TWM644439U - Infrared sensor calibration device - Google Patents

Abstract

The invention provides an infrared sensor calibration device, which includes: a temperature-controlled heat source; a temperature-controlled box with at least one infrared temperature sensor; and a processor, which is electrically connected to the A temperature-controlled heat source and an infrared temperature sensor, and the processor is provided with a control unit and a processing calculation unit electrically connected to each other, and the control unit controls the temperature of the space in the temperature-controlled box and generates at least one space temperature values, and the control unit controls the temperature of the temperature-controlled heat source and generates at least two heat source temperature values, and the infrared temperature sensor generates at least two heat source sensing values, In addition, the processing calculation unit generates an initial increase relational expression of each space temperature from the heat source temperature value and the heat source sensing value, and the processing calculation unit obtains an increase value of each space temperature from each initial increase relational expression, and the The processing calculation unit generates a correction increase relational expression from the increase value of each space temperature and the space temperature value.

Description

Infrared sensor calibration device

The invention relates to a calibration device, especially an infrared sensor calibration device that can reduce storage costs and computing costs.

Because infrared has strong penetrating power, it has been widely used in communication, medical treatment, detection, military, space and other fields, and because the application of infrared sensing technology will also be used as an imaging system, so infrared sensing Measurement technology has been widely used in various fields, and if infrared is used in imaging systems, most of the infrared waves selected are usually 8-15 microns, mainly because infrared in this band can be used at room temperature , and can sense the temperature of the object to be tested and complete the imaging with the temperature sensing signal.

However, when infrared sensing technology is used, its infrared sensor senses an object and generates an infrared image. If the infrared image is composed of 640*480 points, then the infrared sensor is a sensor The points of 640*480 are used to form an infrared image, but the values of each point will have different gains due to changes in the ambient temperature or the temperature of the infrared lens itself. Because the gain of each point is different, the imaging will not be clear. Therefore, it is known that the non-uniform correction (NUC) method is used to correct the gain to make the image clearer.

The above-mentioned non-uniform correction (NUC) method mainly uses two-point correction, using a fixed ambient temperature of the infrared sensor and a temperature-adjusted black body (Black body) as the emission correction source, and measuring the high and low two-point temperature And record the measurement value of each point, calculate the gain of each point and use the average value as the adjustment standard, and then adjust the gain of each point to the same result, but this is only the information established for the ambient temperature of the infrared sensor. When the temperature of the infrared sensor itself changes, the completed calibration parameters cannot be used, and the imaging will also be unclear. Therefore, in order to solve this problem, the sensing equipment of the infrared sensor needs to be calculated. The average value of multiple gain points is used as the adjustment standard. However, after multiple calculations, the sensing device not only needs a large-capacity storage unit for storage, but also needs to select different calibration parameters according to different environmental conditions. To use, and therefore requires a high-level computing unit to perform multiple gain calculations, resulting in an increase in storage costs and computing costs.

Therefore, how to improve the above-mentioned deficiencies is the technical difficulty that the author of this case wants to solve.

Therefore, in order to effectively solve the above-mentioned problems, the main purpose of this invention is to provide an infrared sensor calibration device that can reduce storage costs and computing costs.

In order to achieve the above purpose, the invention provides an infrared sensor calibration device, which includes: a temperature-controlled heat source; a temperature-controlled box, at least one infrared temperature sensor is arranged in the temperature-controlled box; and a processor , the processor is electrically connected to the temperature control heat source and the infrared temperature sensor, and the processor is provided with a control unit and a processing calculation unit electrically connected to each other, and the control unit controls the temperature control box The space temperature in the body produces a different space temperature value, and the control unit controls the temperature of the temperature-controlled heat source and produces at least two heat source temperature values, and the infrared temperature sensor senses the temperature of the space The temperature of the heat source is controlled and at least two heat source sensing values are generated, and the processing calculation unit generates an initial increase relationship expression of each space temperature from the heat source temperature value and the heat source sensing value, and the processing calculation unit is composed of each The initial increasing relational expression obtains an increasing value of each space temperature, and the processing calculation unit generates a correction increasing relational expression from the increasing value of each space temperature and the space temperature value.

According to an embodiment of the infrared sensor calibration device of the present invention, the processor further includes a space temperature sensor, which senses the space temperature in the temperature-controlled box and generates a certain The above-mentioned space temperature value.

According to an embodiment of the infrared sensor calibration device of the present invention, the temperature control box further includes a sensing gate, and the infrared temperature sensor senses the temperature of the temperature control heat source through the sensing gate And generate the sensing value of the heat source.

