All-domain real-time multi-azimuth electric control cabinet monitoring and partition regulation and control system

Abstract

A global real-time multi-azimuth electric control cabinet monitoring and partition regulation and control system comprises an electric control cabinet, an infrared phased array type temperature monitoring device, a plurality of cooling fans, a signal processing module and a controller. The interior of the electric control cabinet is divided into a plurality of areas, and the cooling fans are installed on different side walls of the electric control cabinet and correspond to the areas one to one. The infrared phased array type temperature monitoring device is mounted in the electric control cabinet to detect temperature infrared radiation signals of a plurality of areas in real time; the signal processing module is connected with the infrared phased array type temperature monitoring device so as to filter and amplify temperature infrared radiation signals of a plurality of areas and then send the temperature infrared radiation signals to the controller; the controller is connected with the multiple cooling fans so as to calculate and process information from the signal processing module to obtain temperature information of each area and control the corresponding cooling fans to work, intelligent regulation and control over the temperatures of the different areas can be achieved, the cooling efficiency is improved, meanwhile, energy consumption is reduced, and the overheating risk of equipment is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the field of electric control cabinet monitoring, and in particular to a global real-time and multi-directional electric control cabinet monitoring and zoning control system. Background Art

[0002] An electric control cabinet is a closed device used to centrally control and manage electrical equipment. It is usually made of metal materials and contains various electrical components such as circuit breakers, relays, contactors, PLCs, inverters, terminal blocks, etc. Electric control cabinets are commonly used in industrial automation, building electrical and power distribution systems, etc. Electric control cabinets play important functions in electrical systems, such as distributing power, achieving automatic control, protecting electrical equipment, and monitoring equipment status.

[0003] However, in a high-power, high-density working environment, the heat generated by the components in the electric control cabinet increases. Traditional temperature monitoring methods usually use single-point measurement, which is not comprehensive and difficult to respond in real time, which can easily cause the equipment to overheat, thereby affecting its performance and life. In addition, when dealing with local overheating areas, existing heat dissipation systems are usually difficult to accurately implement targeted cooling measures. Therefore, it is urgent to develop a device that can fully monitor the temperature inside the electric control cabinet and realize precise zone temperature control, so as to achieve accurate monitoring and adaptive control of the internal temperature of the electric control cabinet. Summary of the invention

[0004] The main purpose of the present invention is to overcome the above-mentioned defects in the prior art and propose a global real-time and multi-directional electric control cabinet monitoring and zoning control system, which can obtain the temperature of different directions in the electric control cabinet in real time and in all directions, and then the controller sends different signals to fans in different areas to achieve precise control of zone temperature.

[0005] The present invention adopts the following technical solution:

[0006] A global, real-time, multi-directional electric control cabinet monitoring and zoning control system comprises an electric control cabinet, an infrared phased array temperature monitoring device, a plurality of cooling fans, a signal processing module and a controller; the interior of the electric control cabinet is divided into a plurality of zones, and a plurality of cooling fans are installed on different side walls of the electric control cabinet and correspond to the plurality of zones one by one; the infrared phased array temperature monitoring device is installed in the electric control cabinet to detect temperature infrared radiation signals of the plurality of zones in real time; the signal processing module is connected to the infrared phased array temperature monitoring device to filter and amplify the temperature infrared radiation signals of the plurality of zones and then send them to the controller, and the controller is connected to the plurality of cooling fans to calculate and process the information from the signal processing module to obtain the temperature information of each zone and control the corresponding cooling fans to work so as to realize intelligent control of the temperatures of different zones.

[0007] The infrared phased array temperature monitoring device includes a bracket and a plurality of infrared sensor groups. The bracket is installed in the middle of the top of the electric control cabinet and is provided with a plurality of mounting rings to install the plurality of infrared sensor groups one by one. Each of the mounting rings is provided with a plurality of circumferentially distributed mounting grooves. The infrared sensor group is provided with a plurality of infrared sensors which are respectively installed in the corresponding mounting grooves and face different areas.

