WO2009024052A1 - Measuring device, method and electronic device for measuring blinding degree of dust screen - Google Patents

Measuring device, method and electronic device for measuring blinding degree of dust screen Download PDF

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Publication number
WO2009024052A1
WO2009024052A1 PCT/CN2008/071903 CN2008071903W WO2009024052A1 WO 2009024052 A1 WO2009024052 A1 WO 2009024052A1 CN 2008071903 W CN2008071903 W CN 2008071903W WO 2009024052 A1 WO2009024052 A1 WO 2009024052A1
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WO
WIPO (PCT)
Prior art keywords
wind speed
fan
detecting unit
clogging
wind
Prior art date
Application number
PCT/CN2008/071903
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French (fr)
Chinese (zh)
Inventor
Gang Wei
Yirong Liao
Wei Shui
Original Assignee
Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2009024052A1 publication Critical patent/WO2009024052A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
    • B01D46/0086—Filter condition indicators

Definitions

  • Air filter clogging degree detecting device and method, and electronic device Air filter clogging degree detecting device and method, and electronic device
  • the present invention relates to the field of electronic device detection, and in particular, to an apparatus and method for detecting a degree of clogging of a dustproof net, and an electronic device.
  • the timer is added to allow the user to set the timer length according to the running environment of the device. After the timer expires, the alarm is sent to the NMS to alert the user to check and clean the air filter.
  • the detection system includes a timer module 240 that is mounted on a dust screen.
  • the timer module 240 includes: a housing 230, a timer circuit 224, a START button 222, a STOP button 258, a test (TEST) button 252, a time setting circuit 254, a display screen 250, and a speaker 226. , indicator light 260, sensor 256, and remote indicator light 262.
  • the timer circuit 224, the start button 222, the stop button 258, the test button 252, the time setting circuit 254, the display screen 250, the speaker 226, the indicator light 260, and the sensor 256 are disposed in the housing 230.
  • the timer duration is manually set by the time setting circuit 254, and then the start button 222 is started to start timing.
  • the display 250 will display the number of days from the start of the start or the number of days required to display the device alarm.
  • the detection system will send an alarm reminder, through the speaker 226 and the indicator light 260 To remind users to clean or replace the air filter.
  • the test button 252 is used for self-test of the power supply and timing circuits, and is used to determine whether the timer is set properly.
  • the self-test results can be output via the speaker or via the display.
  • the service life of the air filter is easily affected by other external conditions, such as the operation time of the fan, the airflow rate through the air filter, and the mixed components in the air.
  • the sensor 256 is used to detect the air condition, the airflow, and the state of the fan in the environment where the air filter is placed, and controls the timer according to the detection result.
  • Alarm reminders can also be notified to remote users by means of pagers, e-mail or remotely controlled remote indicators 262.
  • the timing detection method can only notify the user to clean and replace the air filter regularly, and does not take into account the complexity of the communication device application environment and the diversity of design differences. You can only rely on the default configuration or manually set the alarm timing based on experience. It may not be timely alarmed in case of poor environment or false alarm in good environment.
  • the air pressure of the system increases, which causes the air filter to deform.
  • the detection switch detects the deformation of the dust net to determine the degree of clogging of the air filter.
  • the surface of the air filter is basically flat, and the airflow can smoothly pass through the air filter. After the air filter is blocked, the airflow cannot pass through the air filter smoothly.
  • the air pressure difference between the two sides increases, which increases the shape of the air filter.
  • the air filter can be used to detect the air filter. To remind maintenance personnel to check whether the air filter is blocked, so that the air filter can be cleaned and replaced.
  • Embodiments of the present invention provide a device, a method, and an electronic device for detecting a degree of clogging of a dustproof net, which can be adapted to various environments to detect the degree of clogging of the air filter.
  • An embodiment of the present invention provides a dust net clogging degree detecting device, the device comprising: a wind speed detecting unit, a data conversion module, and a clogging detecting unit,
  • the wind speed detecting unit is disposed in the air flow channel, configured to obtain a simulated wind speed signal, and provide the simulated wind speed signal to the data conversion module;
  • the data conversion module is connected to the wind speed detecting unit, configured to convert the simulated wind speed signal into a digital wind speed signal, and provide the digital wind speed signal to the jam detecting unit;
  • the jam detecting unit is connected to the data conversion module according to the digital wind speed signal and the speed of the fan
  • the wind resistance characteristic parameter is obtained, and the clogging degree of the air filter is determined according to the wind resistance characteristic parameter and the alarm threshold.
  • An embodiment of the present invention further provides an electronic device, wherein the electronic device is provided with a single board and a fan, and the air inlet and the air outlet are opened on the electronic device, and the fan is used to generate airflow, and The airflow flows in from the air inlet, flows out from the air outlet, forms an air flow passage, and is provided with a dustproof net at the air inlet.
  • the electronic device includes a dust net clogging degree detecting device, and the device includes: a wind speed detecting unit a data conversion module and a jam detection unit, wherein: the wind speed detecting unit is disposed in the air flow channel for obtaining a simulated wind speed signal, and providing the simulated wind speed signal to the data conversion module;
  • the data conversion module is connected to the wind speed detecting unit, configured to convert the simulated wind speed signal into a digital wind speed signal, and provide the digital wind speed signal to the jam detecting unit;
  • the clogging detecting unit is connected to the data conversion module, and obtains a wind resistance characteristic parameter according to the digital wind speed signal and a rotation speed of the fan, and determines a clogging degree of the air filter according to the wind resistance characteristic parameter and the alarm threshold.
  • the embodiment of the invention further provides a method for detecting the degree of clogging of the air filter, comprising:
  • the embodiment of the present invention detects the clogging degree of the air filter by detecting the wind speed of the air filter, and can adapt to various environments and various air filters, without relying on default configuration or human experience, but directly
  • the alarm is generated according to the degree of clogging of the air filter determined by the hurricane speed to notify the user to periodically clean or replace the air filter, thereby ensuring the heat dissipation performance of the electronic device and ensuring the operational stability of the electronic device.
  • FIG. 1 is a structural view showing a detecting device for the degree of clogging of a dust filter in the prior art
  • FIG. 2 is a structural view of an electronic device with a dust net clogging degree detecting device according to Embodiment 1 of the present invention
  • FIG. 3 is a structural view showing a dust net clogging degree detecting device according to Embodiment 1 of the present invention
  • FIG. 4 is a flowchart showing a method for detecting a degree of clogging of a dustproof net according to Embodiment 2 of the present invention
  • FIG. 5 is a flowchart of obtaining an initial wind resistance characteristic parameter according to Embodiment 2 of the present invention.
  • FIG. 6 is a flowchart of obtaining current wind resistance characteristic parameters according to Embodiment 2 of the present invention.
  • the degree of clogging of the air filter is detected by detecting the change of the wind speed in the air flow channel.
  • the detection criteria are changed at any time according to changes in the application environment (such as changes in hardware configuration) in the electronic device, so that the embodiments of the present invention can be adapted to various application environments of the electronic device.
  • the following describes a method for detecting the degree of clogging of the air filter according to the specific embodiment.
  • the first embodiment describes a device for detecting the degree of clogging of the air filter
  • the second embodiment describes a method for detecting the degree of clogging of the air filter.
  • Embodiment 3 describes an electronic device having a detecting device for the degree of clogging of the air filter.
  • the dust net clogging degree detecting device of this embodiment is applied to an electronic device. Next, the dust clogging degree detecting device will be described in detail.
  • Figure 2 is an electronic device with a dust net clogging degree detecting device.
  • the electronic device is provided with a single board (not shown), a fan 4, and an air inlet 8 and an air outlet 7 are formed on the electronic device, and the fan 4 is configured to generate an air flow and make the air flow. It flows in from the air inlet 8 and flows out from the air outlet 7, thereby forming an air flow passage 11 to dissipate heat to the single board.
  • An air filter 3 is disposed at the air inlet 8 to block dust from entering the electronic device.
  • the fan 4 is mounted on the fan frame 10, and the air inlet 8 and the air outlet 7 are opened on the cabinet 9 of the electronic device.
  • the fan 4 is disposed in the air flow passage.
  • the board is disposed in the cabinet 9. When the airflow passes through the airflow channel 11, the board configuration of the electronic device can be dissipated to ensure stable operation of the electronic device.
  • the air filter clogging degree detecting device is mounted in the electronic device, and is based on the electronic device applying the dust clogging degree detecting device.
  • the air filter clogging degree detecting device includes:
  • the wind speed detecting unit 2 is disposed in the air flow channel for obtaining the simulated wind speed signal, and the analog wind speed signal is supplied to the data conversion module 303;
  • a data conversion module 303 coupled to the wind speed detecting unit 2, for converting the simulated wind speed signal into a digital wind speed signal, and providing the digital wind speed signal to the jam detecting unit 1;
  • the clogging detecting unit 1 is connected to the data conversion module 303, and obtains a wind resistance characteristic parameter according to the digital wind speed signal and the rotation speed of the fan, and determines the clogging degree of the air filter according to the wind resistance characteristic parameter and the alarm threshold.
  • the air filter clogging degree detecting device includes a wind speed detecting unit 2, a data converting module 303, and a clogging detecting unit 1.
  • the wind speed detecting unit 2 is disposed inside the air filter 3, and is configured to convert the wind speed passing through the air filter 3 into a simulated wind speed signal (such as a voltage, a current signal, etc.) and simulate the wind speed.
