CN110579281A - thermal imager with distance temperature compensation function and temperature compensation method thereof - Google Patents
thermal imager with distance temperature compensation function and temperature compensation method thereof Download PDFInfo
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- CN110579281A CN110579281A CN201910280355.3A CN201910280355A CN110579281A CN 110579281 A CN110579281 A CN 110579281A CN 201910280355 A CN201910280355 A CN 201910280355A CN 110579281 A CN110579281 A CN 110579281A
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- distance
- far infrared
- temperature compensation
- thermal imager
- temperature
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000011159 matrix material Substances 0.000 claims abstract description 37
- 230000005855 radiation Effects 0.000 claims abstract description 23
- 230000006870 function Effects 0.000 claims description 16
- QVFWZNCVPCJQOP-UHFFFAOYSA-N chloralodol Chemical compound CC(O)(C)CC(C)OC(O)C(Cl)(Cl)Cl QVFWZNCVPCJQOP-UHFFFAOYSA-N 0.000 claims description 3
- 239000004973 liquid crystal related substance Substances 0.000 claims description 3
- 206010012601 diabetes mellitus Diseases 0.000 description 6
- 230000007547 defect Effects 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 208000033808 peripheral neuropathy Diseases 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000002266 amputation Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000001931 thermography Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/06—Arrangements for eliminating effects of disturbing radiation; Arrangements for compensating changes in sensitivity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/06—Arrangements for eliminating effects of disturbing radiation; Arrangements for compensating changes in sensitivity
- G01J5/068—Arrangements for eliminating effects of disturbing radiation; Arrangements for compensating changes in sensitivity by controlling parameters other than temperature
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/80—Calibration
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Radiation Pyrometers (AREA)
Abstract
The invention provides a thermal imager with a function of temperature compensation for distance, which comprises: a matrix type distance sensor for sensing distance information of an object to be measured; a matrix far infrared sensor for sensing the far infrared radiation information of the object to be measured; a control unit coupled to the matrix distance sensor and the matrix far infrared sensor, having a temperature compensation table for looking up the table according to the distance information and the far infrared radiation information to obtain an uncompensated temperature value and a compensated correct temperature value; and a display device coupled to the control unit for displaying the compensated correct temperature value of the object to be measured. In addition, the invention also provides a method for temperature compensation of the thermal imager.
Description
Technical Field
The present invention relates to a thermal imager with a temperature compensation function for distance and a temperature compensation method thereof, and more particularly, to a thermal imager with a temperature compensation function for distance and a temperature compensation method thereof, which can perform a table lookup to a temperature compensation table according to distance information and far infrared radiation information to obtain a temperature compensation value and compensate the temperature of an object to be measured according to the temperature compensation value.
Background
Nowadays, the application of sensing the temperature of a target object by using an infrared thermal image is becoming more and more popular, for example, in airports, public places or government agencies, etc., an infrared thermal image thermal imager is used to sense the temperature of a passenger or tourist so as to prevent the passenger or tourist with abnormal body temperature from entering the environment and improve the epidemic prevention effect.
the existing infrared thermal imaging system in the prior art mainly irradiates a target object with infrared rays, detects the distance and the temperature of the target object according to the intensity of the infrared rays radiated back by the target object, attenuates the infrared rays along with the increase of the distance, and increases the temperature error of the measured target object when the distance increases, so that the distance compensation is needed, which is helpful for improving the accuracy of the temperature.
Also known is an infrared thermal imager, such as taiwan patent No. I613426, "non-contact medical thermometer and method for determining compensated temperature," which discloses a non-contact medical thermometer that includes an IR sensor assembly having an IR sensor for sensing IR radiation from a target, a distance sensor configured to determine a distance of the thermometer from the target, and a memory component operatively connected to at least the IR sensor assembly and the distance sensor. The memory component contains predetermined compensation information related to a predetermined temperature of the target and a predetermined distance from at least one predicted target. A microprocessor is operatively coupled to the memory element. The microprocessor is configured to perform a temperature calculation based on the IR radiation from the target, the distance of the thermometer to the target, and the predetermined compensation information.
However, the above-mentioned patent I613426 has the following disadvantages: 1. the distance sensor is used for single distance compensation; 2. its IR sensor is only a point type thermal profile; 3. its application range is limited to medical thermometers and the like.
Aiming at the defects of the existing thermal imager, the invention provides the thermal imager with the function of temperature compensation on the distance and the temperature compensation method thereof, so as to improve the defects.
Disclosure of Invention
The thermal imager and the temperature compensation method thereof have a matrix type distance sensor, a matrix type far infrared sensor and a temperature compensation meter, and can effectively compensate the temperature difference caused by the distance.
