Aerial camera intelligent temperature control device and method

Abstract

The present invention relates to the technical field of intelligent temperature control for aerial cameras, and more specifically, to an intelligent temperature control device and method for aerial cameras, comprising: a temperature sensing unit, a central processing unit, a heating drive unit, and a heating execution unit, wherein the temperature sensing unit, the central processing unit, the heating drive unit, and the heating execution unit are sequentially connected. In the present invention, multiple heating execution units are disposed at multiple locations on an optical element in the aerial camera. The temperature sensing unit collects the temperatures at the locations of the multiple heating execution units. The central processing unit controls the heating drive unit based on the temperatures collected by the temperature sensing unit to drive the multiple heating execution units to selectively heat the multiple locations on the optical element in the aerial camera, thereby facilitating targeted heating and reducing system complexity.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent temperature control for aerial cameras, and in particular to an intelligent temperature control device and method for aerial cameras. Background Art

[0002] Aerial cameras are widely used in both military and civilian applications. Temperature fluctuations can alter the radius of curvature of optical components and the refractive index of air between lenses, affecting image quality. Therefore, aerial cameras must maintain consistent temperatures across all optical components during operation. This requires a temperature control device. Common temperature control devices use thermistors to measure the heating temperature and quantify it via an analog-to-digital converter. Each thermistor requires a set of leads to connect to the temperature control device. Large aerial cameras can require dozens or even hundreds of temperature measurement channels, requiring dozens or even hundreds of leads and multiple analog-to-digital converters, increasing system complexity.

[0003] Aerial camera temperature control devices typically use the onboard +28V power supply, also known as the primary power supply. This power supply often contains various fluctuations and interferences. The secondary power supply required for the internal circuit operation of the temperature control device must be as clean as possible, so the primary and secondary power supplies need to be isolated.

[0004] The working environment of aerial cameras is generally low. Since they are equipped with temperature control devices inside, and the temperature control level is generally higher than the external ambient temperature, a temperature difference is generated between the inside and outside of the optical window glass of the aerial camera. When the internal hot air meets the cold optical window glass, condensation and fogging will occur, thereby affecting the imaging quality of the aerial camera. Summary of the Invention

[0005] The embodiments of the present invention provide an intelligent temperature control device and method for an aerial camera, which at least solve the technical problem of inconsistent temperature levels of various optical elements in existing optical systems.

[0006] According to one embodiment of the present invention, an intelligent temperature control device for an aerial camera is provided, comprising: a temperature sensing unit, a central processing unit, a heating drive unit, and a heating execution unit, wherein the temperature sensing unit, the central processing unit, the heating drive unit, and the heating execution unit are connected in sequence, wherein:

[0007] Multiple heating execution units are respectively arranged at multiple positions of the optical element in the aerial camera, and the temperature sensing unit collects the temperatures of the positions where the multiple heating execution units are located. The central processing unit controls the heating driving unit to drive the multiple heating execution units to selectively heat the optical element in the aerial camera at multiple positions based on the temperatures of the multiple positions collected by the temperature sensing unit.

[0008] Furthermore, the device also includes: a fan drive unit and an anti-condensation fan; the central processing unit, the fan drive unit and the anti-condensation fan are connected in sequence, and the central processing unit controls the fan drive unit to drive the anti-condensation fan to blow air to the optical window glass in the aerial camera.

[0009] Furthermore, one optical element in the aerial camera is a heating zone, and each heating zone is provided with a temperature sensing unit, which is a digital temperature sensor.

[0010] Furthermore, the heating drive unit includes a MOS tube, a current limiting resistor, a voltage dividing resistor and a photoelectric coupler; wherein:

[0011] The drain D of the MOS tube is connected to the power supply return line of the heating execution unit, and the source S is connected to the ground of the onboard +28V primary power supply. The on and off of the MOS tube is used to control the on and off of the power supply of the heating execution unit;

[0012] One end of the current limiting resistor is connected to the onboard +28V primary power supply of the heating execution unit power supply end, and the other end is connected to the gate G of the MOS tube, the 5th pin of the photocoupler and one end of the voltage divider resistor;

[0013] The other end of the voltage divider resistor is connected to the source S of the MOS tube, the 4th pin of the photocoupler and the onboard +28V primary power ground of the heating execution unit power supply line;

[0014] Pin 1 of the optocoupler is the input terminal of the light-emitting diode, pin 2 is the output terminal of the light-emitting diode, pin 5 is the input terminal of the phototransistor, and pin 4 is the output terminal of the phototransistor; pin 1 of the optocoupler is connected to the I / O of the central processing unit to receive the heating control signal sent by the central processing unit. The heating control signal is a logic level with two states of '0' and '1', and pin 4 is connected to the logic level return line.

