: The laser intensity signal is modulated and demodulated to obtain second harmonic signal data corresponding to the laser intensity signal, wherein the second harmonic signal data comprise a first half-width of a second harmonic peak, a first integral area and a first amplitude, the first half-width is half-width corresponding to the peak of the second harmonic peak, the first integral area is an area surrounded by the peak of the second harmonic peak and a transverse coordinate, and the first amplitude is the amplitude corresponding to the peak of the second harmonic peak. In one embodiment, the standard second harmonic signal data includes a second half-width of a standard second harmonic peak, a second integration area, and a second amplitude, and determining harmonic anomaly characteristics from the second harmonic signal data and the standard second harmonic signal data, the first and second difference rates comprising: Determining an initial differ