阅读说明：本技术 红外热成像设备的检测系统 (The detection system of infrared thermal imaging equipment ) 是由 宋振铎 石鑫 宋鸿鸣 李召 于 2019-08-14 设计创作，主要内容包括：本发明提出了一种红外热成像设备的检测系统,其中,系统包括：目标靶、背景黑体、温度检测组件、温度调节组件和控制组件,以采集目标靶和背景黑体的当前温度；温度调节组件,以升高或降低背景黑体的当前温度；控制组件控制温度调节组件调节背景黑体的当前温度,使得在目标靶和背景黑体的当前温度差与设定目标温差一致时,供待检测红外热成像设备生成热图像,以根据热图像得到检测结果。本发明实施例的系统可以在无准直光学系统的情况下,红外热成像设备可直接对目标靶生成热图像,供检测者观察检测其综合参数,有效解决了其它红外热成像设备检测系统携行和外场使用不便、难用于原位检测、价格昂贵和精度低等难题,且结构简单,易于实现。(The invention proposes a kind of detection systems of infrared thermal imaging equipment, wherein system includes: target, background black matrix, temperature sensing assembly, temperature-controlled package and control assembly, to acquire the Current Temperatures of target and background black matrix；Temperature-controlled package, the Current Temperatures of background black matrix are raised and lowered；Control assembly controls the Current Temperatures that temperature-controlled package adjusts background black matrix, so that thermal image is generated for infrared thermal imaging equipment to be detected, when the Current Temperatures difference of target and background black matrix is consistent with setting target temperature difference to obtain testing result according to thermal image.The system of the embodiment of the present invention can be in the case where no collimating optical system, infrared thermal imaging equipment directly can generate thermal image to target, it is observed for tester and detects its comprehensive parameters, efficiently solve other infrared thermal imaging device detection system portables and line it is inconvenient, it is difficult in situ detection, the expensive problems such as low with precision, and it has the advantages of simple structure and easy realization.)

1. a kind of detection system of infrared thermal imaging equipment characterized by comprising

Target and background black matrix；

Temperature sensing assembly, the temperature sensing assembly is connected with the target and the background black matrix respectively, to acquire State the Current Temperatures of target and the background black matrix；

Temperature-controlled package, the temperature-controlled package are connected with the background black matrix, the background black matrix is raised and lowered Current Temperatures；And

Control assembly, the control assembly are connected with the temperature sensing assembly and the temperature-controlled package respectively, control institute The Current Temperatures that temperature-controlled package adjusts the background black matrix are stated, so that in the current of the target and the background black matrix When temperature difference is consistent with the target temperature difference of setting, thermal image is generated for infrared thermal imaging equipment to be detected, according to the thermal map As obtaining testing result.

2. system according to claim 1, which is characterized in that the control assembly includes:

Control unit, using the Current Temperatures of the target and the background black matrix as input to carry out PID closed-loop control, directly The current temperature difference to output reaches the target temperature difference of the setting, and remains unchanged.

3. system according to claim 1, which is characterized in that the detection components include:

The first temperature sensor on the target is set；

Second temperature sensor on the background black matrix is set.

4. system according to claim 1, which is characterized in that further include:

Range measurement regulating device, the range measurement regulating device respectively with the target and it is described it is to be measured it is infrared heat at As equipment is connected, with according to the spatial frequency of the target and requirement adjust the infrared thermal imaging equipment to be measured with it is described Distance between target.

5. system according to claim 1, which is characterized in that the temperature-controlled package is Peltier devices.

6. system according to claim 1 or 5, which is characterized in that the system also includes:

The cooling fin and radiator fan being correspondingly arranged with the background black matrix, to radiate.

7. system according to claim 1, which is characterized in that the system also includes:

The radiant panel being correspondingly arranged with the target, to increase the thermal capacity of the target.

8. system according to claim 1, which is characterized in that the system also includes: protection shell.

9. system according to claim 1-8, which is characterized in that the target and the background black matrix are by leading The material that hot coefficient is greater than the first preset value is made, and appearance sprays identical preset thickness and radiance is greater than the second preset value Black matrix paint.

Technical field

The present invention relates to infrared thermal imaging equipment technical field, in particular to a kind of detection system of infrared thermal imaging equipment System.

Background technique

The comprehensive parameters of infrared thermal imaging equipment have NETD (noise-equivalent temperature Difference, noise equivalent temperature difference is hereinafter referred to as), MRTD (minimum resolvable temperature Difference, the minimum distinguishable temperature difference) and MDTD (minimum detectable temperature difference, The minimum detectable temperature difference).It currently, is all to be set using the same detection with collimating optical system to these three parameters both at home and abroad Standby completing detection, only target target shape is different.The equipment is formed substantially including target, background black matrix, to target and back The measuring and controlling temp electronic system of scape black matrix projects target image the collimating optics system picked up in infrared thermal imaging equipment System.