[0015] Furthermore, the heating execution unit is a resistance wire heating plate.

[0016] Furthermore, the temperature sensing unit includes 8 digital temperature sensors, which respectively collect the temperatures of 8 heating positions of the optical element; the digital temperature sensors 1 to 8 are powered in series by a power supply lead VCC and a power supply return line GND; the data lines of the digital temperature sensors 1 to 8 are connected to the same data bus, which is connected to the central processing unit. The digital temperature sensors 1 to 8 have a unique ID, and the central processing unit identifies the data transmitted on the bus through the ID.

[0017] Furthermore, an optical element is provided with 8 heating zones, and each heating zone is provided with a heating execution unit, namely, a heating execution unit at the front end of the main mirror of the optical element, a heating execution unit at the rear end of the main mirror of the optical element, a heating execution unit at the left end of the main mirror of the optical element, a heating execution unit at the right end of the main mirror of the optical element, a heating execution unit at the secondary mirror of the optical element, a heating execution unit at the third mirror of the optical element, a heating execution unit at the focusing mirror of the optical element, and a heating execution unit at the returning mirror of the optical element.

[0018] Furthermore, the fan driving unit is a solid-state relay.

[0019] Furthermore, the anti-condensation fan is a DC fan, and a heating wire is provided at the air outlet end thereof.

[0020] According to another embodiment of the present invention, a method for intelligent temperature control of an aerial camera is provided, comprising the following steps:

[0021] The central processing unit reads the ID of each digital temperature sensor in the temperature sensing unit and stores it in the on-chip ROM of the central processing unit;

[0022] The central processing unit sends a start acquisition instruction to the digital temperature sensor of each ID through the data bus. The instruction is "ID+start acquisition". The digital temperature sensor starts working and collects temperature.

[0023] The central processing unit sends a reading instruction to each digital temperature sensor via the data bus. The instruction is "ID+start reading" to read the temperature collected by each digital temperature sensor.

[0024] The central processing unit compares the temperature collected by each digital temperature sensor with the default temperature value pre-stored in the on-chip ROM. If the temperature collected by the digital temperature sensor is lower than the default temperature, the central processing unit sends a logic '0' to the heating drive unit, and the heating execution unit starts heating. If the temperature collected by the digital temperature sensor is higher than the default temperature, the central processing unit sends a logic '1' to the heating drive unit, and the heating execution unit stops heating.

[0025] A storage medium stores a program file capable of implementing the above-mentioned intelligent temperature control method for an aerial camera.

[0026] A processor is used to run a program, wherein the program executes the above-mentioned intelligent temperature control method for an aerial camera when running.

[0027] In the intelligent temperature control device and method for an aerial camera in an embodiment of the present invention, multiple heating execution units are respectively arranged at multiple positions of the optical element in the aerial camera. A temperature sensing unit collects the temperatures of the positions where the multiple heating execution units are located. The central processing unit controls the heating drive unit to drive the multiple heating execution units to selectively heat the optical element in the aerial camera at multiple positions based on the temperatures of the multiple positions collected by the temperature sensing unit, thereby facilitating targeted heating and reducing system complexity. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0029] Figure 1 This is a principle block diagram of an intelligent temperature control device for an aerial camera according to the present invention;

[0030] Figure 2 This is a principle block diagram of the temperature sensing unit in the present invention;

[0031] Figure 3 This is a principle block diagram of the heating drive unit in the present invention;

[0032] Figure 4 It is a schematic diagram of the position of the heating execution unit in the present invention;

[0033] Figure 5 The present invention is a flow chart of an intelligent temperature control method for an aerial camera. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0035] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0036] Figure 1 This is a block diagram of the principle of an intelligent temperature control device for an aerial camera provided by an embodiment of the present invention, comprising: a temperature sensing unit 1, a central processing unit 2, a heating drive unit 3, a fan drive unit 4, an anti-condensation fan 5, and a heating execution unit 6. Among them:

[0037] A temperature sensing unit 1 is provided in each heating zone to collect the temperature of the heating zone in real time; preferably, the temperature sensing unit 1 adopts a digital temperature sensor, which can directly output a digital signal of the temperature value.