According to an embodiment of the infrared sensor calibration device of the present invention, the temperature control box further includes a communication port, and the processor is electrically connected to the infrared temperature sensor through the communication port.

According to an embodiment of the infrared sensor calibration device of the present invention, the processor further includes a storage unit for storing the calibration gain relational expression.

According to an embodiment of the infrared sensor calibration device of the present invention, wherein the processing calculation unit receives the ambient temperature of the infrared temperature sensor and calculates a calibration result from the correction gain relational formula, and the infrared temperature sensor Perform calibration based on the calibration result and sense the temperature of a test object to generate a sensing value, and the processing calculation unit receives the sensing value and performs imaging.

The above-mentioned purpose of this creation and its structural and functional characteristics will be described according to the preferred embodiments of the accompanying drawings.

In the following, for the composition and technical content of the infrared sensor calibration device of this creation, various applicable examples are listed and described in detail with reference to the accompanying drawings; however, the creation is certainly not limited to the listed ones. These embodiments, drawings, or detailed descriptions are just for reference.

Furthermore, those who are familiar with this technology should also be clear: the enumerated embodiments and the attached drawings are only for reference and description, and are not used to limit the creation; Creations completed through modifications or changes are also deemed to be within the scope of the spirit and intent of this creation, and of course such creations are also included in the scope of patent applications for this creation.

In addition, the directional terms mentioned in the following embodiments, such as "upper", "lower", "left", "right", "front", "rear", etc., are only referring to the directions attached to the drawings. Therefore, the used directional terms are used for illustration, not for limiting the invention; moreover, in the following embodiments, the same or similar elements will use the same or similar element numbers.

First of all, please refer to Figure 1 and Figure 2, which are schematic diagrams and block diagrams of the infrared sensor calibration device 1 of this invention, wherein the infrared sensor calibration device 1 includes a temperature-controlled heat source 2 and A temperature control box 3 and a processor 4 .

The temperature-controlled heat source 2 is electrically connected to the processor 4, and the heat source is a black body.

At least one infrared temperature sensor 31 and at least one space temperature sensor 32 are arranged inside the temperature control box 3, and a sensing gate 33 is arranged on one side of the temperature control box 3, and a sensing gate 33 is arranged on the other side. There is a communication port 34 .

Wherein the processor 4 is electrically connected to the infrared temperature sensor 31 through the communication port 34 with a signal connection line, and the processor 4 is provided with a control unit 41 and a processing calculation unit electrically connected to each other 42 and a storage unit 43.

And when the infrared sensor calibration device 1 generates the calibration formula for the infrared temperature sensor 31 in the temperature control box 3, the control unit 41 of the processor 4 controls the temperature of the temperature control heat source 2 and the temperature control The temperature of the space in the box 3 makes the temperature-controlled heat source 2 generate a heat source temperature value, which is the black body temperature. After the space temperature in the temperature-controlled box 3 reaches the set temperature, the space temperature sensor The device 32 senses the space temperature in the temperature control box 3 and generates a space temperature value (for example, the space temperature value is 20.57, but it is not limited to this, it needs to be determined according to the actual use situation), at this time, the The control unit 41 opens the sensing gate 33, and the infrared temperature sensor 31 senses the temperature of the temperature-controlled heat source 2 through the sensing gate 33 and generates a heat source sensing value, and the processing calculation unit 42 receives The temperature value of the heat source and the sensing value of the heat source are calculated by a relational expression, which means that the temperature value of the heat source is defined as X and the sensing value of the heat source is defined as Y, and when the temperature value of this space is 20.57 degrees, the control unit 41 Then control the temperature of the temperature-controlled heat source 2 so that the temperature-controlled heat source 2 produces another heat source temperature value X, and the infrared temperature sensor 31 senses the temperature of the temperature-controlled heat source 2 through the sensing gate 33 And another heat source sensing value Y is generated, and the processing calculation unit 42 generates an initial increase relational expression through at least two heat source temperature values and at least two heat source sensing values.

In this embodiment, it is implemented by generating 6 sets of initial gain relational formulas, but the numerical value and the number of groups set by each heat source temperature value X and the heat source sensing value Y are not limited thereto, and the heat source temperature The value X is five sets of values, and the heat source sensing value Y is the sensing value generated by the infrared temperature sensor 31 corresponding to the heat source temperature value X, thereby generating the initial increase. The relational formula is: Y=value 1X- value 2, and record the value of the space temperature of the initial increase relational expression as value 3, and the value 1 is one of the increase value of the initial increase relational expression.