However, the comprehensive parameters detection device weight and body of the existing infrared thermal imaging equipment with collimating optical system Product is big, and environmental condition requires height, can only use being fixed in Special experimental room, be not easy to portable and line, it is more difficult to It sets up and is picked up near infrared thermal imaging equipment, carry out in situ detection.Especially infrared thermal imaging detector is quick in recent years Development, spatial resolution is higher and higher, the spatial frequency f of testing requirements₀Also higher and higher, wherein spatial frequency f₀Refer to unit view The periodicity that light and shade or cold and hot striped repeat in angle, unit is: week/milliradian (cy/mrad), so as to cause optical system Focal length and volume dramatically increase, and portable and line are inconvenient, are unable in situ detection.

Summary of the invention

The present invention is directed to solve at least some of the technical problems in related technologies.

For this purpose, the system is without collimated light it is an object of the invention to propose a kind of detection system of infrared thermal imaging equipment System directly detects infrared thermal imaging equipment complex parameter in the method for being detected infrared thermal imagery equipment object observing target, has Effect improves the applicability and practicability of detection, efficiently solves portable and line is inconvenient, difficult high in situ detection, price Expensive problem, and simple easily realization.

In order to achieve the above objectives, the invention proposes a kind of detection systems of infrared thermal imaging equipment, comprising: target and Background black matrix；Temperature sensing assembly, the temperature sensing assembly is connected with the target and the background black matrix respectively, to adopt Collect the Current Temperatures of the target and the background black matrix；Temperature-controlled package, the temperature-controlled package and the background Black matrix is connected, the Current Temperatures of the background black matrix are raised and lowered；Control assembly, the control assembly respectively with the temperature Degree detection components are connected with the temperature-controlled package, control the current temperature that the temperature-controlled package adjusts the background black matrix Degree, so that confession is to be detected when the Current Temperatures difference of the target and the background black matrix is consistent with the target temperature difference of setting Infrared thermal imaging equipment generates thermal image, to obtain testing result according to the thermal image.

The detection system of infrared thermal imaging equipment of the invention, has abandoned collimating optical system, and tester is red by observing The target and background black matrix thermal image that outer thermal imaging apparatus generates, detection minimum distinguishable temperature difference of infrared thermal imaging equipment etc. are comprehensive The performances such as parameter are closed, the applicability and practicability of detection are effectively improved, solve portable and line and in situ detection Problem is simple easily to realize.

Further, the control assembly includes: control unit, with the current temperature of the target and the background black matrix Degree, to carry out PID closed-loop control, until the current temperature difference of output reaches the target temperature difference of the setting, and is protected as input It holds constant.

Further, the detection components include: the first temperature sensor being arranged on the target；Setting is in institute State the second temperature sensor on background black matrix.

Further, further includes: range measurement regulating device, the range measurement regulating device respectively with the target It is connected with the infrared thermal imaging equipment to be measured, it is described to be measured to be adjusted according to the spatial frequency of the target and requirement Infrared thermal imaging equipment between the target at a distance from.

Further, the temperature-controlled package is Peltier devices.

Further, the system also includes the cooling fin and radiator fan that are correspondingly arranged with the background black matrix, so as to Heat dissipation.

Further, the system also includes the radiant panels being correspondingly arranged with the target, to increase the target Thermal capacity.

Further, the system also includes: protection shell.

Further, the target and the background black matrix are made of the material that thermal coefficient is greater than the first preset value, And appearance sprays identical preset thickness and radiance is greater than the black matrix paint of the second preset value.

The detection method of the infrared thermal imaging equipment of the embodiment of the present invention, can without collimating optical system detect it is infrared heat at As equipment complex parameter, collimating optical system is abandoned, structure has been simplified, reduces volume and weight, reduce costs, have Portability and in situ detection ability generate thermal image for infrared thermal imaging equipment to be detected, and are observed and examined by testing staff Survey result.The applicability and practicability for effectively improving detection, efficiently solve the difficulty of portable and line and in situ detection Topic is simple easily to realize.

The additional aspect of the present invention and advantage will be set forth in part in the description, and will partially become from the following description Obviously, or practice through the invention is recognized.

Detailed description of the invention

Above-mentioned and/or additional aspect and advantage of the invention will become from the following description of the accompanying drawings of embodiments Obviously and it is readily appreciated that, in which:

Fig. 1 is the detection device schematic diagram with collimating optical system of the relevant technologies (target is four bar targets)；

Fig. 2 is the vehicle-mounted type infrared thermal imaging device comprehensive parameters detection device of the relevant technologies；

Fig. 3 is the structural schematic diagram according to the detection system of the infrared thermal imaging equipment of the embodiment of the present invention；

Fig. 4 is the structural schematic diagram according to the detection system of the infrared thermal imaging equipment of one embodiment of the invention；

Fig. 5 is the four bar target schematic diagrames according to the detection MRTD of the embodiment of the present invention；

Fig. 6 is the circular hole targets schematic diagram according to the detection NETD of the embodiment of the present invention；

Fig. 7 is the square hole target schematic diagram according to the detection MDTD of the embodiment of the present invention；

Fig. 8 is the measuring and controlling temp working principle diagram according to the embodiment of the present invention；

Fig. 9 is the control system working principle diagram according to the embodiment of the present invention；

Figure 10 is the Control System Software flow chart according to the embodiment of the present invention；

Figure 11 is the differential temperature survey and control logic flow chart according to the embodiment of the present invention；

Figure 12 is the target and background black matrix structure chart according to the embodiment of the present invention；

Figure 13 is the work flow diagram according to the detection system of the infrared thermal imaging equipment of the embodiment of the present invention；

Figure 14 is the detection method flow chart according to the infrared thermal imaging equipment of the embodiment of the present invention.

