TWI413761B - Automatic measurement apparatus for thermometers by image recognition - Google Patents

Abstract

An automatic measurement apparatus for thermometers by image recognition comprises a thermostat with liquid having an opening and electrically connected to a controller; a transmission mechanism vertically fastened on the thermostat and electrically connected to the controller and controlled thereby, and the transmission mechanism held clinical electrical thermometers or liquid-in-glass thermometers to be immersed into the opening of the thermostat to make an up-down movement or angular rotation; and an optical mechanism installed on the thermostat by a plate and electrically connected to the controller, and the optical mechanism aimed at one of the clinical electrical thermometers or liquid-in-glass thermometers to automatically capture the temperature data by image recognition software of the controller with pixel ratio or OCR.

Description

Thermometer image recognition automatic measuring device

The invention relates to an automatic measuring device, in particular to an automatic measuring device capable of performing image recognition on an electronic thermometer and a glass thermometer.

At present, in the measuring instrument for the temperature of the object, neither the glass thermometer nor the electronic thermometer has a transmission interface transmission signal, and the measurement, calibration and verification are all used as tools for interpretation by the human eye. Glass thermometer (mercury or alcohol thermometer), measuring temperature is the principle of using thermal expansion and contraction, such thermometer is sealed with glass tube, and the liquid system used is mercury (mercury) or alcohol, but the measurement accuracy of mercury Higher.

The thermometer can be roughly divided into an ear thermometer that is measured by infrared rays and an electronic thermometer that is thermally conductive. Compared with the ear thermometer, the electronic thermometer is not only cheap but also has a small tolerance for measurement. However, because the human eye is used as a tool for interpretation, the equivalent measurement/detection timing has the potential high risk of visual fatigue and error.

While the temperature measurement of glass temperature is relatively accurate, it is generally interpreted by the human eye at the measurement site. Not only is the reading inconvenient, but different people read the readings with different precisions, so the measurement accuracy is The human factors and the subjectivity of the reading process are offset, and the resolution is limited by the minimum index of the glass thermometer itself.

In addition, in the production process of glass thermometers, it is usually necessary to check the produced thermometers; in the calibration, the thermometers should be placed in thermostats of different temperatures, and then the readings indicated on the thermometer should be read to measure the scales of the thermometer. Verification; liquid spillage and soot in the field thermostat will cause damage to the inspector, and the same problem occurs with the measurement of high temperature gas or liquid by glass temperature.

Furthermore, the thermometer detection/correction equipment currently used can only be read for a glass thermometer or an electronic thermometer, but it cannot be applied to both at the same time, resulting in the necessity of using two sets of equipment, thereby increasing production costs and detecting personnel. You must learn the skills of two different sets of equipment, which can easily lead to operational errors.

Based on the above problems, the inventors have proposed a thermometer image recognition automatic measuring device to overcome the drawbacks of the prior art.

The object of the present invention is to provide a mechanical device capable of 360° rotation and up and down movement (ie, θ-z operation) and having a double-layer clamp, and an optical device combining a CCD module and a computer image recognition software to achieve automatic measurement/ A thermometer image recognition automatic measuring device for verifying the electronic thermometer and increasing the resolution of the glass thermometer by 10 times.

In order to achieve the above object, the present invention provides a thermometer image recognition automatic measuring device, comprising: a controller; a thermostatic bath, the content of which is provided with a liquid, the thermostatic bath has a test hole above, and the thermostat is The controller is electrically connected and adjusted by the controller at a predetermined temperature; a transfer mechanism is vertically displaceable and rotatably disposed above the thermostat and electrically connected to the controller and controlled by the controller Control, and the transfer mechanism is clamped with a plurality of electronic thermometers or a plurality of glass thermometers, and aligned with the test hole of the thermostat; and an optical mechanism is disposed on the thermostat by a platform, and The controller is electrically connected and the optical mechanism is aligned with one of the electronic thermometers or one of the glass thermometers sandwiched between the transfer mechanisms.