  • the signal is provided to the data conversion module 303;
  • the data conversion module 303 is connected to the wind speed detecting unit 2 for converting the simulated wind speed signal into a digital wind a speed signal, and the digital wind speed signal is provided to the jam detecting unit 1;
  • the clogging detecting unit 1 is connected to the data conversion module 303, and obtains a wind resistance characteristic parameter according to the digital wind speed signal and the rotational speed of the fan, and determines the clogging degree of the air filter according to the wind resistance characteristic parameter and the alarm threshold.
  • the jam detection unit 1 includes: a processing module 304 and a memory 305.
  • the processing module 304 is connected to the data conversion module 303, and obtains a wind resistance characteristic parameter according to the digital wind speed signal and the rotational speed of the fan (see the second embodiment for obtaining the method), and determines the clogging degree of the air filter according to the wind resistance characteristic parameter and the alarm threshold. (For the determination method, see Example 2);
  • the memory 305 is configured to store initial wind resistance characteristic parameters, initial wind speed, fan speed, and alarm threshold.
  • the alarm threshold may be determined by an initial wind resistance characteristic parameter or set according to experience in advance.
  • the alarm threshold is determined by an initial wind resistance characteristic parameter.
  • the alarm threshold may be stored in the memory 305, and the initial wind resistance characteristic parameter may be determined according to an initial wind speed, a fan speed, or the like.
  • the air filter clogging degree detecting device further includes a fan control unit 301 connected to the fan in the electronic device and the processing module of the clogging detecting unit 1 for controlling the rotation speed of the fan 4, and the fan 4 is The rotation speed information is supplied to the clogging detecting unit 1.
  • the data conversion module 303, the jam detection unit 1 and the fan control unit 301 can be integrated.
  • the wind speed detecting unit 2 and the data conversion module 303 can be integrated into one body, such as a digital wind speed sensor.
  • the digital wind speed signal can be directly obtained, and then the digital wind speed signal is supplied to the jam detecting unit 1 through the digital wind speed sensor. Therefore, the wind resistance characteristic parameter is obtained according to the digital wind speed signal and the rotation speed of the fan 4, and the degree of clogging of the air filter can be determined according to the wind resistance characteristic parameter and the alarm threshold.
  • the dust screen clogging degree detecting means may further include a signal processing means 302.
  • the signal processing device 302 is provided to be connected to the wind speed detecting unit 2 for processing (such as filtering and/or amplifying) the wind speed signal output by the wind speed detecting unit 2, and the main function is to improve signal quality and transmission capability, and then The processing signal is sent to the data conversion module 303 (the wind speed detecting unit 2 and the data conversion module 303 are separated) or the jam detecting unit 1 (integrated with the wind speed detecting unit 2 and the data conversion module 303), so that when the wind speed detecting unit 2 When the detected simulated wind speed signal is of poor quality, the jam detection unit can still obtain a better quality signal for subsequent processing.
  • the air filter clogging degree detecting device further includes an alarm module 306, and is connected to the clogging detecting unit 1 for alarming by sound and light to indicate that the air filter is blocked.
  • the jam detecting unit 1 can be connected to the network tube or the host computer 6 through the alarm cable 5.
  • the network management unit or the upper computer 6 is configured to receive an alarm signal sent by the congestion detection unit 1 to notify the remote user to take timely measures, such as cleaning the air filter or replacing the air filter, thereby ensuring the heat dissipation performance of the electronic device and enabling the electronic device.
  • the device runs stably.
  • the method for detecting the degree of clogging of the air filter includes: collecting the rotation speed of the fan and the wind speed parameter at the rotation speed; obtaining the wind resistance characteristic parameter according to the rotation speed of the fan and the wind speed parameter at the rotation speed; according to the current wind resistance characteristic
  • the parameters and alarm thresholds determine the degree of clogging of the air filter.
  • the wind speed parameter can be a digital wind speed signal.
  • the method for detecting the degree of clogging of the air filter will be described in detail below with reference to FIG.
  • the detection method includes the following steps:
  • Step 41 The air filter blocking detection device is powered on and the system is configured;
  • Step 42 Perform initial feature parameter collection of the system, and calculate a system initial wind resistance characteristic parameter K1 and an alarm threshold X.
  • Step 43 Determine whether the timing detection condition is true, and if yes, perform step 44, otherwise, repeat this step;
  • the detection condition may be a predetermined time interval, such as every other day, or a certain time of day, such as 23 o'clock every day;
  • Step 44 The system performs the detection of the degree of clogging of the air filter, and obtains the current system wind resistance characteristic parameter K2;
  • Step 45 Determine whether the current windage characteristic parameter K2 is greater than the alarm threshold X. If yes, it indicates that the air filter is more severely blocked, and step 46 is performed; otherwise, return to step 43.
  • Step 46 Send an alarm or notify the user to clean the dust.
  • the hardware configuration of the same electronic device varies greatly in the unused application scenarios, so the system has a large difference in wind resistance; in addition, since most electronic devices are adjustable in speed for improving heat dissipation performance
  • the fan can be judged and processed by the fan closed-loop speed regulation and a predetermined algorithm to detect and alarm the degree of clogging of the air filter.
  • step 42 the initial feature parameters of the system need to be collected, and the initial wind resistance characteristic parameter of the system is calculated, and then the alarm threshold determined by the initial wind resistance characteristic parameter is calculated.
  • the initial characteristic parameter of the system is that under the condition that the air filter is cleaned, such as the initial power-on of the system, the modification/system hardware configuration, or the air filter update, the processing module 304 sends a control signal, by adjusting the rotation speed of the fan 4, and Read the fan speed value. Then, the digital wind speed signal corresponding to each speed is collected by the wind speed detecting unit, and the initial wind resistance characteristic parameter K1 of the system is obtained according to a predetermined algorithm, and the alarm threshold is determined by the initial wind resistance characteristic parameter K1 of the system, and the alarm threshold is stored in the memory 305.
  • the alarm threshold can also be a preset empirical value. As shown in Fig. 5, the method of calculating the initial wind resistance characteristic parameter K1 of the system and the alarm threshold determined by the initial wind resistance characteristic parameter K1 of the system will be described below.
  • Step 501 the fan speed is adjusted by the processing module to a specific speed point
  • Step 502 delay, until the fan speed is constant
  • Step 503 collecting a wind speed signal, the fan speed RPM1 and the corresponding wind speed signal VI are obtained;
  • Step 504 Determine whether the wind speeds of all the speed points are collected. If yes, go to step 505. Otherwise, go back to step 501 until the wind speed signals are collected at all speed points.
  • Step 505 Calculate an initial wind resistance characteristic parameter K1.
  • V - ( 1 )
  • the wind speed signal is proportional to the fan speed.
  • a V can be used as the wind resistance characteristic parameter Kl.
  • a wind speed is the highest; when the dust net is clogged due to dust deposition (ie, when it becomes larger), the wind speed will decrease;
  • Step 506 Calculate an alarm threshold X according to the initial wind resistance characteristic parameter K1 and the initial wind resistance characteristic parameter K1 of the system, and the X value ranges from 100% to 200% of K1.
  • step 44 the system performs detection of air filter clogging to obtain the current system wind resistance characteristic parameter ⁇ 2.
  • Department During the system operation, the following detection operations are performed periodically to obtain the current wind resistance characteristic parameter of the system:
  • the processing module 304 issues a control signal to adjust the rotation speed of the fan 4 and read the rotation speed value of the fan. Then, the digital wind speed signal corresponding to each speed is collected by the signal processing device 302 and the data conversion module 303, and the wind resistance characteristic parameter K2 of the system is obtained according to a predetermined algorithm in the processing module 304. As shown in Fig. 6, a method of obtaining the current system wind resistance characteristic parameter ⁇ 2 will be described below.
  • Step 602 The processing module adjusts the fan speed to a certain speed point
  • Step 603 Stabilize for a period of time until the fan speed is constant
  • Step 604 Collect a wind speed signal. Thereby obtaining the fan speed RPMD1 and the corresponding wind speed signal VD1;
  • Step 605 Determine whether the wind speeds of all the speed points are collected. If yes, go to step 606. Otherwise, go back to step 602 until the wind speed signals are collected at all speed points.
  • Step 606 When the wind speeds of all the speed points are collected, the data of a set of fan speeds and corresponding wind speed signals can be obtained: [RPMD1, VD1], [RPMD2, VD2], [RPMD3, VD3] uffamn, VDn].
  • the wind resistance characteristic parameter K2 can be obtained according to the method described in the step 505.
  • the wind resistance characteristic parameter ⁇ 2 is compared with the alarm threshold X to determine whether the air filter is clogged. If the alarm threshold is exceeded, the air filter is blocked, and the system sends an alarm through the alarm module. If there is no alarm, the system performs other operations and waits for the next detection according to the time.
  • An electronic device as shown in FIG. 2, is provided with a single board (not shown) and a fan 4, and an air inlet 8 and an air outlet 7 are opened on the electronic device, and the fan 4 is provided.
  • the airflow is generated, and the airflow flows from the air inlet 8 and flows out from the air outlet 7 to form an air flow passage 11 to dissipate heat to the single board.
  • the air inlet 8 is provided with a dustproof net 3, wherein the electronic device
  • the device includes a dust filter clogging degree detecting device. As shown in FIG. 3, the device includes: a wind speed detecting unit 2, a data conversion module 303, and a clogging detecting unit 1, wherein:
  • the wind speed detecting unit 2 is disposed in the air flow channel 11 for obtaining a simulated wind speed signal, and the analog wind speed signal is provided to the data conversion module 303;
  • the data conversion module 303 is connected to the wind speed detecting unit 2 for converting the simulated wind speed signal into a digital wind speed signal, and providing the digital wind speed signal to the jam detecting unit 1;
  • the clogging detecting unit 1 is connected to the data conversion module 303, and obtains a wind resistance characteristic parameter according to the digital wind speed signal and the rotation speed of the fan 4, and determines the clogging degree of the air filter according to the wind resistance characteristic parameter and the alarm threshold.
