CN111148410A - TMS320C 6748-based intelligent heat dissipation system - Google Patents
TMS320C 6748-based intelligent heat dissipation system Download PDFInfo
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- CN111148410A CN111148410A CN202010023782.6A CN202010023782A CN111148410A CN 111148410 A CN111148410 A CN 111148410A CN 202010023782 A CN202010023782 A CN 202010023782A CN 111148410 A CN111148410 A CN 111148410A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20136—Forced ventilation, e.g. by fans
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20209—Thermal management, e.g. fan control
Abstract
The invention provides an intelligent heat dissipation system based on TMS320C6748, which comprises a plurality of temperature sensors, an infrared array sensor, a motor driver, a holder controller, a microprocessor and a digital signal processor, wherein the microprocessor receives and processes multipoint temperature data acquired by the temperature sensors and transmits the multipoint temperature data to the motor driver to drive a motor to operate so as to drive a fan to rotate; meanwhile, multipoint temperature data acquired by the temperature sensor also controls the rotation of the cradle head through the cradle head controller to perform fixed-point directional heat dissipation on the heating area; the digital signal processor receives and processes the overall temperature distribution information acquired by the infrared array sensor and feeds the information back to the user interface in real time based on MATLAB software, and the feedback information of the signal is also used for controlling the rotating speed of the motor.
Description
Technical Field
The invention relates to the field of information technology and automation control, in particular to an intelligent heat dissipation system based on TMS320C 6748.
Background
Since the 20 th century 60 years, digital signal processors (digital signal processing DSPs) have been applied to various fields in life along with the development of computer and communication technologies, in the aspect of temperature control, thermistors are mostly adopted at home and abroad to cooperate with digital signal processors to obtain temperature information, and for systems with higher temperature precision requirements, a scheme of high-precision temperature sensors to cooperate with DSPs is also adopted to obtain temperature information, but with the development of industrial technologies, the temperature acquisition of one or more temperature sensors distributed in a monitoring area cannot always ensure the full coverage of the temperature area, and cannot meet the requirements of modern life, such as the realization of fire prevention detection, temperature monitoring and other items, so that an infrared array sensor is derived, and the temperature monitoring of the whole area can be realized only by mounting one probe, the temperature that will acquire can be realized outputting in the form of the image to cooperate digital signal processor, and the temperature distribution condition of coordinating cooling system according to probe feedback can realize realizing fixed point directional heat dissipation to the control area again. The existing heat dissipation system can not realize the functions of accurately controlling a heat source in a monitoring area and directionally dissipating heat at a fixed point, and can not realize the functions of temperature acquisition and automatic control.
Disclosure of Invention
According to the technical problem provided by the invention, an intelligent heat dissipation system based on TMS320C6748 is provided. The multi-point temperature data collected by the multi-path temperature sensor is processed by the microprocessor to output signals to control the motor driver to drive the motor to operate so as to drive the fan to rotate, and meanwhile, the multi-point temperature data collected by the multi-path temperature sensor also controls the rotation of the cradle head through the cradle head controller to perform fixed-point directional heat dissipation on a heating area; the digital signal processor receives and processes the whole temperature distribution information acquired by the infrared array sensor and feeds the information back to the user interface in real time based on MATLAB software, the feedback information of the signal is also used for controlling the rotating speed of the motor, and the rotating speed of the fan can be changed in real time through the current temperature fed back.
The technical means adopted by the invention are as follows:
an intelligent cooling system based on TMS320C6748, comprising: the system comprises a plurality of temperature sensors, an infrared array sensor, a motor driver and a holder controller; the temperature sensor is used for acquiring multipoint temperature data; the infrared array sensor is used for acquiring the overall temperature distribution information of the temperature monitoring area; the motor driver is used for controlling the rotating speed of the fan in real time; the holder controller is used for controlling the holder to turn to perform fixed-point directional heat dissipation on the heating area;
the intelligent heat dissipation system also comprises a microprocessor and a digital signal processor, wherein the microprocessor is used for receiving and processing multipoint temperature data acquired by the temperature sensor and transmitting the multipoint temperature data to the motor driver to drive the motor to operate so as to drive the fan to rotate; meanwhile, multipoint temperature data acquired by the temperature sensor also controls the rotation of the cradle head through the cradle head controller to perform fixed-point directional heat dissipation on the heating area; the digital signal processor is used for receiving and processing the integral temperature distribution information acquired by the infrared array sensor and feeding back the information to the user interface in real time based on MATLAB software, and the feedback information of the signal is also used for controlling the rotating speed of the motor.
