CN111024240A - Device and method for correcting temperature control shutter at two points - Google Patents
Device and method for correcting temperature control shutter at two points Download PDFInfo
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- CN111024240A CN111024240A CN201911372572.1A CN201911372572A CN111024240A CN 111024240 A CN111024240 A CN 111024240A CN 201911372572 A CN201911372572 A CN 201911372572A CN 111024240 A CN111024240 A CN 111024240A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000004044 response Effects 0.000 claims abstract description 57
- 238000012937 correction Methods 0.000 claims abstract description 36
- 238000010438 heat treatment Methods 0.000 claims abstract description 28
- 238000005057 refrigeration Methods 0.000 claims abstract description 26
- 238000012545 processing Methods 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims description 19
- 238000009529 body temperature measurement Methods 0.000 description 9
- 238000003384 imaging method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000005855 radiation Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000003331 infrared imaging Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
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- 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
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- 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
Abstract
A device and method for correcting a temperature control shutter at two points comprises a low-temperature shutter piece, a high-temperature shutter piece, a refrigeration module, a heating module, a first motion control module, a second motion control module, a first background acquisition module, a second background acquisition module and a processing module; the refrigeration module is used for controlling the temperature of the low-temperature shutter piece to be at a first preset temperature; the heating module is used for controlling the temperature of the high-temperature shutter piece to be at a second preset temperature; the first motion control module is used for moving the low-temperature shutter piece from the initial position to the infrared light path window; the second motion control module is used for moving the high-temperature shutter piece from the initial position to the infrared light path window; the first background acquisition module is used for acquiring the actual output response x of the background of the low-temperature shutter filmi(ii) a The second background acquisition module is used for acquiring the actual output response x of the background of the high-temperature shutter filmiB(ii) a The processing module is used for responding x by actual output of the background of the low-temperature shutter filmiAnd actual output response x of high temperature shutter film backgroundiBTwo-point correction is performed.
Description
Technical Field
The invention relates to the field of data correction and compensation of infrared detectors, in particular to a device and a method for correcting a temperature control shutter at two points.
Background
Due to the limitation of the manufacturing process of the infrared detector, the responsivity of each detection element of the infrared detector to infrared radiation is different, so that the phenomena of ghost and dead spots can occur on an imaging surface, and the imaging quality of the thermal imager is influenced. Ideally, when the infrared focal plane detector is irradiated by uniform light, the amplitudes of the video output signals of the pixels should be completely consistent. In fact, the video output amplitude is not uniform due to the influence of factors such as non-uniformity of semiconductor materials for manufacturing devices, non-uniformity of doping (ratio of various components), mask errors, and instability of control of the production process. That is, different video output signal amplitudes of different pixels of the infrared focal plane array under the same uniform incident radiation are caused to be different, which is called the non-uniformity of the infrared focal plane array response
At present, the non-uniformity seriously limits the imaging quality of an infrared imaging system, so that the non-uniformity correction of an infrared focal plane array to obtain a high-quality infrared image becomes one of the keys of the application of an infrared imaging technology; the current mature technical means of the non-uniformity correction is a two-point correction method (or multi-point correction: actually, multi-section two-point correction), data acquisition is carried out in advance in a stepping chamber or a high-low temperature chamber by adopting a black body and the like, data such as a dead pixel template and the like are stored, and dead pixel data are called according to the current temperature condition in the actual use process, so that the non-uniformity correction is carried out, and the imaging quality of a detector is improved.
In the prior art, when the running state of the equipment is consistent with the state of the collected data, the quality of the image corrected by the method is higher, but the environmental change of a flight thermal imager or a moving thermal imager such as a pod is very large and exceeds the range of a data template collected in advance or is inconsistent with the data collected in a static state, so that the imaging quality is greatly reduced, meanwhile, the collection of the corrected data in advance consumes quite long time, and huge manpower, financial resources and material resources are consumed for mass production equipment in data collection work.
