CN207751604U - A kind of revolving part temperature measuring equipment based on thermochromic liquid crystal - Google Patents
A kind of revolving part temperature measuring equipment based on thermochromic liquid crystal Download PDFInfo
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- CN207751604U CN207751604U CN201820041858.6U CN201820041858U CN207751604U CN 207751604 U CN207751604 U CN 207751604U CN 201820041858 U CN201820041858 U CN 201820041858U CN 207751604 U CN207751604 U CN 207751604U
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- liquid crystal
- revolving part
- thermochromic liquid
- derotator
- filming apparatus
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Abstract
The utility model provides a kind of revolving part temperature measuring equipment based on thermochromic liquid crystal.Filming apparatus is arranged in the thermochromic liquid crystal film on revolving part surface by derotator shooting, signal processing apparatus analyzes the static thermochromic liquid crystal collection of illustrative plates that filming apparatus obtains, and then revolving part surface temperature field data is exported, realize revolving part surface temperature field visualization process.The utility model includes main shaft, spring bearing, revolving part, thermochromic liquid crystal film, derotator, filming apparatus, signal processing apparatus, heating device and motor and transmission device.The utility model uses non-contact measurement, test specimen structure and flow field property are not influenced, high-resolution and continuous temperature field data can be exported, suitable for the revolving part that surface is plane or complex geometry curved surface, have reaction speed fast simultaneously, display characteristic is good, and spatial resolution is high, it is reusable the advantages that.
Description
Technical field
The utility model is related to revolving part surface temperature measurement field, more particularly to a kind of revolving part based on thermochromic liquid crystal
Temperature measuring equipment.
Background technology
Rotating machinery is widely used in the departments such as electric power, petrochemical industry, metallurgy and aerospace.Typical rotating machinery has vapour
Turbine, gas turbine, centrifugal and Axial Flow Compressor, wind turbine, pump, the hydraulic turbine, generator and aero-engine etc..Revolving part
It is rotating machinery element a kind of of crucial importance and universal.With the raising of rotating machinery designing technique and the hair of verification experimental verification
The experimental study of exhibition, rotary part heat exchange and flow behavior is more and more extensive and gos deep into, and obtaining surface of revolution Temperature Distribution is
Study the basis of rotary part heat exchange and flow behavior.
Revolving part thermometric is relatively difficult, and Major Difficulties have：First is difficult to arrange temperature measuring device on rotating member, and obtains
The process of data is more difficult；The second face temperature for being difficult to realize revolving part measures；Third precision under conditions of rotation hardly results in
Ensure.
Both at home and abroad in the prior art, for revolving part surface temperature distribution measurement mainly use thermocouple, temperature indicating paint and
The methods of thermal infrared imager.Thermocouple temperature measurement method is to measure different half using a series of thermocouples arranged along revolving part radius
Discrete point Temperature Distribution at diameter, to obtain Temperature Distribution as precisely as possible, it is necessary to arrange temperature measuring point as much as possible,
This, which not only increases, measures difficulty, but also can not obtain totally continuous thermo parameters method；It can be connected using temperature indicating paint thermometric
Continuous thermo parameters method, but the variation of temperature indicating paint is irreversible, can not be reused, and each thermometric is required for rearranging new
Temperature indicating paint, the complexity of increased experiment；Infrared temperature-test technology measures high speed rotation panel surface temperature, and there are difficult to install etc.
Problem, and the temperature for not being suitable for high speed rotation part measures.
Wherein, thermochromic liquid crystal use principle is：Thermochromic liquid crystal material can variation with temperature and rapidly change its reflected light
Color, and it reflects light color with temperature into single mapping relationship, therefore under certain experimental method guidance, filled by shooting
The method that is combined with computer digital image technique is set to be acquired and handle liquid crystal color image, model surface can be measured
Continuous temperature and hot-fluid field distribution.
Derotator can capture the freeze frame of high speed rotation structure, be commonly applied to height as a kind of new flash ranging means
In deformation, vibration and the measurement of flow field structure of fast rotational structure.Derotator use principle is：If object is motionless, when derotator rib
When mirror is rotated with angular velocity omega, image will be rotate in same direction with the angular speed of 2 ω.Therefore when object is rotated with angular velocity omega, if
Make to disappear and turn prism and rotated backward for ω/2 with its coaxial but angular speed, then image at this moment remains static.
Utility model content
In order to avoid the shortcomings of the prior art, the utility model proposes a kind of revolving part thermometric based on thermochromic liquid crystal
Device can obtain revolving part high-resolution and continuous temperature field data.