Furthermore, the cradle head is arranged at the position h higher than the temperature monitoring area, after the infrared probe acquires the temperature information, the microprocessor divides the output temperature matrix into 4 parts of upper, lower, left and right after low-pass filtering, averages the temperature information of each part after the division is finished, sorts the temperature averages of the four parts by a sorting method to obtain the area with the maximum value of the average value, and simultaneously outputs the position information (x, y) of the area with the maximum value, the information is sent to the holder controller through the serial port-to-Ethernet, the holder controller is provided with four input ports, each port can respectively control the holder steering angle to be 0 degrees, 90 degrees, 180 degrees and 270 degrees, the system matches the proper steering angle according to the position information and outputs the high level of the corresponding port, and the port circuit detects the level of the port in an interrupted scanning mode so as to realize the steering function of the holder; the steering angle of the tripod head is calculated by a formula, wherein sin theta is z/√ (z ^2+ h ^2), z √ (x1/x) ^2+ y ^2, wherein x1 is the distance from the boundary of the monitoring area to the position where the tripod head is arranged, h is the installation height of the tripod head, and x and y are the positions of the temperature areas.
Furthermore, the system also comprises a temperature display module which is used for decoding and correcting the collected regional temperature data, and converting the image into a temperature distribution image which changes in real time after the image is processed.
Further, the decoding and correction processing procedure specifically includes:
and (3) decoding: interchanging the positions of the high 4 bits and the low 4 bits of the collected area temperature data matrix, combining the high 4 bits and the low 4 bits into one data and changing the 16 system into the 10 system; 16-system data transmitted by a DSP (digital signal processor) read from a computer serial port based on MATLAB (matrix laboratory) software is automatically stored in a data buffer area, a frame image is subjected to removal of a synchronous frame header of front four bits and a redundant bit of rear four bits to obtain the temperature value of 768 points of a target object, and each two bytes are one temperature which is 100 times of the actual temperature; therefore, the temperature matrix is continuously read twice, the position of the matrix data input for the second time is sequentially delayed backward by one bit and then is added to be converted into a 10-system number, namely, (byte (n +1) × 256+ byte (n))/100, and a formula y (j, k) ═ d (1, i) + d (1, i +1) × 256)/100-10 is obtained;
and (3) correction: and calculating the inclination angle theta of the image by using a Radon algorithm, and multiplying the position information of each pixel point in the image by cos theta.
Further, the specific process of calculating the inclination angle θ of the image is as follows:
s1, calculating an edge binary image of the image by using an edge function, and detecting a straight line in the original image;
s2, calculating Radon transformation of the edge binary image, and projecting each point with the pixel of 1 in the direction of 0-179 degrees;
s3, detecting a peak value in the Radon transformation matrix, wherein the column coordinate theta of the peak value in the Radon transformation matrix of the straight line in the original image, which corresponds to the peak value, is the inclination angle of the straight line vertical to the straight line in the original image, so that the inclination angle of the straight line in the image is 90-theta.
Further, the system also comprises an image denoising processing process, wherein dead pixels and noise in the temperature matrix are filtered by adopting a median value before the temperature image is output.
Further, the system also comprises a plurality of fans, and each fan is provided with the temperature sensor.