Disclosure of Invention
In order to solve the technical problems, the invention provides a device and a method for correcting a temperature-controlled shutter at two points, which can perform two-point correction or multi-point correction in real time without consuming great energy to acquire data in advance, and can perform two-point correction or multi-point correction in real time according to the current environment, so that the image quality is higher, and the technical scheme of the invention is as follows:
as a first aspect of the present invention, a two-point temperature control shutter calibration device is provided, where the device includes a low-temperature shutter, a high-temperature shutter, a refrigeration module, a heating module, a first motion control module, a second motion control module, a first background acquisition module, a second background acquisition module, and a processing module;
the refrigeration module is used for controlling the temperature of the low-temperature shutter plate to enable the temperature of the low-temperature shutter plate to be at a first preset temperature;
the heating module is used for controlling the temperature of the high-temperature shutter piece to enable the temperature of the high-temperature shutter piece to be at a second preset temperature;
the first motion control module is used for moving the low-temperature shutter piece from the initial position of the low-temperature shutter piece to the infrared light route window or from the infrared light route window to the initial position of the low-temperature shutter piece;
the second motion control module is used for moving the high-temperature shutter piece from the initial position of the high-temperature shutter piece to the infrared light route window or from the infrared light route window to the initial position of the high-temperature shutter piece;
the first background acquisition module is used for moving to infrared light at the low-temperature shutterCollecting actual output response x of low-temperature shutter film background during road windowi；
The second background acquisition module is used for acquiring the actual output response x of the background of the high-temperature shutter piece when the high-temperature shutter piece moves to the infrared light path windowiB；
The processing module is used for responding x through actual output of the background of the low-temperature shutter filmiAnd actual output response x of high temperature shutter film backgroundiBTwo-point correction is performed.
Further, the processing module responds x through actual output of the low-temperature shutter piece backgroundiAnd actual output response x of high temperature shutter film backgroundiBThe two-point correction is specifically as follows:
calculating the slope k of the characteristic curve of the response characteristic of the detection unit i by the following formulai：
yi＝ki(xi-xiB)；
Wherein, yiThe slope k of the response characteristic curve of the detection unit i can be obtained by the formula for the expected output response of the detection unit iiThrough the slope k of the characteristic curveiAnd calculating the output response of the compensated current actual scene.
Further, the first preset temperature is T1, the second preset temperature is T2, T1 is the ambient temperature T0 of the current actual scene — the first preset temperature difference T3, and T2 is the ambient temperature T0+ the second preset temperature difference T4 of the current actual scene.
Furthermore, the device also comprises a first temperature measuring plate, a second temperature measuring plate, a third temperature measuring plate and a temperature control module,
the first temperature measuring plate is used for detecting the temperature of the low-temperature shutter piece;
the second temperature measuring plate is used for detecting the temperature of the high-temperature shutter piece;
the third temperature measuring plate is used for detecting the ambient temperature of the current actual scene;
the temperature control module is used for carrying out power control on the refrigerating module and the heating module according to the detected temperature of the low-temperature shutter piece, the detected temperature of the high-temperature shutter piece and the detected environment temperature of the current actual scene, so that the low-temperature shutter piece and the high-temperature shutter piece reach corresponding preset temperatures.
Further, the refrigeration module comprises a TEC refrigeration piece.
Further, the heating module includes a heating sheet.
Furthermore, the first motion control module is a low-temperature shutter motor, the second motion control module is a high-temperature shutter motor, and both the low-temperature shutter motor and the high-temperature shutter motor are connected with the processing module;
the processing module is also used for sending corresponding control instructions to the low-temperature shutter motor and the high-temperature shutter motor;
the low-temperature shutter motor is used for controlling the low-temperature shutter to move from the initial position of the low-temperature shutter to the infrared light route window or from the infrared light route window to the initial position of the low-temperature shutter according to the received control instruction;
and the high-temperature shutter motor is used for controlling the high-temperature shutter to move from the initial position of the high-temperature shutter to the infrared light route window or from the infrared light route window to the initial position of the high-temperature shutter according to the received control instruction.
As a second aspect of the present invention, there is provided a method of two-point correcting a temperature controlled shutter, the method comprising:
controlling the temperature of the low-temperature shutter plate to enable the temperature of the low-temperature shutter plate to be at a first preset temperature;
controlling the temperature of the high-temperature shutter plate to be at a second preset temperature;
when the low-temperature shutter piece moves to the infrared light path window, the actual output response x of the background of the low-temperature shutter piece is collectedi；
When the high-temperature shutter piece moves to the infrared light path window, the actual output response x of the background of the high-temperature shutter piece is collectediB；
Actual output response x through low temperature shutter film backgroundiAnd actual output response x of high temperature shutter film backgroundiBTwo-point correction is performed.