To achieve the above object, the utility model adopts the following technical solution：
A kind of revolving part temperature measuring equipment based on thermochromic liquid crystal, including revolving part, connect with revolving part and drive its rotation
Main shaft, the motor for main shaft powered rotation and transmission device, heating rotary member heating device, be set to revolving part table
The thermochromic liquid crystal film in face, image derotator, filming apparatus, the signal processing apparatus being electrically connected with filming apparatus；Described image
Derotator is set between thermochromic liquid crystal film and filming apparatus, and the light entrance of image derotator faces thermochromic liquid crystal film, image
The observation panel of derotator faces the camera of filming apparatus；Disappear in adjustment derotator and turn the rotating speed of prism so that disappears through image
Turn the thermochromic liquid crystal film that the observation panel of instrument is observed to remain static；Filming apparatus is shot by the observation panel of image derotator
The liquid crystal collection of illustrative plates of thermochromic liquid crystal film, and liquid crystal collection of illustrative plates is sent to signal processing apparatus, signal processing apparatus is according to thermochromic liquid crystal
Correspondence between color and temperature handles the liquid crystal collection of illustrative plates shot, and then exports continuous temperature field data.
Further, the heating device is using air-flow heating, electrical heating or radiant heating.
Further, the arrangement of the thermochromic liquid crystal film be it is band-like arrange, be circular layout, sheet arrangement or sector cloth
It sets.
Further, the revolving part surface is planar structure or curved-surface structure.
Revolving part temp measuring method based on above-mentioned apparatus, includes the following steps：
Step 1：Motor and the rotation of actuator drives main shaft, main shaft drive revolving part rotation, heating devices heat rotation
Part；
Step 2：After revolving part stabilization of speed, disappears in adjustment image derotator and turn the rotating speed of prism so that disappear through image
Turn the thermochromic liquid crystal film that the observation panel of instrument is observed to remain static；
Step 4：Filming apparatus shoots the liquid crystal collection of illustrative plates of thermochromic liquid crystal film by the observation panel of image derotator, then by liquid
Brilliant collection of illustrative plates is sent to signal processing apparatus；
Step 5：Signal processing apparatus is according to the correspondence between thermochromic liquid crystal color and temperature to the liquid crystal shot
Collection of illustrative plates is handled, and then exports continuous temperature field data.
Advantageous effect：(1) non-contact measurement：Test specimen structure and flow field property are not influenced；(2) reaction speed is fast：
The time of optical signal temperature hysteresis variation is extremely short；(3) display characteristic is good：In complicated temperature field, it can show from red
To the entire visible light color of purple, corresponding temperature resolution is higher；(4) spatial resolution is high；(5) it is fixed to provide
Determination data is measured, keeps revolving part surface temperature field visualized, and obtain totally continuous Temperature Distribution on revolving part；(6) liquid crystal
Thermocolour display characteristic variation with temperature there is invertibity, the device is reusable；(7) image stabilization：Pass through derotator
Shooting revolving part and thermochromic liquid crystal can get static image photo；(8) it is plane or complex geometry curved surface to be suitable for surface
Revolving part, and without installing sensor, reduce the difficulty of design processing installation.
Description of the drawings
Fig. 1 is a kind of characterization schematic diagram of revolving part temperature measuring equipment and method based on thermochromic liquid crystal of the utility model.
Figure label：1. main shaft；2. spring bearing；3. revolving part；4. thermochromic liquid crystal film；5. image derotator；6. shooting
Device；7. signal processing apparatus；8. heating device；9. motor and transmission device.
Specific implementation mode
The utility model is further described below in conjunction with the accompanying drawings.
As shown in Figure 1, the utility model includes heating device 8, motor and transmission device 9, spring bearing 2, revolving part 3,
Thermochromic liquid crystal film 4, image derotator 5, filming apparatus 6, signal processing apparatus 7.
Wherein, each component mounting means is as follows in the utility model：Revolving part 3, motor and transmission device 9 and spring bearing
2 are mounted on main shaft 1；Spring bearing 2 is to supports main shaft 1；Motor and transmission device 9 make rotation by driving spindle 1
Part 3 rotates；Heating device 8 is connect with revolving part 3, can heating rotary member 3 by heating device 8；Thermochromic liquid crystal film 4 is arranged in rotation
Turn 3 surface of part, and thermochromic liquid crystal film 4 is in direct contact with 3 surface of revolving part；Image derotator 5 is used as viewing tool, is arranged in rotation
Turn between part 3 and filming apparatus 6, and suitable spacing is kept with revolving part 3, and the spacing should make observer by image can disappear to turn
Instrument 5 observes clear and complete thermochromic liquid crystal film 4；Filming apparatus 6 be used as shooting tool, be arranged in image derotator 5 it
Afterwards, and with revolving part 3 and image derotator 5 suitable spacing is kept, which should make photographer can be by filming apparatus 6 through figure
As derotator 5 shoots the static thermochromic liquid crystal collection of illustrative plates of complete display；Filming apparatus 6 is connected to signal processing apparatus 7, shooting dress
Signal processing apparatus 7 can be transferred to by setting the thermochromic liquid crystal collection of illustrative plates shot.