Further, the service conditions of the multiple fans are determined according to the temperature conditions in the monitoring area, specifically, when the temperature sensors detect that the temperatures of multiple fans in the monitoring area exceed 75 degrees, the system sequentially increases the fans to be put into operation, removes the fans with directional heat dissipation, and performs heat dissipation treatment on the whole working area by the rest fans, if the temperature of the working area is controlled, the system detects the heat source of the working area, calls the fans to perform fixed-point directional heat dissipation on the place with high heat productivity in the working area, and sequentially reduces the fans until the rest fan works after the temperature is lower than 75 degrees.
Further, the system also comprises a liquid nitrogen cooling module, wherein a small amount of liquid nitrogen is sealed in the container through a pressure device, and when the system detects that the change gradient of the temperature value in the monitoring area is overlarge and the temperatures at a plurality of positions exceed a preset temperature value, the system can trigger the pressure device to spray the liquid nitrogen to the monitoring area, so that the quick cooling is realized.
Further, the model of the temperature sensor is TMP 1075; the model of the infrared array sensor is MLX 90640; the model of the holder controller is AT89S 52; the model of the microprocessor is TM4C123 GXL; the model of the digital signal processor is TMS320C 6748.
Compared with the prior art, the invention has the following advantages:
1. the invention is based on the MLX90640 infrared array sensor of Melexis company and cooperates with the TMS320C6748 digital signal processor, is used for dynamically monitoring the temperature distribution condition in the area, and simultaneously feeds back the temperature distribution to the user terminal in the form of images.
2. The intelligent heat dissipation system provided by the invention is added with a heat dissipation and liquid nitrogen cooling system in cooperation with temperature monitoring, can accurately control a heat source in a monitored area to perform fixed-point directional heat dissipation on the heat source, and simultaneously realizes the functions of temperature acquisition and automatic control.
For the reasons, the invention can be widely popularized in the fields of information technology, automation control and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is an overall block diagram of the system of the present invention;
FIG. 2 is a diagram of the temperature sensor and microprocessor of the present invention;
FIG. 3 is a diagram of the microprocessor and motor drive connection of the present invention;
FIG. 4 is a diagram of the digital signal processor in conjunction with the temperature probe and motor driver of the present invention;
FIG. 5 is a flow chart of fan control according to the present invention;
FIG. 6 is a diagram of the connection between the pan/tilt controller and the microprocessor according to the present invention;
FIG. 7 is a schematic view of the pitch angle of the head of the present invention;
FIG. 8 is a temperature distribution image of the present invention;
FIG. 9 is a GUI interface of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. 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.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
As shown in fig. 1, the present invention provides an intelligent heat dissipation system based on TMS320C6748, including: the system comprises a plurality of temperature sensors, an infrared array sensor, a motor driver and a holder controller; the multi-path temperature sensor is used for acquiring multi-point temperature data; the infrared array sensor is used for acquiring the overall temperature distribution information of the temperature monitoring area; the motor driver is used for controlling the rotating speed of the fan in real time; the holder controller is used for controlling the holder to turn to perform fixed-point directional heat dissipation on the heating area;
the intelligent heat dissipation system also comprises a microprocessor and a digital signal processor, wherein the microprocessor is used for receiving and processing the multipoint temperature data collected by the temperature sensor and transmitting the multipoint temperature data to the motor driver to drive the motor to operate so as to drive the fan to rotate; meanwhile, multipoint temperature data acquired by the temperature sensor also controls the rotation of the cradle head through the cradle head controller to perform fixed-point directional heat dissipation on the heating area; the digital signal processor is used for receiving and processing the integral temperature distribution information acquired by the infrared array sensor and feeding back the information to the user interface in real time based on MATLAB software, and the feedback information of the signal is also used for controlling the rotating speed of the motor. As a preferred embodiment of the present invention, the model of the temperature sensor selected in the present invention is TMP 1075; the model of the infrared array sensor is MLX 90640; the model of the pan-tilt controller is AT89S 52; the model of the microprocessor is TM4C123 GXL; the model of the digital signal processor is TMS320C 6748.