Further, the actual output response x through the low temperature shutter piece backgroundiAnd actual output response x of high temperature shutter film backgroundiBThe two-point correction is specifically as follows:
calculating the slope k of the characteristic curve of the response characteristic of the detection unit i by the following formulai：
yi＝ki(xi-xiB)；
Wherein, yiThe slope k of the response characteristic curve of the detection unit i can be obtained by the formula for the expected output response of the detection unit iiThrough the slope k of the characteristic curveiAnd calculating the output response of the compensated current actual scene.
Further, the first preset temperature is T1, the second preset temperature is T2, T1 is the ambient temperature T0 of the current actual scene — the first preset temperature difference T3, and T2 is the ambient temperature T0+ the second preset temperature difference T4 of the current actual scene.
The invention has the following beneficial effects:
1. the two-point correction temperature control shutter can acquire data in real time, performs two-point correction in real time, and is not influenced by complex and changeable environments;
2. the data acquisition time is saved, large-scale data acquisition work is not required to be carried out in advance, and the time and labor cost are saved;
3. the non-uniformity correction effect is good, and the temperature is controllable;
4. the cost is low.
Drawings
FIG. 1 is a block diagram of an apparatus for calibrating a temperature-controlled shutter at two points according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a heat sink and a heat dissipation fan according to an embodiment of the present invention;
FIG. 3 is a diagram of a structure of a heat-insulating cover plate and an infrared light path window provided in an embodiment of the present invention;
fig. 4 is a structural diagram of a TEC refrigeration plate and a heating plate according to an embodiment of the present invention.
Description of reference numerals: 1. low temperature shutter piece, 2, high temperature shutter piece, 3, first temperature measurement board, 4, second temperature measurement board, 4, first motion control module, 6, second motion control module, 7, first clamp, 8, second clamp, 9, structure fixed bolster, 10, radiator fan, 11, fin, 12, infrared light path window, 13, heat preservation apron, 14, TEC refrigeration piece, 15, heating plate, 16, third temperature measurement board.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 4, as a first aspect of the present invention, there is provided a two-point calibration temperature-controlled shutter apparatus, the apparatus includes a low-temperature shutter plate 1, a high-temperature shutter plate 2, a refrigeration module, a heating module, a first motion control module 5, a second motion control module 6, a first background acquisition module, a second background acquisition module, a first temperature measurement plate 3, a second temperature measurement plate 4, a third temperature measurement plate 16, a temperature control module, a processing module, and a structure fixing bracket 9 for fixing each module, wherein the first background acquisition module, the second background acquisition module, the temperature control module, and the processing module are all integrated on a main circuit board;
the refrigeration module is used for controlling the temperature of the low-temperature shutter piece 1, so that the temperature of the low-temperature shutter piece 1 is at a first preset temperature;
the heating module is used for controlling the temperature of the high-temperature shutter piece 2 so that the temperature of the high-temperature shutter piece 2 is at a second preset temperature;
the first motion control module 5 is configured to move the low-temperature shutter piece 1 from the initial position of the low-temperature shutter piece 1 to the infrared light routing window 12 or from the infrared light routing window 12 to the initial position of the low-temperature shutter piece 1;
the second motion control module 6 is configured to move the high-temperature shutter piece 2 from the initial position of the high-temperature shutter piece 2 to the infrared light routing window 12 or from the infrared light routing window 12 to the initial position of the high-temperature shutter piece 2;
the first background acquisition module is used for acquiring the actual output response x of the background of the low-temperature shutter piece 1 when the low-temperature shutter piece 1 moves to the infrared light path window 12i；
The second background acquisition module is used for acquiring the actual output response x of the background of the high-temperature shutter piece 2 when the high-temperature shutter piece 2 moves to the infrared light path window 12iB；
The processing module is used for responding x by actual output of the background of the low-temperature shutter piece 1iAnd actual output response x of the background of the high-temperature shutter piece 2iBTwo-point correction is performed.
The first preset temperature is T1, the second preset temperature is T2, T1 is the ambient temperature T0-a first preset temperature difference T3 of the current actual scene, and T2 is the ambient temperature T0+ a second preset temperature difference T4 of the current actual scene;
the first preset temperature difference T3 is preferably 10 degrees, the second preset temperature difference T4 is preferably 15 degrees, that is, the temperature of the low-temperature shutter piece 1 should be 10 degrees lower than the ambient temperature of the current actual scene, the temperature of the high-temperature shutter piece 2 should be 15 degrees higher than the ambient temperature of the current actual scene, and the temperature difference between the two is 25 degrees.