  • the air filter clogging degree detecting device further includes: a fan control unit 301 connected to the fan 4 and the clogging detecting unit 1 for controlling the rotation speed of the fan 4, and providing the rotation speed information of the fan to the clogging detecting unit 1 .
  • the data conversion module 303, the jam detection unit 1 and the fan 4 control unit are integrated.
  • the wind speed detecting unit 1 and the data conversion module 303 are integrated.
  • the occlusion detecting unit 1 can directly obtain the wind resistance characteristic parameter according to the digital wind speed signal, and then The degree of clogging of the air filter is determined according to the current wind resistance characteristic parameter and the alarm threshold.
  • the method for determining the alarm threshold is the same as the method described above, that is, determined by the initial wind resistance characteristic parameter, or set in advance according to experience.
  • the embodiment of the invention monitors the degree of clogging of the air filter by using the wind speed detection, and can be applied to a complex communication device application environment, and the alarm is accurate and timely. It shields the effects of individual fan differences (such as changes in fan speed or aging).

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Control Of Positive-Displacement Air Blowers (AREA)
  • Air Conditioning Control Device (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

A measuring device, a method and an electronic device for measuring the blinding degree of a dust screen, said measuring device comprises: a wind speed measuring unit (2), a data transfer model and a blinding measuring unit (1). Said wind speed measuring unit (2) is installed in an air duct to obtain analog wind speed signals, said data transfer model is connected with said wind speed measuring unit (2) to transfer the analog wind speed signals to digital wind speed signals and transmit the digital wind speed signals to the blinding measuring unit (1),said blinding measuring unit (1), which is connected with the data transfer model, determines windage feature parameters according to the digital wind speed signals and the rotating speed of a fan, and therefore determines the blinding degree of the dust screen according to the windage feature parameters and a warning threshold.

Description

一种防尘网堵塞程度检测装置和方法、 及电子设备  Air filter clogging degree detecting device and method, and electronic device
技术领域 Technical field
本发明涉及一种电子设备检测领域， 尤其涉及一种防尘网堵塞程度检测装置和方法、 及电子设备。  The present invention relates to the field of electronic device detection, and in particular, to an apparatus and method for detecting a degree of clogging of a dustproof net, and an electronic device.
背景技术 Background technique
目前电子设备的散热多数是通过风冷散热来实现的， 风冷散热***的性能对设备稳定 运行至关重要。 为了有效散热、 并减少积尘对电子设备的腐蚀， 多数风冷散热***都会安 装防尘网， 特别是对可靠性要求很高的电子设备。 防尘网的积尘状态会直接影响电子设备 风冷性能， 防尘网积尘会导致电子设备换热效能的降低， 影响电子设备的安全稳定运行。  At present, most of the heat dissipation of electronic equipment is achieved by air-cooling and heat dissipation. The performance of the air-cooled cooling system is crucial for the stable operation of the equipment. In order to effectively dissipate heat and reduce the corrosion of electronic equipment by dust accumulation, most air-cooling and cooling systems will install dust-proof nets, especially for electronic equipment with high reliability requirements. The dust accumulation state of the air filter directly affects the air cooling performance of the electronic equipment. The dust accumulation of the air filter will reduce the heat exchange performance of the electronic equipment and affect the safe and stable operation of the electronic equipment.
为了避免因防尘网积尘过多而降低电子设备的换热效能、 影响电子设备的安全稳定运 行， 目前均需要对电子设备上安装的防尘网的堵塞程度进行定期的检测和维护， 确保设备 正常运行， 这需要投入较大的人力成本， 而且因设备运行环境不同， 防尘网堵塞情况也不 一样， 定期维护也不能完全确保防尘网保持正常状态。 因此对防尘网堵塞程度的检测提出 了急迫的需求。  In order to avoid the excessive heat accumulation of the dust filter and reduce the heat transfer performance of the electronic device and affect the safe and stable operation of the electronic device, it is necessary to periodically check and maintain the degree of clogging of the air filter installed on the electronic device to ensure The normal operation of the equipment requires a large labor cost. Due to different operating environments, the air filter is blocked. Regular maintenance cannot ensure that the air filter remains in a normal state. Therefore, there is an urgent need for the detection of the degree of clogging of the air filter.
在现有技术中， 有两种进行防尘网堵塞程度检测的技术： 一是定时检测技术， 二是形 变检测技术。 下面简单介绍这两种技术。  In the prior art, there are two techniques for detecting the degree of clogging of the air filter: one is timing detection technology, and the other is deformation detection technology. The two techniques are briefly described below.
一、 定时检测技术  First, timing detection technology
如图 1所示， 利用增加定时器， 允许用户根据设备运行环境设置定时器时长， 当该定时 器超时后通过声光告警或上报网管， 提醒用户检查和清洗防尘网。  As shown in Figure 1, the timer is added to allow the user to set the timer length according to the running environment of the device. After the timer expires, the alarm is sent to the NMS to alert the user to check and clean the air filter.
该检测***包括定时器模块 240， 其安装在防尘网上。 所述定时器模块 240包括： 壳体 230、 定时器电路 224、 开始 （START ) 按钮 222、 停止 （STOP) 按钮 258、 测试 （TEST ) 按钮 252、 时间设定电路 254、 显示屏 250、 扬声器 226、 指示灯 260、 传感器 256、 以及远程 指示灯 262。 所述定时器电路 224、 开始按钮 222、 停止按钮 258、 测试按钮 252、 时间设定电 路 254、 显示屏 250、 扬声器 226、 指示灯 260、 传感器 256设置在壳体 230中。  The detection system includes a timer module 240 that is mounted on a dust screen. The timer module 240 includes: a housing 230, a timer circuit 224, a START button 222, a STOP button 258, a test (TEST) button 252, a time setting circuit 254, a display screen 250, and a speaker 226. , indicator light 260, sensor 256, and remote indicator light 262. The timer circuit 224, the start button 222, the stop button 258, the test button 252, the time setting circuit 254, the display screen 250, the speaker 226, the indicator light 260, and the sensor 256 are disposed in the housing 230.
当清洗或更换完防尘网后，通过时间设定电路 254手动设定定时器时长，然后启动开始 按钮 222开始计时。 显示屏 250会显示从启动开始计时的天数或者是倒计时显示设备告警还 需要的天数。 当计时到设定时间时， 检测***会发出告警提醒， 通过扬声器 226和指示灯 260 来提醒用户清洗或更换防尘网。 After the air filter is cleaned or replaced, the timer duration is manually set by the time setting circuit 254, and then the start button 222 is started to start timing. The display 250 will display the number of days from the start of the start or the number of days required to display the device alarm. When the time is set to the set time, the detection system will send an alarm reminder, through the speaker 226 and the indicator light 260 To remind users to clean or replace the air filter.
测试按钮 252是用来进行电源、定时电路的自检， 用于判断定时器是否设定合适。 自检 结果可以通过扬声器输出， 也可以通过显示屏显示。  The test button 252 is used for self-test of the power supply and timing circuits, and is used to determine whether the timer is set properly. The self-test results can be output via the speaker or via the display.
由于防尘网的服务周期容易受外界其他的条件所影响， 如风扇操作的时间、 通过防尘 网的气流速率、 空气中的混杂成分等。 传感器 256用于检测防尘网所处环境中的空气条件、 气流和风扇的状态等， 根据检测结果来控制定时器。  The service life of the air filter is easily affected by other external conditions, such as the operation time of the fan, the airflow rate through the air filter, and the mixed components in the air. The sensor 256 is used to detect the air condition, the airflow, and the state of the fan in the environment where the air filter is placed, and controls the timer according to the detection result.
告警提醒也可以通过寻呼机、 e-mail或远程控制的远程指示灯 262等方式来通知偏远地 方的用户。  Alarm reminders can also be notified to remote users by means of pagers, e-mail or remotely controlled remote indicators 262.
由于定时检测方式只能通知用户定时去清理更换防尘网， 没有考虑到通信设备应用环 境的复杂性和设计差异的多样性。 只能依赖缺省配置或者人为依据经验进行告警定时设置， 有可能在环境较差的情况下不能及时告警或者在环境较好的情况下误告警。  The timing detection method can only notify the user to clean and replace the air filter regularly, and does not take into account the complexity of the communication device application environment and the diversity of design differences. You can only rely on the default configuration or manually set the alarm timing based on experience. It may not be timely alarmed in case of poor environment or false alarm in good environment.
二、 形变检测技术  Second, deformation detection technology
利用防尘网堵塞后***风压增大， 导致防尘网发生形变的原理， 通过检测开关检测防 尘网的形变来判断防尘网的堵塞程度。 具体而言， 防尘网没有堵塞时， 防尘网表面是基本 平整的， 气流可以顺利通过防尘网。 防尘网堵塞后， 气流不能顺利通过防尘网， 两侧风压 差增大， 从而使防尘网形变增大， 这时， 可利用防尘网的形变触动检测开关， 产生防尘网 告警， 以提醒维护人员检查防尘网是否堵塞， 从而对防尘网进行清理更换。  After the air filter is blocked, the air pressure of the system increases, which causes the air filter to deform. The detection switch detects the deformation of the dust net to determine the degree of clogging of the air filter. Specifically, when the air filter is not blocked, the surface of the air filter is basically flat, and the airflow can smoothly pass through the air filter. After the air filter is blocked, the airflow cannot pass through the air filter smoothly. The air pressure difference between the two sides increases, which increases the shape of the air filter. In this case, the air filter can be used to detect the air filter. To remind maintenance personnel to check whether the air filter is blocked, so that the air filter can be cleaned and replaced.