The implementation of the utility model is as follows：Revolving part 3 obtains rotary speed by motor and transmission device 9, passes through
Heating device 8 can heating rotary member, make its temperature field that corresponding variation occur；Thermochromic liquid crystal film 4 is arranged in 3 surface of revolving part,
And generate color change with 3 temperature change of revolving part；After 3 stabilization of speed of revolving part, observer can adjust in image derotator 5
Disappear and turn the rotating speed of prism, concrete operations details is：When revolving part is rotated with angular velocity omega, adjustment image derotator 5 makes to disappear
Turn prism to rotate backward for ω/2 with its coaxial but angular speed, after correct adjustment image derotator 5, can pass through image derotator 5
It observes the thermochromic liquid crystal film 4 to remain static, while also can observe thermochromic liquid crystal according to thermochromic liquid crystal film color change
4 temperature changing trend of film, by filming apparatus 6 can captured in real-time liquid crystal collection of illustrative plates, the liquid crystal collection of illustrative plates obtained by filming apparatus 6 is defeated
Enter to signal processing apparatus 7, signal processing apparatus 7 is according to the correspondence between thermochromic liquid crystal color and temperature to shooting
Liquid crystal image is handled, and then exports high-resolution and continuous temperature field data.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these improve and
Retouching also should be regarded as the scope of protection of the utility model.
Claims (4)
1. a kind of revolving part temperature measuring equipment based on thermochromic liquid crystal, which is characterized in that even including revolving part (3), with revolving part (3)
Connect and drive main shaft (1), the motor and transmission device (9), heating rotary member for main shaft (1) powered rotation that it is rotated
(3) heating device (8), thermochromic liquid crystal film (4), image derotator (5), the filming apparatus for being set to revolving part (3) surface
(6), the signal processing apparatus (7) being electrically connected with filming apparatus (6)；Described image derotator (5) is set to thermochromic liquid crystal film
(4) between filming apparatus (6), the light entrance of image derotator (5) faces thermochromic liquid crystal film (4), image derotator (5)
Observation panel faces the camera of filming apparatus (6)；Disappear in adjustment derotator (5) and turn the rotating speed of prism so that disappears through image and turn
The thermochromic liquid crystal film (4) that the observation panel of instrument (5) is observed remains static；Filming apparatus (6) passes through image derotator (5)
Observation panel shoots the liquid crystal collection of illustrative plates of thermochromic liquid crystal film (4), and liquid crystal collection of illustrative plates is sent to signal processing apparatus (7), signal processing
Device (7) is analyzed and is handled to liquid crystal collection of illustrative plates according to the correspondence between thermochromic liquid crystal color and temperature, and then is exported
Continuous temperature field data.
2. a kind of revolving part temperature measuring equipment based on thermochromic liquid crystal according to claim 1, which is characterized in that the heating
Device (8) is using air-flow heating, electrical heating or radiant heating.
3. a kind of revolving part temperature measuring equipment based on thermochromic liquid crystal according to claim 1, which is characterized in that the thermocolour
The arrangement of liquid crystal film (4) is band-like arrange, be circular layout, sheet arrangement or fan-shaped arranging.
4. a kind of revolving part temperature measuring equipment based on thermochromic liquid crystal according to claim 1, which is characterized in that the rotation
Part (3) surface is planar structure or curved-surface structure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820041858.6U CN207751604U (en) | 2018-01-11 | 2018-01-11 | A kind of revolving part temperature measuring equipment based on thermochromic liquid crystal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820041858.6U CN207751604U (en) | 2018-01-11 | 2018-01-11 | A kind of revolving part temperature measuring equipment based on thermochromic liquid crystal |
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| CN207751604U true CN207751604U (en) | 2018-08-21 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108303194A (en) * | 2018-01-11 | 2018-07-20 | 南京航空航天大学 | A kind of revolving part temperature measuring equipment and method based on thermochromic liquid crystal |
| CN111416965A (en) * | 2020-05-15 | 2020-07-14 | 深圳金三立视频科技股份有限公司 | Anti-icing video device |
| CN112785984B (en) * | 2019-11-08 | 2021-12-10 | 南京航空航天大学 | LCD high-efficiency self-adaptive global backlight adjusting method for image gray level perception |
-
2018
- 2018-01-11 CN CN201820041858.6U patent/CN207751604U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108303194A (en) * | 2018-01-11 | 2018-07-20 | 南京航空航天大学 | A kind of revolving part temperature measuring equipment and method based on thermochromic liquid crystal |
| CN112785984B (en) * | 2019-11-08 | 2021-12-10 | 南京航空航天大学 | LCD high-efficiency self-adaptive global backlight adjusting method for image gray level perception |
| CN111416965A (en) * | 2020-05-15 | 2020-07-14 | 深圳金三立视频科技股份有限公司 | Anti-icing video device |
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