Serialized black body control system

Abstract

The invention discloses a serialized blackbody control system, which comprises a temperature control and acquisition unit, a power driving unit, a power device, a power module unit, a man-machine interaction unit and an interface unit, and is characterized in that the power device adopts a single ceramic flat-plate semiconductor refrigeration device as a standard and is positioned on the back surface of a blackbody radiant panel; temperature acquisition and temperature control functions of the blackbody radiation source are respectively completed; controlling the power of the power device; providing a human-computer interaction interface; a temperature control and acquisition unit, a power supply module and a power driving unit form a control assembly module, and interfaces of the three units and an installation fixing support are standardized. The method can achieve the universal control of the serialized blackbody, and can shorten the design period of the serialized blackbody.

Description

Technical Field

[0001] The invention relates to the technical field of blackbody product control systems, and in particular to the realization of a control system for serialized blackbody products. Background Art

[0002] At present, with the development of science and technology, the application of infrared imaging technology is becoming more and more extensive. Whether in military or civilian application fields, it provides great convenience for production and life. As a standard calibration source for radiation calibration in the infrared field, blackbody can provide calibration of radiation values ​​for infrared detection systems. Therefore, blackbody has a wide range of application space and prospects, and has a large market demand in my country.

[0003] The performance requirements for black bodies during calibration tests of current infrared detection equipment are not the same. In particular, the performance requirements for the black body's radiation surface area, temperature control range, heating and cooling rates, etc. are quite different, resulting in different infrared detection equipment requiring the use of different black bodies for testing. However, the commonality and standardization of black body components are low, and there are characteristics such as long design cycles, many types of component processing and procurement, difficulty in organizing batch production, and long production preparation cycles, which are not conducive to the development and iteration of black body products. Moreover, in traditional black body control systems, power devices are mostly customized, and their working reliability and product consistency are poor, which seriously affects the performance of the black body. Summary of the invention

[0004] The present invention provides a serialized blackbody control system, which can realize universal control of serialized blackbodies, thereby shortening the serialized blackbody design cycle and solving the problem of inconsistency in blackbody product models.

[0005] The technical solution of the present invention includes a temperature control and acquisition unit, a power drive unit, a power device, a power module unit, a human-computer interaction unit, and an interface unit;

[0006] The temperature control and acquisition unit completes the temperature acquisition and temperature control functions of the blackbody radiation source, and the power drive unit realizes the power control of the power device; the power device is located on the back of the blackbody radiation board, the power module unit provides energy input for the entire control system, and the human-computer interaction unit provides a human-computer interaction interface;

[0007] The temperature control and acquisition unit collects the target and background temperatures to achieve two control modes: absolute temperature control and differential temperature control;

[0008] The power device adopts a single ceramic flat-plate semiconductor refrigeration device as standard, which is located on the back of the blackbody radiation plate;

[0009] The power drive unit semiconductor refrigerator driver adopts H-bridge circuit, which performs feedback adjustment according to the difference between the temperature measured by the temperature sensor and the set target temperature. The voltage control signal is output through the D / A module and linearly converted into a PWM signal as the input of the power amplifier chip on the drive circuit to perform power amplification and control the size and direction of the current of the drive circuit.

[0010] The temperature control and acquisition unit, power module, and power drive unit are combined into a control component module, and the interfaces and mounting brackets of the three are standardized;

[0011] The interface unit provides the connection to the blackbody radiation source.

[0012] The present invention realizes the control of serialized black bodies based on modularization, standardization and serialization ideas and methods, which is beneficial to the specialized production of black bodies. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The included drawings are used to provide a further understanding of the embodiments of the present invention, which constitute a part of the specification, are used to illustrate the embodiments of the present invention, and together with the text description, explain the principles of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 It is the control principle block diagram of the present invention;

[0015] Figure 2 A schematic diagram of a single power device in the present invention;

[0016] Figure 3 It is a schematic diagram of the connection of several power devices in the present invention;

[0017] Figure 4 The human-computer interaction interface of the present invention

[0018] Figure 5 A physical diagram of the present invention DETAILED DESCRIPTION

[0019] The following will be combined with the accompanying drawings in the embodiments of the present invention.

