CN103006186B - Automatic verification device and method for color-changing thermometers - Google Patents
Automatic verification device and method for color-changing thermometers Download PDFInfo
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- CN103006186B CN103006186B CN201310002092.2A CN201310002092A CN103006186B CN 103006186 B CN103006186 B CN 103006186B CN 201310002092 A CN201310002092 A CN 201310002092A CN 103006186 B CN103006186 B CN 103006186B
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- 238000012795 verification Methods 0.000 title claims abstract description 11
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Abstract
The invention discloses an automatic verification device and a method for color-changing thermometers. A fixing device and a magnet are used for fixing a plurality of color-changing thermometers to be verified; a driver is mounted on the fixing device; the fixing device is placed above a standard verification temperature field; the controller is connected with the driver and a computer; a standard temperature meter is inserted in the standard verification temperature field; a secondary instrument, the computer and the standard temperature meter are connected; a CCD (charge coupled device) camera is connected with the computer through an image acquisition card. When the thermometers to be verified are lifted up from the standard verification temperature field, the CCD camera can collect images in color-changing light spot ranges of the thermometers to be verified, the image acquisition card converts collected analog image signals into digital signals and sends the signals to the computer, and the computer treats the images and obtains the temperature measuring values of the thermometers to be verified through calculation; and the temperature measuring values obtained through calculation are compared with a standard temperature value, and then a qualification or disqualification prompt can be given. The device and the method have the advantage that the verification work efficiency and the verification accuracy of color-changing thermometers can be improved.
Description
Technical field
The present invention relates to a kind of automatic calibrator and method of thermometer, particularly relate to a kind of automatic calibrator and method of discoloring temperature meter.
Background technology
Discoloring temperature meter is a kind of thermo-chromic effect of utilizing cholesteryl liquid crystal, by the variation of change color displays temperature directly perceived.This clinical thermometer need not whipping, automatically restore, room temperature storage, can Reusability for same person, and having avoided the adverse effect of fragmentation to consumer health and the harm to ecological environment due to mercury clinical thermometer, is the environment-friendly type body temperature card of house and hospital's first-selection.Fig. 1 is that discoloring temperature meter temperature reads schematic diagram, and round dot represents variable color luminous point, in the time that discoloring temperature meter is placed in room temperature, variable color luminous point is all green, when discoloring temperature instrumentation temperature is after 2 minutes, part variable color luminous point can become black, the number reaction temperature value that black variable color light is counted out.As shown in Figure 1, when discoloring temperature meter variable color luminous point is as shown in the figure time, the temperature value that clinical thermometer is corresponding so should be 36.6 DEG C to example.
Black variable color luminous point keeps all automatically reseting to green after 30 seconds.At present, for the calibrating of discoloring temperature meter, be all generally to adopt artificial or automanual method, also there is not the automatic verification system about discoloring temperature meter.
Summary of the invention
The object of the present invention is to provide a kind of assay device and method of discoloring temperature meter, use machine vision theory, solved in the different variable color luminous point of discoloring temperature meter demonstration situation, realize that discoloring temperature meter temperature value reads, the automatization of error analysis.
To achieve these goals, the present invention adopts following technical scheme:
1, a kind of automatic calibrator of discoloring temperature meter:
The present invention includes fixture, Magnet, computer, controller, driver, standard test temperature field, normal thermometer, secondary meter, CCD camera, lighting source, zoom enlarging lens and image pick-up card, fixture and Magnet are for fixing branched discoloring temperature meter to be checked, branched discoloring temperature meter to be checked is all on a horizontal plane, installation of driver above fixture, fixture is placed on top, standard test temperature field, one end of controller is connected with driver, the other end of controller is connected with computer, normal thermometer inserts in standard test temperature field, the two ends of secondary meter are connected with computer and normal thermometer respectively, zoom enlarging lens on CCD camera and lighting source are all aimed at branched discoloring temperature meter to be checked, CCD camera is connected with computer through image pick-up card.
2, a kind of calibration method of discoloring temperature meter:
Driver is controlled by the controller, the discoloring temperature meter to be checked being contained in fixture and Magnet is put into standard test temperature field, branched discoloring temperature meter to be checked all, in same level, ensures that each discoloring temperature meter variable color light point range to be checked is immersed in proving temperature field, the standard temperature value in standard test temperature field is recorded by normal thermometer and secondary meter, discoloring temperature meter to be checked is in standard test temperature field after at least 2 minutes, driver is mentioned the discoloring temperature meter to be measured in fixture from proving temperature field, make the image of CCD collected by camera to variable color light point range in multiple discoloring temperature meters to be checked, image pick-up card by CCD collected by camera to analog picture signal be converted to digital data transmission to computer, the temperature value of discoloring temperature meter to be checked is processed and calculated to the image of the variable color luminous point situation of computer to the discoloring temperature meter to be checked getting, by the temperature value obtaining after calculating and the contrast of standard temperature value, what coincidence loss required provides qualified prompting, do not meet the defective prompting of providing of error requirements.
Described driver is lifted to the image acquisition terminal procedure used time by the discoloring temperature meter to be checked in fixture from thermostatic water bath and is no more than 30 seconds.
