CN115853817B - Video judging system for variable-frequency energy-saving safety protection of fan - Google Patents
Video judging system for variable-frequency energy-saving safety protection of fan Download PDFInfo
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- CN115853817B CN115853817B CN202310167448.1A CN202310167448A CN115853817B CN 115853817 B CN115853817 B CN 115853817B CN 202310167448 A CN202310167448 A CN 202310167448A CN 115853817 B CN115853817 B CN 115853817B
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention relates to a video judgment system for frequency conversion energy-saving safety protection of a fan, which comprises the following components: the air quantity detection mechanism is used for detecting the current air quantity of the fan; the curve analysis mechanism is used for acquiring an in-situ air volume curve graph based on each current air volume detected by the air volume detection mechanism in a time-sharing way, acquiring a pre-stored ideal air volume curve graph from the frequency conversion energy-saving mechanism of the fan, and judging the fitting effect of the two curve graphs to determine the corresponding air volume adjustment performance level; and the coverage analysis device is used for determining the oil body distribution area based on the reference depth of field value of each oil body pixel point, the total number of each oil body pixel point and the imaging focal length. The video judgment system for the frequency conversion energy-saving safety protection of the fan is energy-saving, environment-friendly and stable in operation. The energy-saving performance of frequency conversion and the pertinence detection of excessive engine oil exudation of the bearing can be carried out on the energy-saving fan of frequency conversion, so that the intelligent level of fan control is improved, and the energy-saving level of frequency conversion of the fan is maintained.
Description
Technical Field
The invention relates to the field of energy conservation of fans, in particular to a video judgment system for frequency conversion energy-saving safety protection of fans.
Background
Most fans have the phenomenon of a large maraca trolley in the use process, and the flow, pressure, temperature and the like of the gas are required to be regulated frequently due to the changes in production, process and the like; many units still use a lag mode of adjusting the opening of the air baffles or valves to adjust the flow, pressure, temperature, etc. of the gas. This is actually achieved by artificially increasing the resistance and meeting the process and operating conditions requirements for gas flow regulation at the expense of wasted electrical energy and money. The lagging adjusting mode not only wastes precious energy, but also has poor adjusting precision, is difficult to meet the requirements of modern industrial production, service and the like, and has serious negative effects.
The fan frequency conversion equipment is special frequency conversion equipment customized for various fans. The variable-frequency speed regulation control device is adopted, and the rotating speed of the fan is changed, so that the air quantity of the fan is changed to adapt to the requirements of a production process, the running energy consumption is the most saved, and the comprehensive benefit is the highest. Therefore, the variable frequency speed regulation is an efficient speed regulation scheme, can realize stepless speed regulation of the fan, can conveniently form a closed-loop control system and realize constant pressure or constant flow control.
For example, the invention of application publication number CN115370602A discloses a blower variable frequency system of a rotor cooling air cooler of a gas turbine, which comprises a variable frequency cabinet body, wherein a frequency converter, a power frequency contactor, a frequency conversion isolation contactor and a control circuit are arranged in the variable frequency cabinet body, a blower motor is respectively connected with the frequency converter and the power frequency contactor to form a frequency conversion loop and a power frequency loop, the control circuit comprises a frequency conversion loop and a power frequency operation control loop, the frequency conversion operation loop and the power frequency operation control loop are switched through a power frequency/frequency conversion control switch, two in-situ control branches and a remote control branch which are connected in parallel are arranged in the frequency conversion operation control loop and the power frequency operation control loop, the remote TCS system obtains the temperature of cooling air in the rotor cooling air cooler, and frequency adjustment is carried out on the frequency converter after the temperature adjustment is carried out through a PID regulator. The invention can realize the power frequency and variable frequency operation of the blower motor, can perform remote and local operation, and can realize the automatic adjustment of the frequency converter through the PID regulator of the remote TCS system, thereby controlling the cooling of the rotor at a proper temperature.