[0008] The several areas in the electric control cabinet are distributed along the vertical direction and the horizontal direction; the several installation circles are coaxially arranged and the diameters are gradually increased or decreased, and the several installation circles are also arranged in sequence in the vertical direction of the electric control cabinet.

[0009] The distance between the innermost circle of the plurality of installation circles and the top of the electric control cabinet is smaller than the distance between the other installation circles and the top of the electric control cabinet.

[0010] The number of infrared sensors on the mounting rings gradually increases from the inside to the outside along the radial direction; the infrared sensors have a measurement frequency range of 300 GHz to 430 THz and a measurement infrared wavelength range of 3 um to 100 um.

[0011] The electric control cabinet is divided into six areas in three rows and two columns, and two opposite side walls of the electric control cabinet are respectively provided with three cooling fans spaced apart in the vertical direction to correspond one to one with the six areas.

[0012] The controller samples and performs digital-to-analog conversion on the time domain signal from the signal processing module, and then performs fast Fourier transform on the converted digital signal to convert it into a frequency domain signal; then, in the frequency domain, each component of the spectrum is analyzed to identify signals of different wavelengths, and then the phase difference of the signals of different wavelengths is calculated, and the azimuth of the region relative to the infrared phased array temperature monitoring device is calculated based on the phase difference:

[0013]

[0014] in, is the phase difference between the infrared sensor corresponding to the area and the adjacent infrared sensor, λ is the wavelength of infrared light radiated by the area, d is the distance between the infrared sensor corresponding to the area and the adjacent infrared sensor, and θ is the azimuth angle of the area relative to the infrared phased array temperature monitoring device.

[0015] The infrared phased array temperature monitoring device calculates the temperature T of each area according to the following Wien displacement formula:

[0016] λ max T = b;

[0017] Among them, λmax is the wavelength of infrared light radiated by the region, T is the device surface temperature of the region, and b is the Wien constant.

[0018] It also includes a zoned intelligent cooling control module, which is connected between the controller and the cooling fan. The zoned intelligent cooling control module analyzes the control signal from the controller and intelligently adjusts the angle and wind speed of the cooling fan in the corresponding area in real time.

[0019] It can be seen from the above description of the present invention that, compared with the prior art, the present invention has the following beneficial effects:

[0020] The system of the present invention can realize all-round real-time temperature monitoring through the temperature monitoring device of infrared phased array technology, accurately capture the infrared radiation of each component in the electric control cabinet, ensure a comprehensive understanding of the temperature distribution, no longer rely on traditional single-point measurement, thereby improving the accuracy and reliability of monitoring.

[0021] The system of the present invention divides the entire electric control cabinet into multiple areas, and equips each area with a cooling fan. The system can intelligently adjust the speed and direction of the fan according to the temperature information monitored in real time to achieve targeted heat dissipation control. This partition management not only greatly improves the heat dissipation efficiency, but also effectively reduces energy consumption, prevents the risk of overheating of the equipment, and ensures the safety and stable operation of the electric control cabinet.

[0022] The signal of the present invention, the modular signal processing mechanism ensures the filtering and noise reduction of the data, enables the controller to respond instantly, realizes efficient temperature control, and further enhances the overall performance and energy efficiency of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the system of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of the infrared phased array multi-zone temperature measurement device of the system of the present invention;

[0025] Figure 3 It is a schematic diagram of the principle of precise temperature measurement and control of different zones of the system of the present invention.

[0026] in:

[0027] 1. Infrared phased array temperature monitoring device; 2. Inner door panel; 3. Outer door panel; 4. Bottom plate; 5. Cabinet; 6. Cooling fan; 7. Top cover; 8. Micro-break switch mounting plate; 9. Infrared sensor group; 10. Infrared sensor; 11. Bracket; 12. Mounting ring; 13. Mounting slot, 14. Controller; 15. Signal processing unit; 16. Partitioned intelligent cooling control module.

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. DETAILED DESCRIPTION

[0029] The present invention is further described below through specific implementation modes.