In order to achieve the above object, the thermal imager with temperature compensation function for distance according to the present invention comprises: a matrix type distance sensor, which is composed of a plurality of distance sensors and is used for sensing the distance information of an object to be detected; a matrix type far infrared sensor, which is composed of a plurality of far infrared band sensors capable of detecting the radiation of an object and is used for sensing the far infrared radiation information of the object to be detected; a control unit coupled to the matrix distance sensor and the matrix far infrared sensor, having a temperature compensation table for looking up the table according to the distance information and the far infrared radiation information to obtain an uncompensated temperature value and a compensated correct temperature value; and a display device coupled to the control unit for displaying the compensated correct temperature value of the object to be measured.
Preferably, the control unit is a microcontroller, the display device is a liquid crystal display or an organic light emitting diode display, and the microcontroller further has a memory in which the temperature compensation table can be stored.
Preferably, there is a switch to turn the thermal imager on or off.
Preferably, the temperature compensation device comprises a wireless output interface and a wired output interface, the wireless output interface and the wired output interface are respectively coupled to the control unit, and the control unit can output the compensated temperature through the wireless output interface or the wired output interface; the wireless output interface is a WI-FI or Lora wireless interface, and the wired output interface is a UART, I2C or SPI wired interface.
In order to achieve the above object, the present invention provides a method for temperature compensation of a thermal imager, comprising the following steps: providing a matrix type distance sensor for sensing distance information of an object to be measured; providing a matrix type far infrared ray sensor for sensing the far infrared ray radiation information of the object to be detected; and according to the distance information and far infrared radiation information of the object to be measured, compensating the temperature difference generated by the distance by a distance compensation method, and further calculating the correct temperature of the object to be measured.
Preferably, the distance compensation method obtains a temperature compensation value by querying a temperature compensation table.
For a further understanding of the structure, features and objects of the present invention, reference should now be made to the drawings and detailed description of the preferred embodiments.
Drawings
Fig. 1 is a schematic diagram illustrating a block diagram of a thermal imager with a temperature compensation function for distance according to a preferred embodiment of the invention.
Fig. 2 is a schematic view illustrating a flow chart of the method for temperature compensation of a thermal imager according to the present invention.
Detailed Description
referring to fig. 1, a block diagram of a thermal imager with a temperature compensation function for distance according to a preferred embodiment of the invention is shown.
As shown in the figure, the thermal imager with the temperature compensation function for distance of the invention comprises: a matrix type distance sensor 10; a matrix type far infrared ray sensor 20; a control unit 30; and a display device 40.
The matrix-type distance sensor 10 is composed of a plurality of distance sensors for sensing distance information of an object 100 to be measured. The matrix-type distance sensor 10 is, for example, but not limited to, a matrix-type optical sensor. The object 100 to be measured is, for example, but not limited to, this.
The matrix type far infrared sensor 20 is composed of a plurality of far infrared band sensors capable of detecting object radiation, and is used for sensing the far infrared radiation information of the object 100 to be detected. The matrix type far infrared ray sensor 20 is, for example, but not limited to, a matrix type optical sensor.
The control unit 30 is coupled to the matrix distance sensor 10 and the matrix far infrared sensor 20, and has a temperature compensation table, which can be looked up according to the distance information and the far infrared radiation information to obtain a temperature compensation value (please refer to the following table one), and a compensated correct temperature value. The control unit 30 is, for example but not limited to, a microcontroller, and the microcontroller further has a memory (not shown), in which the temperature compensation table can be stored.
The display device 40 is coupled to the control unit 30 for displaying the compensated correct temperature value of the object 100 to be measured. The display device 40 is, for example but not limited to, a Liquid Crystal Display (LCD) or an organic light emitting diode display (OLED).
In addition, the thermal imager with the temperature compensation function for distance of the present invention further has a wireless output interface 50 and a wired output interface 60, wherein the wireless output interface 50 and the wired output interface 60 are respectively coupled to the control unit 30, the control unit 30 can output the correct temperature value compensated for the object 100 to be measured to a wireless receiving device 70 through the wireless output interface 50 for displaying, or the control unit 30 can also output the correct temperature value compensated for the object 100 to be measured to a wired receiving device 80 through the wired output interface 60 for displaying; wherein the wireless output interface 50 is, for example and without limitation, a WI-FI or Lora wireless interface, and the wired output interface 60 is, for example and without limitation, a UART, I2C or SPI wired interface.
In addition, the thermal imager with the temperature compensation function for distance of the present invention further has a switch 90 for turning on or off the thermal imager.
