CN114814265A - Non-contact real-time detection method for fan in high-frequency interference environment - Google Patents
Non-contact real-time detection method for fan in high-frequency interference environment Download PDFInfo
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- CN114814265A CN114814265A CN202210484944.5A CN202210484944A CN114814265A CN 114814265 A CN114814265 A CN 114814265A CN 202210484944 A CN202210484944 A CN 202210484944A CN 114814265 A CN114814265 A CN 114814265A
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000011897 real-time detection Methods 0.000 title claims abstract description 19
- 238000001514 detection method Methods 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 19
- 238000004364 calculation method Methods 0.000 claims abstract description 10
- 238000009434 installation Methods 0.000 claims description 5
- 230000001678 irradiating effect Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000010835 comparative analysis Methods 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 abstract description 9
- 230000003993 interaction Effects 0.000 abstract description 2
- 230000008054 signal transmission Effects 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 description 6
- 238000007689 inspection Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/36—Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/187—Machine fault alarms
Abstract
The invention discloses a non-contact real-time detection method for a fan in a high-frequency interference environment, which belongs to the technical field of fan fault detection of short-wave transmitters and comprises the following specific steps: (1) installing and deploying a system; (2) acquiring signals in real time; (3) data acquisition and calculation; (4) judging and displaying by the upper computer; the invention utilizes the reflection characteristics of laser and the difference of the reflection characteristics of the laser of different materials, combines with the algorithm of pulse counting, adopts full digital signal transmission and calculation, thus realizing real-time accurate counting in a high-frequency environment in the non-contact process, then calculating the collected pulse data of each path, and transmitting the data to an upper computer through a serial port, realizing real-time monitoring of the fan through human-computer interaction software, and effectively preventing and controlling the influence of fan faults on transmitter equipment and safe broadcasting; the method fills the blank of the transmitter fan real-time detection field in China, and provides a method for realizing real-time monitoring in a high-frequency interference environment.
Description
Technical Field
The invention relates to the technical field of fan fault detection of short-wave transmitters, in particular to a non-contact real-time detection method for a fan in a high-frequency interference environment.
Background
When the short-wave transmitter works, a large amount of heat can be dissipated by the components, and if the heat is not dissipated in time, the performance of the components is reduced or even the components are burnt due to overheating; at present, the main cooling modes of the 150KW transmitter are wind cooling and water cooling; the wind contact mainly detects the blowing of high-cycle (high-end and high-front-stage electron tube bases, emission tube lamp core columns, filaments, grids, high-cycle slot coils and cavity feed tubes) and PSM modules, and axial flow fans are adopted for blowing and cooling high-end transformers, 400V power supplies, oil loads and other components with large heat productivity; at present, fault detection of axial flow fans of short-wave transmitters is mainly realized through manual inspection, but due to the reasons of installation positions of the fans and the like, it is difficult to check whether the fans normally operate if a cabinet door of the inspection machine is not opened at ordinary times, and some fans stop operating after high pressure falls or the cabinet door is opened, such as an oil load and a 400V fan, check whether the fans are normal at this time, and need to perform operation of closing the inspection machine and protecting the inspection machine under the condition of short-circuit door opening and closing, so that the safety risk is increased;
due to the reasons of high-frequency interference, installation position and the like, no method and system for detecting the cooling fan in real time in the transmitter work are provided in China at present; through analysis, a non-contact method can be adopted for monitoring the fan, but high-frequency interference exists in the range of a short-wave transmitter, and the requirements on a test method and a sensor in the non-contact method are higher; therefore, a non-contact real-time detection method for the fan in a high-frequency interference environment is provided.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a non-contact real-time detection method for a fan in a high-frequency interference environment.