The transfer mechanism comprises a cylindrical support, a two-motor linear drive member, a two-motor rotary drive member and a double-layer clamp assembly, the cylindrical support is vertically fixed on the thermostatic bath, and the two motors are linearly driven. The two motor-driven rotary members are respectively coupled to the two-motor linear drive member, and the two-motor linear drive member and the two-motor rotary drive member are coupled to the cylindrical support. The controller is electrically connected, and is respectively controlled by the controller to control displacement and rotation. The double-layer clamp assembly comprises two concentric tube shafts, an inner layer ring fixture and an outer ring clamp, and the two concentric tube shafts are The two motor rotary driving members are respectively driven by the two, and the inner ring ring clamp and the outer ring ring clamp are respectively connected to the two concentric tube shafts, and are driven by the displacement and rotation of the two concentric tube shafts.

While the invention has been described in terms of several preferred embodiments, the preferred embodiments of the present invention It is not intended that the invention be limited to the following drawings and embodiments.

Please refer to FIG. 1 , which is a structural diagram of the thermometer image recognition automatic measuring device of the present invention. The thermometer image recognition automatic measuring device 1 of the invention can respectively perform 360° rotation and up and down movement (ie θ-z operation), and has a double-clamp group transfer mechanism 2 and a platform 31 combined with the computer 5 of the image recognition software. The optical mechanism 3 achieves the purpose of automatically measuring/verifying the electronic thermometer and increasing the resolution of the glass thermometer by 10 times.

The thermometer image recognition automatic measuring device 1 of the present invention comprises a transfer mechanism 2, an optical mechanism 3, a constant temperature bath 4 and a controller. The invention is described by taking the computer 5 as a controller as an example. But it is not limited to this.

Referring to FIG. 2 again, it is a structural diagram showing a transfer mechanism of the thermometer image recognition automatic measuring device of the present invention. The transfer mechanism 2 includes a cylindrical support 21, two motor linear drive members 22, two motor rotary drive members 23 and a double-layer clamp assembly 24; wherein the cylindrical support 21 is vertically fixed above the thermostatic bath 4, And the cylindrical support 21 carries two motor linear drive members 22 and two motor rotary drive members 23, that is, the cylindrical support 21 carries the two motor linear drive members 22, and the two motor rotary drive members 23 are rotatably and spaced apart. The two motor linear drive members 22 are respectively connected, and the motor linear drive member 22 drives the motor rotary drive member 23 by the aluminum block 26 to drive the thermometer fixed to the double-layer rotary clamp group 24 (such as an electronic thermometer 6 or a glass thermometer 7). ) Move up or down.

Furthermore, please refer to FIG. 3 at the same time, which is an enlarged view of the transfer mechanism of the thermometer image recognition automatic measuring device of the present invention. The rotatable double-layer clamp group 24 is composed of two concentric tube shafts 241 respectively fixed to the motor rotation driving member 23, and an inner ring-shaped clamp 242 and an outer ring-shaped clamp 243 connected to the lower end of the concentric tube shaft 241; wherein, the motor The rotary driving member 23 can drive the thermometer clamped by the ring clamps 242 and 243 (such as the electronic thermometer 6 or the glass thermometer 7), and rotates to adjust to the proper position according to the aim of the optical mechanism 3; and the inner and outer layers Both the ring clamps 242 and 243 can hold the electronic thermometer 6, so that the measurement/verification amount of each electronic thermometer 6 can be increased.

In addition, when measuring/correcting the glass thermometer 7, it is only necessary to first place the glass thermometer 7 into the suitable matching device (not shown), and still use the original ring clamps 242 and 243 to clamp and fix; For calibration/checking, the working standard 36 is fixed at the center of the concentric tube shaft 241, and the working standard 36 is a Platinum Resistance Thermometer (PRT). In order to protect the weaker standard member 36, the standard is The piece 36 does not move or rotate up or down with the electronic thermometer 6 or the glass temperature 7.

The optical mechanism 3 is a CCD module, which is disposed on the thermostatic bath 4 by a platform 31. The optical mechanism 3 is electrically connected to the computer 5 with the image recognition software to achieve automatic processing, identification of images and storage of temperature values. .

