CN209656159U - A kind of fire scene temperature field measurement device based on scanning imaging technology - Google Patents
A kind of fire scene temperature field measurement device based on scanning imaging technology Download PDFInfo
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- CN209656159U CN209656159U CN201822139802.7U CN201822139802U CN209656159U CN 209656159 U CN209656159 U CN 209656159U CN 201822139802 U CN201822139802 U CN 201822139802U CN 209656159 U CN209656159 U CN 209656159U
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Abstract
The utility model discloses a kind of fire scene temperature field measurement device and method based on scanning imaging technology, including host computer, power module, drive module, embedded processing module, optical frames, point detector array, scanning galvanometer, image-forming module and devices support structures；Described device support construction is cuboid；Described device support construction is equipped with window；The optical frames is fixed on the window by glue；The point detector array is fixed on the inner sidewall of described device support construction, positioned at the top of the window；The scanning galvanometer is fixed on inside described device support construction, and the distance of the bottom surface of described device support construction is identical at a distance from the optical frames；The image-forming module is fixed on inside described device support construction, equal with the point detector array at a distance from the surface of the scanning galvanometer, with the top surface of described device support construction.Measuring device provided by the utility model, structure is simple, easy to use.
Description
Technical field
The utility model relates to belong to temperature field measurement field, and in particular to a kind of temperature field measurement based on scanning imagery
Method and device.
Background technique
Scene of a fire situation is grasped when fire occurs to assist the design of fire control prece with assisted diagnosis fire condition, wherein
Fire scene temperature field distribution is the important parameter for reflecting scene of a fire characteristic, and one kind can be effective, quickly, accurate to measure fire scene temperature field point
The technology of cloth has important meaning for deep understanding and prevention and treatment fire.
The measurement method in temperature field mainly has contact method and two kinds of eyes with non-contact method at present.Contact method is mainly by the scene of a fire
Temperature sensing node is arranged, and the temperature information that real-time collecting node returns reconstructs fire scene temperature field, although this method result
Accurately, but sensing node predisposes to damage in the scene of a fire, and reliability is lower, and node need to be arranged in advance, for the forest fire that happens suddenly
High resolution measurement difficult to realize.Eyes with non-contact method mainly uses optical means, and typical method is the outer thermal imaging of heat.Due to object
The energy of infrared band to external radiation is different when temperature changes, therefore is detected by using infrared area array sensor single exposure
Intensity can be obtained the temperature field in visual field.Although the measurement of this scheme is convenient, due to use the absolute intensity of infrared band into
Row measurement, as a result influences vulnerable to caused by distance and flue gas scatter attenuation.On the other hand, the cost of infrared planar array detector compared with
Height, and there is lower resolution ratio compared with general visible planar array detector.
The development of colorimetric technique in recent years provides another feasible thinking.Assuming that object has grey-body radiation special
When property, the radiation spectrum of object is determined by temperature.Therefore it can be counted by comparing object in the radiation intensity of two different-wavebands
Calculate the temperature for obtaining object.Due to being calculated using the intensity of two wave bands, colorimetric method can effectively overcome absolutely
To thermometric error caused by Strength Changes, widely applied in coal stove temperature field detecting at present.But conventional colorimetric method
It needs using two-sided array detector and narrow band filter, cost is prohibitively expensive, therefore the utility model proposes use point detector
Colorimetric measurement is realized in conjunction with scanning imaging technology.
Utility model content
To solve the above-mentioned problems, a kind of fire scene temperature field measurement based on scanning imaging technology provided by the utility model
Device and method, including host computer, power module, drive module, embedded processing module, optical frames, point detector array, sweep
Retouch galvanometer, image-forming module and devices support structures；Described device support construction is cuboid；It is set in described device support construction
There is window；The optical frames is fixed on the window by glue；The point detector array is fixed on described device support knot
On the inner sidewall of structure, positioned at the top of the window；The scanning galvanometer is fixed on inside described device support construction, and described
The distance of the bottom surface apart from described device support construction of optical frames is identical；The image-forming module is fixed on described device support knot
Inside structure, at a distance from the surface of the scanning galvanometer, with the top surface of described device support construction with the point detector
Array is equal；The host computer is connect with embedded formula processing module by Ethernet；The power module and the driving mould
Block is connected with the embedded processing modular electrical, provides working power；The embedded processing module is managed by I/O respectively
Foot and coaxial cable analog signal interface are connect with the drive module and the point detector array；The scanning galvanometer and institute
State drive module connection；The drive module is connect with the motor of the scanning galvanometer, is selected according to the type of motor different
Connection type.