[0038] Connected to the temperature sensing unit 1 is a central processing unit 2 for receiving temperature information sent by the temperature sensing unit 1 , sending a heating control signal to the heating drive unit 3 , and sending a fan drive signal to the fan drive unit 4 .

[0039] Connected to the central processing unit 2 is a heating drive unit 3 for receiving a heating control signal from the central processing unit 2 and controlling the conduction of the power supply of the heating execution unit 6 according to the heating control signal.

[0040] Connected to the central processing unit 2 is a fan driving unit 4 for receiving a fan driving signal from the central processing unit 2 and controlling the conduction of the power supply of the anti-condensation fan 5 according to the fan driving signal.

[0041] Optionally, the fan drive unit 4 is a solid-state relay.

[0042] Connected to the fan drive unit 4 is the anti-condensation fan 5, which is mainly a DC fan. A heating wire is provided at the air outlet end to make the blown air hot air. After the fan drive unit 4 controls the anti-condensation fan 5 to power on, the anti-condensation fan 5 starts to rotate and blows air to the optical window glass. Since the wind is hot air, the temperature of the optical window glass rises, thereby preventing the hot air in the pod from encountering the cold glass and causing condensation.

[0043] Connected to the temperature sensing unit 1 is the heating execution unit 6, which is mainly a resistance wire heating plate. A heating plate is set in each heating area to convert electrical energy into thermal energy. Multiple heating execution units 6 are set according to the number of optical elements. Each heating execution unit 6 is placed at each optical element to heat the area where the heating execution unit 6 is located. In this embodiment, the heating execution unit 6 is powered by an onboard +28V primary power supply.

[0044] Figure 2 This is a block diagram of the principle of a temperature sensing unit 1 according to an embodiment of the present invention. The unit 1 is composed of multiple digital temperature sensors. In this embodiment, eight digital temperature sensors are provided to respectively collect the temperatures of eight heating positions of the optical element. The digital temperature sensors 1-8 are powered in series by a power supply lead VCC and a power return line GND. The data lines of the digital temperature sensors 1-8 are connected to the same data bus, which is connected to the central processing unit 2. The digital temperature sensors 1-8 have a unique ID, and the central processing unit 2 uses this ID to identify the data transmitted on the bus.

[0045] Figure 3 3 is a principle block diagram of the heating drive unit 3 according to an embodiment of the present invention, which is composed of a MOS tube 31 , a current limiting resistor 32 , a voltage dividing resistor 33 and a photoelectric coupler 34 .

[0046] The drain D of the MOS tube 31 is connected to the power supply return line of the heating execution unit 6, and the source S is connected to the ground of the onboard +28V primary power supply. The on and off of the MOS tube 31 is used to control the on and off of the power supply to the heating plate.

[0047] One end of the current limiting resistor 32 is connected to the onboard +28V primary power supply of the heater power supply end, and the other end is connected to the gate G of the MOS tube 31, the 5th pin of the photocoupler 34 and one end of the voltage divider resistor 33.

[0048] The other end of the voltage-dividing resistor 33 is connected to the source S of the MOS transistor 31 , the 4th pin of the photocoupler 34 and the ground of the onboard +28V primary power supply of the heater power supply return line.

[0049] The photocoupler 34 has pin 1 as the light-emitting diode input terminal, pin 2 as the light-emitting diode output terminal, pin 5 as the phototransistor input terminal, and pin 4 as the phototransistor output terminal. Pin 1 of the photocoupler 34 is connected to the I / O of the central processing unit 2 to receive the heating control signal sent by the central processing unit 2. The heating control signal is a logic level with two states of '0' and '1'. Pin 4 is connected to the logic level return line.

[0050] The working principle of the heating drive unit 3 is as follows: the photoelectric coupler 34 receives the heating control signal sent by the central processing unit 2. When the heating control signal is '1', the light-emitting diode in the photoelectric coupler 34 is turned on, and the photosensitive transistor is also turned on after receiving the light emitted by the light-emitting diode. The power supply current of the heating execution unit 6 flows through the current-limiting resistor 32 and the photosensitive transistor, and then directly returns to the power supply loop. No current flows through the voltage-dividing resistor 33, so the voltage across it is 0. The two ends of the voltage-dividing resistor 33 are respectively connected to the gate G and source S of the MOS tube 31. The voltage across G and S of the MOS tube 31 is 0. The MOS tube 31 is not turned on, and the heating execution unit 6 is not powered and does not heat. On the contrary, when the heating control signal sent by the central processing unit 2 is '0', the MOS tube 31 is turned on, the heating execution unit 6 is powered, and heating starts.