由于多数电子设备散热***风压小， 防尘网堵塞后形变很小。 利用形变检测方法对检 测开关的灵敏度要求较高， 容易受外界影响而导致误检测。 另外， 由于该方案不适用于强 度较高、 面积较小的防尘网和防尘网有加固栅格等情况， 使得其适用范围受到了限制。 发明内容  Since the air pressure of most electronic equipment cooling systems is small, the deformation of the air filter is small after being blocked. The deformation detection method requires high sensitivity to the detection switch, and is easily affected by external influences, resulting in false detection. In addition, since the scheme is not applicable to the case where the air filter and the air filter having a relatively high strength and a small area have a reinforcing grid, the scope of application thereof is limited. Summary of the invention
本发明的实施例提供了一种防尘网堵塞程度检测装置、 方法及电子设备， 可适应各种 不同的环境， 以检测防尘网堵塞程度的问题。  Embodiments of the present invention provide a device, a method, and an electronic device for detecting a degree of clogging of a dustproof net, which can be adapted to various environments to detect the degree of clogging of the air filter.
本发明的实施例提供了一种防尘网堵塞程度检测装置，所述装置包括： 风速检测单元、 数据转换模块和堵塞检测单元，  An embodiment of the present invention provides a dust net clogging degree detecting device, the device comprising: a wind speed detecting unit, a data conversion module, and a clogging detecting unit,
所述风速检测单元， 设置在气流通道内， 用于获得模拟风速信号， 并将所述模拟风速 信号提供给所述数据转换模块；  The wind speed detecting unit is disposed in the air flow channel, configured to obtain a simulated wind speed signal, and provide the simulated wind speed signal to the data conversion module;
所述数据转换模块， 与所述风速检测单元相连， 用于将所述模拟风速信号转化为数字 风速信号， 并将所述数字风速信号提供给所述堵塞检测单元；  The data conversion module is connected to the wind speed detecting unit, configured to convert the simulated wind speed signal into a digital wind speed signal, and provide the digital wind speed signal to the jam detecting unit;
所述堵塞检测单元， 与所述数据转换模块相连， 根据所述数字风速信号和风扇的转速 获得风阻特征参数， 根据所述风阻特征参数和告警阈值确定防尘网的堵塞程度。 The jam detecting unit is connected to the data conversion module according to the digital wind speed signal and the speed of the fan The wind resistance characteristic parameter is obtained, and the clogging degree of the air filter is determined according to the wind resistance characteristic parameter and the alarm threshold.
本发明的实施例还提供了一种电子设备， 所述电子设备中设有单板、 风扇， 并于所述 电子设备上开设有入风口、 出风口， 所述风扇用于产生气流， 并使所述气流从入风口流入， 从出风口流出， 形成气流通道， 并于所述入风口设有防尘网， 所述电子设备包括防尘网堵 塞程度检测装置， 所述装置包括： 风速检测单元、 数据转换模块和堵塞检测单元， 其中： 所述风速检测单元， 设置在气流通道内， 用于获得模拟风速信号， 并将所述模拟风速 信号提供给所述数据转换模块；  An embodiment of the present invention further provides an electronic device, wherein the electronic device is provided with a single board and a fan, and the air inlet and the air outlet are opened on the electronic device, and the fan is used to generate airflow, and The airflow flows in from the air inlet, flows out from the air outlet, forms an air flow passage, and is provided with a dustproof net at the air inlet. The electronic device includes a dust net clogging degree detecting device, and the device includes: a wind speed detecting unit a data conversion module and a jam detection unit, wherein: the wind speed detecting unit is disposed in the air flow channel for obtaining a simulated wind speed signal, and providing the simulated wind speed signal to the data conversion module;
所述数据转换模块， 与所述风速检测单元相连， 用于将所述模拟风速信号转化为数字 风速信号， 并将所述数字风速信号提供给所述堵塞检测单元；  The data conversion module is connected to the wind speed detecting unit, configured to convert the simulated wind speed signal into a digital wind speed signal, and provide the digital wind speed signal to the jam detecting unit;
所述堵塞检测单元， 与所述数据转换模块相连， 根据所述数字风速信号和风扇的转速 获得风阻特征参数， 根据所述风阻特征参数和告警阈值确定防尘网的堵塞程度。  The clogging detecting unit is connected to the data conversion module, and obtains a wind resistance characteristic parameter according to the digital wind speed signal and a rotation speed of the fan, and determines a clogging degree of the air filter according to the wind resistance characteristic parameter and the alarm threshold.
本发明的实施例还提供了一种防尘网堵塞程度检测方法， 包括：  The embodiment of the invention further provides a method for detecting the degree of clogging of the air filter, comprising:
采集风扇的转速、 以及所述转速下的风速参数；  Collecting the speed of the fan and the wind speed parameter at the speed;
根据风扇的转速、 以及所述转速下的风速参数获得风阻特征参数；  Obtaining a wind resistance characteristic parameter according to a rotation speed of the fan and a wind speed parameter at the rotation speed;
根据所述风阻特征参数和告警阈值确定防尘网的堵塞程度。  Determining the degree of clogging of the air filter according to the wind resistance characteristic parameter and the alarm threshold.
本发明的实施例通过检测透过防尘网的风速来检测防尘网的堵塞程度， 可适应各种环 境、 及各种不同的防尘网， 不依赖缺省配置或者人为经验， 而是直接根据 ώ风速确定的防 尘网堵塞程度进行告警， 以通知用户定时去清理或更换防尘网， 从而确保了电子设备的散 热性能， 保证了电子设备的运行稳定性。 附图说明  The embodiment of the present invention detects the clogging degree of the air filter by detecting the wind speed of the air filter, and can adapt to various environments and various air filters, without relying on default configuration or human experience, but directly The alarm is generated according to the degree of clogging of the air filter determined by the hurricane speed to notify the user to periodically clean or replace the air filter, thereby ensuring the heat dissipation performance of the electronic device and ensuring the operational stability of the electronic device. DRAWINGS
图 1示出了现有技术的防尘网堵塞程度的检测装置的结构图；  1 is a structural view showing a detecting device for the degree of clogging of a dust filter in the prior art;
图 2示出了本发明实施例一的带有防尘网堵塞程度检测装置的电子设备的结构图； 图 3示出了本发明实施例一中防尘网堵塞程度检测装置的结构图；  2 is a structural view of an electronic device with a dust net clogging degree detecting device according to Embodiment 1 of the present invention; FIG. 3 is a structural view showing a dust net clogging degree detecting device according to Embodiment 1 of the present invention;
图 4示出了本发明实施例二的防尘网堵塞程度检测方法的流程；  4 is a flowchart showing a method for detecting a degree of clogging of a dustproof net according to Embodiment 2 of the present invention;
图 5示出了本发明实施例二的获得初始风阻特征参数的流程；  FIG. 5 is a flowchart of obtaining an initial wind resistance characteristic parameter according to Embodiment 2 of the present invention; FIG.
图 6为本发明实施例二的获得当前风阻特征参数的流程。  FIG. 6 is a flowchart of obtaining current wind resistance characteristic parameters according to Embodiment 2 of the present invention.
具体实施方式 detailed description
为了便于本领域一般技术人员理解和实现本发明， 现结合附图描绘本发明的实施例。 由于防尘网堵塞后造成的直接影响是气流通道内的风速减小， 所以可通过检测气流通 道内的风速来检测防尘网堵塞程度。 将检测到的风速与防尘网洁净时的风速进行比较， 风 速减小越大表明防尘网堵塞越严重。 In order to facilitate a person skilled in the art to understand and implement the invention, embodiments of the invention are now described in conjunction with the drawings. Since the direct effect caused by the clogging of the air filter is that the wind speed in the air flow channel is reduced, the air flow can be detected. The wind speed in the road is used to detect the degree of clogging of the air filter. The detected wind speed is compared with the wind speed when the air filter is clean. The larger the wind speed decreases, the more serious the air filter is blocked.
本发明实施例通过检测气流通道内的风速变化情况来检测防尘网堵塞程度。 并根据电 子设备中应用环境变化 （如硬件配置的变化） 随时改变检测标准， 从而使本发明实施例可 适应于电子设备的各种应用环境。 下面通过具体的实施例来描述本发明的防尘网堵塞程度 的检测技术， 其中， 实施例一描述了防尘网堵塞程度的检测装置， 实施例二描述了防尘网 堵塞程度的检测方法， 实施例三描述了带有防尘网堵塞程度的检测装置的电子设备。  In the embodiment of the invention, the degree of clogging of the air filter is detected by detecting the change of the wind speed in the air flow channel. The detection criteria are changed at any time according to changes in the application environment (such as changes in hardware configuration) in the electronic device, so that the embodiments of the present invention can be adapted to various application environments of the electronic device. The following describes a method for detecting the degree of clogging of the air filter according to the specific embodiment. The first embodiment describes a device for detecting the degree of clogging of the air filter, and the second embodiment describes a method for detecting the degree of clogging of the air filter. Embodiment 3 describes an electronic device having a detecting device for the degree of clogging of the air filter.
实施例一  Embodiment 1
本实施例的防尘网堵塞程度检测装置应用于电子设备中。 下面对该防尘网堵塞程度检 测装置进行详细阐述。  The dust net clogging degree detecting device of this embodiment is applied to an electronic device. Next, the dust clogging degree detecting device will be described in detail.