Please refer to FIG. 4, which is a flow chart showing the measurement steps of the thermometer image recognition automatic measuring device of the present invention. The measuring method of the thermometer image recognition automatic measuring device 1 of the present invention comprises the following steps: Step S1: setting the constant temperature bath 4 to a corrected temperature; step S2: determining whether the temperature balance is reached by the computer 5, if not, returning Step S1, if yes, proceed to the next step; Step S3: Control the electronic thermometer 6 or the glass thermometer 7 disposed on the outer ring clamp 243 of the transfer mechanism 2 to be rotated by the computer 5 to the front end of the optical mechanism 3 of the CCD module And taking the image; step S4: performing image processing for identifying the temperature display value by the image recognition software of the computer 5; step S5: determining whether the electronic thermometer 6 or the glass thermometer 7 disposed in the outer ring clamp 243 is corrected, if not, Then, returning to step S3, if yes, proceeding to the next step; step S6: controlling the transfer mechanism 2 to raise the outer ring clamp 243, and exposing the electronic thermometer 6 or the glass thermometer 7 of the inner ring clamp 242; step S7 : The electronic thermometer 6 or the glass thermometer 7 disposed in the inner ring clamp 242 of the transfer mechanism 2 is rotated by the computer 5 to the front end of the optical mechanism 3 of the CCD module. And taking the image; step S8: performing image processing for identifying the temperature display value by the image recognition software of the computer 5; step S9: determining whether the electronic thermometer 6 or the glass thermometer 7 disposed in the inner ring clamp 242 is corrected, or not Then, returning to step S7, if yes, proceeding to the next step; step S10: determining whether all the temperatures to be corrected are completed, and if so, ending the measurement, if not, lowering the outer ring clamp 243, the electronic thermometer 6 or the glass thermometer 7 is again immersed in the constant temperature bath 4 (step S11), and returns to step S1 to perform measurement of another corrected temperature setting.

Among them, when the glass thermometer 7 is equivalently measured/corrected, since the temperature of the glass thermometer 7 is generally stable, the method of the international inspection unit usually enlarges the scale image, and when the minimum division is G _Old , After the eye judgment, it is estimated that one reading value is 0.1G _Old digit, that is, the last reading value T _{human eye} = original readable reading value T _Old + human eye estimation value. The thermometer image recognition automatic measuring device 1 of the invention breaks through the potential error of the human eye estimation, and uses the optical mechanism 3 to calculate the pixel ratio scientifically to accurately calculate the next reading value, that is, the invention can accurately read The minimum graduation value is 0.1 times of the original division value, and the resolution is increased by 10 times. In operation, the liquid column of the glass thermometer 7 and the top and bottom of the liquid column top are both labeled as CCD modules. The optical mechanism 3 captures the image, and then calculates the pixel (indicated by a) of the liquid column higher than the lower adjacent scale and the upper and lower adjacent scale (the minimum division G _Old ) by the computer software (indicated by c), and finally The reading value T _New = the original readable reading value T _Old + a / c × G _Old , which is equivalent to the new minimum index G _New = 0.1G _Old , which means that the resolution is improved by pixel ratio analysis.

For example, the mercury (or alcohol) liquid column of the glass thermometer 7 is stopped between 36.1 ° C and 36.2 ° C. It can only be approximated by the human eye. If it is identified by the pixel ratio analysis method, if it is 36.1 ° C and 36.2 ° C. The number of pixels c is 10, and the liquid column of mercury (or alcohol) exceeds 36.1°C (pixel a) on the scale of 36.1°C. Therefore, the amount of glass thermometer at this time can be calculated by computer 5. The measured temperature was 36.1 ° C + (3/10) (36.2-36.1) ° C = 36.13 ° C, a relative increase of 10 times the accuracy.

When the electronic thermometer is equivalently measured/verified, the automatic measuring method of the present invention (as shown in FIG. 4) first immerses the electronic thermometer 6 appropriately fitted to the inner and outer ring clamps 242, 243 by the motor linear driving member 22. In the constant temperature bath 4 to a suitable depth, the bath temperature is up to a predetermined temperature and stabilized, and the electronic thermometer 6 mounted on the outer ring clamp 243 is rotated by the concentric tube shaft 241 to sequentially rotate each electronic thermometer 6 to the appropriate temperature. Position, for the purpose of capturing images for the optical mechanism 3 of the CCD module and performing image recognition and storage of the image recognition software in the computer 5, the image recognition of the read value is using Optical Character Recognition (OCR). The method displays the displayed value on the electronic thermometer 6; after the outer electronic thermometer 6 is completely measured/verified, the outer linear thermometer 6 is lifted upward by the motor linear driving member 22 to facilitate the automatic measurement of the inner electronic thermometer 6 Repeat the aforementioned rotation and image processing steps until the inner layer electronic thermometer has completed measurement/verification. The temperature of the water tank is set, and the measurement/verification steps of the outer and inner electronic thermometers 243 and 242 are repeated until all the electronic thermometers 6 have been tested at three temperatures of 35.5 ° C, 37 ° C, and 41 ° C.