[0020] According to the specific implementation of the present invention, a series of blackbody control systems are provided, and the principle block diagram is as follows: Figure 1As shown, the device described in the control system includes a temperature control and acquisition unit, a power drive unit, a power device, a power module unit, a human-machine interaction unit, and an interface unit. Among them, the temperature control and acquisition unit completes the temperature acquisition and temperature control functions of the blackbody radiation source, and the power drive unit realizes the power amplification of the power device; the power device is located on the back of the blackbody radiation board and is the main working surface, the power module unit provides energy input for the entire control system, and the human-machine interaction unit can provide a friendly human-machine interaction interface for easy operator use; the interface unit provides a connection between the control box and the blackbody radiation source (blackbody radiation board).

[0021] The temperature control and acquisition unit is the main temperature control component of the control system. It is developed based on embedded system technology and has the advantages of high efficiency, reliability and stability. It can support PT100 thermal resistor (2 channels) and thermocouple (2 channels) input channels. By configuring and selecting, it can meet the real-time temperature acquisition function of black bodies in different temperature ranges, expand its application range, and greatly improve its versatility. At the same time, the 2-channel input channel can realize the acquisition of target and background temperatures, realize the two modes of absolute temperature control and differential temperature control, and realize the simultaneous acquisition of ambient temperature, which improves the accuracy of black body temperature control. According to the size of the black body radiation surface, the required number of unit modules can be freely selected, and an RS485 control network is formed, and the radiation surface is divided into different areas for temperature control by a single human-computer interaction interface. In addition, the temperature control and acquisition unit is designed on a PCB board, the module unit size and interface are the same, and a universal mounting fixture is used, which can quickly realize the networking of different numbers of unit modules, which is conducive to large-scale production.

[0022] The power device adopts a single ceramic flat plate semiconductor refrigeration device (size 40mm×40mm×2mm) as the standard, such as Figure 2 As shown. A splicing power device solution is adopted, the substrate at the bottom of the flat semiconductor cooling device is processed into a terminal installation groove, and the connecting terminals used for splicing are welded to the substrate by laser welding. According to the diameter of the black body radiation surface, several cooling devices are connected through the terminals (in series or in parallel) to form a semiconductor cooling device matrix, and then power devices of different areas are formed, such as Figure 3 shown.

[0023] In the present invention, the main functions of the high-precision temperature controller are to load a constant current to the high-precision temperature sensor, convert the resistance change of the sensor into a voltage signal change to reflect the temperature change; process the voltage signal, filter out the stray high-frequency interference noise and power frequency interference noise in the signal, and amplify the weak signal for easy collection; the microprocessor performs feedback adjustment according to the difference between the temperature measured by the temperature sensor and the set target temperature. The voltage control signal is output through the D / A module. The semiconductor refrigerator drive adopts an H-bridge circuit to convert the linearity of the 0-10V analog voltage signal of the high-precision temperature control board into a PWM signal output with a duty cycle of 0% to 100%. The PWM signal is used as the input of the power amplifier chip on the drive circuit for power amplification, which can control the size and direction of the current of the drive circuit. The power control of the power device can be achieved through the cooperation of the two.

[0024] The control system interface unit is designed in a standardized way, and function expansion interfaces are reserved, such as target wheel control, light source control interface, etc. The expansion interface is closed when not in use. When in use, the interface can be opened to provide an interface for the function in use. Such as the target wheel motor control interface, communication interface, target simulator interface, etc. The interface unit provides the connection between the control box and the blackbody radiation source. The interface unit is designed in a universal and standardized way, and the controller expansion interface is reserved. The types and quantity of interface units are clarified, and the layout is reasonable, and the interface pin definition is specified.

[0025] The human-computer interaction unit can provide a friendly human-computer interaction interface, such as Figure 4 As shown, it is convenient for operators to use. The human-machine interaction unit adopts configuration screen technology, which is easy to develop secondary programs. The human-machine interaction interface is software-solidified according to the bold control function module, and interfaces for other functions are reserved.