The first temperature measuring plate 3 is used for detecting the temperature of the low-temperature shutter piece 1; the second temperature measuring plate 4 is used for detecting the temperature of the high-temperature shutter piece 2; the third temperature measuring plate 16 is used for detecting the ambient temperature of the current actual scene; the temperature control module is used for performing power control on the refrigerating module and the heating module according to the detected temperature of the low-temperature shutter piece 1, the detected temperature of the high-temperature shutter piece 2 and the detected ambient temperature of the current actual scene, so that the low-temperature shutter piece 1 and the high-temperature shutter piece 2 reach corresponding preset temperatures, the temperature can be stable within 3-5 minutes of starting, and the time for opening the shutter is short, so that the temperature of the shutter piece moving from the initial position to the infrared light path window 12 or moving from the infrared light path window 12 to the initial position can be considered to be basically unchanged.
Preferably, the principle of the two-point correction is as follows:
calculating the slope k of the characteristic curve of the response characteristic of the detection unit i by the following formulai：
yi＝ki(xi-xiB)；
Wherein, yiThe slope k of the response characteristic curve of the detection unit i can be obtained by the formula for the expected output response of the detection unit iiThrough the slope k of the characteristic curveiAnd calculating the output response of the compensated current actual scene.
In addition, multi-point correction can be performed, which is actually a multi-stage two-point correction method.
Preferably, the refrigeration module comprises a TEC refrigeration sheet 14, the initial position of the low-temperature shutter sheet 1 is located at the TEC refrigeration sheet, the temperature of the low-temperature shutter sheet 1 is controlled by the TEC refrigeration sheet 14, and the low-temperature shutter sheet needs to move back and forth, so that a certain distance is kept between the low-temperature shutter sheet and the TEC refrigeration sheet, and the distance is preferably about 1mm, in order to avoid friction generated after the low-temperature shutter sheet and the TEC refrigeration sheet are attached to each other and further possibly cause other problems.
Preferably, the heating module comprises a heating plate 15, the initial position of the high-temperature shutter piece 2 is located at the heating plate 15, and the temperature of the high-temperature shutter piece 2 is controlled by the heating plate 15, and similarly, since the high-temperature shutter piece needs to move back and forth, in order to avoid friction after the high-temperature shutter piece is attached to the heating plate and other problems that may be caused, a distance of about 1mm is also maintained between the high-temperature shutter piece and the heating plate.
Wherein, TEC refrigeration piece 14, heating plate 15, low temperature shutter piece 1 and high temperature shutter piece 2 all are located heat preservation cover plate 13, guarantee that heating and refrigeration partial energy lose as far as possible, refrigerating plant still includes for the radiating fin 11 of TEC refrigeration piece 14 and radiator fan 10, because the position space in the light path is all narrower, and the radiating part ratio among the device of the invention accounts for the space than occupying, consequently can adopt modes such as heat pipe or liquid cooling return circuit to remove the heat to other positions and dispel the heat, specifically can be according to design heat radiation position such as each item demand.
Wherein, the initial position of low temperature shutter piece 1 is located TEC refrigeration piece 14, gives low temperature shutter piece 1 refrigeration through TEC refrigeration piece 14, the initial position of high temperature shutter piece 2 is located heating plate 15, heats for high temperature shutter piece 2 through heating plate 15, first temperature measurement board 3 can be installed on TEC refrigeration piece 14 or low temperature shutter piece 1, second temperature measurement board 4 can be installed on heating plate 15 or low temperature shutter piece 1, and third temperature measurement board 16 can be installed on the lateral wall of device.
Preferably, the first motion control module 5 is a low-temperature shutter motor, the second motion control module 6 is a high-temperature shutter motor, both the low-temperature shutter motor and the high-temperature shutter motor are connected with the processing module, the low-temperature shutter plate 1 is connected to an output shaft of the low-temperature shutter motor, the output shaft of the low-temperature shutter motor drives the low-temperature shutter plate 1 to move between the initial position and the infrared light path window 12, the high-temperature shutter plate 2 is connected to an output shaft of the high-temperature shutter motor, the output shaft of the high-temperature shutter motor drives the high-temperature shutter plate 2 to move between the initial position and the infrared light path window 12, the device further comprises a first clamp 7 for fixing the low-temperature shutter motor and a second clamp 8 for fixing the high-temperature shutter motor, the low-temperature shutter motor is fixed on the structure fixing support 9 through the first clamp 7, the high-temperature shutter motor is fixed on a structure fixing bracket 9 through a second hoop 8;
the processing module is also used for sending corresponding control instructions to the low-temperature shutter motor and the high-temperature shutter motor;
the low-temperature shutter motor is used for controlling the low-temperature shutter piece 1 to move from the initial position of the low-temperature shutter piece 1 to the infrared light path window 12 or from the infrared light path window 12 to the initial position of the low-temperature shutter piece 1 according to the received control instruction;
the high-temperature shutter motor is used for controlling the high-temperature shutter piece 2 to move from the initial position of the high-temperature shutter piece 2 to the infrared light path window 12 or from the infrared light path window 12 to the initial position of the high-temperature shutter piece 2 according to the received control instruction.