Related technical schemes are also proposed by the university of south and middle school, and are respectively disclosed in 2 patent documents. The invention publication with the application publication number of CN115203861A is a method, a device and equipment for optimizing fan frequency conversion of a multi-stage machine station ventilation system, and the method comprises the following steps: acquiring a ventilation network model of a multi-stage machine station ventilation system; carrying out air distribution calculation on the ventilation network model based on the ventilation network calculation method, and adjusting the ventilation network model based on the air distribution calculation result until the simulation working condition of the fan in the ventilation network model is matched with the actual working condition; generating at least one fan variable frequency regulation scheme to be selected based on the underground ventilation air volume demand and a set optimization model corresponding to the multi-stage machine station ventilation system; determining an optimal fan variable frequency regulation scheme based on at least one fan variable frequency regulation scheme to be selected and underground ventilation air volume requirements; wherein, the optimization model is set as a multi-objective mixed integer linear programming model. Therefore, intelligent variable frequency regulation and control of the multi-stage machine station ventilation system can be realized, and in addition, the solving performance of a fan variable frequency regulation and control scheme can be greatly improved. The invention publication with the application publication number of CN115186510A is a method, a device and equipment for regulating and controlling the frequency conversion of a fan of a multi-stage machine station ventilation system, and the method comprises the following steps: acquiring a ventilation network model of a multi-stage machine station ventilation system; carrying out air distribution calculation on the ventilation network model based on the ventilation network calculation method, and adjusting the ventilation network model based on the air distribution calculation result until the simulation working condition of the fan in the ventilation network model is matched with the actual working condition; generating at least one fan variable frequency regulation scheme to be selected based on the underground ventilation air volume demand and a set optimization model corresponding to the multi-stage machine station ventilation system; and determining an optimal fan frequency conversion regulation scheme based on at least one fan frequency conversion regulation scheme to be selected and the underground ventilation air volume requirement. Therefore, the intelligent variable frequency regulation and control of the multi-stage machine station ventilation system can be realized, and the unattended control requirement is met.
However, the lack of a targeted analysis mechanism for the frequency conversion effect of the fan frequency conversion device in the prior art leads to that a manager does not determine whether the fan frequency conversion device needs to be adjusted in the use process so as to improve the frequency conversion energy-saving effect; meanwhile, for fans working in outdoor environments such as the open air and the like which are not managed by people, under the condition that engine oil of a bearing of the fans seeps excessively, adverse effects are caused on the working performance of the fans, and the fan operation faults can be caused seriously, and corresponding unmanned monitoring maintenance mechanisms are lacked in the prior art.
Disclosure of Invention
In order to solve the technical problems in the related art, the invention provides a video judging system for variable frequency energy-saving safety protection of a fan, which can perform targeted detection on variable frequency energy-saving performance and excessive engine oil exudation of a bearing on the fan provided with a variable frequency energy-saving mechanism, so that the intelligent level of fan control is improved, the variable frequency energy-saving level of the fan is maintained, and the possibility of occurrence of various fan faults and accidents is reduced.
According to an aspect of the present invention, there is provided a video judgment system for variable frequency energy-saving safety protection of a blower, the system comprising:
the variable frequency energy-saving mechanism is arranged in the fan and comprises an alternating current-direct current-alternating current converter, and is used for rectifying alternating current into direct current, and then converting the direct current into alternating current with required frequency through an inverter so as to perform variable frequency control on the rotating speed of the fan and change the current air quantity of the fan;
the air quantity detection mechanism is arranged opposite to the air blowing opening of the fan and is used for detecting the current air quantity of the fan;
the curve analysis mechanism is respectively connected with the variable frequency energy-saving mechanism and the air volume detection mechanism and is used for acquiring an in-situ air volume curve graph based on each current air volume corresponding to each moment of the fan detected by the air volume detection mechanism in a time-sharing manner, acquiring a pre-stored ideal air volume curve graph from the variable frequency energy-saving mechanism and judging the fitting effect of the two curve graphs to determine the corresponding air volume adjustment performance level;
the bearing acquisition mechanism is arranged right above a bearing of the fan and is used for performing visual acquisition processing on a working scene of the bearing so as to obtain a corresponding working scene image;
the content enhancement device is connected with the bearing acquisition mechanism and is used for sequentially executing gamma correction operation, image content enhancement operation applying logarithmic transformation and image content sharpening operation applying high-pass filtering on the received working scene images so as to obtain corresponding sequential enhancement images;
the coverage analysis device is connected with the content enhancement device and is used for detecting each pixel point occupied by the oil body in the sequential enhancement image to be used as each oil body pixel point, and determining the corresponding oil body distribution area based on the reference depth of field value of each oil body pixel point, the total number of the oil body pixel points and the imaging focal length of the bearing acquisition mechanism;
the alarm execution device is connected with the coverage analysis device and is used for sending out an overflow excessive alarm signal when the distribution area of the received oil body is more than or equal to the set area limit;
the alarm executing device is also used for sending out an overflow normal signal when the received oil body distribution area is smaller than the set area limit;
the reference depth of field value of each oil body pixel point is the middle value of each depth of field value corresponding to each oil body pixel point.