In order to achieve the purpose, the invention adopts the following technical scheme:
a non-contact real-time detection method for a fan in a high-frequency interference environment comprises the following specific steps:
(1) and (3) system installation and deployment: installing a plurality of laser sensors in the multi-path fans at different positions, electrically connecting the laser sensors with a main control board, and supplying power to the laser sensors by using the main control board; each laser sensor is installed in parallel with each fan blade, and a reflection distinguishing material is attached to one fan blade of each fan blade;
(2) signal real-time acquisition: acquiring the return quantity of the laser pulse emitted by each laser sensor on each fan reflection distinguishing material within 1 second in real time, namely a digital signal, and transmitting the digital signal to the main control board;
(3) data acquisition and calculation: the main control board carries out data acquisition and calculation on digital signals sent back by each path of laser sensor based on a pulse counting program, calculates the rotating speed of each path of fan by using pulse time and a pulse period, obtains the current rotating speed of each path of fan, and transmits the current rotating speed of each path of fan to upper computer software in real time;
(4) and (3) judging and displaying by the upper computer: and the upper computer software acquires the current rotating speed of each fan in real time, performs comparative analysis on the current rotating speed to obtain a fault detection result, and simultaneously displays the current rotating speed and the fault detection result of each fan in real time.
Furthermore, the laser sensor in the step (1) comprises a transmitting end and a receiving end, wherein the transmitting end is amplified by a triode after a vibrating tube sends out a vibrating wave with the frequency of 180KHz, and then laser pulse transmission is carried out through a laser tube; the receiving end only receives the reflected light with the same frequency, namely the reflected laser pulse of 180 KHz.
Further, the reflection distinguishing material in the step (1) is a reflection material having a value different from a value of diffuse reflection of the laser beam by the fan blade, and is used for distinguishing the value of diffuse reflection of the laser beam by the fan blade, so that the laser sensor outputs digital values of "0" and "1" when irradiating the corresponding material.
Further, the main control board in the step (3) is connected with the upper computer, the main control board is specifically a MEGA2560 pro main control board, and the main control board is connected with 6 paths of laser sensors.
Further, the upper computer in the step (4) comprises a storage module, and the storage module is used for storing the threshold interval of the normal rotating speed of each path of fan.
And (4) the upper computer further comprises a comparison module, and the comparison module is used for correspondingly analyzing and comparing the current rotating speed of each fan acquired in real time with the normal rotating speed threshold interval of each fan in the storage module to acquire a fault detection result.
Further, the upper computer in the step (4) further comprises an alarm module which is used for giving an alarm and recording the fault fan according to the fault detection result, so that operators on duty and maintainers can directly, simply and conveniently find and maintain fault points.
Compared with the prior art, the invention has the beneficial effects that:
the method for detecting the draught fan in the high-frequency interference environment in a non-contact mode comprises the steps of utilizing the reflection characteristics of laser and the difference of the reflection characteristics of different materials of the laser, combining with an algorithm of pulse counting, adopting full-digital signal transmission and calculation, achieving real-time accurate counting in the high-frequency environment in the non-contact process, writing a program in a chip according to the actual requirement of the draught fan and the economic angle, calculating and collecting all paths of collected pulse data, conveying the collected pulse data to an upper computer through a serial port, achieving real-time monitoring of the draught fan through human-computer interaction software, and effectively preventing and controlling the influence of draught fan faults on equipment and safe broadcasting; the method fills the blank of the transmitter fan real-time detection field in China, and provides a method for realizing real-time monitoring in a high-frequency interference environment.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is an overall flowchart of a non-contact real-time detection method for a fan in a high-frequency interference environment according to the present invention.
Detailed Description
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.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1, the embodiment discloses a non-contact real-time detection method for a fan in a high-frequency interference environment, and the detection method specifically includes the following steps:
(1) and (3) system installation and deployment: installing a plurality of laser sensors in the multi-path fans at different positions, electrically connecting the plurality of laser sensors with a main control board, and supplying power to the laser sensors by using the main control board; each laser sensor is arranged in parallel with each fan blade, and one fan blade of each fan blade is stuck with a reflection distinguishing material;
specifically, the laser sensor comprises a transmitting end and a receiving end, wherein the transmitting end is amplified by a triode after an oscillating wave with the frequency of 180KHz is emitted by an oscillating tube, and then laser pulse is emitted by a laser tube;
in this example, since the laser sensor uses a modulation process, the receiving end receives only reflected light of the same frequency, i.e., reflected laser pulses of 180 KHz.