Specific embodiment

The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.

Before the detection system and method for introducing infrared thermal imaging equipment proposed by the present invention, phase is first simply introduced Pass technology.

Black body radiation obey Planck law: it describe temperature be T ideal black-body radiant exitance Me (λ, T) with The rule of wavelength X variation, expression formula are as shown in Equation 1:

In formula: C₁And C₂Respectively the first and second radiation constants.

According to Planck law, any object higher than absolute zero all emits electromagnetic wave, in visible light to millimeter wave The micron order electromagnetic radiation of wave band is infrared light, and the radiation energy of target and background concentrates on 3 μm~12 μm models under natural temperature In enclosing, wherein 3 μm~5 μm medium-wave bands and 8 μm~12 μm long wave band infra-red radiations in atmospheric window, have remote pass Defeated and detected ability.

Infrared thermal imaging equipment is that a kind of handle is quick to 3 μm~5 μm medium waves or 8 μm~12 μm long wave band infrared energies The detector array device of sense is imaged on display screen, for the instrument of eye-observation.Such equipment is generally by infrared imaging optics System, infrared array sensitive detection parts, processing circuit, display and control circuit composition,

For infrared thermal imaging equipment similar to visual light imaging equipment, comprehensive measure is that spatial resolution and temperature are differentiated Power, mainly: noise equivalent temperature difference (NETD), the minimum distinguishable temperature difference (MRTD) and the minimum detectable temperature difference (MDTD).These The detection of parameter is detected to the target of prescribed level or spatial frequency, under the smallest target and the background black matrix temperature difference , the detection of these three parameters is completed by the same detection device, and only the target type of target is different.

The comprehensive parameters detection device of current infrared thermal imaging equipment both domestic and external is all with collimating optical system. It forms substantially including background black matrix, target, to the measuring and controlling temp electronic system of target and background black matrix, target image Project the collimating optical system (including plane mirror and off-axis parabolic mirror) picked up in infrared thermal imaging equipment.

The detection of noise equivalent temperature difference (NETD), the minimum distinguishable temperature difference (MRTD) and the minimum detectable temperature difference (MDTD) is complete Same covering device is used entirely, and only target target shape is different, that is, is respectively as follows: circular, four bar targets and square target, space Frequency is higher, and target type size is smaller.This kind of principle of device is as shown in Figure 1.Also have in the related technology using Cassegrain's optical system System.

Their common feature is that have collimating optical system.The focal length of collimating optical system and the spatial frequency of requirement f₀It is closely related, i.e. spatial frequency f₀It is higher, it is desirable that the smaller or focal length of four bar target target bar width and interval is bigger.Currently, it is suitable for Spatial frequency f₀For the minimum distinguishable temperature difference MRTD detection device of 3~4cy/mrad, collimating optical system focal length in laboratory General 4m, the general 1m of vehicle-mounted MRTD detection device collimating optical system focal length (such as 2 institute of apparatus structure being loaded on engineering truck Show).

However, the relevant technologies have following defects that

By taking four bar targets is the detection devices with collimating optical system of target as an example, optical system focal length r, spatial frequency f₀, the four each target bars of bar target width b just like relationship shown in formula 2:

Such as: as spatial frequency 3.0cy/mrad, focal length 4000mm, the wide 0.67mm of target bar.

This dependence of the size of spatial frequency, focal length and target, has the following problems this kind of detection device.

Problem 1: focal length is long, and weight is big, cannot portable and in situ detection.

In the case where detecting spatial frequency situation of less demanding, for four bar targets of 4m focal length collimating optical system, processing is protected Mild thermometric can also be realized, but this detection device dimensional weight is very big, general 6m of length or so, volume 15m³It controls, again 300kg or so is measured, this is the basic parameter of the detection device currently generally used in laboratory.

To realize vehicle-mounted use, focal length is generally reduced to 1m or so, at this point, to realize that spatial frequency 3cy/mrad is detected Condition, target bar width are reduced to 0.17mm, and so small target bar processing, surface treatment, thermometric and temperature control are difficult, control essence Degree is also poor, but this kind of mobile unit volume, weight etc. have significantly reduced than the experiment indoor equipment of focal length 4m focal length, uses In shelter vehicle deliver with using also reluctantly can be with.

But in recent years, with such as 640 × 480 and 1280 × 960 yuan of large area array, small pixel multiunit detector part Appearance, infrared thermal imaging device space resolving power increases substantially, and the spatial frequency that when detection requires also significantly improves, such as machine The detection spatial frequency for carrying the infrared thermal imaging equipment MRTD of gondola reaches 7.5cy/mrad, the four bar target of detection device of 1m focal length Target bar width is reduced to 0.066mm, and the so small four bar targets processing of size is very difficult, and can not to its accurate measuring and controlling temp It is able to achieve.