The video judgment system for the frequency conversion energy-saving safety protection of the fan is energy-saving, environment-friendly and stable in operation. The energy-saving performance of frequency conversion and the pertinence detection of excessive engine oil exudation of the bearing can be carried out on the energy-saving fan of frequency conversion, so that the intelligent level of fan control is improved, and the energy-saving level of frequency conversion of the fan is maintained.
Drawings
Embodiments of the present invention will be described below with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a part of a video judgment system for variable frequency energy-saving safety protection of a fan according to various embodiments of the present invention.
Fig. 2 is a schematic diagram of a part of a video judgment system for frequency conversion, energy saving and safety protection of a fan according to an embodiment a of the present invention.
Fig. 3 is a schematic diagram of a part of a video judgment system for frequency conversion, energy saving and safety protection of a fan according to an embodiment B of the present invention.
Fig. 4 is a schematic diagram of a part of a video judgment system for frequency conversion, energy saving and safety protection of a fan according to an embodiment C of the present invention.
Detailed Description
Embodiments of the video judgment system for fan frequency conversion energy saving safety protection of the present invention will be described in detail below with reference to the accompanying drawings.
Embodiment A
Fig. 1 and fig. 2 are schematic structural diagrams of a video judgment system for variable frequency energy-saving safety protection of a fan according to an embodiment a of the present invention, where the system includes:
the variable frequency energy-saving mechanism is arranged in the fan and comprises an alternating current-direct current-alternating current converter, and is used for rectifying alternating current into direct current, and then converting the direct current into alternating current with required frequency through an inverter so as to perform variable frequency control on the rotating speed of the fan and change the current air quantity of the fan;
the air quantity detection mechanism is arranged opposite to the air blowing opening of the fan and is used for detecting the current air quantity of the fan;
the curve analysis mechanism is respectively connected with the variable frequency energy-saving mechanism and the air volume detection mechanism and is used for acquiring an in-situ air volume curve graph based on each current air volume corresponding to each moment of the fan detected by the air volume detection mechanism in a time-sharing manner, acquiring a pre-stored ideal air volume curve graph from the variable frequency energy-saving mechanism and judging the fitting effect of the two curve graphs to determine the corresponding air volume adjustment performance level;
the curve analysis mechanism further comprises a FLASH memory chip, and is used for storing the field air volume curve graph, the ideal air volume curve graph and the determined corresponding air volume adjustment performance level;
the bearing acquisition mechanism is arranged right above a bearing of the fan and is used for performing visual acquisition processing on a working scene of the bearing so as to obtain a corresponding working scene image;
the content enhancement device is connected with the bearing acquisition mechanism and is used for sequentially executing gamma correction operation, image content enhancement operation applying logarithmic transformation and image content sharpening operation applying high-pass filtering on the received working scene images so as to obtain corresponding sequential enhancement images;
the coverage analysis device is connected with the content enhancement device and is used for detecting each pixel point occupied by the oil body in the sequential enhancement image to be used as each oil body pixel point, and determining the corresponding oil body distribution area based on the reference depth of field value of each oil body pixel point, the total number of the oil body pixel points and the imaging focal length of the bearing acquisition mechanism;
the alarm execution device is connected with the coverage analysis device and is used for sending out an overflow excessive alarm signal when the distribution area of the received oil body is more than or equal to the set area limit;
the alarm executing device may be one of an optical alarm device, an acoustic alarm device or an acousto-optic alarm device, for sending out an overflow excessive alarm signal when the distribution area of the received oil body is greater than or equal to a set area limit;
the alarm executing device is also used for sending out an overflow normal signal when the received oil body distribution area is smaller than the set area limit;
the reference depth of field value of each oil body pixel point is the middle value of each depth of field value corresponding to each oil body pixel point.
Embodiment B
Fig. 1 and fig. 3 are schematic structural diagrams of a video judgment system for variable frequency energy-saving safety protection of a fan according to an embodiment B of the present invention.