[0026] The temperature control and acquisition unit, power drive unit, power device, power module unit, human-machine interaction unit, and interface unit are installed and fixed in a control box. The control components are modularly designed to reduce the total number of parts and components. The blackbody controller product components are decomposed into relatively independent functional units according to functional characteristics. The temperature control and acquisition unit, power module, and power drive unit form a control component module, and the interfaces and mounting brackets of the three are standardized to make them interchangeable. In this way, the corresponding standard modules can be combined according to the different partition control schemes and working power requirements of the blackbody. Through different combinations of control component modules and then combined with other components, the control requirements of the blackbody in the series spectrum can be adapted to meet the needs of different control systems.

[0027] The actual figure of the present invention is as follows Figure 5As shown, the style of the control system chassis is designed in series. On the premise of meeting the functional requirements, the control chassis product shape is beautified, the recognition of the control system chassis is improved, and a good product image is established.

[0028] Each unit of the control system has been optimized through serialization and modularization, which is convenient for the rapid combination and use of various functional modules. The use of this control system reduces the R&D process of black bodies of different spectra and meets the requirements of different users for black body varieties and specifications. The production batch is expanded, which is particularly conducive to specialized production and promotion of new technologies, reducing labor costs and improving work efficiency.

[0029] The many features and advantages of these embodiments are apparent from this detailed description, and thus the appended claims are intended to cover all such features and advantages of these embodiments that fall within their true spirit and scope. Furthermore, since numerous modifications and changes will readily occur to those skilled in the art, it is not intended that the embodiments of the invention be limited to the exact construction and operation illustrated and described, but rather all suitable modifications and equivalents falling within the scope thereof are intended to be covered.

[0030] Parts of the present invention that are not described in detail are well known to those skilled in the art.

Claims

1. A serialized blackbody control system, characterized in that include: Temperature control and acquisition unit, power drive unit, power device, power module unit, human-computer interaction unit, interface unit; The temperature control and acquisition unit completes the temperature acquisition and temperature control functions of the blackbody radiation source, and the power drive unit realizes the power control of the power device; the power device is located on the back of the blackbody radiation board, the power module unit provides energy input for the entire control system, and the human-computer interaction unit provides a human-computer interaction interface; The temperature control and acquisition unit acquires target and background temperatures to achieve two control modes: absolute temperature control and differential temperature control; The power device adopts a single ceramic flat-plate semiconductor refrigeration device as a standard and is located on the back of the blackbody radiation plate; The power drive unit semiconductor refrigerator is driven by an H-bridge circuit, which performs feedback adjustment according to the difference between the temperature measured by the temperature sensor and the set target temperature, outputs a voltage control signal through a D / A module, and linearly converts it into a PWM signal as the input of the power amplifier chip on the drive circuit, performs power amplification, and controls the magnitude and direction of the current of the drive circuit; The temperature control and acquisition unit, power module, and power drive unit are combined into a control component module, and the interfaces and mounting brackets of the three are standardized; The interface unit provides a connection to a black body radiation source.

2. A serialized blackbody control system as claimed in claim 1, characterized in that According to the size of the blackbody radiation surface, the required number of temperature control and acquisition unit modules can be freely selected, and an RS485 control network is formed. The radiation surface is divided into different areas for temperature control through a single human-machine interaction interface.

3. A serialized blackbody control system as claimed in claim 2, characterized in that The temperature control and acquisition unit is designed on a PCB board, the module units have the same size and interface, and use universal installation fixtures to quickly realize the networking of different numbers of the unit modules.

4. A serialized blackbody control system as claimed in claim 1, characterized in that The power device adopts a splicing power device solution, in which the base plate at the bottom of the base plate is processed with a terminal installation groove, and the connecting terminals used for splicing are welded to the base plate. According to the aperture of the black body radiation surface, several cooling devices are connected in series or in parallel through the terminals to form a semiconductor cooling device matrix, thereby forming power devices of different areas.

5. A serialized blackbody control system as claimed in claim 1, characterized in that The control system interface unit is designed to be universal and standardized, and a function expansion interface is reserved.

6. A serialized blackbody control system as claimed in claim 1, characterized in that The human-computer interaction unit adopts configuration screen technology.

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