Please refer to table one, which shows the details of the temperature compensation table of the present invention. Wherein the first upper cross column is a correct temperature value compensated for the object 100 to be measured; the first left column is the distance value of the object 100 to be measured; the remaining contents of table one are the uncompensated temperature values of the object 100 at the corresponding distance. For example, when the distance sensor 10 measures the distance to the object 100 to be measured as 10 centimeters, the control unit 30 obtains an uncompensated temperature value of 29.1 ℃ and a compensated correct temperature value of 30 ℃ through table lookup by the object 100 to be measured; when the distance sensor 10 measures that the distance to the object 100 to be measured is 80 centimeters, the control unit 30 obtains an uncompensated temperature value of the object 100 to be measured as 58.5 ℃ and a compensated correct temperature value of 60 ℃ through table lookup; and when the distance sensor 10 measures the distance to the object 100 to be measured as 150 degrees, the control unit 30 obtains the uncompensated temperature value of the object 100 to be measured as 97.6 degrees centigrade and the compensated correct temperature value as 100 degrees centigrade through table look-up.
Therefore, the thermal imager with the temperature compensation function on the distance can reach 1, and a matrix type far infrared sensor is used to present a matrix type distributed thermal image; 2. the matrix type distance sensor is used, so that the temperature difference caused by distance can be effectively compensated; 3. in medicine, the heat distribution of the foot of a diabetic patient can generate strong difference when suffering from peripheral neuropathy of the foot, the invention uses the matrix type far infrared sensor, can detect the diabetic patient before suffering from the peripheral neuropathy of the foot, so as to avoid the amputation of the diabetic patient, and the like, and the defects of the existing thermal imager can be improved really.
fig. 2 is a schematic flow chart illustrating a method for temperature compensation of a thermal imager according to the present invention.
As shown in the figure, the method for temperature compensation of a thermal imager of the present invention includes the following steps: providing a matrix type distance sensor 10 for sensing distance information of an object 100 to be measured (step 1); providing a matrix type far infrared ray sensor 20 for sensing the far infrared radiation information of the object 100 (step 2); and according to the distance information and far infrared radiation information of the object 100 to be measured, compensating the temperature difference generated by the distance by a distance compensation method, and further calculating the correct temperature value of the object 100 to be measured (step 3).
In step 1, a matrix-type distance sensor 10 is provided to sense distance information of an object 100 to be measured; the matrix-type distance sensor 10 is, for example, but not limited to, a matrix-type optical sensor, which is composed of a plurality of distance sensors and can sense the distance between the object 100 to be measured and the distance sensor 10.
In step 2, a matrix-type far infrared sensor 20 is provided to sense the far infrared radiation information of the object 100; the matrix far infrared sensor 20 is, for example but not limited to, a matrix optical sensor, which is composed of a plurality of far infrared band sensors capable of detecting object radiation.
In step 3, according to the distance information and the far infrared radiation information of the object 100 to be measured, a distance compensation method is used to compensate the temperature difference generated by the distance, and then the correct temperature value of the object 100 to be measured is calculated; the distance compensation method obtains a temperature compensation value by querying a temperature compensation table, and please refer to the description of the table one above.
Therefore, the method for compensating the temperature of the thermal imager can effectively compensate the temperature difference caused by the distance, and can improve the defects of the conventional thermal imager.
in summary, through the implementation of the thermal imager with the function of temperature compensation for distance and the temperature compensation method thereof, compared with the existing thermal imager with the function of temperature compensation for distance and the temperature compensation method thereof, the thermal imager has the following advantages: 1. it uses matrix far infrared sensor to present thermal image with matrix distribution; 2. the matrix type distance sensor is used, so that the temperature difference caused by distance can be effectively compensated; 3. in medicine, the heat distribution of the foot of a diabetic patient can generate strong difference when suffering from peripheral neuropathy of the foot, and the invention uses the matrix type far infrared sensor which can detect the heat distribution before the peripheral neuropathy of the foot of the diabetic patient so as to avoid amputation of the diabetic patient. Therefore, the thermal imager with the distance temperature compensation function and the temperature compensation method thereof have improvement compared with the conventional thermal imager.
It is to be understood that the invention is not limited to the precise embodiments disclosed, and that various changes and modifications may be effected therein without departing from the scope of the invention.
Claims (6)
1. A thermal imager with a distance temperature compensation function, comprising:
a matrix type distance sensor, which is composed of a plurality of distance sensors and is used for sensing the distance information of an object to be detected;
A matrix type far infrared sensor, which is composed of a plurality of far infrared band sensors capable of detecting the radiation of an object and is used for sensing the far infrared radiation information of the object to be detected;
A control unit coupled to the matrix distance sensor and the matrix far infrared sensor, having a temperature compensation table for looking up the table according to the distance information and the far infrared radiation information to obtain an uncompensated temperature value and a compensated correct temperature value; and
and the display device is coupled to the control unit and used for displaying the corrected temperature value of the object to be measured after compensation.
2. The thermal imager according to claim 1, wherein the control unit is a microcontroller, the display device is a liquid crystal display or an organic light emitting diode display, and the microcontroller further has a memory in which the temperature compensation table is stored.
