TWI704502B - Thermal imager with temperature compensation function for distance and its temperature compensation method - Google Patents

Abstract

This case is a thermal imaging camera with a temperature compensation function for distance, which includes: a matrix type distance sensor for sensing the distance information of an object to be measured; a matrix type far infrared sensor for sensing Measure the far-infrared radiation information of the object to be measured; a control unit, respectively coupled to the matrix distance sensor and the matrix-type far infrared sensor, has a temperature compensation table, which can be based on the distance information and the far infrared The radiation information is sent to the temperature compensation table to look up the table to obtain an uncompensated temperature value and a correct temperature value after compensation; and a display device, coupled to the control unit, to display the correct temperature of the object under test after compensation value. In addition, the present invention also discloses a method for temperature compensation of the thermal imager.

Description

Thermal imager with temperature compensation function for distance and its temperature compensation method

The present invention relates to a thermal imager with a temperature compensation function for distance and a temperature compensation method thereof, in particular to a temperature compensation table that can be checked based on distance information and far-infrared radiation information to obtain a temperature compensation value. And according to the temperature compensation value to compensate the temperature of the object to be measured, a thermal imager with the function of temperature compensation for distance and its temperature compensation method.

Nowadays, the use of infrared thermal imaging to sense the temperature of objects is becoming more and more popular. For example, airports, public places, or government agencies all use infrared thermal imaging cameras to sense the body temperature of passengers or tourists to avoid body temperature. Abnormal passengers or tourists enter the country to improve the effectiveness of epidemic prevention.

The conventional infrared thermal imaging camera mainly irradiates the target with infrared rays, and detects the distance and temperature according to the intensity of the infrared rays radiated by the target. However, the infrared rays will attenuate as the distance increases. When the distance increases, The temperature error of the measured target object will also increase. Therefore, the distance compensation is helpful to improve the temperature accuracy.

Also known infrared thermal imaging cameras, such as the Republic of China I613426 invention patent "Non-contact medical thermometer and method for measuring compensated temperature", that discloses a non-contact medical thermometer, which includes a device for sensing from a target An IR sensor assembly of an IR sensor for IR radiation, a distance sensor configured to measure the distance from the thermometer to the target, and a distance sensor that can be at least operatively connected to the IR sensor assembly and The memory component of 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 connected to the memory component. The microprocessor is configured to perform temperature calculation based on the IR radiation from the target, the distance from the thermometer to the target, and the predetermined compensation information.

However, the aforementioned I613426 patent has the following shortcomings: 1. Its distance sensor is a single distance compensation; 2. Its IR sensor is only point-type heat distribution; 3. Its application range is limited to medical thermometers, etc. The shortcomings.

In view of the above-mentioned shortcomings of the conventional thermal imager, the present invention provides a thermal imager with a temperature compensation function for distance and a temperature compensation method thereof to improve the above-mentioned shortcomings.

One object of the present invention is to provide a thermal imager with a temperature compensation function for distance and a temperature compensation method thereof, which has a matrix distance sensor, a matrix far infrared sensor and a temperature compensation table, which can effectively compensate The temperature difference caused by distance.

In order to achieve the above-mentioned purpose, the thermal imager with temperature compensation function of the present invention includes: a matrix type distance sensor, which is composed of a plurality of distance sensors, used to sense a to-be-measured Distance information of the object; a matrix type far-infrared sensor, composed of multiple far-infrared waveband sensors that can detect the radiation of the object, to sense the far-infrared radiation information of the object to be measured; a control unit , Respectively coupled to the matrix type distance sensor and the matrix type far-infrared sensor, which has a temperature compensation table, which can be checked according to the distance information and far-infrared radiation information to the temperature compensation table to obtain a result A compensated temperature value and a corrected correct temperature value after compensation; and a display device, coupled to the control unit, for displaying the corrected correct temperature value of the object to be measured after compensation.

In order to achieve the above objective, a method for temperature compensation of a thermal imager of the present invention includes the following steps: providing a matrix type distance sensor to sense the distance information of an object to be measured; providing a matrix type A far-infrared sensor to sense the far-infrared radiation information of the object to be measured; and according to the distance information and far-infrared radiation information of the object to be measured, a distance compensation method is used to compensate for the temperature difference caused by the distance, and then Calculate the correct temperature of the object to be measured.

In order to enable your examiner to further understand the structure, features and purpose of the present invention, the drawings and detailed description of the preferred specific embodiments are attached as follows.

Please refer to FIG. 1, which shows a block diagram of a thermal imager with a temperature compensation function for distance according to a preferred embodiment of the present application.