Further, control software is write using Visual Studio in the host computer；Controlling software includes using
Family interactive module, communication module, data processing module, spectrum calibration module and file module；The communication module with it is described embedding
Enter formula processing module to connect using TCP/IP communication.
Further, the described ± 24V interface and the drive module are by electrical connection, as driving power；It is described
5V interface is connect with the embedded processing modular electrical.
Further, the image-forming module includes amasthenic lens group, imaging lens group, balzed grating, and imaging support knot
Structure；The imaging supporting mechanism is the frame of cuboid；The balzed grating, is fixed in the imaging support construction, and described
The side wall that support construction is imaged all is in 45 ° of angles；The amasthenic lens group is fixed on the side wall of the imaging support construction, with
The balzed grating, is equidistant the top surface apart from the imaging support construction；The imaging lens group be fixed on it is described at
As support construction side wall on, positioned at the underface of the balzed grating,.
Further, the imaging lens group is located at the surface of the scanning galvanometer；The amasthenic lens group is located at
The side of the point detector array.
Further, the embedded processing module includes telecommunication circuit, signal conditioning circuit, A/D converter circuit and micro-
Processor；The telecommunication circuit uses Ethernet chip, connect with the host computer；The signal conditioning circuit passes through coaxial electrical
Cable analog signal interface is connect with the point detector array.Signal conditioning circuit improves point detector electric current letter in real time when work
Number and output voltage signal, host computer by telecommunication circuit issue instruction, microprocessor responds instruction, control A/D converter circuit open
Begin to convert, reads signal conditioning circuit output voltage and simultaneously save.
Further, the point detector array includes multiple point detectors, the arrangement side of multiple point detectors
It is consistent to the light splitting direction with the balzed grating,.
A kind of fire scene temperature field measurement device and method based on scanning imaging technology provided by the utility model obtains such as
Lower technical effect:
1, fire scene temperature is measured using eyes with non-contact method, temperature field itself will not be impacted, it will not be to equipment itself
It impacts, improves the service life of equipment.
2, using spectroscopy measurements fire scene temperature, relative to thermal infrared imager technology, absolute spoke is replaced using spectral measurement
Intensity is penetrated, the influence of distance and flue gas scatter attenuation is reduced, improves the accuracy of measurement.
3, it is measured using electric explorer array, has the advantages that height high-gain low cost.
4, measuring device structure is simple, easy to operate, carries, can make extensively in temperature field measurement field again convenient for outgoing
With.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of measuring device provided by the utility model.
Fig. 2 is the flow chart of measurement method provided by the utility model.
Fig. 3 is the light path schematic diagram of measurement method provided by the utility model.
Specific embodiment
Embodiment one
As shown in Figure 1, Figure 2 and Figure 3, a kind of fire scene temperature field based on scanning imaging technology provided by the utility model is surveyed
Measure device and method, including host computer 1, power module 2, drive module 3, embedded processing module 4, optical frames 5, point detector
Array 6, scanning galvanometer 7, image-forming module 8 and devices support structures 9；Described device support construction 9 is cuboid；Described device
Support construction 9 is equipped with window；The optical frames 5 is fixed on the window by glue；The point detector array 6 is fixed on
On the inner sidewall of described device support construction 9, positioned at the top of the window；The scanning galvanometer 7 is fixed on described device branch
Inside support structure 9, the distance of the bottom surface of described device support construction 9 is identical at a distance from the optical frames 5；The imaging mould
Block 8 is fixed on inside described device support construction 9, positioned at the surface of the scanning galvanometer 7, with described device support construction 9
Top surface distance it is equal with the point detector array 6；The host computer 1 passes through Ethernet with embedded formula processing module 4
Connection；The power module 2 is electrically connected with the scanning galvanometer 7 and the embedded processing module 4, provides working power；
The embedded processing module 4 passes through I/O pin and coaxial cable analog signal interface and the drive module 3 and institute respectively
State the connection of point detector array 6；The motor of the scanning galvanometer 7 is connect with the drive module 3.It is the host computer 1, embedded
Processing module 4, power module 2 and drive module 3 are without specific status requirement, as long as convenient for connection and being convenient between each other
It is connect with scanning galvanometer 7 and point detection array 6.
