CN203677065U - Infrared body temperature monitoring automatic calibration system - Google Patents

Abstract

The utility model relates to an infrared body temperature monitoring automatic calibration system. The system consists of infrared body temperature monitoring equipment, a calibration data processing center, auditory meatus temperature measuring equipment, environmental parameter monitoring equipment, an environmental parameter monitoring system and an infrared body temperature monitoring system; in the calibration data processing center, data analysis and processing are carried out by taking auditory meatus temperature T0 as reference temperature, environmental parameters as interference factors and shell temperature Ty as data information to be calibrated, and an environmental parameter-shell temperature-body temperature calibration parameter curve is established. A relatively simple, feasible, economic and effective method is adopted, and a plurality of problems of misinformation, misstatement, report missing and the like of infrared body temperature monitoring systems used in areas such as frontier ports at present are solved.

Description

A kind of infrared body temperature monitoring automated calibration system

Technical field

Relate to the Automatic Calibration Technique of infrared body temperature monitoring system, be specially adapted to region, frontier port entry and exit inspection of passengers passage infrared body temperature monitoring equipment in real time, calibration accurately.

Background technology

The object of temperature more than absolute zero (273 ℃), all can externally give off infrared ray, and object temperature is higher, and radiation is stronger.Infrared detector converts the signal such as wavelength, intensity of infra-red radiation to the signal of telecommunication, the signal of telecommunication changes the temperature value of measured target into after amplifier and signal processing, imaging device is by the spatial distribution of signal of telecommunication analog scanning body surface temperature, reach after treatment on display screen, obtain and the corresponding thermography of body surface heat distribution, thereby realize the hot status image imaging of distant object and thermometric and analyze judgement, the ultimate principle of Here it is infrared thermal imaging thermometric.This technology has been widely used for the fields such as industrial flaw detection, furnace temperature monitoring, military affairs.SARS epidemic period in 2003, infrared thermal imaging technique starts to be applied to the monitoring of crowd's shell temperature.Due to the method have automatically, fast, noncontact, automatic alarm, from advantages such as motion tracking heating persons, thereby be subject to the welcome of the place such as border port, station terminal related management department, during the prevention and control of the infectious disease such as SARS, influenza A, to fever patient, pivotal role has been played in screening.National each frontier port has extensively configured infrared body temperature monitoring system at present, for the monitoring of entry and exit of the port border personnel's shell temperature, in the prevention and control of entry and exit crowd infectious disease, plays a significant role.The theoretical foundation of infrared body temperature monitoring system is, by the monitoring of shell temperature, reacts the body temperature height of monitored individuality, and therefrom screening goes out the individuality such as fervescence, fever.Current infrared body temperature monitoring system can monitor people's shell temperature (being generally as the criterion with forehead or facial area temperature) comparatively accurately, through the calibration parameter of infrared body temperature monitoring system, calculate and revise rear output body temperature, but being instrumentation personnel, current calibration parameter rule of thumb simply the infrared shell temperature recording is added to corresponding temperature gap, can not the infrared shell temperature recording of actual response and passenger's body temperature corresponding relation.

Find by practice, (1) people's shell temperature is easily subject to the many factors impacts such as the temperature, humidity, wind speed, individual physical difference of external environment; (2) the interval calibration parameter of different body temperature is inconsistent.Existing infrared body temperature monitoring system can effectively be reacted crowd's shell temperature, but has obtained after shell temperature information, is occurring relatively large deviation in the time that the correction of infrared body temperature monitoring system changes into body temperature information.Find that after deliberation (1) existing temp measuring system calibration parameter lacks data supporting.At present, the setting of all calibration parameters in the temp measuring system of use safeguards that with the main temperature measuring equipment that relies on of debugging user of service's experience arranges, and therefore the real-time of the parameter setting of temperature measurer, science and effectiveness are all difficult to guarantee.(2) in the time that the ambient parameters such as temperature change greatly, people's shell temperature can change along with multifactor variations such as environmental changes, shell temperature and body temperature gap are in continuous variation, but the parameter setting of existing infrared temperature measurement system can not be in time along with ambient parameter changes and changes, therefore usually cause false, fail to report, be difficult to the requirement that meets port body temperature fast monitored, speeds passage through customs.(3) because current temp measuring system is distributed in each entry and exit port, the whole nation, many situations such as each port longitude of living in, dimension, weather conditions are different, and the calibration parameter setting of current infrared temperature measurement system does not fully take into account these factors.Therefore, existing infrared body temperature monitoring system often, because failing to report appears in the variation of external environment, wrong report, false alarm, has had a strong impact on the speed of being open to the custom and monitoring of infectious disease efficiency.