The temperature value of described calculating discoloring temperature meter to be checked, comprises the following steps:
1) because CCD camera once collects the information of multiple discoloring temperature meters to be checked, first, image positioned and cut apart according to the arrangement feature of discoloring temperature meter to be checked, being divided into multiple ROI, i.e. area-of-interest;
2) the ROI image after cutting apart is carried out to gray processing, image is converted into the single channel gray level image of eight, the image after gray processing is carried out to medium filtering, remove the noise in image;
3) adopt the mode of adaptive threshold to carry out binaryzation to image, be divided into the round dot of black in image;
4) adopt the mode of traverse scanning to complete the statistics that dark circles is counted out, statistical number is N;
5) set up the count out corresponding relation of N and discoloring temperature meter temperature measured value T of dark circles:
Finally calculate discoloring temperature instrumentation and obtain temperature value T according to the dark circles N that counts out.
The beneficial effect that the present invention has is:
The present invention, by the temperature measured value obtaining after calculating and the contrast of standard temperature value, provides qualified and defective prompting, improves the accuracy of discoloring temperature meter calibration operation efficiency and calibrating.
Brief description of the drawings
Fig. 1 is that discoloring temperature meter temperature reads schematic diagram.
Fig. 2 is automatic calibrator schematic diagram of the present invention.
In figure: 1, discoloring temperature meter to be checked, 2, fixture, 3, computer, 4, controller, 5, driver, 6, standard test temperature field, 7, normal thermometer, 8, secondary meter, 9, CCD camera, 10, lighting source, 11, zoom enlarging lens, 12, image pick-up card, 13, Magnet.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
As shown in Figure 2, the present invention includes fixture 2, computer 3, controller 4, driver 5, standard test temperature field 6, normal thermometer 7, secondary meter 8, CCD camera 9, lighting source 10, zoom enlarging lens 11, image pick-up card 12 and Magnet 13, fixture 2 and Magnet 13 are fixed with branched discoloring temperature meter 1 to be checked, branched discoloring temperature meter 1 to be checked is all on a horizontal plane, fixture 2 installation of driver 5 above, fixture 2 is placed on 6 tops, standard test temperature field, one end of controller 4 is connected with driver 5, the other end of controller 4 is connected with computer 3, normal thermometer 7 inserts in standard test temperature field 6, the two ends of secondary meter 8 are connected with computer 3 and normal thermometer 7 respectively, zoom enlarging lens 11 on CCD camera 9 and lighting source 10 are all aimed at branched discoloring temperature meter 1 to be checked, CCD camera 9 is connected with computer 3 through image pick-up card 12.
As shown in Figure 2, further illustrate discoloring temperature meter calibration method work process, start standard test temperature field 6, established standards proving temperature field 6 temperature, after standard test temperature field 6 is stable, manually branched discoloring temperature meter 1 is installed on to fixture 2 places and utilizes Magnet 13 fixing, calibrating starts, computer 3 sends and starts calibrating signal to controller 4, controller 4 is if PLC control driver 5 is as motor, driver 5 drives fixture 2 to move to calibrating position, be fixed device 2 and Magnet 13 of discoloring temperature meter 1 to be checked is brought in standard test temperature field 6, the standard temperature value in standard test temperature field 6 is recorded by normal thermometer 7 as second-class standard platinum resistance and secondary meter 8 as six and half circuit tester Agilent34401, discoloring temperature meter 1 is in standard test temperature field after 6 at least 2 minutes, fixture 2 and Magnet 13 propose discoloring temperature meter 1 from standard test temperature field 6, CCD camera 9 can photograph the image of the variable color light point range of branched discoloring temperature meter simultaneously, under the illumination of lighting source 10, utilize zoom enlarging lens 11, gather branched discoloring temperature meter 1 variable color light point range image by video camera 9, this analog picture signal is passed to computer 3 after image pick-up card 12 conversions, computer positions the data image signal receiving, cut apart, filtering, after binaryzation, according to the count out corresponding relation of N and discoloring temperature meter temperature measured value T of dark circles:
The number of counting by black variable color light calculates discoloring temperature meter measured temperature value, then measured temperature value and standard temperature value are compared, and the verification result that exceeds error requirements is defective, and the verification result that does not exceed error requirements is qualified.