Specifically, control software is write using Visual Studio in the host computer 1；Controlling software includes
1. user interactive module: module includes that man-machine interface and logic realize two parts, for responding the input of user simultaneously
Corresponding function, such as parameter adjustment, measurement or calibration movement are run, and according to real-time measurement or reads deposit two kinds of moulds of data
The measurement result of one of formula display system.Since the temperature of scene full filed can not be obtained once for scanning imagery when real-time measurement
Degree evidence, therefore by the way of line refreshing, i.e., embedded module sends data line to host computer every time, and host computer refreshing refers to
Determine row data.Total data has been obtained when reading deposit data, can have been directly displayed, without refreshing.In order to facilitate subsequent analysis, show
Show that part need to be capable of providing the temperature data of user specified point.
2. the module communicated with the embedded processing module 4: due to needing to transmit multi-detector measurement result, data volume
It is larger, therefore ethernet communication is used between host computer 1 and embedded processing module 4, it is realized in program using socket mode
The two communication, host computer 1 play the part of role server, wait the connection request of embedded module 4, in order to guarantee the standard of data transmission
True property, is communicated using TCP/IP mode；
3. data processing module: when object meets black body radiation, radiation spectrum is
E (λ, T)=C1ε(λ,T)λ-5[exp(C2/λT)-1]-1
E (λ, T) is spectral radiance in formula, and T is radiator thermodynamic temperature, and λ is radiation wavelength, and ε (λ, T) is wavelength
The corresponding monochromatic radiance of λ, C1 and C2 are first and second radiation constant.Due to the wave band Limited Number of systematic survey, determine
In point detector quantity, it is therefore desirable to obtain temperature from the calculating of limited wave band number, the method that iteration optimization can be used carries out
It calculating, optimization aim is the similitude of the multiband light intensity of detection and the blackbody radiation spectrum of given temperature, is defined as:
Subscript i represents different wave bands in formula, and Ai and Bi are respectively i wave band actual measurement and temperature is T0When theory
The light intensity of black body radiation, A and B are respectively AiAnd BiAverage value.When assuming that temperature be consistent with actual temperature when, similitude is answered
With maximum value, 0 should be to the derivative of temperature.Assume initially that object temperature is T when optimization0, similitude is calculated to T0Derivative,
When derivative is greater than 0, increase T0, otherwise reduce T0, until the absolute value of derivative is less than presetting threshold value, temperature T at this time0
The as actual temperature of object.
4. spectrum calibration module: the initial data of the detector array 6 is endless by optical system vignetting, spectral response
The influence of the factors such as complete consistent and position installation error can not comply fully with blackbody radiation law, need to demarcate before measuring and be
It unites and saves parameter, need to provide accurate temperature input interface in software, according to the temperature computation radiation spectrum of input, and use light
The intensity for composing corresponding wave band corrects the measurement result of each detector, and corresponding correction factor saves as Parameter File for making later
With；
5. file module: saving measurement result in real time, the temperature field image of reconstruct directly can be saved as JPG format chart
Piece, while can be reserved for the spectrum and temperature data of each point, it is used for subsequent analysis.
Specifically, the power module 2 includes ± 24V interface and 5V interface；± 24V the interface and the drive module
Scanning galvanometer 77 is electrically connected, as driving power；The 5V interface and the embedded processing module 4 are electrically connected.
Specifically, the image-forming module 8 includes amasthenic lens group 81, imaging lens group 82, balzed grating, 83 and imaging branch
Support structure 84；The imaging supporting mechanism 84 is the frame of cuboid；The balzed grating, 83 is fixed on the imaging support knot
On structure 84, the side wall with the imaging support construction 84 is all in 45 ° of angles；The amasthenic lens group 81 is fixed on the imaging
On the side wall of support construction 84, with the balzed grating, 83 being equidistant in the top surface apart from the imaging support construction 84；
The imaging lens group 82 is fixed on the side wall of the imaging support construction 84, positioned at the underface of the balzed grating, 83.
Specifically, the imaging lens group 82 is located at the surface of the scanning galvanometer 7；The amasthenic lens group 81 is located at
The side of the point detector array 6.Limited remote scene point collimation is become directional light by imaging lens group 82, is incident to glittering
Grating 83.Compared to common grating, balzed grating, 83 has higher energy efficiency.Due to the dispersion interaction of balzed grating, 83, no
The incident beam of co-wavelength has different shooting angles, is focused lens group 81 and converges on point detector array 6, therefore every
A point detector can measure the intensity of corresponding wave band converged light.