[0030] See also Figures 1 to 3 , a global real-time multi-directional electric control cabinet monitoring and zoning control system, including an electric control cabinet, an infrared phased array temperature monitoring device 1, a plurality of cooling fans 6, a signal processing module and a controller 14. The interior of the electric control cabinet is divided into a plurality of areas, and a plurality of cooling fans 6 are installed on different side walls of the electric control cabinet and correspond to the plurality of areas one by one. The infrared phased array temperature monitoring device 1 is installed in the electric control cabinet to detect the temperature infrared radiation signals of the plurality of areas in real time. The signal processing module is connected to the infrared phased array temperature monitoring device 1 to filter and amplify the temperature infrared radiation signals of the plurality of areas and then send them to the controller 14. The controller 14 is connected to the plurality of cooling fans 6 to calculate and process the information from the signal processing module to obtain the temperature information of each area and control the corresponding cooling fans 6 to work so as to realize the intelligent control of the temperature of different areas.

[0031] Among them, the electric control cabinet is a conventional electric control cabinet structure, which includes a door panel and a cabinet body 5. The cabinet body 5 has a storage space and is provided with a bottom plate 4, a top cover 7 and a micro-break switch mounting plate 8, etc., to place various electrical components, such as circuit breakers, relays, contactors, PLCs, frequency converters and terminal blocks. The door panel is hinged to the cabinet body 5 to open or close the storage space, and the door panel can be provided with an inner door panel 2 and an outer door panel 3. The interior of the electric control cabinet is divided into several areas by virtual division, and is not separated by a physical structure. Several areas in the electric control cabinet are distributed in the vertical direction and the horizontal direction, that is, several areas are arranged in the vertical direction and the horizontal direction to form several rows and several columns. The number of areas is adjusted according to the size and shape of the electric control cabinet. For example, in the figure, the electric control cabinet is divided into six areas of three rows and two columns, and the two opposite side walls of the electric control cabinet are respectively provided with three cooling fans 6 distributed in the vertical direction to correspond to the six areas one by one.

[0032] The infrared phased array temperature monitoring device 1 includes a bracket 11 and a plurality of infrared sensor groups 9. The bracket 11 is installed in the middle of the top of the electric control cabinet and is provided with a plurality of mounting rings 12. The mounting rings 12 are ring-shaped and can be circular rings or square rings, etc. The entire bracket 11 is similar to a honeycomb. The bracket 11 is made of aluminum alloy as a whole, which is light in weight and easy to manufacture.

[0033] The number of the mounting circles 12 corresponds to the number of the infrared sensor groups 9, so that the infrared sensor groups 9 are mounted one by one, that is, the infrared sensor group multilayer array structure is arranged on the honeycomb bracket 11. Each mounting circle 12 is provided with a plurality of mounting grooves 13 distributed circumferentially, and the infrared sensor group 9 is provided with a plurality of infrared sensors 9 which are respectively mounted in the corresponding mounting grooves 13 and face different areas in the electric control cabinet, and each infrared sensor 9 is independent of each other and closely arranged.

[0034] Several mounting circles 12 are coaxially arranged and their diameters gradually increase or decrease, that is, the diameters of several mounting circles 12 gradually increase from the inside to the outside in the radial direction, and gradually decrease from the outside to the inside in the radial direction. Several mounting circles 12 are also arranged in sequence in the vertical direction of the electric control cabinet, that is, at different heights. After the corresponding infrared sensor 9 is installed on the mounting groove 13 of each mounting circle 12, the entire infrared phased array temperature monitoring device is similar to a three-dimensional hemisphere. In the figure, taking three mounting circles 12 and three infrared sensor groups 9 as an example, they are divided into three coaxial mounting circles 12 of an outer circle, a middle circle and an inner circle, and the number of corresponding infrared sensors 9 in each group decreases layer by layer inwardly. The outer circle and the middle circle are inclined at an angle of 60° relative to the horizontal plane, and the inner circle is inclined at an angle of 32° relative to the horizontal plane.