Specifically, the reflection distinguishing material is a reflection material with a value different from the diffuse reflection value of the fan blade to the laser, and is used for distinguishing the diffuse reflection value of the fan blade to the laser, so that the laser sensor outputs digital values of '0' and '1' when irradiating the corresponding material;
in this embodiment the reflective distinguishing material may be a smooth piece of paper having an area of not less than 0.5cm by 0.5 cm.
(2) Signal real-time acquisition: acquiring the return quantity of laser pulses emitted by each laser sensor on each path of fan reflection distinguishing material within 1 second in real time, namely digital signals, and transmitting the digital signals to a main control board;
(3) data acquisition and calculation: the main control board carries out data acquisition and calculation on digital signals sent back by each path of laser sensor based on a pulse counting program, calculates the rotating speed of each path of fan by using pulse time and a pulse period, obtains the current rotating speed of each path of fan, and transmits the current rotating speed of each path of fan to upper computer software in real time;
specifically, the main control board is connected with an upper computer, specifically, the main control board is a MEGA2560 pro main control board which is connected with 6 paths of laser sensors;
in this example, the MEGA2560 pro master control board may be replaced by a master control board of the STM32 series, but the number of monitoring paths may be different according to the model of the master control board, which is determined by the external interrupt port of each chip.
(4) And (3) judging and displaying by the upper computer: and the upper computer software acquires the current rotating speed of each fan in real time, compares and analyzes the current rotating speed to obtain a fault detection result, and simultaneously displays the current rotating speed and the fault detection result of each fan in real time.
Specifically, the upper computer comprises a storage module, wherein the storage module is used for storing the threshold interval of the normal rotating speed of each fan;
specifically, the upper computer further comprises a comparison module, which is used for performing corresponding analysis and comparison on the current rotating speed of each path of fan acquired in real time and the normal rotating speed threshold interval of each path of fan in the storage module to acquire a fault detection result;
specifically, the upper computer further comprises an alarm module which is used for alarming and recording a fault fan according to a fault detection result, so that operators on duty and maintainers can directly, conveniently and conveniently find and repair fault points.
The working principle of the non-contact real-time detection method for the fan in the high-frequency interference environment is specifically explained by combining an example, and the example is provided with a real-time monitoring system for the cooling fan of the transmitter on a 150KW short-wave transmitter of a machine room B of the national broadcast television bureau, eight, three and one by adopting the method; the specific monitoring process is as follows:
the method comprises the following steps of installing 6 laser sensors in 6 paths of fans at different positions in a machine room, electrically connecting the 6 laser sensors with a MEGA2560 pro main control board, and supplying power to the laser sensors by using the MEGA2560 pro main control board; each laser sensor is arranged in parallel with each fan blade, and a smooth paper sheet of 0.5cm x 0.5cm is attached to one fan blade of each fan blade;
acquiring the return quantity of laser pulses emitted by each laser sensor on each path of fan reflection distinguishing material within 1 second in real time, namely digital signals, and transmitting the digital signals to a MEGA2560 pro main control board;
the MEGA2560 pro main control board carries out data acquisition and calculation on digital signals transmitted back by each path of laser sensor based on a pulse counting program, calculates the rotating speed (r/min) of each path of fan by using pulse time and a pulse period, obtains the current rotating speed (r/min) of each path of fan, and transmits the current rotating speed (r/min) of each path of fan to upper computer software in real time;
the upper computer software acquires the current rotating speed of each fan in real time, extracts the threshold interval of the normal rotating speed of each fan in the storage module, performs corresponding comparison and analysis to obtain a fault detection result, and simultaneously displays the current rotating speed and the fault detection result of each fan in real time;
alarming and recording the fault fan according to the fault detection result, so that operators on duty and on-line can visually and simply find and repair fault points;