As it can be seen that due to the limitation of volume weight, the detection device of the infrared thermal imaging equipment with collimating optical system, no Outfield may be arrived as Portable inspecting instrument device portable, to being picked up infrared thermal imaging equipment implementation in situ detection, it is necessary to being picked up Equipment is disassembled on platform from using, and is taken in laboratory, examinations.This mode inevitably brings mounting means The caused testing result inaccuracy untrue, detection is inconsistent with use environment and the not high problem of confidence level.Furthermore it is picked up red Often not one, two places are loaded and unloaded at a distance, transport and were detected for outer thermal imaging apparatus mounting platform and detecting instrument device Journey often time-consuming several months, very big inconvenience also is brought to user and producer.

Problem two: using approximation space frequency detecting, influences the accuracy of MRTD detection.

By formula 2 it is found that due to collimating optical system focal length be it is fixed, when need using different space frequency condition examine When survey, need to convert corresponding target type.And manufacturing firm can only be equipped with the target type of several typical sizes when detection device factory, in this way It just often leads to select to approach under normal circumstances that the typical sizes target of spatial frequency is required to be detected.In other words, practical Detect use spatial frequency with require spatial frequency can only it is approximate unanimously.It is well known that infrared thermal imagery equipment is minimum distinguishable Temperature difference MRTD etc. is often very sensitive to detection spatial frequency, especially more violent when spatial frequency is higher, different space frequency The testing conditions MRTD value that can lead to detection have large error.

Problem three: optical system difficult processing, use condition require sternly, to purchase maintenance cost height

Large-aperture long-focus off axis paraboloid mirror optical system, difficulty of processing is big, and installation space size is also bigger, Er Qiewei Meet small four bars target measuring and controlling temp required precision, MRTD detection device must be placed in the quite stable laboratory of air temperature and current It is interior, it is necessary to be placed in monolithic optical stable platform, these result in production, processing, installation and maintenance cost and increase.

To sum up: the infrared thermal imaging equipment MRTD detection device with collimating optical system is at high cost, volume weight is big, no Energy in situ detection, can only generally be provided in thermal imaging apparatus research and production unit, be operated with by professional technician, cannot It is installed to infrared thermal imaging equipment user, operator operates with by thermal imaging apparatus.This also limiting and detecting device significantly Equip use scope.And approximation space frequency detecting is often used, testing result error is larger.

Therefore, for solve with collimating optical system infrared thermal imaging assembly detection apparatus is at high cost, volume and weight Greatly, it is unable in situ detection, and often using the problem of the target type detection of approximation space frequency etc., the invention proposes do not have to standard Straight optical system, the infrared thermal imaging equipment complex parameter detecting technology of the target and background black matrix thermal image directly observed.

The detection system and method for infrared thermal imaging equipment proposed according to embodiments of the present invention is described with reference to the accompanying drawings, The detection system of the infrared thermal imaging equipment proposed according to embodiments of the present invention is described with reference to the accompanying drawings first.

Fig. 3 is the structural schematic diagram of the detection system of the infrared thermal imaging equipment of one embodiment of the invention.

As shown in figure 3, the detection system 10 of the infrared thermal imaging equipment includes: target 100, background black matrix 200, temperature Detection components 300, temperature-controlled package 400 and control assembly 500.

Wherein, temperature sensing assembly 300 is connected with target 100 and background black matrix 200 respectively, to acquire target 100 With the Current Temperatures of background black matrix 200.Temperature-controlled package 400 is connected with background black matrix 200, background black matrix is raised and lowered 200 Current Temperatures.Control assembly 500 is connected with temperature sensing assembly 300 and temperature-controlled package 400 respectively, controls temperature The Current Temperatures that component 400 adjusts background black matrix 200 are adjusted, so that in the Current Temperatures of target 100 and background black matrix 200 When difference is consistent with setting target temperature difference, thermal image is generated for infrared thermal imaging equipment to be detected, to be detected according to thermal image As a result target and background black matrix thermal image that tester can be generated by observation infrared thermal imaging equipment, detect infrared thermal imaging The performances such as the minimum distinguishable temperature difference MRTD of equipment, tester can pass through the target and background of observation infrared thermal imaging equipment generation Black matrix thermal image, the performances such as detection minimum distinguishable temperature difference MRTD of infrared thermal imaging equipment.The system 10 of the embodiment of the present invention can It is simple easily to realize to solve the problems, such as portable and line and in situ detection.

It is understood that temperature-controlled package 400 can be Peltier devices, the system 10 of the embodiment of the present invention passes through The precision temperature sensor being embedded in target 100 and background black matrix 200, temperature sensing assembly 200 can measure target 100 With the temperature and the temperature difference of background black matrix 200, and the Peltier devices by being fitted on background black matrix 100 are by the temperature difference pair of setting Target 100 and 200 temperature difference of background black matrix carry out accuracy controlling, stablize the temperature difference of target and background black matrix in setting magnitude On.