3. The thermal imager with distance temperature compensation function of claim 1, wherein a switch is provided for turning the thermal imager on or off.
4. The thermal imager of claim 1, wherein the thermal imager has a wireless output interface and a wired output interface, the wireless output interface and the wired output interface are respectively coupled to the control unit, and the control unit can output the compensated temperature through the wireless output interface or the wired output interface; the wireless output interface is a WI-FI or Lora wireless interface, and the wired output interface is a UART, I2C or SPI wired interface.
5. A method of temperature compensating a thermal imager, comprising the steps of:
Providing a matrix type distance sensor for sensing distance information of an object to be measured;
Providing a matrix type far infrared ray sensor for sensing the far infrared ray radiation information of the object to be detected; and
According to the distance information and far infrared radiation information of the object to be measured, the temperature difference generated by the distance is compensated through a distance compensation method, and then the correct temperature value of the object to be measured is calculated.
6. The method of claim 5, wherein the distance compensation method obtains a temperature compensation value by querying a temperature compensation table.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW107119780 | 2018-06-08 | ||
| TW107119780A TWI704502B (en) | 2018-06-08 | 2018-06-08 | Thermal imager with temperature compensation function for distance and its temperature compensation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110579281A true CN110579281A (en) | 2019-12-17 |
| CN110579281B CN110579281B (en) | 2021-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910280355.3A Expired - Fee Related CN110579281B (en) | 2018-06-08 | 2019-04-09 | Thermal imager with distance temperature compensation function and temperature compensation method thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110579281B (en) |
| TW (1) | TWI704502B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111207835A (en) * | 2020-01-19 | 2020-05-29 | 上海迈内能源科技有限公司 | Infrared temperature measurement and thermal imaging optimization method |
| CN111323133A (en) * | 2020-02-14 | 2020-06-23 | 西安盛赛尔电子有限公司 | Temperature compensation method and device for temperature sensor, electronic equipment and storage medium |
| CN111442845A (en) * | 2020-03-26 | 2020-07-24 | 浙江大华技术股份有限公司 | Infrared temperature measurement method and device based on distance compensation and computer storage medium |
| CN111579086A (en) * | 2020-05-18 | 2020-08-25 | 成都电科慧安科技有限公司 | Remote infrared temperature measurement precision correction method based on distance compensation |
| CN113660435A (en) * | 2021-08-19 | 2021-11-16 | 东莞市鑫泰仪器仪表有限公司 | Gain system of infrared night vision device |
| WO2021242621A1 (en) * | 2020-05-29 | 2021-12-02 | Nec Laboratories America, Inc. | Free flow fever screening |
| US20220330835A1 (en) * | 2021-04-08 | 2022-10-20 | Wistron Corporation | Hybrid body temperature measurement system and method thereof |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI756932B (en) | 2020-11-20 | 2022-03-01 | 財團法人工業技術研究院 | Thermal imaging apparatus and temperature correction method of thermal imager |
| RU2766053C1 (en) * | 2021-04-08 | 2022-02-07 | Александр Иванович Козлов | Thermal imager based on a hybrid photodetector with an optical output (thermal imaging dynamic signal spectrum converter) |
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| EP1026521A2 (en) * | 1995-04-12 | 2000-08-09 | Matsushita Electric Industrial Co., Ltd. | Method and apparatus for detecting an object |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111207835A (en) * | 2020-01-19 | 2020-05-29 | 上海迈内能源科技有限公司 | Infrared temperature measurement and thermal imaging optimization method |
| CN111207835B (en) * | 2020-01-19 | 2021-10-08 | 上海迈内能源科技有限公司 | Infrared temperature measurement and thermal imaging optimization method |
| CN111323133A (en) * | 2020-02-14 | 2020-06-23 | 西安盛赛尔电子有限公司 | Temperature compensation method and device for temperature sensor, electronic equipment and storage medium |
| CN111442845A (en) * | 2020-03-26 | 2020-07-24 | 浙江大华技术股份有限公司 | Infrared temperature measurement method and device based on distance compensation and computer storage medium |
| CN111579086A (en) * | 2020-05-18 | 2020-08-25 | 成都电科慧安科技有限公司 | Remote infrared temperature measurement precision correction method based on distance compensation |
| WO2021242621A1 (en) * | 2020-05-29 | 2021-12-02 | Nec Laboratories America, Inc. | Free flow fever screening |
| US20220330835A1 (en) * | 2021-04-08 | 2022-10-20 | Wistron Corporation | Hybrid body temperature measurement system and method thereof |
| CN113660435A (en) * | 2021-08-19 | 2021-11-16 | 东莞市鑫泰仪器仪表有限公司 | Gain system of infrared night vision device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110579281B (en) | 2021-02-12 |
| TW202001682A (en) | 2020-01-01 |
| TWI704502B (en) | 2020-09-11 |
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