请参阅图 2， 图 2为带有防尘网堵塞程度检测装置的电子设备。 所述电子设备中设有单 板 （图中未示出） 、 风扇 4， 并于所述电子设备上开设有入风口 8、 出风口 7， 所述风扇 4用 于产生气流， 并使该气流从入风口 8流入， 从出风口 7流出， 从而形成气流通道 11， 给所述 单板散热。 其中， 在该入风口 8处设有防尘网 3， 以阻挡灰尘进入该电子设备中。 更进一步， 该风扇 4安装在风扇框 10上， 该入风口 8、 出风口 7开设在电子设备的机柜 9上。 该风扇 4设于 气流通道内。 该单板设置在机柜 9中， 当气流通过气流通道 11时， 可对电子设备的单板配置 进行散热， 保证电子设备的稳定运行。  Please refer to Figure 2, Figure 2 is an electronic device with a dust net clogging degree detecting device. The electronic device is provided with a single board (not shown), a fan 4, and an air inlet 8 and an air outlet 7 are formed on the electronic device, and the fan 4 is configured to generate an air flow and make the air flow. It flows in from the air inlet 8 and flows out from the air outlet 7, thereby forming an air flow passage 11 to dissipate heat to the single board. An air filter 3 is disposed at the air inlet 8 to block dust from entering the electronic device. Further, the fan 4 is mounted on the fan frame 10, and the air inlet 8 and the air outlet 7 are opened on the cabinet 9 of the electronic device. The fan 4 is disposed in the air flow passage. The board is disposed in the cabinet 9. When the airflow passes through the airflow channel 11, the board configuration of the electronic device can be dissipated to ensure stable operation of the electronic device.
该防尘网堵塞程度检测装置安装在电子设备中， 是基于上述电子设备应用该防尘网堵 塞程度检测装置。 其中， 该防尘网堵塞程度检测装置包括：  The air filter clogging degree detecting device is mounted in the electronic device, and is based on the electronic device applying the dust clogging degree detecting device. The air filter clogging degree detecting device includes:
风速检测单元 2， 设置在气流通道内， 用于获得模拟风速信号， 并将该模拟风速信号提 供给该数据转换模块 303 ;  The wind speed detecting unit 2 is disposed in the air flow channel for obtaining the simulated wind speed signal, and the analog wind speed signal is supplied to the data conversion module 303;
数据转换模块 303， 与该风速检测单元 2相连， 用于将该模拟风速信号转化为数字风速 信号， 并将该数字风速信号提供给堵塞检测单元 1 ;  a data conversion module 303, coupled to the wind speed detecting unit 2, for converting the simulated wind speed signal into a digital wind speed signal, and providing the digital wind speed signal to the jam detecting unit 1;
堵塞检测单元 1， 与该数据转换模块 303相连， 根据该数字风速信号和风扇的转速获得 风阻特征参数， 根据该风阻特征参数和告警阈值确定防尘网的堵塞程度。  The clogging detecting unit 1 is connected to the data conversion module 303, and obtains a wind resistance characteristic parameter according to the digital wind speed signal and the rotation speed of the fan, and determines the clogging degree of the air filter according to the wind resistance characteristic parameter and the alarm threshold.
请一并参阅图 2、 图 3， 对该防尘网堵塞程度检测装置进行详细阐述：  Please refer to Figure 2 and Figure 3 for a detailed description of the air filter clogging degree detection device:
该防尘网堵塞程度检测装置包括风速检测单元 2、 数据转换模块 303和堵塞检测单元 1。 该风速检测单元 2， 设置在防尘网 3的内侧， 气流通道 11内， 用于将穿过防尘网 3的风速 转换成模拟风速信号 （如电压、 电流信号等） ， 并将该模拟风速信号提供给数据转换模块 303；  The air filter clogging degree detecting device includes a wind speed detecting unit 2, a data converting module 303, and a clogging detecting unit 1. The wind speed detecting unit 2 is disposed inside the air filter 3, and is configured to convert the wind speed passing through the air filter 3 into a simulated wind speed signal (such as a voltage, a current signal, etc.) and simulate the wind speed. The signal is provided to the data conversion module 303;
该数据转换模块 303， 与该风速检测单元 2相连， 用于将该模拟风速信号转化为数字风 速信号， 并将该数字风速信号提供给堵塞检测单元 1 ; The data conversion module 303 is connected to the wind speed detecting unit 2 for converting the simulated wind speed signal into a digital wind a speed signal, and the digital wind speed signal is provided to the jam detecting unit 1;
该堵塞检测单元 1， 与该数据转换模块 303相连， 根据该数字风速信号和风扇的转速获 得风阻特征参数， 根据该风阻特征参数和告警阈值确定防尘网的堵塞程度。  The clogging detecting unit 1 is connected to the data conversion module 303, and obtains a wind resistance characteristic parameter according to the digital wind speed signal and the rotational speed of the fan, and determines the clogging degree of the air filter according to the wind resistance characteristic parameter and the alarm threshold.
其中， 该堵塞检测单元 1包括： 处理模块 304和存储器 305。  The jam detection unit 1 includes: a processing module 304 and a memory 305.
该处理模块 304， 与该数据转换模块 303相连， 根据数字风速信号和风扇的转速获得风 阻特征参数 （获得方法参见实施例二） ， 根据所述风阻特征参数和告警阈值确定防尘网的 堵塞程度 （确定方法参见实施例二） ；  The processing module 304 is connected to the data conversion module 303, and obtains a wind resistance characteristic parameter according to the digital wind speed signal and the rotational speed of the fan (see the second embodiment for obtaining the method), and determines the clogging degree of the air filter according to the wind resistance characteristic parameter and the alarm threshold. (For the determination method, see Example 2);
该存储器 305， 用于存储初始风阻特征参数、 初始风速、 风扇转速以及告警阈值等。 其中， 该告警阈值可由初始风阻特征参数确定、 或者预先根据经验设定， 优选的， 告 警阈值由初始风阻特征参数确定。 该告警阈值可存储在存储器 305中， 该初始风阻特征参数 可根据初始风速、 风扇转速等确定。  The memory 305 is configured to store initial wind resistance characteristic parameters, initial wind speed, fan speed, and alarm threshold. The alarm threshold may be determined by an initial wind resistance characteristic parameter or set according to experience in advance. Preferably, the alarm threshold is determined by an initial wind resistance characteristic parameter. The alarm threshold may be stored in the memory 305, and the initial wind resistance characteristic parameter may be determined according to an initial wind speed, a fan speed, or the like.
更进一步，该防尘网堵塞程度检测装置还包括风扇控制单元 301， 与电子设备中的风扇 和该堵塞检测单元 1的处理模块相连， 用于控制该风扇 4的转速， 并将该风扇 4的转速信息提 供给该堵塞检测单元 1。  Further, the air filter clogging degree detecting device further includes a fan control unit 301 connected to the fan in the electronic device and the processing module of the clogging detecting unit 1 for controlling the rotation speed of the fan 4, and the fan 4 is The rotation speed information is supplied to the clogging detecting unit 1.
其中， 该数据转换模块 303、 该堵塞检测单元 1和该风扇控制单元 301可以集成于一体。 该风速检测单元 2和该数据转换模块 303可以集成于一体， 如数字风速传感器， 此时， 可以 直接获得数字风速信号， 然后， 通过该数字风速传感器将该数字风速信号提供给该堵塞检 测单元 1， 从而根据该数字风速信号和风扇 4的转速获得风阻特征参数， 根据该风阻特征参 数和告警阈值就可确定防尘网的堵塞程度。  The data conversion module 303, the jam detection unit 1 and the fan control unit 301 can be integrated. The wind speed detecting unit 2 and the data conversion module 303 can be integrated into one body, such as a digital wind speed sensor. At this time, the digital wind speed signal can be directly obtained, and then the digital wind speed signal is supplied to the jam detecting unit 1 through the digital wind speed sensor. Therefore, the wind resistance characteristic parameter is obtained according to the digital wind speed signal and the rotation speed of the fan 4, and the degree of clogging of the air filter can be determined according to the wind resistance characteristic parameter and the alarm threshold.
该防尘网堵塞程度检测装置还可包括信号处理装置 302。 其中， 该信号处理装置 302设 置与风速检测单元 2相连， 用于对该风速检测单元 2输出的风速信号进行处理 （如滤波和 /或 放大），主要作用是提高信号的质量和传输能力，然后将处理信号发给数据转换模块 303 (风 速检测单元 2与数据转换模块 303分设情况） 或堵塞检测单元 1 (在风速检测单元 2与数据转 换模块 303集成为一体情） ， 这样， 当风速检测单元 2所检测到的模拟风速信号质量差时， 堵塞检测单元仍然可获得质量较好的信号， 以便后续处理。  The dust screen clogging degree detecting means may further include a signal processing means 302. The signal processing device 302 is provided to be connected to the wind speed detecting unit 2 for processing (such as filtering and/or amplifying) the wind speed signal output by the wind speed detecting unit 2, and the main function is to improve signal quality and transmission capability, and then The processing signal is sent to the data conversion module 303 (the wind speed detecting unit 2 and the data conversion module 303 are separated) or the jam detecting unit 1 (integrated with the wind speed detecting unit 2 and the data conversion module 303), so that when the wind speed detecting unit 2 When the detected simulated wind speed signal is of poor quality, the jam detection unit can still obtain a better quality signal for subsequent processing.
该防尘网堵塞程度检测装置还包括告警模块 306， 与该堵塞检测单元 1相连， 用于以声 光等方式进行告警， 以表示防尘网堵塞。  The air filter clogging degree detecting device further includes an alarm module 306, and is connected to the clogging detecting unit 1 for alarming by sound and light to indicate that the air filter is blocked.