Specifically, as shown in figure 4, the system 10 of the embodiment of the present invention includes target 100, background black matrix 200 and thermometric Temperature control electronic system, wherein measuring and controlling temp electronic system includes temperature sensing assembly 300, temperature-controlled package 400, will be following Measuring and controlling temp electronic system is discussed in detail, does not do excessive description herein.Control assembly 500 is properly termed as control system.The present invention Heavy, complicated, expensive collimating optical system is omitted in the system 10 of embodiment, is directly observed by being picked up thermal imaging equipment with rule Determine thermal image formed by the target and background black matrix of the temperature difference, detects the comprehensive parameters of infrared thermal imaging equipment.Wherein, it can detect Three comprehensive parameters of infrared thermal imaging equipment: it noise equivalent temperature difference (NETD), the minimum distinguishable temperature difference (MRTD) and minimum visits Thermometric is poor (MDTD), and background black matrix is identical with measuring and controlling temp electronic system, and only the target type of target is different.

It should be noted that (1) infrared thermal imaging equipment, utilizes infrared imaging object lens, infrared detector, signal processing electricity Road and display device are converted to the distribution map of 3 μm~5 μm of target and background or 8 μm~12 μm of infrared energies visible Thermal image the equipment or instrument, different gray scales represent different temperature on thermal image.

(2) black matrix, is 1 to incident electromagnetic radiation (herein referring to infrared band) S. E. A., and reflection or transmissivity are Zero object.

(3) minimum distinguishable temperature difference MRTD is the comprehensive of overall merit infrared thermal imagery device space resolving power and temperature resolving power Parameter is closed, is defined as: in homogeneous background black matrix, there is a certain spatial frequency f₀Depth-width ratio 7 to 1 four items Thermal imagery pattern with black matrix target (referred to as four bar targets), the minimum temperature that observer can tell wherein four bands are poor.Referred to as The minimum distinguishable temperature difference of the infrared thermal imaging equipment in the case where providing spatial frequency.The standard target type of detection is as shown in Figure 4.

(4) noise equivalent temperature difference (NETD) is the important parameter for characterizing the sensitivity of infrared thermal imaging device temperature, definition It is: the temperature difference when signal caused by the object to be imaged is just equal to system output noise.Standard target type such as Fig. 5 institute of detection Show.

(5) the minimum detectable temperature difference (MDTD) is that straight observer can just tell from infrared thermal imaging device display screen The temperature difference of the target of target with respect to background.Standard target target pattern is as shown in Figure 6.

Specifically, there are three comprehensive parameters for infrared thermal imaging equipment: noise equivalent temperature difference (NETD), minimum distinguishable temperature Poor (MRTD) and the minimum detectable temperature difference (MDTD).Target target type is as shown in table 1, respectively four bar targets, circular hole targets and square hole Target, informal voucher or hole are transmission part in figure, and black is not transmission part.Target and background black matrix ontology are such as purple using same material Copper is at surface is coated with same high radiant rate black matrix paint, to guarantee that target and background black matrix have identical emission ratio.This Every transmission informal voucher band of four bar targets and secret note bandwidth of inventive embodiments are 5mm, a length of 35mm, i.e., each pair of target bar 10mm.Its In, table 1 is three kinds of target type tables of target.

Table 1

Further, in one embodiment of the invention, the system 10 of the embodiment of the present invention further include: range measurement tune Regulating device.Wherein, range measurement regulating device is connected with target and infrared thermal imaging equipment to be measured respectively, according to target And the spatial frequency of testing requirements adjust infrared thermal imaging equipment to be measured between target at a distance from.It should be noted that this hair The system space frequency f of bright embodiment₀Setting, by tested infrared thermal imagery equipment and target apart from determining.

Specifically, to detect four pairs of length-width ratios of minimum distinguishable temperature difference MRTD as light transmission/lighttight band of 7:1 For the four bar targets constituted, under conditions of four bar target target size b has been determined, spatial frequency f₀Setting, be only dependent upon inspection It surveys device and is picked up equipment spacing from L, as shown in formula 3:

Or

L=2bf₀×10³ (4)

If the minimum image-forming range of the infrared thermal imaging component of certain type Review for Helicopter gondola is 50m, the minimum distinguishable temperature difference MRTD is 0.5K (f₀=7.5cy/mrad), then being 5mm target bar width design, detecting distance is placed in 75m, can realize f₀ The testing conditions of=7.5cy/mrad.

In other words, in the case where fixed target bar width, as long as adjustment detecting distance L, can realize different space frequency f₀The setting of this testing conditions.

It should be noted that general thermal imaging instrument optical system focal length is all tens millimeters, and detecting distance is tens Rice, detecting distance are 1000 times of imaging system focal length, meet incident parallel striation part；Furthermore detecting distance also meets infrared thermal imagery The requirement of equipment minimum image-forming range, has blur-free imaging condition.

Further, the detection system of infrared thermal imaging equipment will be described in detail below.

In one embodiment of the invention, temperature sensing assembly 300 includes: that the first temperature sensor and second temperature pass Sensor.Wherein, the first temperature sensor is embedded in target；Second temperature sensor is embedded in background black matrix.