Specifically, 4 module of embedded processing includes telecommunication circuit, signal conditioning circuit, A/D converter circuit and Wei Chu
Manage device；The telecommunication circuit uses Ethernet chip, connect with the host computer；The signal conditioning circuit passes through coaxial cable
Analog signal interface is connect with the point detector array.Communications portion uses dedicated ethernet chip, such as DM9000.Signal tune
Reason circuit is used to amplify the electric signal of point detector acquisition, improves signal quality.A/D converter circuit need to realize multichannel mould simultaneously
Quasi- number conversion, the ADS8568 chip that Texas Instruments may be selected are realized.Microprocessor uses common STM32 system
Column single-chip microcontroller, such as STM32F767IGT6.Signal conditioning circuit improves each point detector current signal simultaneously in real time when work
Output voltage signal, host computer 1 are issued by telecommunication circuit and are instructed, and microprocessor responds instruction, control A/D converter circuit starts
Conversion is read signal conditioning circuit output voltage and is saved.
Specifically, the point detector array 6 include multiple point detectors, the orientation of multiple point detectors with
The light splitting direction of the balzed grating, 83 is consistent.Point detector array 6 is made of at least two point detector, each point detection
The spectral response range of device need to reach near infrared region, and cutoff wavelength is higher than 1.6 μm, and the indium gallium arsenic of Bin Song company, Japan can be used
PIN photodiode G6854-01.Between point detector at a distance, each detector measurement correspond to wave band radiation it is strong
Degree, the position precision of point detector are determined by mechanical structure precision.
Specifically, scanning galvanometer 7 has the function of two-dimensional scanning, the angle position by changing two reflecting optics can be real
Now to any point location of scene in field range, so that the spectral information of imaging system shooting specified point.The drive module 3
The instruction that can receive embedded processing module 4 provides number or analog drive signal and carries out continuous to the scanning galvanometer 7 and determine
Position movement.In order to reduce cost, commercialization scanning galvanometer and drive system used in laser-processing system can be used, such as Eurasia is swashed
The M series galvanometer of light.
A kind of fire scene temperature field measurement method based on scanning imaging technology, based on above-mentioned measuring device, including it is following
Step:
SP1: measurement blackbody furnace brings the actual temperature of blackbody furnace into following equation:
E (λ, T)=C1ε(λ,T)λ-5[exp(C2/λT)-1]-1
The intensity for calculating the correspondence wave band of each point detector, then does theoretical radiation intensity and actual detection intensity
Comparison, obtains the correction factor of each point detector, and save correction factor.
SP2: starting host computer 1 inputs instruction starting software by user interactive module, is passed instruction by communication module
It send to embedded processing module, instruction is sent to drive module by embedded processing module, and drive module driving scanning galvanometer is opened
Begin to scan；
SP3: scanning galvanometer 7 is often moved to a position, and infrared light reaches imaging lens group by scanning galvanometer 7, then
It is irradiated to after light splitting by balzed grating, or so in amasthenic lens group；Amasthenic lens group is irradiated to a detection after focusing light beam
On device array；Embedded processing module extracts the measurement analog quantity of each point detector, and will be simulated by AD conversion circuit
Amount saves after being converted to digital quantity；When scanning galvanometer complete a line scanning after, it is embedded come out module by the row data by with
Too network interface is transmitted to host computer；
SP4: host computer uses following equation to the multi-channel data of each point
Optimization, obtains the temperature of the point；Refresh display interface after the completion of every data line processing；User clicks image in real time
Obtain the temperature and light intensity data of each point.
SP5: step SP3 and SP4 are repeated, the scanning work of all rows is completed, produces the thermo parameters method of entire scene.
As shown in Fig. 2, the step of operation and operation are as follows: start the host computer 1 and software, operator's input
Instruction transfers the instructions to the embedded processing module 4 by user interactive module, and the embedded processing module 4 controls
It transmits instructions in the drive module 3；The drive module 3 drives the scanning galvanometer 7 to start to work.Scanning galvanometer 7
It is often moved to a position, infrared light reaches imaging lens group by scanning galvanometer 7, then passes through the light splitting or so of balzed grating,
After be irradiated in amasthenic lens group；Amasthenic lens group is irradiated on point detector array after focusing light beam；Embedded processing mould
Signal conditioning circuit improves each point detector current signal and output voltage signal in real time in block 4, and host computer 1 passes through communication
Circuit issues instruction, microprocessor responds instruction, and control A/D converter circuit starts to convert, and reads signal conditioning circuit output voltage
And the measurement analog quantity for extracting each point detector is saved, and protect after analog quantity is converted to digital quantity by A/D converter circuit
It deposits；After scanning galvanometer completes a line scanning, the row data are transmitted to upper by embedded module out by Ethernet interface
Machine.All rows are scanned in the manner described above, then generate the temperature distribution image of this scene.Operator can it is described again on
The temperature of each point is seen on the display screen of position machine 1, and can click the temperature for checking each point.