[0051] Figure 4 3 is a schematic diagram of the specific position of the heating execution unit 6 of an embodiment of the present invention. In this embodiment, a total of 8 heating zones are set, and each heating zone is provided with a heating execution unit, which are a heating execution unit 61 at the front end of the main mirror of the optical element, a heating execution unit 62 at the rear end of the main mirror of the optical element, a heating execution unit 63 at the left end of the main mirror of the optical element, a heating execution unit 64 at the right end of the main mirror of the optical element, a heating execution unit 65 at the secondary mirror of the optical element, a heating execution unit 66 at the third mirror of the optical element, a heating execution unit 67 at the focusing mirror of the optical element, and a heating execution unit 68 at the returning mirror of the optical element.

[0052] Figure 5 The present invention provides a flow chart of an intelligent temperature control method for an aerial camera, including:

[0053] Step 1: The central processing unit 2 reads the ID of each digital temperature sensor in the temperature sensing unit 1 and stores it in the on-chip ROM of the central processing unit;

[0054] Step 2: The central processor 2 sends a start acquisition instruction to the digital temperature sensor of each ID through the data bus. The instruction is "ID+start acquisition". The digital temperature sensor starts working and collects temperature.

[0055] Step 3: The central processor 2 sends a read instruction to the digital temperature sensor of each ID through the data bus. The instruction is "ID+start reading", and reads the temperature collected by each digital temperature sensor;

[0056] Step 4: Compare the temperature collected by each digital temperature sensor with the default temperature value pre-stored in the on-chip ROM. If the temperature collected by the digital temperature sensor is lower than the default temperature, the central processor 2 sends a logic '0' to the heating drive unit 3, and the heating plate starts heating. If the temperature collected by the digital temperature sensor is higher than the default temperature, the central processor 2 sends a logic '1' to the heating drive unit 3, and the heating plate stops heating.

[0057] The beneficial effects of the present invention are as follows: the present invention provides an intelligent temperature control device and method for an aerial camera, which adopts a digital temperature sensor in the form of a single bus, reduces the number of leads and does not require an analog / digital converter, thereby reducing system complexity; at the same time, a photoelectric coupler 34 is used to isolate and drive the MOS tube 31 to control the conduction of the heating plate, effectively isolating the primary power supply from the secondary power supply line, and avoiding interference introduced by the primary power supply to the system; at the same time, an anti-condensation fan 5 is designed, which can effectively avoid the condensation and fogging phenomenon caused by the optical window glass of the aerial camera, thereby affecting the imaging quality.

[0058] A storage medium stores a program file capable of implementing the above-mentioned intelligent temperature control method for an aerial camera.

[0059] A processor is used to run a program, wherein the program executes the above-mentioned intelligent temperature control method for an aerial camera when running.

[0060] The serial numbers of the above embodiments of the present invention are for description only and do not represent the advantages or disadvantages of the embodiments.

[0061] In the above embodiments of the present invention, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0062] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the system embodiments described above are only exemplary. For example, the division of units can be a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0063] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple units. Some or all of the units may be selected to achieve the purpose of the present embodiment according to actual needs.

[0064] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0065] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server or network device, etc.) to execute all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk, etc. Various media that can store program codes.

[0066] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An intelligent temperature control device for an aerial camera, characterized in that: include: The temperature sensing unit, the central processing unit, the heating drive unit, and the heating execution unit are connected in sequence, wherein: The plurality of heating execution units are respectively disposed at multiple locations of an optical element in an aerial camera, the temperature sensing unit collects temperatures at the locations of the plurality of heating execution units, and the central processing unit controls the heating driving unit to drive the plurality of heating execution units to selectively heat the multiple locations of the optical element in the aerial camera based on the temperatures at the multiple locations collected by the temperature sensing unit; The temperature sensing unit includes eight digital temperature sensors, which respectively collect temperatures at eight heating positions of the optical element and directly output digital temperature signals. The digital temperature sensors 1 to 8 are powered in series by a power supply lead VCC and a power return line GND. The data lines of the digital temperature sensors 1 to 8 are connected to the same data bus, which is connected to the central processing unit. The digital temperature sensors 1 to 8 have unique IDs, and the central processing unit identifies data transmitted on the bus through the IDs. The central processing unit sends a start collection instruction to the digital temperature sensor of each ID via the data bus, and the digital temperature sensor starts working and collecting temperature. The central processing unit sends a read instruction to the digital temperature sensor of each ID via the data bus to read the temperature collected by each digital temperature sensor.