Utility model content

This utility model provides a kind of infrared body temperature monitoring calibration system, and this system is relatively simple, easily row, economy, effective method, solve the infrared body temperature monitoring system existence that the regions such as current frontier port use wrong report, the problems such as misrepresent deliberately, fail to report.

A kind of infrared body temperature monitoring automated calibration system of the present utility model, comprises infrared body temperature monitoring equipment and calibration data processing center, auditory meatus temperature measuring equipment, environmental parameter monitoring apparatus, environment parameter monitoring system, infrared body temperature monitoring system; They carry out transfer of data by wired or wireless mode; Wherein

(1) auditory meatus temperature measuring equipment, for gathering auditory canal temperature data T ₀, and transfer to calibration data processing center;

(2) environmental parameter monitoring apparatus: for gathering environmental correclation information, and environmental information is changed into the signal of telecommunication, transfer to environment parameter monitoring system;

(3) environment parameter monitoring system, after receiving the signal of telecommunication collecting, by date processing, is converted into ambient parameter data, and transfers to calibration data processing center;

(4) infrared shell temperature monitoring equipment, for the body surface infrared information of acquisition step (1) same individual, and changes into the signal of telecommunication by infrared information, transfers to infrared body temperature monitoring system;

(5) infrared body temperature monitoring system, the signal of telecommunication transmitting for receiving infrared shell temperature monitoring equipment, carries out date processing by the signal of telecommunication, is converted into shell temperature T _yimport calibration data processing center into;

(6) calibration data processing center, for the auditory canal temperature of collecting, ambient parameter, infrared shell temperature are carried out to data analysis and process, sets up the calibration parameter curve of ambient parameter-shell temperature-body temperature.

Ambient parameter described in this utility model comprises ambient temperature T _x, humidity RH _x, wind speed V _1X, human motion speed V _2x, air pressure P _x, CO ₂concentration C _bX, dust concentration C _{powder X}, Heat-Source Parameters K around _x, with respect to lens location coordinate parameters a=(x, y, z).

This utility model alignment data processing centre carries out data analysis and process by autoregression model algorithm scheduling algorithm.

Above-mentioned a kind of infrared body temperature monitoring automated calibration system, comprises the following steps when use:

(1) obtain people's auditory canal temperature T by auditory meatus temperature measuring equipment ₀, transfer to calibration data processing center;

(2) obtain ambient temperature information by environmental parameter monitoring apparatus, by environmental monitoring system, ambient parameter data is transferred to data processing centre;

(3) by the body surface infrared information of same individual in infrared shell temperature monitoring equipment acquisition step (1), and infrared information is changed into the signal of telecommunication, transfer to infrared body temperature monitoring system;

(4) infrared body temperature monitoring system is carried out date processing by receiving the signal of telecommunication that infrared shell temperature monitoring equipment transmits, and is converted into shell temperature T _yimport calibration data processing center into;

(6) calibration data processing center is with auditory canal temperature T ₀for fiducial temperature, ambient parameter is as interference factor, shell temperature T _yas data message to be calibrated, carry out data analysis and process, set up the calibration parameter curve of ambient parameter-shell temperature-body temperature.