Further, in one embodiment of the invention, temperature-controlled package 400 can be Peltier devices.It can be with Understand, the semiconductor devices with Peltier (paltier) effect, which, which refers to work as, is made up of electric current different conductor Circuit when, in addition to generating irreversible Joule heat, in the joint of different conductor as current direction difference will appear respectively The phenomenon that exothermic/endothermic

Further, in one embodiment of the invention, system further include: the cooling fin being correspondingly arranged with background black matrix And radiator fan, to radiate；The radiant panel being correspondingly arranged with target, to increase the thermal capacity of target.

Specifically, the final purpose of the embodiment of the present invention is to construct the target for having identical radiance Yu the regulation temperature difference Target and background black matrix.Measuring and controlling temp basic principle is introduced first, as shown in figure 8, measuring and controlling temp electronic system is by being embedded in The Paar that temperature sensor I in target, the temperature sensor II being embedded in background black matrix and background black matrix fit closely Temperature control device, radiator fan and measuring and controlling temp computer composition are pasted, measuring and controlling temp computer includes host, manipulation keyboard, display Screen etc..

Measuring and controlling temp electronic system working principle is: after system electrification, being operated first personnel by manipulation keyboard and sets mesh The temperature difference of target and background black matrix, after confirmation, computer system measures target and black matrix by temperature sensor I and II The temperature of background subtracts each other the actual temperature of the two measured, and the temperature difference of formation is compared with the temperature difference of setting, with two temperature The difference of degree difference is that input forms control instruction, through power amplification, drives the temperature of Peltier devices adjustment background black matrix, adjustment For background blackbody temperature afterwards through temperature sensor II, feedback arrives computer system, then subtracts each other with the temperature of temperature sensor I, uses The difference of the actual temperature difference and set temperature difference that measure for the second time forms control instruction again, and driving Peltier devices work, Until actual temperature difference is equal with set temperature difference, and kept it.

Thermometric is to target and background black matrix while to carry out, but temperature adjustment temperature control only carries out background black matrix.Work as setting Target with respect to background be positive the temperature difference when, can pass through reduce background blackbody temperature realize；Conversely, when setting target is with respect to background When the temperature difference that is negative, it can be realized by improving background blackbody temperature.

Further, in one embodiment of the invention, control assembly 500 includes: control unit.Wherein, control is single Member is using the Current Temperatures of target 100 and background black matrix 200 as inputting to carry out PID closed-loop control, until output is current The temperature difference reaches the target temperature difference of setting, and remains unchanged.

Further, in one embodiment of the invention, control assembly is further used for micro- by ratio-integral- Sub-control system generates control instruction, and optimizes proportionality coefficient, integral coefficient and derivative time constant, so that Current Temperatures difference and setting Target temperature difference is consistent.

Further, in one embodiment of the invention, control assembly is further used for radiating according to Planck blackbody Law carries out temperature-compensating, so that the target and background black matrix of same apparent temperature difference have under the conditions of varying environment temperature Identical radiation intensity is poor under the conditions of normal temperature.

Specifically, to realize reliably working under condition of external field, it is necessary to solve -40 DEG C of environment temperature~50 DEG C and become on a large scale Change, in the case of the flowing of the air such as wind leads to target and background blackbody temperature and difference variation, accurate thermometric, fast regulating temperature, essence True temperature control is stablized the problem of heat preservation, and control system of the present invention takes the technologies such as PID control, temperature-compensating and dynamic compensation, control System principle is as shown in Figure 9.

1) PID control.PID control strategy, i.e. ratio-integral-differential control are taken in control instruction generation, and optimize Proportionality coefficient, integral coefficient and derivative time constant keep system overshoot small, and response is fast, and robustness is good.

2) temperature-compensating.Since the environment temperatures such as example minimum distinguishable temperature difference MRTD of infrared thermal imaging equipment complex parameter are close Cut phase is closed, and the parameters such as MRTD that producer provides are typically all the test result in laboratory under the conditions of 20 DEG C ± 2 DEG C, to solve The same product, test result and test result consistency problem in laboratory, black according to Planck under outdoor natural temperature Body radiation law has carried out temperature-compensating, under the conditions of realizing varying environment temperature, to the target of same apparent temperature difference and Background black matrix has poor with radiation intensity identical under standard conditions.

3) dynamic compensates.For the unstable airflow influence such as wind, it is necessary to improve system robustness, be controlled needed for reaching In the case of the temperature difference, will not destruction of balance easily, the stability of the temperature difference can be kept for a long time.

Wherein, Control System Software process is as shown in Figure 10, and differential temperature survey is as shown in figure 11 with control logic.

Further, in one embodiment of the invention, target 100 and background black matrix 200 are greater than by thermal coefficient The material of first preset value is made, and appearance sprays identical preset thickness and radiance is greater than the black matrix paint of the second preset value.

Specifically, for accurate thermometric, fast regulating temperature and stablizing temperature control, target 100, background black matrix in structure 200, temperature sensing assembly 300 and temperature-controlled package 400 etc. take structure shown in Figure 12.