请参阅图 2，该堵塞检测单元 1可通过告警电缆 5连接网管或上位机 6。该网管或上位机 6 用于接收堵塞检测单元 1发送的告警信号， 以通知远端用户及时采取措施， 如清洗防尘网、 或更换防尘网等， 从而保证电子设备的散热性能， 使电子设备稳定运行。 实施例二 Referring to FIG. 2, the jam detecting unit 1 can be connected to the network tube or the host computer 6 through the alarm cable 5. The network management unit or the upper computer 6 is configured to receive an alarm signal sent by the congestion detection unit 1 to notify the remote user to take timely measures, such as cleaning the air filter or replacing the air filter, thereby ensuring the heat dissipation performance of the electronic device and enabling the electronic device. The device runs stably. Embodiment 2
本实施例描述防尘网堵塞程度检测方法， 包括： 采集风扇的转速、 以及所述转速下的 风速参数； 根据风扇的转速、 以及所述转速下的风速参数获得风阻特征参数； 根据当前风 阻特征参数和告警阈值确定防尘网的堵塞程度。 该风速参数可以为数字风速信号。  The method for detecting the degree of clogging of the air filter includes: collecting the rotation speed of the fan and the wind speed parameter at the rotation speed; obtaining the wind resistance characteristic parameter according to the rotation speed of the fan and the wind speed parameter at the rotation speed; according to the current wind resistance characteristic The parameters and alarm thresholds determine the degree of clogging of the air filter. The wind speed parameter can be a digital wind speed signal.
下面参考图 4，对该防尘网堵塞程度检测方法进行详细描述。所述检测方法包括以下步 骤：  The method for detecting the degree of clogging of the air filter will be described in detail below with reference to FIG. The detection method includes the following steps:
步骤 41、 防尘网堵塞检测装置上电、 ***配置；  Step 41: The air filter blocking detection device is powered on and the system is configured;
步骤 42、进行***初始特征参数采集， 并计算***初始风阻特征参数 K1和告警阈值 X； 步骤 43、 判断定时检测条件是否为真， 如果是， 执行步骤 44， 否则， 重复本步骤； 所 述定时检测条件可以为预定时间间隔， 如每隔一天， 或者是每天的某个时刻， 如每天的 23 点；  Step 42: Perform initial feature parameter collection of the system, and calculate a system initial wind resistance characteristic parameter K1 and an alarm threshold X. Step 43: Determine whether the timing detection condition is true, and if yes, perform step 44, otherwise, repeat this step; The detection condition may be a predetermined time interval, such as every other day, or a certain time of day, such as 23 o'clock every day;
步骤 44、 ***进行防尘网堵塞程度的检测， 得到当前的***风阻特征参数 K2;  Step 44: The system performs the detection of the degree of clogging of the air filter, and obtains the current system wind resistance characteristic parameter K2;
步骤 45， 判断当前风阻特征参数 K2是否大于告警阈值 X， 若是， 说明防尘网堵塞程度 比较严重， 执行步骤 46; 否则， 返回步骤 43。  Step 45: Determine whether the current windage characteristic parameter K2 is greater than the alarm threshold X. If yes, it indicates that the air filter is more severely blocked, and step 46 is performed; otherwise, return to step 43.
步骤 46、 发出告警， 或者通知用户， 以及时清洗防尘。  Step 46: Send an alarm or notify the user to clean the dust.
下面详细描述上述步骤：  The above steps are described in detail below:
因电子设备的硬件配置呈多样性的特点， 同一电子设备在不用的应用场景中硬件配置 差异很大， 故***风阻差异也很大； 另外， 由于多数电子设备为了改善散热性能而采用转 速可调的风扇， 可通过风扇闭环调速和预定算法对风速变化情况进行判断和处理， 以实现 对防尘网的堵塞程度进行检测和告警。  Due to the diversity of the hardware configuration of the electronic device, the hardware configuration of the same electronic device varies greatly in the unused application scenarios, so the system has a large difference in wind resistance; in addition, since most electronic devices are adjustable in speed for improving heat dissipation performance The fan can be judged and processed by the fan closed-loop speed regulation and a predetermined algorithm to detect and alarm the degree of clogging of the air filter.
为了获得较准确的告警阈值， 在步骤 42中， 需要采集***初始特征参数， 并计算*** 初始风阻特征参数， 然后计算由初始风阻特征参数确定的告警阈值。  In order to obtain a more accurate alarm threshold, in step 42, the initial feature parameters of the system need to be collected, and the initial wind resistance characteristic parameter of the system is calculated, and then the alarm threshold determined by the initial wind resistance characteristic parameter is calculated.
***初始特征参数是在防尘网清洁的条件下，如***初次上电、修改/***硬件配置、 或防尘网更新时， 由处理模块 304下发控制信号， 通过调整风扇 4的转速， 并读取风扇的转 速值。 然后通过风速检测单元收集在各转速下对应的数字风速信号， 再根据预定算法取得 ***初始风阻特征参数 Kl， 并由***初始风阻特征参数 K1确定告警阈值， 将告警阈值存储 到存储器 305中。 告警阈值也可为预设的某个经验值。 如图 5所示， 下面描述步骤 42中所述 计算***初始风阻特征参数 K1和由***初始风阻特征参数 K1确定的告警阈值的方法。  The initial characteristic parameter of the system is that under the condition that the air filter is cleaned, such as the initial power-on of the system, the modification/system hardware configuration, or the air filter update, the processing module 304 sends a control signal, by adjusting the rotation speed of the fan 4, and Read the fan speed value. Then, the digital wind speed signal corresponding to each speed is collected by the wind speed detecting unit, and the initial wind resistance characteristic parameter K1 of the system is obtained according to a predetermined algorithm, and the alarm threshold is determined by the initial wind resistance characteristic parameter K1 of the system, and the alarm threshold is stored in the memory 305. The alarm threshold can also be a preset empirical value. As shown in Fig. 5, the method of calculating the initial wind resistance characteristic parameter K1 of the system and the alarm threshold determined by the initial wind resistance characteristic parameter K1 of the system will be described below.
步骤 501、 由处理模块将风扇转速调节到某一特定转速点；  Step 501, the fan speed is adjusted by the processing module to a specific speed point;
步骤 502、 延时， 直至风扇转速恒定；  Step 502, delay, until the fan speed is constant;
步骤 503、 采集风速信号， 可得到风扇转速 RPM1和对应的风速信号 VI； 步骤 504、 判断是否所有转速点的风速都采集完成， 如果是， 执行步骤 505， 否则， 返 步骤 501， 直到所有转速点下的风速信号都采集完成为止； Step 503, collecting a wind speed signal, the fan speed RPM1 and the corresponding wind speed signal VI are obtained; Step 504: Determine whether the wind speeds of all the speed points are collected. If yes, go to step 505. Otherwise, go back to step 501 until the wind speed signals are collected at all speed points.
步骤 505、 计算初始风阻特征参数 Kl。  Step 505: Calculate an initial wind resistance characteristic parameter K1.
当所有转速点的风速都采集完成时， 可得到一组风扇转速和对应的风速信号的数据： [RPM1,V1] , [RPM2,V2] , [RPM3,V3] ...... [ RPMn,Vn]。 已知风速信号 V、 风压 P与风阻 R之间 满足以下公式：  When the wind speeds of all the speed points are collected, the data of a set of fan speeds and corresponding wind speed signals can be obtained: [RPM1, V1], [RPM2, V2], [RPM3, V3] ...... [RPMn , Vn]. It is known that the wind speed signal V, the wind pressure P and the wind resistance R satisfy the following formula:
p  p
V = - ( 1 )  V = - ( 1 )
R  R
因风压 P与风扇的转速 RPM基本成正比关系：  Because the wind pressure P is proportional to the fan speed RPM:
P = RPMx A (2)  P = RPMx A (2)
注： A为常量。 故：  Note: A is a constant. Therefore:
T, RPMx A A ， ， λ T , RPMx AA , , λ
V = =— x RPM ( 3 )  V = =— x RPM ( 3 )
R R  R R
由公式 （3 ) 可知， 对于风阻恒定的***， 风速信号和风扇转速成正比。  According to formula (3), for a system with constant wind resistance, the wind speed signal is proportional to the fan speed.
公式可表示为：  The formula can be expressed as:
R RPM  R RPM
(4)  (4)
A V 可将 作为风阻特征参数 Kl。 当在相同的转速下， 当防尘网清洁时 （即 最小时） ， A V can be used as the wind resistance characteristic parameter Kl. When at the same speed, when the air filter is clean (ie the smallest),
A A 风速最大； 当防尘网上因灰尘沉积而堵塞时 （即 变大时） ， 会导致风速降低； 当防尘网 A A wind speed is the highest; when the dust net is clogged due to dust deposition (ie, when it becomes larger), the wind speed will decrease;
A 堵塞程度越严重 （即 非常大时， 如超过告警阈值时） ， 风速降低的程度越大； 当防尘网  A The more severe the blockage (ie, when it is very large, such as when the alarm threshold is exceeded), the greater the degree of wind speed reduction;
A 完全堵塞 （即 无穷大时） ， 风速为 0。 在本发明实施例中， 为了获得较准确的 ^， 对所获  A is completely blocked (ie, when infinite) and the wind speed is zero. In the embodiment of the present invention, in order to obtain a more accurate ^, the obtained
A A  A A
得的每一组风速信号和风扇转速， 以风速信号作为纵坐标， 以风扇转速作为横坐标， 在平 面直角坐标系上绘制成一个点， 这样， 可在坐标系中绘制多个点， 然后对这些点进行拟合 成一条直线， 这条直线的斜率即为初始风阻特征参数 Kl。 应该注意到， 也可以仅测特定转速点的风速， 这时可得到一组风扇转速和对应的风速 信号的数据， 然后根据公式 4直接获得初风阻特征参数 K1 : For each set of wind speed signal and fan speed, take the wind speed signal as the ordinate and the fan speed as the abscissa, draw a point on the plane rectangular coordinate system, so that multiple points can be drawn in the coordinate system, and then These points are fitted into a straight line, and the slope of this line is the initial wind resistance characteristic parameter Kl. It should be noted that it is also possible to measure only the wind speed at a specific speed point. At this time, a set of fan speed and corresponding wind speed signal data can be obtained, and then the initial wind resistance characteristic parameter K1 is directly obtained according to formula 4:
步骤 506、 计算根据初始风阻特征参数 K1和***的初始风阻特征参数 K1确定告警阈值 X， X值的范围为 K1的 100%〜200 %。  Step 506: Calculate an alarm threshold X according to the initial wind resistance characteristic parameter K1 and the initial wind resistance characteristic parameter K1 of the system, and the X value ranges from 100% to 200% of K1.