As shown in fig. 2, a connection diagram of the temperature sensor and the microprocessor is provided, the TM4C123GXL microprocessor and the temperature sensor are connected through an I/O bus, a PB2 interface of the TM4C123GXL microprocessor is connected to an SCL interface of the TMP1075 temperature sensor, a PB3 interface of the TM4C123GXL microprocessor is connected to an SDA interface of the TMP1075 temperature sensor, and +3.3V is used as V + of the TM4C123GXL microprocessor and the TMP1075 temperature sensor (if the TMP1075 temperature sensor is connected to a computer by USB, this interface is not used) GND is connected to the TMP1075 temperature sensor and GND of the TM4C123GXL microprocessor. 8 TMP1075 temperature sensors can be connected to one I/O bus at the same time, and these sensors will be distributed at different positions of the temperature monitoring area to monitor the temperature, and measure the temperature of 8 points without mutual interference. When temperature measurement starts, the TM4C123GXL microprocessor sends a temperature acquisition command to the TMP1075 temperature sensor to obtain a reply, then the ADC is used for reading a value output by the temperature sensor (the temperature sensor is also provided with a 12-bit AD conversion module), the TM4C123GXL microprocessor converts the actual temperature value and outputs the value to a serial port of a UART0 sending end through a PA1 port, the current temperature is displayed on a user operation interface after being received by a computer end, because a fan in the system does not need to obtain a particularly accurate temperature value and the operational capability of the TM4C123GXL microprocessor is improved, the system is only provided with one high-accuracy temperature sensor as the measurement of the temperature value, the rest channels adopt analog temperature sensors of jump signals, when the temperature is higher than or lower than a specific value, the TM4C123GXL microprocessor controls PWM duty ratio to realize motor speed change control through the obtained jump signals, and the TM4C123GXL microprocessor judges the jump values of the obtained different temperature signals, the PWM duty cycle value will increase by 10% for each temperature exceeding a set temperature value until the maximum duty cycle is reached, and the duty cycle is 25% in the initial situation to protect the normal heat dissipation of the system.
As shown in fig. 3, a connection diagram of the microprocessor and the motor driver is provided, wherein an M0PWM0 interface of the TM4C123GXL microprocessor is connected with a PWM pin of the motor driver DRV10974 and outputs a duty ratio signal to the motor driver, a PD0 pin of the TM4C123GXL microprocessor is connected with an FR pin of the motor driver DRV10974 and can write a start-stop command to the motor driver, and a PD1 pin of the TM4C123GXL microprocessor is connected with an RG pin of the motor driver DRV10974 and returns a current rotation number and other state values of the motor to a user by the motor driver.
As shown in fig. 4, a connection diagram of the digital signal processor, the temperature probe and the motor driver is provided, the temperature acquisition of the temperature control part is realized by matching the MLX90640 infrared array sensor with the TMS320C6748 digital signal processor, the TMS320C6748 digital signal processor transmits data to the DSP processor for processing through interfaces UART2_ TXD, UART2_ RXD and RX and TX serial ports of the MLX90640 infrared array sensor, and the TMS320C6748 digital signal processor obtains an a/D conversion clock synchronized and in phase with a line according to the clock generation circuit to ensure that image data are acquired in the TMS320C6748 digital signal processor in a whole line for processing. The temperature data is processed into a matrix form and is transmitted to a USB interface of a computer through a USART1 serial port at a high speed, and finally the computer completes the display of images. In the aspect of display, MATLAB software is adopted as output display, and the software display operation steps are as follows:
step 3, decoding all the obtained data, wherein the original un-decoded data consists of 16-bit data with 4 high bits and 4 low bits, and a formula y (j, k) is established as (d (1, i) + d (1, i +1) × 256)/100-10; decoding the 16-system data to obtain new 10-system data which is the temperature information (unit degree centigrade) of each point; the specific decoding operation process is as follows:
interchanging the positions of the high 4 bits and the low 4 bits of the collected area temperature data matrix, combining the high 4 bits and the low 4 bits into one data and changing the 16 system into the 10 system; 16-system data transmitted by a DSP (digital signal processor) read from a computer serial port based on MATLAB (matrix laboratory) software is automatically stored in a data buffer area, a frame image is subjected to removal of a synchronous frame header of front four bits and a redundant bit of rear four bits to obtain the temperature value of 768 points of a target object, and each two bytes are one temperature which is 100 times of the actual temperature; therefore, the temperature matrix is continuously read twice, the position of the matrix data input for the second time is sequentially delayed backward by one bit and then is added to be converted into a 10-system number, namely, (byte (n +1) × 256+ byte (n))/100, and a formula y (j, k) ═ d (1, i) + d (1, i +1) × 256)/100-10 is obtained;
step 4, correction: and calculating the inclination angle theta of the image by using a Radon algorithm, and multiplying the position information of each pixel point in the image by cos theta. The specific process of calculating the inclination angle θ of the image is as follows:
s1, calculating an edge binary image of the image by using an edge function, and detecting a straight line in the original image;
s2, calculating Radon transformation of the edge binary image, and projecting each point with the pixel of 1 in the direction of 0-179 degrees;
s3, detecting a peak value in the Radon transformation matrix, wherein the column coordinate theta of the peak value in the Radon transformation matrix of the straight line in the original image, which corresponds to the peak value, is the inclination angle of the straight line vertical to the straight line in the original image, so that the inclination angle of the straight line in the image is 90-theta.
And 5, converting the temperature information into a thermal imaging image through a colorbar function, outputting the maximum numerical value of the temperature matrix through a max function, feeding the maximum numerical value back to the TMS320C6748 microprocessor, and completing the image display function of the temperature matrix, wherein a display part displays the temperature distribution condition which can be changed in real time through a GUI (graphical user interface) interface as shown in figures 8 and 9.
The TMS320C6748 digital signal processor can make a judgment by feeding back the average temperature in the temperature monitoring area through the temperature probe to control the working condition of the motor responsible for the overall heat dissipation of the monitoring area, and the process of the TMS320C6748 digital signal processor for evaluating the average temperature is as follows:
carrying out median filtering denoising treatment on the whole temperature region output by the temperature probe, finding out the median of the maximum value and the minimum value after denoising is finished, comparing the median value with the temperature mode, if the error between the median value and the temperature mode is within 5 degrees, the median temperature is the current estimated temperature, if the error between the median value and the temperature mode is too large, the median value between the maximum value and the minimum value is taken after the error between the median value and the temperature mode is removed, until the temperature is within the error, the estimation of the temperature average value is finished (the purpose is to reduce the calculation amount of a DSP and improve the reaction speed of a system), the TMS320C6748 digital signal processor sets the PWM duty ratio according to the current, as shown in fig. 5, which is a connection diagram of the TMS320C6748 digital signal processor, the temperature probe and the motor driver, EPWMOA and EPWM1A interfaces of the TMS320C6748 digital signal processor are respectively connected with PWM interfaces of the motor drivers 1 and 2 to send PWM signals to the motor drivers to change the rotation speed of the motors in real time, thereby realizing the function of integral heat dissipation of the monitored area.
As shown in fig. 5, which is a control flow chart of the fan of the present invention, the system of the present invention further includes multiple fans, and each fan is installed with a temperature sensor. The using condition of the multiple fans is determined according to the temperature condition in the monitoring area, specifically, when the temperature sensor detects that the temperatures of multiple fans in the monitoring area exceed 75 degrees, the system sequentially increases the fans to be put into operation, the fans for directional heat dissipation are removed, the rest fans can perform heat dissipation treatment on the whole working area, if the temperature of the working area is controlled, the system detects the heat source of the working area, the fans are called to perform fixed-point directional heat dissipation on the place with high heat productivity in the working area, and after the temperature is lower than 75 degrees, the fans are sequentially reduced until the rest fan works.