Be followed successively by from the front to the back in Figure 11 protective cover, radiant panel, target, background black matrix, Peltier devices, cooling fin and Fan is inlaid with temperature sensor I in target, is inlaid with temperature sensor II in background black matrix.Cooling fin and fan are used In the Joule heat for removing electric current and being generated by semiconductor devices, radiant panel is for increasing target thermal capacity, to improve target Thermal stability.

In structure, for accurate thermometric, fast regulating temperature and stablize temperature control, the embodiment of the present invention takes following technology and arranges It applies:

(1) target and background black matrix are made of the high same material of thermal coefficient, and outer surface coating thickness phase Deng black matrix paint of the same radiance close to 1.

Close fit is embedded in target and back to (2) two temperature sensors of high precision for passing through strictly to demarcate respectively In scape black matrix, and high heat conductive material is filled at gap.

(3) Peltier devices front and background black matrix contact surface, the Peltier devices back side and radiating rib contact surface, all through tight Lattice adjustment, and it is coated with highly heat-conductive material, guarantee to be in close contact, seamless connection has good heat-conductive characteristic.

(4) target and radiation contact level are also strictly merged, and are coated with highly heat-conductive material, guarantee to be in close contact, nothing Seam connection, has good heat-conductive characteristic.

(5) radiator, target and device housing are in close contact, and good heat conductive keeps target thermal capacity big, are had good Thermal stability.

(6) background black matrix and target and device housing other parts take well insulated measure, prevent heat transfer, reduce Thermal convection and heat radiation.

It is illustrated below in conjunction with working principle of the Figure 13 to the detection system of infrared thermal imaging equipment.

As shown in figure 13, the workflow of the detection system of the embodiment of the present invention includes:

Step 1: detection system powers on；

Step 2: being picked up thermal imaging equipment and powered on, and debugged and be in optimal imaging state；

Step 3: detection device sets the positive temperature difference；

Step 4: the positive temperature difference of increase and decrease detection device setting；

Step 5: observation thermal image determines whether to meet MRTD vision criterion and thens follow the steps 6 if met；Such as Fruit does not meet, and thens follow the steps 4；

Step 6: writing down MRTD⁺；

Step 7: setting subzero temperature is poor；

Step 8: the subzero temperature of increase and decrease detection device setting is poor；

Step 9: observation thermal image determines whether, meets MRTD vision criterion if met and thens follow the steps 10； If do not met, 8 are thened follow the steps；

Step 10: writing down MRTD-；

Step 11: calculating 1/2 (| MRTD⁺|+MRTD^-|)；

Step 12: detection system and being picked up infrared thermal imagery device powers down and remove receipts.

To sum up, (1) use of the embodiment of the present invention detects infrared thermal imaging equipment complex parametric technique without collimating optical system, Collimating optical system has been abandoned, structure is simplified, has reduced volume and weight, has been reduced costs, there is portability and inspection in situ Survey ability.(2) embodiment of the present invention is taken to change distance and realize stepless installation space frequency approach, by converting a fixed ruler Very little target and tested equipment distance, realizes the random fast setting of spatial frequency.(3) embodiment of the present invention is taken with general Based on bright gram of blackbody radiation law, the target and background radiation intensity of apparent temperature difference same at a temperature of varying environment is mended The method repaid makes infrared thermal imaging equipment complex parameter (such as MRTD) and the survey under standard conditions under the conditions of various natural temperatures Test result is comparable.(4) control system takes ratio-integral-differential (PID) control strategy, optimizes proportionality coefficient, product Divide coefficient and derivative time constant, keep system overshoot small, response is fast, and robustness is good.(5) it takes in structure and rationally effectively leads Heat, heat dissipation, insulated design, solve under natural temperature and windy condition, and accurate thermometric, fast regulating temperature stablize temperature control problem, real Line is showed.

To sum up, the detection system for the infrared thermal imaging equipment that the embodiment of the present invention proposes, has abandoned collimating optical system, letter Structure is changed, has reduced volume and weight, reduced costs, there is portability and in situ detection ability；Using a kind of fixed ruler Very little target, by adjusting target with picked up at a distance from infrared thermal imaging equipment, realize the arbitrarily continuous of spatial frequency and Stepless variation, various spatial frequencys needed for providing detection, and implementation can be facilitated；It is with Planck blackbody thermal radiation law Basis compensates the target and background blackbody radiation intensity of apparent temperature difference same at a temperature of varying environment, solves Same detection parameters consistency problem at a temperature of being picked up thermal imaging equipment varying environment；Take ratio-integral-differential control plan Slightly, optimization proportionality coefficient, integral coefficient and derivative time constant make to take scientific and reasonable effective thermally conductive, heat dissipation, absolutely in structure Thermal design keeps system overshoot small, and response is fast, and robustness is good, solves under natural temperature and windy condition, accurate thermometric, quickly Temperature control problem is stablized in temperature adjustment, realizes line.

Referring next to the detection method for the infrared thermal imaging equipment that attached drawing description proposes according to embodiments of the present invention.

Figure 14 is the flow chart of the detection method of the infrared thermal imaging equipment of one embodiment of the invention.