在步骤 44中， ***进行防尘网堵塞的检测， 以得到当前的***风阻特征参数 Κ2。 在系 统运行过程中， 定时执行以下检测操作， 获取***当前的风阻特征参数： 由处理模块 304下 发控制信号， 来调整风扇 4的转速并读取风扇的转速值。 然后通过信号处理装置 302和数据 转换模块 303收集在各转速下对应的数字风速信号， 再根据处理模块 304中预定算法取得系 统的风阻特征参数 K2。 如图 6所示， 下面描述获得当前***风阻特征参数 Κ2的方法。 In step 44, the system performs detection of air filter clogging to obtain the current system wind resistance characteristic parameter Κ2. Department During the system operation, the following detection operations are performed periodically to obtain the current wind resistance characteristic parameter of the system: The processing module 304 issues a control signal to adjust the rotation speed of the fan 4 and read the rotation speed value of the fan. Then, the digital wind speed signal corresponding to each speed is collected by the signal processing device 302 and the data conversion module 303, and the wind resistance characteristic parameter K2 of the system is obtained according to a predetermined algorithm in the processing module 304. As shown in Fig. 6, a method of obtaining the current system wind resistance characteristic parameter Κ2 will be described below.
步骤 601、 开始；  Step 601, start;
步骤 602、 由处理模块将风扇转速调节到某一转速点；  Step 602: The processing module adjusts the fan speed to a certain speed point;
步骤 603、 稳定一段时间， 直至风扇转速恒定；  Step 603: Stabilize for a period of time until the fan speed is constant;
步骤 604、 采集风速信号。 由此得到风扇转速 RPMD1和对应的风速信号 VD1 ;  Step 604: Collect a wind speed signal. Thereby obtaining the fan speed RPMD1 and the corresponding wind speed signal VD1;
步骤 605、 判断是否所有转速点的风速都采集完成， 如果是， 执行步骤 606， 否则， 返 回步骤 602， 直到所有转速点下的风速信号都采集完成；  Step 605: Determine whether the wind speeds of all the speed points are collected. If yes, go to step 606. Otherwise, go back to step 602 until the wind speed signals are collected at all speed points.
步骤 606、当所有转速点的风速都采集完成时，可得到一组风扇转速和对应的风速信号 的数据： [RPMD1,VD1]， [RPMD2,VD2] , [RPMD3,VD3] ...... [ RPMDn,VDn]。 这时可根据步 骤 505中描述的方法获得风阻特征参数 K2。这时返回步骤 45，使风阻特征参数 Κ2与告警阈值 X进行比较， 判断防尘网是否堵塞。 如果超出告警阈值， 表明防尘网有堵塞， ***就会通过 告警模块发出告警； 如果没有告警， ***执行其他操作， 根据定时时间等待下一次检测。  Step 606: When the wind speeds of all the speed points are collected, the data of a set of fan speeds and corresponding wind speed signals can be obtained: [RPMD1, VD1], [RPMD2, VD2], [RPMD3, VD3] ..... [RPMDn, VDn]. At this time, the wind resistance characteristic parameter K2 can be obtained according to the method described in the step 505. At this time, returning to step 45, the wind resistance characteristic parameter Κ2 is compared with the alarm threshold X to determine whether the air filter is clogged. If the alarm threshold is exceeded, the air filter is blocked, and the system sends an alarm through the alarm module. If there is no alarm, the system performs other operations and waits for the next detection according to the time.
实施例三  Embodiment 3
一种电子设备， 如图 2所示， 该电子设备中设有单板 （图中未给出） 、 风扇 4， 并于该 该电子设备上开设有入风口 8、 出风口 7， 该风扇 4用于产生气流， 并使该气流从入风口 8流 入， 从出风口 7流出， 形成气流通道 11， 给该单板散热， 并于该入风口 8设有防尘网 3， 其中， 该电子设备包括防尘网堵塞程度检测装置， 如图 3所示， 该该装置包括： 风速检测单元 2、 数据转换模块 303和堵塞检测单元 1， 其中：  An electronic device, as shown in FIG. 2, is provided with a single board (not shown) and a fan 4, and an air inlet 8 and an air outlet 7 are opened on the electronic device, and the fan 4 is provided. The airflow is generated, and the airflow flows from the air inlet 8 and flows out from the air outlet 7 to form an air flow passage 11 to dissipate heat to the single board. The air inlet 8 is provided with a dustproof net 3, wherein the electronic device The device includes a dust filter clogging degree detecting device. As shown in FIG. 3, the device includes: a wind speed detecting unit 2, a data conversion module 303, and a clogging detecting unit 1, wherein:
该风速检测单元 2， 设置在气流通道 11内， 用于获得模拟风速信号， 并将该模拟风速信 号提供给该数据转换模块 303 ;  The wind speed detecting unit 2 is disposed in the air flow channel 11 for obtaining a simulated wind speed signal, and the analog wind speed signal is provided to the data conversion module 303;
该数据转换模块 303， 与该风速检测单元 2相连， 用于将该模拟风速信号转化为数字风 速信号， 并将该数字风速信号提供给该堵塞检测单元 1 ;  The data conversion module 303 is connected to the wind speed detecting unit 2 for converting the simulated wind speed signal into a digital wind speed signal, and providing the digital wind speed signal to the jam detecting unit 1;
该堵塞检测单元 1， 与该数据转换模块 303相连，根据该数字风速信号和风扇 4的转速获 得风阻特征参数， 根据该风阻特征参数和告警阈值确定防尘网的堵塞程度。  The clogging detecting unit 1 is connected to the data conversion module 303, and obtains a wind resistance characteristic parameter according to the digital wind speed signal and the rotation speed of the fan 4, and determines the clogging degree of the air filter according to the wind resistance characteristic parameter and the alarm threshold.
该防尘网堵塞程度检测装置还包括： 风扇控制单元 301， 与风扇 4和该堵塞检测单元 1 相连， 用于控制该风扇 4的转速， 并将该风扇的转速信息提供给该堵塞检测单元 1。 该数据 转换模块 303、 该堵塞检测单元 1和该风扇 4控制单元集成于一体。 该风速检测单元 1和该数 据转换模块 303集成于一体。 本发明上述实施例描述了风扇 4为可调转速的情况， 上述实施例同样可适合风扇 4为固 定转速的情况， 这时， 堵塞检测单元 1可直接根据该数字风速信号获得风阻特征参数， 然后 根据当前风阻特征参数和告警阈值确定防尘网的堵塞程度。 告警阈值的确定方法与上面描 述的方法相同， 即由初始风阻特征参数确定、 或者预先根据经验设定。 The air filter clogging degree detecting device further includes: a fan control unit 301 connected to the fan 4 and the clogging detecting unit 1 for controlling the rotation speed of the fan 4, and providing the rotation speed information of the fan to the clogging detecting unit 1 . The data conversion module 303, the jam detection unit 1 and the fan 4 control unit are integrated. The wind speed detecting unit 1 and the data conversion module 303 are integrated. The above embodiment of the present invention describes the case where the fan 4 is of an adjustable rotational speed. The above embodiment is also applicable to the case where the fan 4 is at a fixed rotational speed. At this time, the occlusion detecting unit 1 can directly obtain the wind resistance characteristic parameter according to the digital wind speed signal, and then The degree of clogging of the air filter is determined according to the current wind resistance characteristic parameter and the alarm threshold. The method for determining the alarm threshold is the same as the method described above, that is, determined by the initial wind resistance characteristic parameter, or set in advance according to experience.
本发明实施例通过风速检测来监控防尘网堵塞程度， 可以应用于复杂的通讯设备应用 环境中， 告警准确及时。 屏蔽了风扇个体差异 （如风扇转速的变化或老化） 带来的影响。  The embodiment of the invention monitors the degree of clogging of the air filter by using the wind speed detection, and can be applied to a complex communication device application environment, and the alarm is accurate and timely. It shields the effects of individual fan differences (such as changes in fan speed or aging).
虽然通过实施例描绘了本发明， 但本领域普通技术人员知道， 在不脱离本发明的精神 和实质的情况下， 就可使本发明有许多变形和变化， 本发明的范围由所附的权利要求来限 定。  While the invention has been described by the embodiments of the invention in the embodiments of the invention Request to limit.