Compared with existing temp measuring system, this calibration system has selected more accurately auditory canal temperature as standard source, automatically gather ambient parameter information simultaneously, can automatically adjust existing infrared temperature measurement system calibration parameter curve (ambient parameter-shell temperature-body temperature fair curve) setting according to environmental change, reach the object of the intelligent adjustment of existing infrared temperature measurement system self parameter.Improve to greatest extent science, effectiveness and the accuracy of the region infrared body temperature monitorings such as frontier port, improved Frontier Area be open to the custom speed and monitoring of infectious disease efficiency.

Accompanying drawing explanation

Fig. 1 is infrared body temperature monitoring calibration system structural representation.

The specific embodiment

Embodiment of the present utility model: find according to scientific research, people's the more close heat center of auditory meatus, therefore auditory canal temperature more approaches body temperature than auxillary temperature.Ear temperature more easily obtains than auxillary temperature simultaneously, is more easily accepted by entry and exit crowd.Therefore select ear temperature to can be used as body temperature reference standard.

The selection ear temperature T of infrared body temperature monitoring calibration system ₀as fiducial temperature parameter, Environment parameter is as ambient temperature T _x, humidity RH _x, wind speed V _1X, human motion speed V _2x, air pressure P _x, CO ₂concentration C _bX, dust concentration C _{powder X}, Heat-Source Parameters K around _x, with respect to lens location coordinate parameters a=(x, y, z) etc. parameter as influence factor, the infrared shell temperature T that infrared temperature measurement system is monitored _bthe parameters such as x, as input quantity, then adopt autoregression model scheduling algorithm to process the data that collect, specific as follows:

This utility model passes through environmental parameter monitoring apparatus by environmental parameter monitoring apparatus, obtains in real time ambient parameter: ambient temperature T _x, humidity RH _x, wind speed V _1X, human motion speed V _2x, air pressure P _x, CO ₂concentration C _bX, dust concentration C _{powder X}, with respect to lens location coordinate parameters a=(x, y, z) etc. parameter.

1, infrared shell temperature monitoring device, passes through crowd's body surface infrared information for Real-time Collection, and infrared information is changed into the signal of telecommunication, transfers to infrared body temperature monitoring system; Infrared body temperature monitoring system, the signal of telecommunication transmitting for receiving infrared body temperature monitoring equipment, carries out date processing by the signal of telecommunication, is converted into shell temperature.

2, select the Different Individual passenger through passage, utilize auditory meatus temperature measuring equipment, read human body ear temperature information T ₀, as the fiducial temperature of calibration, wireless automatic transmission technology, imports calibration data processing center into; On ear temperature detector measurement equipment, automatic positioning equipment is installed and is sent framing signal simultaneously, this passenger's that infrared shell temperature monitoring equipment is got shell temperature information T _yimport calibration data processing center into.

3, adopt autoregression model scheduling algorithm in infrared temperature measurement system computer calibration data processing center, take obtain auditory canal temperature as standard temperature, take the ambient parameter that obtains as influence factor, the temperature that infrared temperature measurement system is obtained is analyzed and computing, obtains real time calibration parameter curve.

4, automatically import in infrared body temperature monitoring system analyzing the parameter curve obtaining, realize the enforcement real time calibration to infrared temperature measurement system;

5, in the time that ear Wen Yiwei starts, the real time information that computer data processing center is obtained according to environment parameter monitoring system, automatically transfer historical calibration information data base and carry out active analysis, provide real time calibration parameter curve (ambient parameter-shell temperature-body temperature fair curve), to infrared body temperature monitoring system real time calibration.