As shown in the figure, the thermal imager with the function of temperature compensation for distance of the present invention includes: a matrix distance sensor 10; a matrix far infrared sensor 20; a control unit 30; and a display A combination of the device 40.

Wherein, the matrix type distance sensor 10 is composed of a plurality of distance sensors for sensing the distance information of an object 100 to be measured. The matrix distance sensor 10 is, for example, but not limited to, a matrix optical sensor. Wherein, the object to be measured 100 is, for example, but not limited to, a person.

The matrix-type far-infrared sensor 20 is composed of a plurality of far-infrared waveband sensors capable of detecting the radiation of an object, and is used to sense the far-infrared radiation information of the object 100 to be measured. The matrix far-infrared sensor 20 is, for example, but not limited to, a matrix optical sensor.

The control unit 30 is respectively coupled to the matrix-type distance sensor 10 and the matrix-type far-infrared sensor 20, which has a temperature compensation table, which can be checked according to the distance information and far-infrared radiation information The table takes a temperature compensation value (please refer to the following table 1) and a correct temperature value after compensation. 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 to display the correct temperature value of the object 100 after compensation. 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 temperature compensation function 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 compensated correct temperature value of the object to be measured 100 through the wireless output interface 50 to a wireless receiving device 70 for display, or the control unit 30 can also output the measured temperature value through the wired output interface 60 The correct temperature value of the object 100 after compensation is displayed on a wired receiving device 80; the wireless output interface 50 is, for example, but not limited to, a WI-FI or Lora wireless interface, and the wired output interface 60 is, for example, but not limited to, a UART, I2C or SPI wired interface.

In addition, the thermal imager with the temperature compensation function of the present invention further has a switch 90 for turning on or off the thermal imager.

Please refer to Table 1, which shows the details of the temperature compensation table of the present invention. The first top row is the correct temperature value of the object to be measured 100 after compensation; the first left vertical row is the distance value of the object to be measured 100; the rest of Table 1 is when the object to be measured 100 is at the corresponding distance The uncompensated temperature value. For example, when the distance sensor 10 measures the distance of the object 100 to be measured to be 10 cm, the control unit 30 obtains the uncompensated temperature value of the object to be measured 100 to be 29.1°C and the correct temperature after compensation through a look-up table The value is 30°C; when the distance sensor 10 measures the distance of the object to be measured 100 to be 80 cm, the control unit 30 obtains the uncompensated temperature value of the object to be measured 100 by looking up the table as 58.5°C, and compensates Then the correct temperature value is 60°C; and when the distance sensor 10 measures the distance of the object to be measured 100 to be 150 cm, the control unit 30 obtains the uncompensated temperature value of the object to be measured 100 by looking up the table 97.6℃, and the correct temperature value after compensation is 100℃.

Therefore, the thermal imager with the temperature compensation function of the present invention can indeed achieve 1. It uses a matrix-type far-infrared sensor, which can display a matrix-type thermal image; 2. It uses a matrix-type distance sensor The sensor can effectively compensate for the temperature difference caused by the distance; 3. In medicine, the heat distribution of the foot before the occurrence of peripheral neuropathy of the foot will have a strong difference in the heat distribution of the diabetic patient. The matrix type far infrared sensor is used in this case, which can be used in diabetes Pre-detection of peripheral neuropathy of the foot, to avoid the need for amputation of patients and other advantages, can indeed improve the disadvantages of conventional thermal imaging cameras.

Please refer to FIG. 2, which shows a schematic flow diagram of 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 distance sensor 10 to sense the distance information of an object 100 (step 1); A matrix type far-infrared sensor 20 is provided to sense the far-infrared radiation information of the object 100 (step 2); and according to the distance information and the far-infrared radiation information of the object 100, a distance compensation method is adopted In order to compensate the temperature difference caused by the distance, the correct temperature value of the object 100 to be measured is calculated (step 3).

In step 1, a matrix distance sensor 10 is provided to sense the distance information of an object 100; wherein, the matrix distance sensor 10 is, for example, but not limited to, a matrix optical sensor, which It is composed of a plurality of distance sensors, which 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; wherein, the matrix-type far-infrared sensor 20 is, for example, but not limited to, a matrix optical The sensor is composed of multiple far-infrared waveband sensors that can detect the radiation of objects.

In step 3, according to the distance information and far-infrared radiation information of the object to be measured 100, a distance compensation method is used to compensate for the temperature difference caused by the distance, and then the correct temperature value of the object to be measured 100 is calculated; The distance compensation method is to obtain a temperature compensation value by querying a temperature compensation table. For details, please refer to the description in Table 1 above.