2. The intelligent temperature control device for an aerial camera according to claim 1, characterized in that: The device also includes: a fan drive unit and an anti-condensation fan; the central processing unit, the fan drive unit, and the anti-condensation fan are connected in sequence, and the central processing unit controls the fan drive unit to drive the anti-condensation fan to blow air to the optical window glass in the aerial camera.

3. The intelligent temperature control device for an aerial camera according to claim 1, characterized in that: One optical element in the aerial camera is a heating zone, and each heating zone is provided with a temperature sensing unit, which adopts a digital temperature sensor.

4. The intelligent temperature control device for an aerial camera according to claim 1, characterized in that: The heating drive unit includes a MOS tube, a current limiting resistor, a voltage dividing resistor and a photoelectric coupler; wherein: The drain D of the MOS tube is connected to the power supply return line of the heating execution unit, and the source S is connected to the ground of the onboard +28V primary power supply. The on and off of the MOS tube is used to control the on and off of the power supply of the heating execution unit; One end of the current-limiting resistor is connected to the onboard +28V primary power supply of the heating execution unit power supply end, and the other end is connected to the gate G of the MOS tube, the 5th pin of the photoelectric coupler and one end of the voltage divider resistor; The other end of the voltage divider resistor is connected to the source S of the MOS tube, the 4th pin of the photoelectric coupler and the onboard +28V primary power ground of the power supply return line of the heating execution unit; Pin 1 of the photocoupler is the input terminal of the light-emitting diode, pin 2 is the output terminal of the light-emitting diode, pin 5 is the input terminal of the phototransistor, and pin 4 is the output terminal of the phototransistor; pin 1 of the photocoupler is connected to the I / O of the central processing unit to receive the heating control signal sent by the central processing unit. The heating control signal is a logic level with two states of '0' and '1', and pin 4 is connected to the logic level return line.

5. The intelligent temperature control device for an aerial camera according to claim 1, characterized in that: The heating execution unit is a resistance wire heating plate.

6. The intelligent temperature control device for an aerial camera according to claim 1, characterized in that: An optical element is provided with 8 heating zones, and each heating zone is provided with a heating execution unit, namely, a heating execution unit at the front end of the optical element main mirror, a heating execution unit at the rear end of the optical element main mirror, a heating execution unit at the left end of the optical element main mirror, a heating execution unit at the right end of the optical element main mirror, a heating execution unit at the secondary mirror of the optical element, a heating execution unit at the third mirror of the optical element, a heating execution unit at the focusing mirror of the optical element, and a heating execution unit at the returning mirror of the optical element.

7. The intelligent temperature control device for an aerial camera according to claim 2, characterized in that: The fan drive unit is a solid-state relay.

8. The intelligent temperature control device for an aerial camera according to claim 2, characterized in that: The anti-condensation fan is a DC fan, and a heating wire is provided at the air outlet end thereof.

9. An intelligent temperature control method for an aerial camera using the intelligent temperature control device for an aerial camera according to any one of claims 1 to 8, characterized in that: The following steps are involved: The central processing unit reads the ID of each digital temperature sensor in the temperature sensing unit respectively and stores it in the on-chip ROM of the central processing unit; The central processor sends a start acquisition instruction to the digital temperature sensor of each ID through the data bus. The instruction is "ID+start acquisition", and the digital temperature sensor starts working to collect temperature; The central processing unit sends a read instruction to the digital temperature sensor of each ID through the data bus. The instruction is "ID+start reading" to read the temperature collected by each digital temperature sensor; The central processing unit compares the temperature collected by each digital temperature sensor with the default temperature value pre-stored in the on-chip ROM. If the temperature collected by the digital temperature sensor is lower than the default temperature, the central processing unit sends a logic '0' to the heating drive unit, and the heating execution unit starts heating. If the temperature collected by the digital temperature sensor is higher than the default temperature, the central processing unit sends a logic '1' to the heating drive unit, and the heating execution unit stops heating.

Images