It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and
And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms
Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new
The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in
All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting
Related claim.
Claims (7)
1. a kind of fire scene temperature field measurement device based on scanning imaging technology, it is characterised in that: including host computer, power supply mould
Block, drive module, embedded processing module, optical frames, point detector array, scanning galvanometer, image-forming module and device support knot
Structure；Described device support construction is cuboid；Described device support construction is equipped with window；The optical frames is fixed by glue
On the window；The point detector array is fixed on the inner sidewall of described device support construction, positioned at the window
Top；The scanning galvanometer is fixed on inside described device support construction, the described device support knot at a distance from the optical frames
The distance of the bottom surface of structure is identical；The image-forming module is fixed on inside described device support construction, positioned at the scanning galvanometer
It is equal with the point detector array at a distance from surface, with the top surface of described device support construction；The host computer with it is embedded
Enter formula processing module to connect by Ethernet；The power module and the drive module and the embedded processing module connect
It connects, working power is provided；The embedded processing module pass through respectively I/O pin and coaxial cable analog signal interface with it is described
Drive module is connected with the point detector array；The scanning galvanometer is connect with the drive module.
2. a kind of fire scene temperature field measurement device based on scanning imaging technology according to claim 1, it is characterised in that: institute
Control software in host computer is stated to write using Visual Studio；Controlling software includes user interactive module, communication module, number
According to processing module, spectrum calibration module and file module；The communication module and the embedded processing module use TCP/IP
Communication connection.
3. a kind of fire scene temperature field measurement device based on scanning imaging technology according to claim 1, it is characterised in that: institute
Stating power module includes ± 24V interface and 5V interface；± 24V the interface is connect with the drive module, as driving power；
The 5V interface is connect with the embedded processing module.
4. a kind of fire scene temperature field measurement device based on scanning imaging technology according to claim 1, it is characterised in that: institute
Stating image-forming module includes amasthenic lens group, imaging lens group, balzed grating, and imaging support construction；The imaging supporting mechanism is
The frame of cuboid；The balzed grating, is fixed in the imaging support construction, all with the side wall that support construction is imaged
In 45 ° of angles；The amasthenic lens group is fixed on the side wall of the imaging support construction, with the balzed grating, apart from institute
State being equidistant for the top surface of imaging support construction；The imaging lens group is fixed on the side wall of the imaging support construction,
Positioned at the underface of the balzed grating,.
5. a kind of fire scene temperature field measurement device based on scanning imaging technology according to claim 4, it is characterised in that: institute
State the surface that imaging lens group is located at the scanning galvanometer；The amasthenic lens group is located at the one of the point detector array
Side.
6. a kind of fire scene temperature field measurement device based on scanning imaging technology according to claim 1, it is characterised in that: institute
Stating embedded processing module includes telecommunication circuit, signal conditioning circuit, A/D converter circuit and microprocessor；The telecommunication circuit is adopted
With Ethernet chip, it is connect with the host computer；The signal conditioning circuit by coaxial cable analog signal interface with it is described
The connection of point detector array；Signal conditioning circuit improves point detector current signal and output voltage signal in real time when work, on
Position machine is issued by telecommunication circuit and is instructed, and microprocessor responds instruction, control A/D converter circuit starts to convert, and reads signal condition
Circuit output voltage simultaneously saves.
7. a kind of fire scene temperature field measurement device based on scanning imaging technology according to claim 4, it is characterised in that: institute
Stating point detector array includes multiple point detectors, the orientation of multiple point detectors and the light splitting of the balzed grating,
Direction is consistent.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109443546A (en) * | 2018-12-19 | 2019-03-08 | 南京森林警察学院 | A kind of fire scene temperature field measurement device and method based on scanning imaging technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109443546A (en) * | 2018-12-19 | 2019-03-08 | 南京森林警察学院 | A kind of fire scene temperature field measurement device and method based on scanning imaging technology |
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Address after: Road in Qixia District of Nanjing City, Jiangsu Province, No. 28 210023 Patentee after: NANJING FOREST POLICE College Address before: No.28, Wenlan Road, Xianlin University City, Taizhou City, Jiangsu Province Patentee before: NANJING FOREST POLICE College |
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