Claims (1)
1. the automatic Verification method of a discoloring temperature meter, the method is by being used a kind of automatic calibrator of discoloring temperature meter, and this device comprises fixture (2), Magnet (13), computer (3), controller (4), driver (5), standard test temperature field (6), normal thermometer (7), secondary meter (8), CCD camera (9), lighting source (10), zoom enlarging lens (11) and image pick-up card (12), fixture (2) and Magnet (13) are for fixing branched discoloring temperature meter to be checked (1), branched discoloring temperature meter to be checked (1) is all on a horizontal plane, fixture (2) is installation of driver (5) above, fixture (2) is placed on top, standard test temperature field (6), one end of controller (4) is connected with driver (5), the other end of controller (4) is connected with computer (3), normal thermometer (7) inserts in standard test temperature field (6), the two ends of secondary meter (8) are connected with computer (3) and normal thermometer (7) respectively, zoom enlarging lens (11) and lighting source (10) on CCD camera (9) are all aimed at branched discoloring temperature meter to be checked (1), CCD camera (9) is connected with computer (3) through image pick-up card (12),
Driver drives fixture, the ferropectic discoloring temperature meter to be checked of device and magnetic that will be fixed is put into standard test temperature field, branched discoloring temperature meter to be checked all, in same level, ensures that each discoloring temperature meter variable color light point range to be checked is immersed in proving temperature field, the standard temperature value in standard test temperature field is recorded by normal thermometer, discoloring temperature meter to be checked is in standard test temperature field after at least 2 minutes, driver drives fixture, discoloring temperature meter to be checked is mentioned from proving temperature field, make the image of CCD collected by camera to variable color light point range in multiple discoloring temperature meters to be checked, image pick-up card by CCD collected by camera to analog picture signal be converted to digital data transmission to computer, the temperature value of discoloring temperature meter to be checked is processed and calculated to the image of the variable color light point range of computer to the discoloring temperature meter to be checked getting, by the temperature value obtaining after calculating and the contrast of standard temperature value, what coincidence loss required provides qualified prompting, do not meet the defective prompting of providing of error requirements,
Described driver is lifted to the image acquisition terminal procedure used time by the discoloring temperature meter to be checked in fixture from thermostatic water bath and is no more than 30 seconds;
The temperature value that it is characterized in that described calculating discoloring temperature meter to be checked, comprises the following steps:
1) because CCD camera once collects the information of multiple discoloring temperature meters to be checked, first, image positioned and cut apart according to the arrangement feature of discoloring temperature meter to be checked, being divided into multiple ROI, i.e. area-of-interest;
2) the ROI image after cutting apart is carried out to gray processing, image is converted into the single channel gray level image of eight, the image after gray processing is carried out to medium filtering, remove the noise in image;
3) adopt the mode of adaptive threshold to carry out binaryzation to image, be divided into the round dot of black in image;
4) adopt the mode of traverse scanning to complete the statistics that dark circles is counted out, statistical number is N;
5) set up the count out corresponding relation of N and discoloring temperature meter temperature measured value T of dark circles:
Finally calculate discoloring temperature instrumentation and obtain temperature value T according to the dark circles N that counts out.
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| CN201310002092.2A CN103006186B (en) | 2013-01-05 | 2013-01-05 | Automatic verification device and method for color-changing thermometers |
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| CN103006186B true CN103006186B (en) | 2014-06-18 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103454015A (en) * | 2013-08-23 | 2013-12-18 | 重庆科技学院 | Thermometer image acquisition device |
| CN104880108B (en) * | 2015-06-10 | 2016-11-09 | 中国计量学院 | A kind of top formula solar energy gravity assisted heat pipe differential temperature survey device and measuring method |
| CN106382996A (en) * | 2016-11-29 | 2017-02-08 | 东北石油大学 | Temperature automatic detection device based on LabVIEW and automatic testing method adopting the same |
| CN111207856B (en) * | 2019-12-27 | 2022-11-15 | 广东德诚科教有限公司 | Method, device and equipment for acquiring accuracy of measured temperature and readable storage medium |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4333477A (en) * | 1978-07-14 | 1982-06-08 | Melvin Chervitz | Fever thermometer |
| CN101474064A (en) * | 2008-09-18 | 2009-07-08 | 中国计量学院机电工程学院 | Method and device for testing electronic thermometer |
| CN101495843A (en) * | 2006-07-27 | 2009-07-29 | 碧彩两合股份有限公司 | Method for verifying a time-sensitive and/or temperature-sensitive indicator |
| CN201548351U (en) * | 2009-11-04 | 2010-08-11 | 湖南省计量检测研究院 | Automatic vision verification device of glass liquid thermometer |
| CN201731958U (en) * | 2010-05-05 | 2011-02-02 | 中国计量学院 | Multi-tank automatic electronic thermometer calibration device |
| CN203074678U (en) * | 2013-01-05 | 2013-07-24 | 中国计量学院 | Automatic verification device of color-changing thermometer |
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2013
- 2013-01-05 CN CN201310002092.2A patent/CN103006186B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4333477A (en) * | 1978-07-14 | 1982-06-08 | Melvin Chervitz | Fever thermometer |
| CN101495843A (en) * | 2006-07-27 | 2009-07-29 | 碧彩两合股份有限公司 | Method for verifying a time-sensitive and/or temperature-sensitive indicator |
| CN101474064A (en) * | 2008-09-18 | 2009-07-08 | 中国计量学院机电工程学院 | Method and device for testing electronic thermometer |
| CN201548351U (en) * | 2009-11-04 | 2010-08-11 | 湖南省计量检测研究院 | Automatic vision verification device of glass liquid thermometer |
| CN201731958U (en) * | 2010-05-05 | 2011-02-02 | 中国计量学院 | Multi-tank automatic electronic thermometer calibration device |
| CN203074678U (en) * | 2013-01-05 | 2013-07-24 | 中国计量学院 | Automatic verification device of color-changing thermometer |
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