As shown in figure 14, the detection method of the infrared thermal imaging equipment, using the system of such as above-described embodiment, feature exists In, method the following steps are included:

In step sl, the Current Temperatures of target and background black matrix are acquired.

In step s 2, the Current Temperatures of background black matrix are raised and lowered.

In step s3, the Current Temperatures for adjusting background black matrix, so that the Current Temperatures in target and background black matrix are poor When consistent with the target temperature difference of setting, thermal image is generated for infrared thermal imaging equipment to be detected, to obtain according to the thermal image Testing result.

It should be noted that the explanation of the aforementioned detection system embodiment to infrared thermal imaging equipment is also applied for this The detection method of the infrared thermal imaging equipment of embodiment, details are not described herein again.

The detection method of the infrared thermal imaging equipment proposed according to embodiments of the present invention has abandoned collimating optical system, letter Structure is changed, has reduced volume and weight, reduced costs, there is portability and in situ detection ability；Using a kind of fixed ruler Very little target, by adjusting target with picked up at a distance from infrared thermal imaging equipment, realize the arbitrarily continuous of spatial frequency and Stepless variation, various spatial frequencys needed for providing detection, and implementation can be facilitated；It is with Planck blackbody thermal radiation law Basis compensates the target and background blackbody radiation intensity of apparent temperature difference same at a temperature of varying environment, solves Same detection parameters consistency problem at a temperature of being picked up thermal imaging equipment varying environment；Take ratio-integral-differential control plan Slightly, optimization proportionality coefficient, integral coefficient and derivative time constant make to take scientific and reasonable effective thermally conductive, heat dissipation, absolutely in structure Thermal design keeps system overshoot small, and response is fast, and robustness is good, solves under natural temperature and windy condition, accurate thermometric, quickly Temperature control problem is stablized in temperature adjustment, realizes line.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office It can be combined in any suitable manner in one or N number of embodiment or example.In addition, without conflicting with each other, the skill of this field Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples It closes and combines.

In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include at least one this feature.In the description of the present invention, " N number of " is meant that at least two, such as two, three Deng unless otherwise specifically defined.

Any process described otherwise above or method description are construed as in flow chart or herein, and expression includes One or it is more N number of for realizing custom logic function or process the step of executable instruction code module, segment or portion Point, and the range of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discussed suitable Sequence, including according to related function by it is basic simultaneously in the way of or in the opposite order, Lai Zhihang function, this should be of the invention Embodiment person of ordinary skill in the field understood.

Expression or logic and/or step described otherwise above herein in flow charts, for example, being considered use In the order list for the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for Instruction execution system, device or equipment (such as computer based system, including the system of processor or other can be held from instruction The instruction fetch of row system, device or equipment and the system executed instruction) it uses, or combine these instruction execution systems, device or set It is standby and use.For the purpose of this specification, " computer-readable medium ", which can be, any may include, stores, communicates, propagates or pass Defeated program is for instruction execution system, device or equipment or the dress used in conjunction with these instruction execution systems, device or equipment It sets.The more specific example (non-exhaustive list) of computer-readable medium include the following: being electrically connected with one or N number of wiring Socket part (electronic device), portable computer diskette box (magnetic device), random access memory (RAM), read-only memory (ROM), Erasable edit read-only storage (EPROM or flash memory), fiber device and portable optic disk read-only storage (CDROM).In addition, computer-readable medium can even is that the paper that can print described program on it or other suitable Jie Matter, because can then be edited, be interpreted or when necessary with other for example by carrying out optical scanner to paper or other media Suitable method is handled electronically to obtain described program, is then stored in computer storage.

It should be appreciated that each section of the invention can be realized with hardware, software, firmware or their combination.Above-mentioned In embodiment, software that N number of step or method can be executed in memory and by suitable instruction execution system with storage Or firmware is realized.Such as, if realized with hardware in another embodiment, following skill well known in the art can be used Any one of art or their combination are realized: have for data-signal is realized the logic gates of logic function from Logic circuit is dissipated, the specific integrated circuit with suitable combinational logic gate circuit, programmable gate array (PGA), scene can compile Journey gate array (FPGA) etc..

Those skilled in the art are understood that realize all or part of step that above-described embodiment method carries It suddenly is that relevant hardware can be instructed to complete by program, the program can store in a kind of computer-readable storage medium In matter, which when being executed, includes the steps that one or a combination set of embodiment of the method.

It, can also be in addition, each functional unit in each embodiment of the present invention can integrate in a processing module It is that each unit physically exists alone, can also be integrated in two or more units in a module.Above-mentioned integrated mould Block both can take the form of hardware realization, can also be realized in the form of software function module.The integrated module is such as Fruit is realized and when sold or used as an independent product in the form of software function module, also can store in a computer In read/write memory medium.

Storage medium mentioned above can be read-only memory, disk or CD etc..Although having been shown and retouching above The embodiment of the present invention is stated, it is to be understood that above-described embodiment is exemplary, and should not be understood as to limit of the invention System, those skilled in the art can be changed above-described embodiment, modify, replace and become within the scope of the invention Type.