[0035] Furthermore, in this embodiment, the distance between the innermost circle of the plurality of installation circles 12 and the top of the electric control cabinet can be smaller than the distance between the other installation circles 12 and the top of the electric control cabinet. This arrangement can enhance the overall coverage effect of the infrared phased array temperature monitoring device 1.

[0036] The number of infrared sensors on the plurality of mounting rings 12 gradually increases radially from the inside to the outside. The infrared sensor 9 measures a frequency range of 300 GHz to 430 THz and an infrared wavelength range of 3 um to 100 um. Specifically, the infrared sensor 9 can use an infrared temperature sensor of model MLX90614, and each infrared temperature sensor is equipped with a housing for protection. In the figure, a total of 40 MLX90614 infrared temperature sensors used in the plurality of infrared sensor groups 9 are arranged in an array in multiple layers on a honeycomb-shaped bracket 11, and the signal output lines of each infrared temperature sensor are connected to the subsequent signal processing unit 15 through the small holes reserved on the bracket 11.

[0037] The signal processing unit 15 has functions such as signal filtering and signal noise reduction, and can perform low-pass filtering and amplification on the temperature infrared radiation signal before sending it to the controller 14. The signal processing unit 15 uses a circuit board with a low-pass filtering circuit and an amplifying circuit. The low-pass filter is a Butterworth low-pass filter, and the operational amplifier model that can be used in the amplifying circuit is LM741.

[0038] The controller 14 of the present invention determines the temperature information of different areas according to the difference in time required for the temperature infrared radiation signals of different areas to reach the infrared phased array temperature monitoring device 1. Then, the speed and direction of the radiator of each area are adjusted according to the different temperature conditions of the partitions, so as to realize intelligent control of the temperature of different partitions, enhance the heat dissipation efficiency and reduce energy consumption at the same time, and effectively reduce the risk of equipment overheating.

[0039] When the temperature of one or more areas in the electric control cabinet rises to a value exceeding the threshold, the infrared radiation from the area is accurately captured by the infrared temperature sensor on the array. The higher the temperature, the greater the intensity of the infrared radiation and the shorter the wavelength. The temperature T can be calculated according to the following Wien displacement formula:

[0040] λ max T=b

[0041] Among them, λ max is the wavelength of infrared radiation radiated by the region, T is the device surface temperature of the region, and b is the Wien constant, b = 0.002897 m·K.

[0042] Specifically, the controller 14 can obtain the phase difference of the temperature of different regions according to the time difference of the temperature infrared rays of different regions reaching the infrared phased array temperature monitoring device 1, and further calculate the azimuth according to the phase difference. The azimuth of the region relative to the infrared phased array temperature monitoring device 1 is calculated by the following formula.

[0043]

[0044] in, is the phase difference between the infrared sensor corresponding to the area and the adjacent infrared sensor, λ is the wavelength of infrared radiation radiated by the area, d is the distance between the infrared sensor corresponding to the area and the adjacent infrared sensor, and θ is the azimuth angle of the area relative to the infrared phased array temperature monitoring device 1.

[0045] The controller 14 of the present invention can adopt a PLC series controller, wherein the CPU is a Siemens S7-1200 series PLC, which has the advantages of powerful computing function and fast computing speed. The system of the present invention can also include a display with a resolution of 1920×1080, a host equipped with an Intel Core i7 processor, equipped with 16GB RAM and 256GB SSD storage space, running the Windows 10 IoT Enterprise operating system, and equipped with a keyboard and mouse.

[0046] The system of the present invention is also provided with a partitioned intelligent cooling control module 16 connected between the controller 14 and multiple cooling fans 6, and is used to control the cooling fans 6 according to the signal output by the controller 14. The partitioned intelligent cooling control module 16 uses the STM32F103XC8T6 core development board to build the hardware circuit, and debugs the code in the MDK-ARM development environment to achieve precise adjustment of the fan angle and wind speed, thereby achieving precise control of the partition temperature.