It should be noted that the low-temperature shutter piece 1 and the high-temperature shutter piece 2 in the embodiment of the present invention are arranged left and right, and in actual items, they may be arranged up and down, in tandem, rotationally, etc. according to requirements; in the embodiment of the invention, two-point correction or multi-section two-point correction is carried out by using two shutter pieces, and the design of a plurality of shutter pieces capable of being controlled by temperature can be carried out according to the requirement in actual projects; the temperature measuring plate in the embodiment of the invention adopts PCB temperature transmission, and can also select temperature transmission in other shapes, sizes and other modes such as thermistors or thermocouples according to requirements;
as a second aspect of the present invention, there is provided a method of two-point correcting a temperature controlled shutter, the method comprising:
controlling the temperature of the low-temperature shutter piece 1 to enable the temperature of the low-temperature shutter piece 1 to be at a first preset temperature;
controlling the temperature of the high-temperature shutter piece 2 to enable the temperature of the high-temperature shutter piece 2 to be at a second preset temperature;
when the low-temperature shutter piece 1 moves to the infrared light path window 12, the actual output response x of the background of the low-temperature shutter piece 1 is collectedi；
When the high-temperature shutter piece 2 moves to the infrared light path window 12, the actual output response x of the background of the high-temperature shutter piece 2 is collectediB；
Actual output response x through low temperature shutter piece 1 backgroundiAnd actual output response x of the background of the high-temperature shutter piece 2iBTwo-point correction is performed.
Preferably, the actual output response x through the background of the cryo-shutter plate 1iAnd actual output response x of the background of the high-temperature shutter piece 2iBThe two-point correction is specifically as follows:
calculating the slope k of the characteristic curve of the response characteristic of the detection unit i by the following formulai：
yi＝ki(xi-xiB)；
Wherein, yiThe slope k of the response characteristic curve of the detection unit i can be obtained by the formula for the expected output response of the detection unit iiThrough the slope k of the characteristic curveiCalculating the compensated output of the current actual sceneAnd (6) giving out a response.
Preferably, the first preset temperature is T1, the second preset temperature is T2, T1 is the ambient temperature T0 — the first preset temperature difference T3 of the current actual scene, and T2 is the ambient temperature T0+ the second preset temperature difference T4 of the current actual scene.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The device for correcting the temperature control shutter at two points is characterized by comprising a low-temperature shutter piece, a high-temperature shutter piece, a refrigerating module, a heating module, a first motion control module, a second motion control module, a first background acquisition module, a second background acquisition module and a processing module;
the refrigeration module is used for controlling the temperature of the low-temperature shutter plate to enable the temperature of the low-temperature shutter plate to be at a first preset temperature;
the heating module is used for controlling the temperature of the high-temperature shutter piece to enable the temperature of the high-temperature shutter piece to be at a second preset temperature;
the first motion control module is used for moving the low-temperature shutter piece from the initial position of the low-temperature shutter piece to the infrared light route window or from the infrared light route window to the initial position of the low-temperature shutter piece;
the second motion control module is used for moving the high-temperature shutter piece from the initial position of the high-temperature shutter piece to the infrared light route window or from the infrared light route window to the initial position of the high-temperature shutter piece;
the first background acquisition module is used for acquiring the actual output response x of the background of the low-temperature shutter piece when the low-temperature shutter piece moves to the infrared light path windowi；
The second background acquisition module is used for acquiring the actual output response x of the background of the high-temperature shutter piece when the high-temperature shutter piece moves to the infrared light path windowiB；
The processing module is used for passing through the low-temperature shutter pieceActual output response of background xiAnd actual output response x of high temperature shutter film backgroundiBTwo-point correction is performed.