As shown in fig. 6, a connection diagram of the pan/tilt controller and the microprocessor is provided, the pan/tilt controller adopts an AT89S52 microcontroller as a main control chip, and is connected with a TM4C123GXL chip through p1.0-p1.4 interfaces, the TM4C123GXL microprocessor sorts the obtained multiple temperature signals, encodes an area exceeding a maximum threshold value and then transmits the encoded area to the pan/tilt controller through a p1 port, the pan/tilt controller matches a corresponding steering angle after obtaining the area information of the maximum temperature value, and the steering angle of the pan/tilt steering engine is changed by changing the pulse width of an output signal. As shown in fig. 7, the pan-tilt is installed at the height h above the temperature monitoring area, after the infrared probe acquires the temperature information, the microprocessor divides the output temperature matrix into 4 parts of upper, lower, left and right after low-pass filtering, averages the temperature information of each part after the division is finished, sorts the temperature averages of the four parts by a sorting method to obtain the area with the maximum value of the average value, and simultaneously outputs the position information (x, y) of the area with the maximum value, the information is sent to the holder controller through the serial port-to-Ethernet, the holder controller is provided with four input ports, each port can respectively control the holder steering angle to be 0 degrees, 90 degrees, 180 degrees and 270 degrees, the system matches the proper steering angle according to the position information and outputs the high level of the corresponding port, and the port circuit detects the level of the port in an interrupted scanning mode so as to realize the steering function of the holder; the steering angle of the tripod head is calculated by a formula, wherein sin theta is z/√ (z ^2+ h ^2), z √ (x1/x) ^2+ y ^2, wherein x1 is the distance from the boundary of the monitoring area to the position where the tripod head is arranged, h is the installation height of the tripod head, and x and y are the positions of the temperature areas. Finally, the system can radiate the highest point of the temperature area in a fixed-point and directional manner.
Further, as a preferred embodiment of the present invention, the system of the present invention further includes a liquid nitrogen cooling module, a small amount of liquid nitrogen is sealed in the container through the pressure device, and when the system detects that the change gradient of the temperature value in the monitoring area is too large and the temperatures at a plurality of positions exceed a predetermined temperature value, the system triggers the pressure device to spray the liquid nitrogen to the monitoring area, so as to achieve quick cooling.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. An intelligence cooling system based on TMS320C6748, includes: the system comprises a plurality of temperature sensors, an infrared array sensor, a motor driver and a holder controller; the temperature sensor is used for acquiring multipoint temperature data; the infrared array sensor is used for acquiring the overall temperature distribution information of the temperature monitoring area; the motor driver is used for controlling the rotating speed of the fan in real time; the holder controller is used for controlling the holder to turn to perform fixed-point directional heat dissipation on the heating area;
the intelligent heat dissipation system also comprises a microprocessor and a digital signal processor, wherein the microprocessor is used for receiving and processing multipoint temperature data acquired by the temperature sensor and transmitting the multipoint temperature data to the motor driver to drive the motor to operate so as to drive the fan to rotate; meanwhile, multipoint temperature data acquired by the temperature sensor also controls the rotation of the cradle head through the cradle head controller to perform fixed-point directional heat dissipation on the heating area; the digital signal processor is used for receiving and processing the integral temperature distribution information acquired by the infrared array sensor and feeding back the information to the user interface in real time based on MATLAB software, and the feedback information of the signal is also used for controlling the rotating speed of the motor.
2. The intelligent heat dissipation system of claim 1, wherein the pan-tilt is mounted at a height h above a temperature monitoring area, after the infrared probe acquires the temperature information, the microprocessor divides the output temperature matrix into 4 parts of upper, lower, left and right parts through low-pass filtering, the average value of the temperature information of each part is obtained after the division is finished, the four parts of temperature average values are sorted by a sorting method to obtain the area with the maximum value of the average value, and the position information (x, y) of the area with the maximum value is output at the same time, the information is sent to the holder controller through the serial port-to-Ethernet, the holder controller is provided with four input ports, each port can respectively control the holder steering angle to be 0 degrees, 90 degrees, 180 degrees and 270 degrees, the system matches the proper steering angle according to the position information and outputs the high level of the corresponding port, and the port circuit detects the level of the port in an interrupted scanning mode so as to realize the steering function of the holder; the steering angle of the tripod head is calculated by a formula, wherein sin theta is z/√ (z ^2+ h ^2), z √ (x1/x) ^2+ y ^2, wherein x1 is the distance from the boundary of the monitoring area to the position where the tripod head is arranged, h is the installation height of the tripod head, and x and y are the positions of the temperature areas.