As shown in fig. 1 and fig. 3, a video judgment system for variable frequency energy-saving safety protection of a fan according to an embodiment B of the present invention may include:
the variable frequency energy-saving mechanism is arranged in the fan and comprises an alternating current-direct current-alternating current converter, and is used for rectifying alternating current into direct current, and then converting the direct current into alternating current with required frequency through an inverter so as to perform variable frequency control on the rotating speed of the fan and change the current air quantity of the fan;
the air quantity detection mechanism is arranged opposite to the air blowing opening of the fan and is used for detecting the current air quantity of the fan;
the curve analysis mechanism is respectively connected with the variable frequency energy-saving mechanism and the air volume detection mechanism and is used for acquiring an in-situ air volume curve graph based on each current air volume corresponding to each moment of the fan detected by the air volume detection mechanism in a time-sharing manner, acquiring a pre-stored ideal air volume curve graph from the variable frequency energy-saving mechanism and judging the fitting effect of the two curve graphs to determine the corresponding air volume adjustment performance level;
the bearing acquisition mechanism is arranged right above a bearing of the fan and is used for performing visual acquisition processing on a working scene of the bearing so as to obtain a corresponding working scene image;
the content enhancement device is connected with the bearing acquisition mechanism and is used for sequentially executing gamma correction operation, image content enhancement operation applying logarithmic transformation and image content sharpening operation applying high-pass filtering on the received working scene images so as to obtain corresponding sequential enhancement images;
the coverage analysis device is connected with the content enhancement device and is used for detecting each pixel point occupied by the oil body in the sequential enhancement image to be used as each oil body pixel point, and determining the corresponding oil body distribution area based on the reference depth of field value of each oil body pixel point, the total number of the oil body pixel points and the imaging focal length of the bearing acquisition mechanism;
the alarm execution device is connected with the coverage analysis device and is used for sending out an overflow excessive alarm signal when the distribution area of the received oil body is more than or equal to the set area limit;
the frequency division communication device is connected with the coverage analysis device and is used for wirelessly transmitting overflow excessive information to a remote fan management server through a frequency division duplex communication link when the distribution area of the received oil body is larger than or equal to a set area limit;
alternatively, a time division communication device may be used, and connected to the coverage analysis device, and configured to wirelessly send the overflow excessive information to the remote fan management server through a time division duplex communication link when the received oil body distribution area is greater than or equal to the set area limit.
Embodiment C
Fig. 1 and fig. 4 are schematic structural diagrams of a video judgment system for frequency conversion, energy saving and safety protection of a fan according to an embodiment C of the present invention.
As shown in fig. 1 and fig. 4, a video judgment system for variable frequency energy-saving safety protection of a fan according to embodiment C of the present invention may include:
the variable frequency energy-saving mechanism is arranged in the fan and comprises an alternating current-direct current-alternating current converter, and is used for rectifying alternating current into direct current, and then converting the direct current into alternating current with required frequency through an inverter so as to perform variable frequency control on the rotating speed of the fan and change the current air quantity of the fan;
the air quantity detection mechanism is arranged opposite to the air blowing opening of the fan and is used for detecting the current air quantity of the fan;
the curve analysis mechanism is respectively connected with the variable frequency energy-saving mechanism and the air volume detection mechanism and is used for acquiring an in-situ air volume curve graph based on each current air volume corresponding to each moment of the fan detected by the air volume detection mechanism in a time-sharing manner, acquiring a pre-stored ideal air volume curve graph from the variable frequency energy-saving mechanism and judging the fitting effect of the two curve graphs to determine the corresponding air volume adjustment performance level;
the bearing acquisition mechanism is arranged right above a bearing of the fan and is used for performing visual acquisition processing on a working scene of the bearing so as to obtain a corresponding working scene image;
the content enhancement device is connected with the bearing acquisition mechanism and is used for sequentially executing gamma correction operation, image content enhancement operation applying logarithmic transformation and image content sharpening operation applying high-pass filtering on the received working scene images so as to obtain corresponding sequential enhancement images;
the coverage analysis device is connected with the content enhancement device and is used for detecting each pixel point occupied by the oil body in the sequential enhancement image to be used as each oil body pixel point, and determining the corresponding oil body distribution area based on the reference depth of field value of each oil body pixel point, the total number of the oil body pixel points and the imaging focal length of the bearing acquisition mechanism;
the alarm execution device is connected with the coverage analysis device and is used for sending out an overflow excessive alarm signal when the distribution area of the received oil body is more than or equal to the set area limit;
the frequency division communication device is connected with the coverage analysis device and is used for wirelessly transmitting overflow excessive information to a remote fan management server through a frequency division duplex communication link when the distribution area of the received oil body is larger than or equal to a set area limit;
the fan management server is in wireless connection with a plurality of frequency division communication devices, and each frequency division communication device corresponds to a fan provided with a frequency conversion energy-saving mechanism;
alternatively, the fan management server is in wireless connection with a plurality of time division communication devices, and each time division communication device corresponds to a fan provided with a frequency conversion energy-saving mechanism.