[0047] The working principle of the present invention is as follows:

[0048] During the actual operation of the system, the infrared phased array temperature monitoring device 1 in the electric control cabinet obtains infrared rays radiated from different areas, converts the infrared rays from optical signals into analog signals and transmits them to the signal processing unit 15. The signal processing unit 15 transmits the signals to the controller 14 after smoothing filtering and amplification. The controller 14 can easily calculate the wavelength, phase, etc. of the signals of forty independent infrared temperature sensors through the algorithm edited for the phased array. Since the infrared phased array temperature monitoring device 1 is divided into multiple circles (such as inner circle, middle circle, and outer circle), in order to effectively utilize the analog signals transmitted by all infrared sensors 9 in multiple circles, a special pairing method and multi-channel signal fusion and weighted processing algorithm are adopted to accurately determine the orientation of multiple potential high-temperature areas.

[0049] First, each infrared sensor 9 receives aliased signals from different areas, which may cause interference due to signal overlap. To solve this problem, the algorithm of the controller 14 first samples the time domain signal of each sensor, performs digital-to-analog conversion, and then performs fast Fourier transform (FFT) on the obtained digital signal to convert it into a frequency domain signal.

[0050]

[0051] in, is the rotation factor. FFT uses the periodicity and symmetry of the rotation factor to merge, classify and sort, reduce the number of operations, and transform the digital signal X in the time domain (n) Divide n into odd columns and even columns, and use the above formula to decompose the sequence of n points into 2 Through such butterfly calculation, the time domain analog signal output by the sensor can be quickly converted into a frequency domain signal to identify signals of different wavelengths. This can effectively reduce the number of operations and reduce the delay of signal processing.

[0052] In the frequency domain, the various components of the spectrum are analyzed to identify signals of different wavelengths. In this step, the algorithm will focus on demodulating the signals of the same wavelength output by adjacent sensors and calculating the phase difference in the next step. For the infrared sensor in the inner circle, the algorithm calculates the average phase difference of the two adjacent infrared sensors in the middle circle; at the same time, for the infrared sensor in the middle circle, the algorithm also calculates the average phase difference of the two adjacent infrared sensors in the outer circle. In addition, in signal processing, the controller 14 also writes weighted processing and multi-channel signal fusion algorithms. Through the weighted processing algorithm, infrared sensors with high output signal quality are selected, and the wavelength and phase difference are calculated according to their output signals. The azimuth corresponding to the wavelength is preliminarily determined, and the signals of each circle are summarized according to the executed aggregation algorithm, and the accurate phase difference corresponding to each wavelength signal is finally determined, and the azimuth of the wavelength signal is finally calculated through these phase differences, thereby accurately locating the signal source. According to the Wien displacement formula, the temperature signal corresponding to the wavelength can be calculated, and according to the azimuth calculation formula, the azimuth corresponding to the phase difference can be calculated, thereby determining the real-time temperature of multiple areas.

[0053] Based on the comparison between the real-time temperature and the threshold set for each zone, the controller 14 will output corresponding fan control signals for multiple zones and transmit them to the zoned intelligent cooling control module 16. The zoned intelligent cooling control module 16 will parse the received control signals and intelligently adjust the fan angle and wind speed in real time. The temperature signals and fan speed signals of multiple zones calculated by the controller 14 will be displayed on the screen in real time through the display device. The operator can implement control operations such as switching the electrical control cabinet on and off and adjusting the fan.

[0054] The system of the present invention only requires one measuring device to realize all-round real-time temperature monitoring in the electric control cabinet, and realizes precise regulation according to different zone temperatures, which significantly improves the heat dissipation effect and reduces energy consumption, effectively reduces the risk of equipment overheating, and extends the service life of the electric control cabinet, and has strong application value.