6, certainly return model algorithm as follows:

Note x ₁(n), x ₂(n), x ₃(n) ... x _n(n) represent n moment, N parameter (ambient temperature T _x, humidity RH _x, wind speed V _x, air pressure P _x, CO ₂concentration C _bX, dust concentration C _{powder X}, Heat-Source Parameters K around _x, with respect to lens location coordinate parameters a=(x, y, z), infrared shell temperature T _yetc. parameter) observation.Y (n) represents the actual temperature of n moment target.Consider the accuracy of ear temperature instrument thermometric, therefore the data that ear Wen Yi can be recorded as effective estimation of the actual temperature of target.I.e. supposition:

$y\left(n\right)=\tilde{y}\left(n\right)---\left(1\right)$

Suppose the function that realistic objective temperature y (n) is N observed parameter:

y(n)＝f(x ₁(n),x ₂(n)...x _N(n)) (2)

Bring (2) formula into (1) formula, can obtain

$\tilde{y}\left(n\right)=f(x_1\left(n\right),x_2\left(n\right)...x_N\left(n\right))---\left(3\right)$

The key of this problem is, by the data that obtained, obtains the optimal estimation of function f ().Suppose and between each parameter, meet following relation:

$\tilde{y}\left(n\right)=h_1{x}_1\left(n\right)+h_2{x}_2\left(n\right)+...h_N{x}_N\left(N\right)+{\mathrm{\ϵ}}_n---\left(4\right)$

Wherein, ε is noise, is stochastic variable, supposes that it is distributed as Φ (0, δ ²).The observation in its n moment is ε _n, for not in the same time, (4) formula can be expressed as:

$\left(\begin{array}{c}\tilde{y}\left(1\right)\\ \tilde{y}\left(2\right)\\ \·\·\·\\ \tilde{y}\left(N\right)\end{array}\right)=\left(\begin{array}{c}{x}_1\left(1\right)x_2\left(1\right)...x_N\left(1\right)\\ x_1\left(2\right)x_2\left(2\right)...x_N\left(2\right)\\ \·\·\·\\ x_1\left(N\right)x_2\left(N\right)...x_N\left(N\right)\end{array}\right)\left(\begin{array}{c}{h}_1\\ h_2\\ \·\·\·\\ h_N\end{array}\right)+\left(\begin{array}{c}{\mathrm{\ϵ}}_1\\ {\mathrm{\ϵ}}_2\\ \·\·\·\\ {\mathrm{\ϵ}}_N\end{array}\right)---\left(5\right)$

Can be expressed as matrix form:

Y＝Xh+ε (6)

Based on the principle of least square, in (6) formula, one of coefficient vector is estimated as:

$\hat{h}={\left(X^{H}X\right)}^{-1}{X}^H\tilde{y}---\left(7\right)$

Wherein, () ^hthe conjugate transpose of representing matrix, () ^-1inverting of representing matrix.

Claims (1)

1. an infrared body temperature monitoring automated calibration system, comprises infrared body temperature monitoring equipment and calibration data processing center, characterized by further comprising auditory meatus temperature measuring equipment, environmental parameter monitoring apparatus, environment parameter monitoring system, infrared body temperature monitoring system; Wherein

(1) auditory meatus temperature measuring equipment, for gathering auditory canal temperature data T ₀, and transfer to calibration data processing center;

(2) environmental parameter monitoring apparatus: for gathering environmental correclation information, and environmental information is changed into the signal of telecommunication, transfer to environment parameter monitoring system;

(3) environment parameter monitoring system, after receiving the signal of telecommunication collecting, passes through data. and process, and be converted into ambient parameter data, and transfer to calibration data processing center;

(4) infrared shell temperature monitoring equipment, for the body surface infrared information of acquisition step (1) same individual, and changes into the signal of telecommunication by infrared information, transfers to infrared body temperature monitoring system;

(5) infrared body temperature monitoring system, the signal of telecommunication transmitting for receiving infrared shell temperature monitoring equipment, carries out date processing by the signal of telecommunication, is converted into shell temperature T _yimport calibration data processing center into;

(6) calibration data processing center, for the auditory canal temperature of collecting, ambient parameter, infrared shell temperature are carried out to data analysis and process, sets up the calibration parameter curve of ambient parameter-shell temperature-body temperature.

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