Next, the specific structure of the video judgment system for fan frequency conversion energy-saving safety protection of the invention is further described.
According to any embodiment of the invention, in the video judgment system for the frequency conversion energy-saving safety protection of the fan:
detecting each pixel point occupied by the oil body in the sequential enhanced image to be used as each oil body pixel point, and determining the corresponding oil body distribution area based on the reference depth of field value of each oil body pixel point, the total number of each oil body pixel point and the imaging focal length of the bearing acquisition mechanism comprises: detecting each pixel point occupied by the oil body in the sequential enhanced image based on the color imaging characteristics of the oil body to serve as each oil body pixel point;
wherein detecting each pixel point occupied by the oil body in the sequential enhanced image based on the color imaging feature of the oil body as each oil body pixel point comprises: and taking the pixel points with the color channel values in the sequential reinforcement images matched with the color channel value distribution ranges corresponding to the color imaging characteristics of the oil bodies as single oil body pixel points.
According to any embodiment of the invention, in the video judgment system for the frequency conversion energy-saving safety protection of the fan:
detecting each pixel point occupied by the oil body in the sequential enhanced image to serve as each oil body pixel point, and determining a corresponding oil body distribution area based on the reference depth of field value of each oil body pixel point, the total number of each oil body pixel point and the imaging focal length of the bearing acquisition mechanism further comprises: the determined corresponding oil body distribution area is monotonically and positively correlated with the reference depth of field value of each oil body pixel point;
detecting each pixel point occupied by the oil body in the sequential enhanced image to serve as each oil body pixel point, and determining a corresponding oil body distribution area based on the reference depth of field value of each oil body pixel point, the total number of each oil body pixel point and the imaging focal length of the bearing acquisition mechanism further comprises: the determined corresponding oil body distribution area is monotonically and positively correlated with the total number of the oil body pixel points;
detecting each pixel point occupied by the oil body in the sequential enhanced image to serve as each oil body pixel point, and determining a corresponding oil body distribution area based on the reference depth of field value of each oil body pixel point, the total number of each oil body pixel point and the imaging focal length of the bearing acquisition mechanism further comprises: the determined corresponding oil body distribution area is monotonically and positively correlated with the imaging focal length of the bearing acquisition mechanism.
According to any embodiment of the invention, in the video judgment system for the frequency conversion energy-saving safety protection of the fan:
based on each current air quantity of the fan, which is detected by the air quantity detection mechanism in a time-sharing manner, and corresponding to each moment, the method for acquiring the field air quantity curve graph, and acquiring the pre-stored ideal air quantity curve graph from the frequency conversion energy-saving mechanism, the fitting effect of the two curve graphs is judged to determine the corresponding air quantity regulation performance level comprises the following steps: the fitting effect of the two graphs judges that the closer the two graphs are, the higher the corresponding air quantity regulation performance level is determined;
the method for determining the air quantity regulation performance level comprises the steps of acquiring an in-situ air quantity curve graph based on each current air quantity of the fan, which is detected by the air quantity detection mechanism in a time-sharing manner, and acquiring a pre-stored ideal air quantity curve graph from the frequency conversion energy-saving mechanism, wherein the step of judging the fitting effect of the two curve graphs to determine the corresponding air quantity regulation performance level further comprises the following steps: carrying out absolute value processing after difference value calculation on the numerical values corresponding to the two graphs at each moment to obtain an absolute value corresponding to each moment, carrying out mean value calculation for removing the most value on the absolute values corresponding to the moment to obtain a reference absolute value mean value, and determining a corresponding air quantity regulation performance grade based on the reference absolute value mean value;
the method for determining the air quantity regulation performance level based on the reference absolute value average value comprises the following steps of: the smaller the reference absolute value average value is, the higher the corresponding air quantity adjusting performance level is determined.