In addition, the control unit 41 of the processor 4 controls the temperature of the space in the temperature-controlled box 3, so that the temperature-controlled heat source 2 generates the value of the temperature of the heat source, and the temperature of the space in the temperature-controlled box 3 reaches the set value. After temperature, the space temperature sensor 32 senses the space temperature in the temperature control box 3 and generates the space temperature value, and produces another set of initial gain relational expressions, and repeats this method until a certain value is generated. 6 groups of initial increase relational expressions.

Wherein, the processing calculation unit 42 can obtain the increment values of each space temperature from the initial increment relational expressions, and the processing calculation unit 42 receives the space temperature values and the increment values and performs the calculation of the relational expressions and generates a corrected increment relation The formula is to define the space temperature value as X1 and the increase value as Y, and then generate the correction increase relational expression, the correction increase relational expression is: Y1=value 3X1+value 4, and the correction increase relational expression is It can be stored in the storage unit 43 .

And after the processor 4 has the correction gain relational formula, when the processor 4 is used in other infrared temperature sensors 31, the processing calculation unit 42 first receives the ambient temperature of the infrared temperature sensor 31, and the The ambient temperature is brought into the X1 in the correction gain relational expression, and then Y1 of the correction gain relational expression can be calculated, and the Y1 is a correction result, and the infrared temperature sensor 31 is calibrated by the correction result, by Therefore, the sensing value generated by the infrared temperature sensor 31 when sensing the temperature of an object under test can present a clear image on the processor 4, and the storage unit 43 saves the need to store many The storage cost increases due to one initial increase relational expression, and the processing calculation unit 42 can eliminate the need to calculate multiple correction increase relational expressions and cause the increase of operation cost, etc., thereby achieving the effect of reducing storage cost and operation cost.

The above has made a detailed description of this creation, but the above is only one of the preferred embodiments of this creation, and should not limit the scope of implementation of this creation, that is, all equal changes and modifications made according to the scope of application of this creation etc., should still be covered by the patent of this creation.

1: Infrared sensor calibration device

2: Temperature control heat source

3: Temperature control box

31: Infrared temperature sensor

32: Space temperature sensor

33: Sensing gate

34: Connecting port

4: Processor

41: Control unit

42: Processing computing unit

43: storage unit

Figure 1 is a schematic diagram of the infrared sensor calibration device of this invention. Figure 2 is a block diagram of the infrared sensor calibration device of this invention.

1: Infrared sensor calibration device

2: Temperature control heat source

3: Temperature control box

31: Infrared temperature sensor

32: Space temperature sensor

33: Sensing gate

34: Connecting port

4: Processor

Claims (6)

An infrared sensor calibration device, comprising: a temperature-controlled heat source; A temperature control box, the temperature control box is provided with at least one infrared temperature sensor; and A processor, the processor is electrically connected to the temperature control heat source and the infrared temperature sensor, and the processor is provided with a control unit and a processing calculation unit electrically connected to each other, and the control unit controls the The temperature of the space in the temperature-controlled box produces a different space temperature value. In addition, the control unit controls the temperature of the temperature-controlled heat source and produces at least two heat source temperature values. Sensing the temperature of the temperature-controlled heat source and generating at least two heat source sensing values, and the processing calculation unit generates an initial increase relationship expression of each space temperature from the heat source temperature value and the heat source sensing value, and the processing calculation unit An increase value of each space temperature is obtained from each initial increase relational expression, and the processing calculation unit generates a correction increase relational expression from the increase value of each space temperature and the space temperature value. The infrared sensor calibration device as described in claim 1, wherein the processor further includes a space temperature sensor, which senses the space temperature in the temperature control box and generates a certain The above-mentioned space temperature value. The infrared sensor calibration device as described in claim 1, wherein the temperature control box further includes a sensing gate, and the infrared temperature sensor senses the temperature of the temperature control heat source through the sensing gate And generate the sensing value of the heat source. The infrared sensor calibration device according to claim 3, wherein the temperature control box further includes a communication port, and the processor is electrically connected to the infrared temperature sensor through the communication port. The infrared sensor calibration device according to claim 1, wherein the processor further includes a storage unit, which stores the calibration gain relational expression. The infrared sensor calibration device as described in claim 1, wherein the processing calculation unit receives the ambient temperature of the infrared temperature sensor and calculates a calibration result from the correction gain relational expression, and the infrared temperature sensor Perform calibration based on the calibration result and sense the temperature of a test object to generate a sensing value, and the processing calculation unit receives the sensing value and performs imaging.

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