the method fills the domestic blank in the field of real-time detection of the transmitter fan, and provides a method for realizing real-time monitoring in a high-frequency interference environment.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. A non-contact real-time detection method for a fan in a high-frequency interference environment is characterized by comprising the following specific steps:
(1) and (3) system installation and deployment: installing a plurality of laser sensors in the multi-path fans at different positions, electrically connecting the laser sensors with a main control board, and supplying power to the laser sensors by using the main control board; each laser sensor is installed in parallel with each fan blade, and a reflection distinguishing material is attached to one fan blade of each fan blade;
(2) signal real-time acquisition: acquiring the return quantity of the laser pulse emitted by each laser sensor on each fan reflection distinguishing material within 1 second in real time, namely a digital signal, and transmitting the digital signal to the main control board;
(3) data acquisition and calculation: the main control board carries out data acquisition and calculation on digital signals sent back by each path of laser sensor based on a pulse counting program, calculates the rotating speed of each path of fan by using pulse time and a pulse period, obtains the current rotating speed of each path of fan, and transmits the current rotating speed of each path of fan to upper computer software in real time;
(4) and (3) judging and displaying by the upper computer: and the upper computer software acquires the current rotating speed of each fan in real time, performs comparative analysis on the current rotating speed to obtain a fault detection result, and simultaneously displays the current rotating speed and the fault detection result of each fan in real time.
2. The non-contact real-time detection method for the fan in the high-frequency interference environment according to claim 1, wherein the laser sensor in the step (1) comprises a transmitting end and a receiving end, the transmitting end is amplified by a triode after an oscillating tube sends an oscillating wave with a frequency of 180KHz, and then laser pulse transmission is carried out through a laser tube; the receiving end only receives the reflected light with the same frequency, namely the reflected laser pulse of 180 KHz.
3. The method according to claim 1, wherein the reflection distinguishing material in the step (1) is a reflection material having a value different from a value of diffuse reflection of the fan blade to the laser light, and is used for distinguishing the value of diffuse reflection of the fan blade to the laser light, so that the laser sensor outputs digital values "0" and "1" when irradiating the corresponding material.
4. The non-contact real-time detection method for the fan in the high-frequency interference environment according to claim 1, wherein the main control board in the step (3) is connected with an upper computer, and the main control board is specifically a MEGA2560 pro main control board which is connected with 6 laser sensors.
5. The non-contact real-time detection method for the fan in the high-frequency interference environment according to claim 1, wherein the upper computer in the step (4) comprises a storage module, and the storage module is used for storing a threshold interval of a normal rotating speed of each path of fan.
6. The non-contact real-time detection method for the fans in the high-frequency interference environment according to claim 1, wherein the upper computer in the step (4) further comprises a comparison module, which is used for correspondingly analyzing and comparing the current rotating speed of each fan obtained in real time with the normal rotating speed threshold interval of each fan in the storage module, so as to obtain a fault detection result.
7. The non-contact real-time detection method for the fan in the high-frequency interference environment according to claim 1, wherein the upper computer in the step (4) further comprises an alarm module for alarming and recording a fault fan according to a fault detection result, so that an operator on duty and a maintainer can visually and simply find and repair a fault point.
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| CN202210484944.5A CN114814265A (en) | 2022-05-06 | 2022-05-06 | Non-contact real-time detection method for fan in high-frequency interference environment |
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| CN202210484944.5A CN114814265A (en) | 2022-05-06 | 2022-05-06 | Non-contact real-time detection method for fan in high-frequency interference environment |
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Cited By (1)
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2022
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| CN115327214A (en) * | 2022-10-13 | 2022-11-11 | 国网山东省电力公司高密市供电公司 | High-voltage equipment live indicating device and high-voltage equipment live judging method |
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