[0055] In the present invention, the terms "first", "second", "third", etc. are only used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. In the description, the directions or positional relationships indicated by "upper", "lower", "left", "right", "front", and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and are not intended to indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present invention. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0056] In addition, in the description of this application, unless otherwise specified, "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0057] The above is only a specific implementation of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A global real-time multi-directional electric control cabinet monitoring and zoning control system, including an electric control cabinet, characterized in that: It also includes an infrared phased array temperature monitoring device, a plurality of cooling fans, a signal processing module and a controller; the interior of the electric control cabinet is divided into a plurality of areas, and a plurality of cooling fans are installed on different side walls of the electric control cabinet and correspond to the plurality of areas one by one; the infrared phased array temperature monitoring device is installed in the electric control cabinet to detect the temperature infrared radiation signals of the plurality of areas in real time; the signal processing module is connected to the infrared phased array temperature monitoring device to filter and amplify the temperature infrared radiation signals of the plurality of areas and then send them to the controller, and the controller is connected to the plurality of cooling fans to calculate and process the information from the signal processing module to obtain the temperature information of each area and control the corresponding cooling fans to work so as to realize intelligent regulation of the temperature of different areas.

2. The global real-time multi-directional electric control cabinet monitoring and zoning control system according to claim 1, characterized in that: The infrared phased array temperature monitoring device includes a bracket and a plurality of infrared sensor groups. The bracket is installed in the middle of the top of the electric control cabinet and is provided with a plurality of mounting rings to install the plurality of infrared sensor groups one by one. Each of the mounting rings is provided with a plurality of circumferentially distributed mounting grooves. The infrared sensor group is provided with a plurality of infrared sensors which are respectively installed in the corresponding mounting grooves and face different areas.

3. The global real-time multi-directional electric control cabinet monitoring and zoning control system as claimed in claim 2, characterized in that: The several areas in the electric control cabinet are distributed along the vertical direction and the horizontal direction; the several installation circles are coaxially arranged and the diameters are gradually increased or decreased, and the several installation circles are also arranged in sequence in the vertical direction of the electric control cabinet.

4. The global real-time multi-directional electric control cabinet monitoring and zoning control system according to claim 2 is characterized by: The distance between the innermost circle of the plurality of installation circles and the top of the electric control cabinet is smaller than the distance between the other installation circles and the top of the electric control cabinet.

5. The global real-time multi-directional electric control cabinet monitoring and zoning control system as claimed in claim 2, characterized in that: The number of infrared sensors on the mounting rings gradually increases from the inside to the outside along the radial direction; the infrared sensors have a measurement frequency range of 300 GHz to 430 THz and a measurement infrared wavelength range of 3 um to 100 um.

6. The global real-time multi-directional electric control cabinet monitoring and zoning control system according to claim 1 is characterized by: The electric control cabinet is divided into six areas in three rows and two columns, and two opposite side walls of the electric control cabinet are respectively provided with three cooling fans spaced apart in the vertical direction to correspond one to one with the six areas.

7. The global real-time multi-directional electric control cabinet monitoring and zoning control system as claimed in claim 2 is characterized by: The controller samples and performs digital-to-analog conversion on the time domain signal from the signal processing module, and then performs fast Fourier transform on the converted digital signal to convert it into a frequency domain signal; then, in the frequency domain, each component of the spectrum is analyzed to identify signals of different wavelengths, and then the phase difference of the signals of different wavelengths is calculated, and the azimuth of the region relative to the infrared phased array temperature monitoring device is calculated based on the phase difference: in, is the phase difference between the infrared sensor corresponding to the area and the adjacent infrared sensor, λ is the wavelength of infrared light radiated by the area, d is the distance between the infrared sensor corresponding to the area and the adjacent infrared sensor, and θ is the azimuth angle of the area relative to the infrared phased array temperature monitoring device.

8. The global real-time multi-directional electric control cabinet monitoring and zoning control system according to claim 1 is characterized by: The infrared phased array temperature monitoring device calculates the temperature T of each area according to the following Wien displacement formula: l max T=b; Among them, λ max is the wavelength of infrared light radiated by the region, T is the device surface temperature of the region, and b is the Wien constant.

9. The global real-time multi-directional electric control cabinet monitoring and zoning control system according to claim 1 is characterized by: It also includes a zoned intelligent cooling control module, which is connected between the controller and the cooling fan. The zoned intelligent cooling control module analyzes the control signal from the controller and intelligently adjusts the angle and wind speed of the cooling fan in the corresponding area in real time.

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