2. The apparatus for two-point correction of a temperature controlled shutter according to claim 1, wherein the processing module responds to x by the actual output of the low temperature shutter plate backgroundiAnd actual output response x of high temperature shutter film backgroundiBThe two-point correction is specifically as follows:
calculating the slope k of the characteristic curve of the response characteristic of the detection unit i by the following formulai：
yi＝ki(xi-xiB)；
Wherein, yiThe slope k of the response characteristic curve of the detection unit i can be obtained by the formula for the expected output response of the detection unit iiThrough the slope k of the characteristic curveiAnd calculating the output response of the compensated current actual scene.
3. The apparatus for two-point correction of a temperature controlled shutter according to claim 1, wherein the first preset temperature is T1, the second preset temperature is T2, T1 is T0 — a first preset temperature difference T3, T2 is T0+ a second preset temperature difference T4.
4. The two-point calibration temperature controlled shutter device according to claim 3, further comprising a first temperature measuring plate, a second temperature measuring plate, a third temperature measuring plate and a temperature control module,
the first temperature measuring plate is used for detecting the temperature of the low-temperature shutter piece;
the second temperature measuring plate is used for detecting the temperature of the high-temperature shutter piece;
the third temperature measuring plate is used for detecting the ambient temperature of the current actual scene;
the temperature control module is used for carrying out power control on the refrigerating module and the heating module according to the detected temperature of the low-temperature shutter piece, the detected temperature of the high-temperature shutter piece and the detected environment temperature of the current actual scene, so that the low-temperature shutter piece and the high-temperature shutter piece reach corresponding preset temperatures.
5. The device for two-point calibration of a temperature controlled shutter according to claim 1, wherein the refrigeration module comprises a TEC refrigeration plate.
6. The device for two-point calibration of a temperature controlled shutter according to claim 1, wherein the heating module comprises a heating sheet.
7. The device for two-point calibration of a temperature controlled shutter according to claim 1, wherein the first motion control module is a low temperature shutter motor, the second motion control module is a high temperature shutter motor, and the low temperature shutter motor and the high temperature shutter motor are both connected to the processing module;
the processing module is also used for sending corresponding control instructions to the low-temperature shutter motor and the high-temperature shutter motor;
the low-temperature shutter motor is used for controlling the low-temperature shutter to move from the initial position of the low-temperature shutter to the infrared light route window or from the infrared light route window to the initial position of the low-temperature shutter according to the received control instruction;
and the high-temperature shutter motor is used for controlling the high-temperature shutter to move from the initial position of the high-temperature shutter to the infrared light route window or from the infrared light route window to the initial position of the high-temperature shutter according to the received control instruction.
8. A method of two-point correction of a temperature controlled shutter, the method comprising:
controlling the temperature of the low-temperature shutter plate to enable the temperature of the low-temperature shutter plate to be at a first preset temperature;
controlling the temperature of the high-temperature shutter plate to be at a second preset temperature;
when the low-temperature shutter piece moves to the infrared light path window, the actual output sound of the background of the low-temperature shutter piece is collectedShould xi；
When the high-temperature shutter piece moves to the infrared light path window, the actual output response x of the background of the high-temperature shutter piece is collectediB；
Actual output response x through low temperature shutter film backgroundiAnd actual output response x of high temperature shutter film backgroundiBTwo-point correction is performed.
9. The method for two-point correction of a temperature controlled shutter according to claim 8,
actual output response x through low temperature shutter film backgroundiAnd actual output response x of high temperature shutter film backgroundiBThe two-point correction is specifically as follows:
calculating the slope k of the characteristic curve of the response characteristic of the detection unit i by the following formulai：
yi＝ki(xi-xiB)；
Wherein, yiThe slope k of the response characteristic curve of the detection unit i can be obtained by the formula for the expected output response of the detection unit iiThrough the slope k of the characteristic curveiAnd calculating the output response of the compensated current actual scene.
10. The method for two-point correction of a temperature controlled shutter according to claim 8, wherein the first preset temperature is T1, the second preset temperature is T2, T1 is the ambient temperature T0 of the current actual scene — the first preset temperature difference T3, and T2 is the ambient temperature T0+ the second preset temperature difference T4 of the current actual scene.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113532664A (en) * | 2021-07-22 | 2021-10-22 | 合肥英睿系统技术有限公司 | Method, device and medium for acquiring infrared image non-uniformity correction K coefficient |
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