In addition, in the video judgment system for fan frequency conversion energy saving safety protection, performing absolute value processing after difference value calculation on the values corresponding to the two graphs at each moment to obtain absolute values corresponding to each moment, performing mean value calculation for removing the most value on the absolute values corresponding to each moment to obtain a reference absolute value mean value, and determining the corresponding air volume adjustment performance level based on the reference absolute value mean value further comprises: and (3) adopting a numerical corresponding formula to express the association relation between the reference absolute value mean value and the corresponding air quantity regulation performance grade.
As can be seen from the embodiments of the present invention, the significant and substantial features of the present invention are embodied as follows:
(1) Based on each current air quantity of the fan, which is detected by the air quantity detection mechanism in a time-sharing way, respectively corresponding to each moment, an in-situ air quantity curve graph is obtained, a pre-stored ideal air quantity curve graph is obtained from the frequency conversion energy-saving mechanism arranged in the fan, and the fitting effect of the two curve graphs is judged to determine the corresponding air quantity regulation performance level, so that the targeted evaluation of the frequency conversion energy-saving performance of the fan is realized;
(2) Measuring the oil body coverage area of the fan bearing by adopting a customized intelligent analysis mode, and executing corresponding alarm operation when the measured oil body coverage area exceeds the limit so as to avoid performance degradation of the fan provided with the variable frequency energy-saving mechanism;
(3) And determining the corresponding oil body distribution area based on the reference depth of field value of each oil body pixel point, the total number of each oil body pixel point and the imaging focal length of the bearing acquisition mechanism, thereby realizing intelligent analysis of the oil body coverage area of the fan bearing.
In the above, although the present disclosure discusses the embodiments of the present invention and the drawings, the present invention is not limited thereto but may be variously modified and changed by those skilled in the art to which the present disclosure pertains without departing from the spirit and scope of the present disclosure as claimed in the appended claims.
Claims (8)
1. A video judgment system for variable frequency energy-saving safety protection of a fan, the system comprising:
the variable frequency energy-saving mechanism is arranged in the fan and comprises an alternating current-direct current-alternating current converter, and is used for rectifying alternating current into direct current, and then converting the direct current into alternating current with required frequency through an inverter so as to perform variable frequency control on the rotating speed of the fan and change the current air quantity of the fan;
the air quantity detection mechanism is arranged opposite to the air blowing opening of the fan and is used for detecting the current air quantity of the fan;
the curve analysis mechanism is respectively connected with the variable frequency energy-saving mechanism and the air volume detection mechanism and is used for acquiring an in-situ air volume curve graph based on each current air volume corresponding to each moment of the fan detected by the air volume detection mechanism in a time-sharing manner, acquiring a pre-stored ideal air volume curve graph from the variable frequency energy-saving mechanism and judging the fitting effect of the two curve graphs to determine the corresponding air volume adjustment performance level;
the fitting effect of the two graphs judges that the closer the two graphs are, the higher the corresponding air quantity adjusting performance level is determined;
the method comprises the steps of performing absolute value processing after difference value calculation on values corresponding to two graphs at each moment to obtain absolute values corresponding to each moment, performing mean value calculation for removing the most value on absolute values corresponding to each moment to obtain a reference absolute value mean value, and determining corresponding air quantity regulation performance grades based on the reference absolute value mean value;
the smaller the average value of the reference absolute value is, the higher the corresponding air quantity adjusting performance level is determined;
wherein, adopting a numerical corresponding formula to express the association relation between the reference absolute value mean value and the corresponding air quantity regulation performance grade;
the bearing acquisition mechanism is arranged right above a bearing of the fan and is used for performing visual acquisition processing on a working scene of the bearing so as to obtain a corresponding working scene image;
the content enhancement device is connected with the bearing acquisition mechanism and is used for sequentially executing gamma correction operation, image content enhancement operation applying logarithmic transformation and image content sharpening operation applying high-pass filtering on the received working scene images so as to obtain corresponding sequential enhancement images;
the coverage analysis device is connected with the content enhancement device and is used for detecting each pixel point occupied by the oil body in the sequential enhancement image to be used as each oil body pixel point, and determining the corresponding oil body distribution area based on the reference depth of field value of each oil body pixel point, the total number of the oil body pixel points and the imaging focal length of the bearing acquisition mechanism;
the alarm execution device is connected with the coverage analysis device and is used for sending out an overflow excessive alarm signal when the distribution area of the received oil body is more than or equal to the set area limit;
the alarm executing device is also used for sending out an overflow normal signal when the received oil body distribution area is smaller than the set area limit;
the reference depth of field value of each oil body pixel point is the middle value of each depth of field value corresponding to each oil body pixel point.