Therefore, the temperature compensation method of the present invention can indeed achieve the advantage of effectively compensating the temperature difference caused by the distance, and can indeed improve the disadvantages of the conventional thermal imager.

In summary, by implementing the thermal imager with the function of temperature compensation for distance and its temperature compensation method of the present invention, compared with the conventional thermal imager with the function of temperature compensation for distance and its temperature compensation method, it has The following advantages: 1. It uses a matrix-type far-infrared sensor, which can present matrix-type thermal images; 2. It uses a matrix-type distance sensor, which can effectively compensate for the temperature difference caused by distance; 3. In medicine, Diabetes patients will have a strong difference in the heat distribution of the feet before the occurrence of foot peripheral neuropathy. In this case, a matrix-type far-infrared sensor can be used to detect the diabetic foot peripheral neuropathy to avoid the need for amputation. Etc. Therefore, the thermal imager with the function of temperature compensation for the distance and the temperature compensation method of the present invention are indeed more advanced than the conventional thermal imager.

The disclosure in this case is a preferred embodiment, and any partial changes or modifications that are derived from the technical ideas of the case and can be easily inferred by those who are familiar with the art do not deviate from the scope of the patent right of the case.

In summary, regardless of the purpose, means, and effects of this case, it is showing its technical characteristics that are very different from conventional knowledge, and its first invention is suitable for practical use, and it is also in line with the patent requirements of the invention. I urge your examiner to observe and pray. Granting patents as soon as possible will benefit the society and feel the virtues.

10‧‧‧Matrix type distance sensor 20‧‧‧Matrix far infrared sensor 30‧‧‧Control Unit 40‧‧‧Display device 50‧‧‧Wireless output interface 60‧‧‧Wired output interface 70‧‧‧Wireless receiving device 80‧‧‧Wired receiving device 90‧‧‧Switch 100‧‧‧Object to be measured

FIG. 1 is a schematic diagram showing a block diagram of a thermal imager with a temperature compensation function for distance according to a preferred embodiment of the present application. FIG. 2 is a schematic diagram showing the flow diagram of the method for temperature compensation of the thermal imager according to the present invention.

10‧‧‧Matrix type distance sensor

20‧‧‧Matrix far infrared sensor

30‧‧‧Control Unit

40‧‧‧Display device

50‧‧‧Wireless output interface

60‧‧‧Wired output interface

70‧‧‧Wireless receiving device

80‧‧‧Wired receiving device

90‧‧‧Switch

100‧‧‧Object to be measured

Claims (6)

A thermal imaging camera with temperature compensation function for distance, which includes: 　　 a matrix type distance sensor composed of a plurality of distance sensors to sense the distance information of an object to be measured; 　　 a matrix type The far-infrared sensor is composed of a plurality of far-infrared waveband sensors that can detect the radiation of the object, and is used to sense the far-infrared radiation information of the object to be measured; 　　 a control unit, respectively coupled to the matrix type The distance sensor and the matrix-type far-infrared sensor have a temperature compensation table. According to the distance information and the far-infrared radiation information, the temperature compensation table can be checked to obtain an uncompensated temperature value and a compensated The correct temperature value; and a display device coupled to the control unit for displaying the correct temperature value of the object to be measured after compensation. As described in item 1 of the scope of patent application, the thermal imager with temperature compensation function for distance, wherein the control unit is a microcontroller, the display device is a liquid crystal display or an organic light emitting diode display, and the micro The controller further has a memory, and the temperature compensation table can be stored in the memory. The thermal imager with the function of temperature compensation for distance as described in item 1 of the scope of patent application further has a switch for turning on or off the thermal imager. The thermal imager with the function of temperature compensation for distance as described in item 1 of the scope of patent application further 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, the control unit can output the compensated temperature through the wireless output interface or wired output interface; wherein 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 . A method for temperature compensation of a thermal imaging camera, which includes the following steps: 　　 provides a matrix distance sensor to sense the distance information of an object to be measured; 　　 provides a matrix type far infrared sensor to sense The far-infrared radiation information of the object to be measured; and according to the distance information and the far-infrared radiation information of the object to be measured, a distance compensation method is used to compensate the temperature difference caused by the distance, and then the correct temperature of the object to be measured is calculated value. The method described in item 5 of the scope of patent application, wherein the distance compensation method is obtained by querying a temperature compensation table to obtain a temperature compensation value.

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