Claims

权 利 要 求 书 Claim
1、 一种防尘网堵塞程度检测装置， 其特征在于， 所述装置包括： 风速检测单元 （2) 、 数据转换模块 （303 ) 和堵塞检测单元 （1 ) ，  A device for detecting the degree of clogging of a dust filter, characterized in that: the device comprises: a wind speed detecting unit (2), a data conversion module (303) and a jam detecting unit (1),
所述风速检测单元（2) ， 设置在气流通道内， 用于获得模拟风速信号， 并将所述模拟 风速信号提供给所述数据转换模块 （303 ) ；  The wind speed detecting unit (2) is disposed in the airflow channel for obtaining a simulated wind speed signal, and providing the simulated wind speed signal to the data conversion module (303);
所述数据转换模块 （303 ) ， 与所述风速检测单元 （2) 相连， 用于将所述模拟风速信 号转化为数字风速信号， 并将所述数字风速信号提供给所述堵塞检测单元 （1 ) ；  The data conversion module (303) is connected to the wind speed detecting unit (2) for converting the simulated wind speed signal into a digital wind speed signal, and providing the digital wind speed signal to the jam detecting unit (1) ) ;
所述堵塞检测单元 （1 ) ， 与所述数据转换模块 （303 ) 相连， 根据所述数字风速信号 和风扇的转速获得风阻特征参数， 根据所述风阻特征参数和告警阈值确定防尘网的堵塞程 度。  The clogging detecting unit (1) is connected to the data conversion module (303), and obtains a wind resistance characteristic parameter according to the digital wind speed signal and the rotation speed of the fan, and determines the clogging of the air filter according to the wind resistance characteristic parameter and the alarm threshold. degree.
2、 根据权利要求 1所述的装置， 其特征在于， 所述装置还包括风扇控制单元 （301 ) ， 与风扇 （4) 和所述堵塞检测单元 （2) 相连， 用于控制所述风扇 （4) 的转速， 并将所述风 扇 （4) 的转速信息提供给所述堵塞检测单元 （2) 。  2. Apparatus according to claim 1, characterized in that the apparatus further comprises a fan control unit (301) connected to the fan (4) and the occlusion detecting unit (2) for controlling the fan ( 4) The rotational speed, and the rotational speed information of the fan (4) is supplied to the occlusion detecting unit (2).
3、 根据权利要求 2所述的装置， 其特征在于， 所述数据转换模块（303 ) 、 所述堵塞检 测单元 （1 ) 和所述风扇控制单元 (301)集成于一体。  3. Apparatus according to claim 2, characterized in that said data conversion module (303), said clogging detection unit (1) and said fan control unit (301) are integrated.
4、 根据权利要求 1所述的装置， 其特征在于， 所述风速检测单元（2)和所述数据转换 模块 （303 ) 集成于一体。  4. Apparatus according to claim 1, characterized in that said wind speed detecting unit (2) and said data conversion module (303) are integrated.
5、 根据权利要求 1所述的装置， 其特征在于， 所述装置还包括信号处理装置 （302) ， 与所述风速检测单元 （2 ) 相连， 用于对所述风速检测单元 （2) 输出的模拟风速信号进行 滤波和 /或放大处理。  The device according to claim 1, characterized in that the device further comprises a signal processing device (302) connected to the wind speed detecting unit (2) for outputting the wind speed detecting unit (2) The simulated wind speed signal is filtered and/or amplified.
6、 根据权利要求 1所述的装置， 其特征在于， 所述装置进一步包括：  6. The device according to claim 1, wherein the device further comprises:
告警模块 （306) ， 与所述堵塞检测单元 （1 ) 相连， 用于告警。  The alarm module (306) is connected to the jam detection unit (1) for alarming.
7、 一种电子设备， 所述电子设备中设有单板、 风扇 （4) ， 并于所述电子设备上开设 有入风口 （8 ) 、 出风口 （7) ， 所述风扇 （4) 用于产生气流， 并使所述气流从入风口 （8 ) 流入， 从出风口 （7)流出， 形成气流通道（11 ) ， 并于所述入风口 （8 ) 设有防尘网 （3 ) ， 其特征在于， 所述电子设备包括防尘网堵塞程度检测装置， 所述装置包括： 风速检测单元 (2) 、 数据转换模块 （303 ) 和堵塞检测单元 （1 ) ， 其中：  7. An electronic device, wherein the electronic device is provided with a single board and a fan (4), and the air inlet (8) and the air outlet (7) are opened on the electronic device, and the fan (4) is used. Producing a gas flow, and flowing the airflow from the air inlet (8), flowing out from the air outlet (7), forming an air flow passage (11), and providing a dustproof net (3) at the air inlet (8), The electronic device includes a dust filter clogging degree detecting device, and the device includes: a wind speed detecting unit (2), a data conversion module (303), and a clogging detecting unit (1), wherein:
所述风速检测单元（2) ， 设置在气流通道（11 ) 内， 用于获得模拟风速信号， 并将所 述模拟风速信号提供给所述数据转换模块 （303 ) ；  The wind speed detecting unit (2) is disposed in the airflow channel (11) for obtaining a simulated wind speed signal, and providing the simulated wind speed signal to the data conversion module (303);
所述数据转换模块 （303 ) ， 与所述风速检测单元 （2) 相连， 用于将所述模拟风速信 号转化为数字风速信号， 并将所述数字风速信号提供给所述堵塞检测单元 （1 ) ； 所述堵塞检测单元 （1 ) ， 与所述数据转换模块 （303 ) 相连， 根据所述数字风速信号 和风扇的转速获得风阻特征参数， 根据所述风阻特征参数和告警阈值确定防尘网的堵塞程 度。 The data conversion module (303) is connected to the wind speed detecting unit (2) for converting the simulated wind speed signal into a digital wind speed signal, and providing the digital wind speed signal to the jam detecting unit (1) ) ; The clogging detecting unit (1) is connected to the data conversion module (303), and obtains a wind resistance characteristic parameter according to the digital wind speed signal and the rotation speed of the fan, and determines the clogging of the air filter according to the wind resistance characteristic parameter and the alarm threshold. degree.
8、根据权利要求 7所述的电子设备，其特征在于，所述装置还包括风扇控制单元（301 )， 与风扇 （4) 和所述堵塞检测单元 （1 ) 相连， 用于控制所述风扇 （4) 的转速， 并将所述风 扇 （4) 的转速信息提供给所述堵塞检测单元 （1 ) 。  The electronic device according to claim 7, characterized in that the device further comprises a fan control unit (301) connected to the fan (4) and the jam detecting unit (1) for controlling the fan (4) The rotational speed, and the rotational speed information of the fan (4) is supplied to the occlusion detecting unit (1).
9、 根据权利要求 8所述的电子设备， 其特征在于， 所述数据转换模块（303 ) 、 所述堵 塞检测单元 （1 ) 和所述风扇控制单元 （301 ) 集成于一体。  9. The electronic device according to claim 8, wherein the data conversion module (303), the congestion detecting unit (1) and the fan control unit (301) are integrated.
10、 根据权利要求 7所述的电子设备， 其特征在于， 所述风速检测单元 （2) 和所述数 据转换模块 （303 ) 集成于一体。  10. The electronic device according to claim 7, wherein the wind speed detecting unit (2) and the data conversion module (303) are integrated.
11、 一种防尘网堵塞程度检测方法， 其特征在于， 包括：  11. A method for detecting a degree of clogging of a dustproof net, comprising:
采集风扇的转速、 以及所述转速下的风速参数；  Collecting the speed of the fan and the wind speed parameter at the speed;
根据风扇的转速、 以及所述转速下的风速参数获得风阻特征参数；  Obtaining a wind resistance characteristic parameter according to a rotation speed of the fan and a wind speed parameter at the rotation speed;
根据所述风阻特征参数和告警阈值确定防尘网的堵塞程度。  Determining the degree of clogging of the air filter according to the wind resistance characteristic parameter and the alarm threshold.
12、 根据权利要求 11所述的方法， 其特征在于， 所述风速参数可以为数字风速信号。 12. The method according to claim 11, wherein the wind speed parameter is a digital wind speed signal.
13、 根据权利要求 11所述的方法， 其特征在于， 所述告警阈值由初始风阻特征参数确 定、 或者预先根据经验设定。 13. The method according to claim 11, wherein the alarm threshold is determined by an initial wind resistance characteristic parameter or is set according to experience in advance.
14、 根据权利要求 11所述的方法， 其特征在于， 所述采集风扇的转速、 以及所述转速 下的风速参数具体为： 每隔预定时间采集风扇的转速、 以及所述转速下的风速参数。  The method according to claim 11, wherein the speed of the collecting fan and the wind speed parameter at the rotating speed are specifically: collecting the rotating speed of the fan every predetermined time, and the wind speed parameter at the rotating speed .
15、根据权利要求 11至 14任一项所述的方法， 其特征在于， 当***硬件配置发生变化、 或防尘网更新时， 重新获得风阻特征参数和告警阈值。  The method according to any one of claims 11 to 14, wherein when the hardware configuration of the system changes or the air filter is updated, the wind resistance characteristic parameter and the alarm threshold are regained.
16、 根据权利要求 11所述的方法， 其特征在于， 所述根据风阻特征参数和告警阈值检 测防尘网的堵塞程度， 包括：  The method according to claim 11, wherein the detecting the degree of clogging of the air filter according to the wind resistance characteristic parameter and the alarm threshold includes:
判断当前风阻特征参数是否大于告警阈值， 若是， 则防尘网堵塞。  Determine whether the current windage characteristic parameter is greater than the alarm threshold. If yes, the air filter is blocked.
17、 根据权利要求 11所述的方法， 其特征在于， 当防尘网堵塞时， 发出告警。  17. The method according to claim 11, wherein an alarm is issued when the air filter is clogged.
PCT/CN2008/071903 2007-08-17 2008-08-06 Measuring device, method and electronic device for measuring blinding degree of dust screen WO2009024052A1 (en)

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