2. The video judgment system for variable frequency energy saving safety protection of a blower of claim 1, further comprising:
and the frequency division communication device is connected with the coverage analysis device and is used for wirelessly transmitting overflow excessive information to a remote fan management server through a frequency division duplex communication link when the distribution area of the received oil body is larger than or equal to a set area limit.
3. The video judgment system for variable frequency energy saving safety protection of a blower of claim 2, further comprising:
the fan management server is in wireless connection with a plurality of frequency division communication devices, and each frequency division communication device corresponds to a fan provided with a frequency conversion energy-saving mechanism.
4. A video judgment system for variable frequency energy saving safety protection of a blower as claimed in any one of claims 1 to 3, wherein:
detecting each pixel point occupied by the oil body in the sequential enhanced image to be used as each oil body pixel point, and determining the corresponding oil body distribution area based on the reference depth of field value of each oil body pixel point, the total number of each oil body pixel point and the imaging focal length of the bearing acquisition mechanism comprises: and detecting each pixel point occupied by the oil body in the sequential enhanced image based on the color imaging characteristics of the oil body to serve as each oil body pixel point.
5. The video judgment system for variable frequency energy-saving safety protection of a fan according to claim 4, wherein:
detecting each pixel point occupied by the oil body in the sequential enhanced image based on the color imaging characteristics of the oil body to serve as each oil body pixel point comprises: and taking the pixel points with the color channel values in the sequential reinforcement images matched with the color channel value distribution ranges corresponding to the color imaging characteristics of the oil bodies as single oil body pixel points.
6. A video judgment system for variable frequency energy saving safety protection of a blower as claimed in any one of claims 1 to 3, wherein:
detecting each pixel point occupied by the oil body in the sequential enhanced image to serve as each oil body pixel point, and determining a corresponding oil body distribution area based on the reference depth of field value of each oil body pixel point, the total number of each oil body pixel point and the imaging focal length of the bearing acquisition mechanism further comprises: the determined corresponding oil body distribution area is monotonically and positively correlated with the reference depth of field value of each oil body pixel point.
7. The video judgment system for variable frequency energy-saving safety protection of a fan according to claim 6, wherein:
detecting each pixel point occupied by the oil body in the sequential enhanced image to serve as each oil body pixel point, and determining a corresponding oil body distribution area based on the reference depth of field value of each oil body pixel point, the total number of each oil body pixel point and the imaging focal length of the bearing acquisition mechanism further comprises: the determined corresponding oil body distribution area is monotonically and positively correlated with the total number of the oil body pixel points.
8. The video judgment system for variable frequency energy-saving safety protection of a blower according to claim 7, wherein:
detecting each pixel point occupied by the oil body in the sequential enhanced image to serve as each oil body pixel point, and determining a corresponding oil body distribution area based on the reference depth of field value of each oil body pixel point, the total number of each oil body pixel point and the imaging focal length of the bearing acquisition mechanism further comprises: the determined corresponding oil body distribution area is monotonically and positively correlated with the imaging focal length of the bearing acquisition mechanism.
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|---|---|---|---|---|
| WO2019213279A1 (en) * | 2018-05-03 | 2019-11-07 | Quantum IR Technologies, LLC | Infrared imaging systems and methods for oil leak detection |
| CN112728948A (en) * | 2019-10-14 | 2021-04-30 | 廊坊京磁精密材料有限公司 | Cooling air volume control system and method for neodymium iron boron sintering process |
| CN111080607B (en) * | 2019-12-12 | 2020-10-09 | 哈尔滨市科佳通用机电股份有限公司 | Rolling bearing oil slinging fault detection method based on image recognition |
| CN113087558B (en) * | 2021-04-15 | 2022-07-12 | 水利部交通运输部国家能源局南京水利科学研究院 | Compost ventilation control method capable of intelligently and quickly fitting air volume |
| CN114282299B (en) * | 2021-12-31 | 2022-08-26 | 江阴市扬名塑业有限公司 | Hard PVC material dosage conversion system and method |
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