Although the present invention has been explained in connection with the preferred embodiments, it is not intended to limit the invention. It should be noted that many other similar embodiments can be constructed in accordance with the teachings of the present invention, which are within the scope of the present invention.

1. . . Thermometer image recognition automatic measuring device

2. . . Transfer mechanism

twenty one. . . Column support

twenty two. . . Motor linear drive

twenty three. . . Motor rotary drive

twenty four. . . Double-layer fixture set

241. . . Concentric tube axis

242. . . Inner ring clamp

243. . . Outer ring fixture

26. . . Aluminum block

3. . . Optical mechanism

31. . . platform

36. . . Working standard

4. . . Thermostat

5. . . computer

6. . . Digital Thermometer

7. . . Glass thermometer

Fig. 1 is a structural view showing an automatic measuring device for image recognition of a thermometer of the present invention.

Fig. 2 is a structural view showing a transfer mechanism of the thermometer image recognition automatic measuring device of the present invention.

Fig. 3 is an enlarged view showing the transfer mechanism of the thermometer image recognition automatic measuring device of the present invention.

4 is a flow chart showing the measuring steps of the thermometer image recognition automatic measuring device of the present invention.

1. . . Thermometer image recognition automatic measuring device

2. . . Transfer mechanism

3. . . Optical mechanism

31. . . platform

4. . . Thermostat

5. . . computer

Claims (7)

A thermometer image identification automatic measuring device comprises: a controller; a thermostatic bath, the content of which is provided with a liquid, the thermostatic bath has a test hole above, and the thermostatic bath is electrically connected to the controller, and is subjected to The controller is adjusted at a predetermined temperature; a transfer mechanism is vertically displaceable and rotatably disposed above the thermostat, and is electrically connected to the controller and controlled by the controller, and the transfer mechanism is Holding a plurality of electronic thermometers or a plurality of glass thermometers and aligning the test holes of the thermostat; and an optical mechanism disposed on the thermostat by a platform and electrically connected to the controller, and the optical The mechanism is directed to one of the electronic thermometers or one of the glass thermometers sandwiched between the transfer mechanisms. The thermometer image recognition automatic measuring device according to claim 1, wherein the transfer mechanism comprises a column support, a two-motor linear drive member, a two-motor rotary drive member and a double-layer clamp set. The cylindrical support is vertically fixed on the thermostatic bath, the two motor linear drive members are movably and spacedly supported on the cylindrical support, and the two motor rotary drive members are respectively connected to the two motors a linear drive member, the two-motor linear drive member and the two-motor rotary drive member are electrically connected to the controller, and are respectively controlled by the controller for displacement and rotation, and the double-layer clamp assembly includes two concentric tube shafts. An inner ring-shaped jig and an outer ring-shaped jig, the two concentric tube shafts are disposed between the two motor rotary driving members and respectively driven by the same, and the inner ring-shaped jig and the outer ring-shaped jig are respectively connected to the The two concentric tube shafts are driven by the displacement and rotation of the two concentric tube shafts. The thermometer image recognition automatic measuring device according to claim 1, wherein the optical mechanism is a CCD module. The thermometer image recognition automatic measuring device according to claim 1, wherein the controller is a computer having image recognition software. The image recognition automatic measuring device for thermometer image according to the fourth aspect of the patent application, wherein the image recognition method of the image recognition software comprises pixel ratio analysis and optical character recognition (OCR). The thermometer image recognition automatic measuring device according to claim 5, wherein the controller uses graphic recognition when the double-layer clamp group clamps the electronic body temperature timers. The thermometer image recognition automatic measuring device according to claim 5, wherein when the double-layer clamp group holds the glass thermometers, the controller uses a pixel ratio analysis.