3. The intelligent heat dissipation system of claim 1, further comprising a temperature display module for decoding and correcting the collected region temperature data, and converting the image into a real-time temperature distribution image after the image processing.
4. The intelligent cooling system according to claim 3, wherein the decoding and correction processing specifically comprises:
and (3) decoding: interchanging the positions of the high 4 bits and the low 4 bits of the collected area temperature data matrix, combining the high 4 bits and the low 4 bits into one data and changing the 16 system into the 10 system; 16-system data transmitted by a DSP (digital signal processor) read from a computer serial port based on MATLAB (matrix laboratory) software is automatically stored in a data buffer area, a frame image is subjected to removal of a synchronous frame header of front four bits and a redundant bit of rear four bits to obtain the temperature value of 768 points of a target object, and each two bytes are one temperature which is 100 times of the actual temperature; therefore, the temperature matrix is continuously read twice, the position of the matrix data input for the second time is sequentially delayed backward by one bit and then is added to be converted into a 10-system number, namely, (byte (n +1) × 256+ byte (n))/100, and a formula y (j, k) ═ d (1, i) + d (1, i +1) × 256)/100-10 is obtained;
and (3) correction: and calculating the inclination angle theta of the image by using a Radon algorithm, and multiplying the position information of each pixel point in the image by cos theta.
5. The intelligent heat dissipation system of claim 4, wherein the specific process of calculating the inclination angle θ of the image is as follows:
s1, calculating an edge binary image of the image by using an edge function, and detecting a straight line in the original image;
s2, calculating Radon transformation of the edge binary image, and projecting each point with the pixel of 1 in the direction of 0-179 degrees;
s3, detecting a peak value in the Radon transformation matrix, wherein the column coordinate theta of the peak value in the Radon transformation matrix of the straight line in the original image, which corresponds to the peak value, is the inclination angle of the straight line vertical to the straight line in the original image, so that the inclination angle of the straight line in the image is 90-theta.
6. The intelligent heat dissipation system of claim 4, further comprising an image denoising process, wherein the median is used to filter out the dead pixels and noise in the temperature matrix before outputting the temperature image.
7. The intelligent heat dissipation system of claim 1, further comprising multiple fans, each fan mounting the temperature sensor.
8. The intelligent heat dissipation system of claim 7, wherein the usage of the multiple fans is determined according to the temperature of the monitored area, specifically, when the temperature sensor detects that the temperatures of the multiple fans in the monitored area exceed 75 °, the system sequentially increases the fans to be put into operation, removes the fans for directional heat dissipation, and performs heat dissipation on the entire working area by using the remaining fans, and if the temperature of the working area is controlled, the system detects the heat source of the working area, invokes the fans to perform fixed-point directional heat dissipation on the place with high heat generation in the working area, and after the temperature is lower than 75 °, sequentially decreases the fans until the remaining fan operates.
9. The intelligent heat dissipation system of claim 1, further comprising a liquid nitrogen cooling module, wherein a small amount of liquid nitrogen is sealed in the container through the pressure device, and when the system detects that the change gradient of the temperature value in the monitoring area is too large and the temperatures at a plurality of positions exceed a predetermined temperature value, the system triggers the pressure device to spray the liquid nitrogen to the monitoring area, so as to achieve quick cooling.
10. The intelligent heat dissipation system of claim 1, wherein the temperature sensor is of the model TMP 1075; the model of the infrared array sensor is MLX 90640; the model of the holder controller is AT89S 52; the model of the microprocessor is TM4C123 GXL; the model of the digital signal processor is TMS320C 6748.
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