A method, device and system for measuring fan speed

Abstract

Embodiments of the present invention provide a fan speed measurement method, apparatus, and system. A piezomagnetic device made of flexible material and exhibiting a piezomagnetic effect is positioned in front of the fan's air outlet. The method comprises: obtaining elastic deformation data of the piezomagnetic device under wind force while the fan is operating; generating magnetic field intensity data corresponding to the elastic deformation data based on the piezomagnetic effect of the piezomagnetic device; converting the magnetic field intensity data into voltage data; and determining the fan's speed data based on the voltage data. Through the embodiments of the present invention, automated, real-time fan speed measurement is achieved, avoiding extensive repetitive work, improving the accuracy of test results, enhancing test efficiency, and avoiding testing methods that pose potential risks to the physical and mental health of test personnel.

Description

Technical Field

[0001] The present invention relates to the field of testing technology, and in particular to a fan speed measurement method, device and system. Background Art

[0002] For data center white box switches, heat dissipation is a key performance indicator. Air cooling is typically achieved by adjusting the speed and presence of the switch's rear-mounted fans. These fan speeds and fan presence are crucial indicators for verifying whether the switch is heating abnormally and operating normally.

[0003] When testing switch heat dissipation and fan functionality, a key metric is fan speed. Typically, testers use touch to sense the fan at the switch's air outlet to determine whether it is rotating at full speed, normal speed, or low speed. This primitive, manual testing method results in inaccurate results. Furthermore, testers frequently travel back and forth between the remote command input platform and the fan, reducing efficiency. Finally, due to the high noise levels between devices, prolonged testing between them can be detrimental to testers' physical and mental well-being. Summary of the Invention

[0004] In view of the above problems, a fan speed measurement method, device and system are proposed to overcome or at least partially solve the above problems, including:

[0005] A fan speed measurement system includes a piezomagnetic device made of a flexible material and having a piezomagnetic effect, arranged in front of a fan outlet, an electromagnetic conversion device connected to the piezomagnetic device, and a server, wherein:

[0006] The piezomagnetic device is used to generate elastic deformation under the action of wind when the fan is running, and generate magnetic field strength data based on the piezomagnetic effect, and transmit the magnetic field strength data to the electromagnetic conversion module in real time;

[0007] The electromagnetic conversion device is used to receive the magnetic field strength data and generate voltage data based on the magnetic field strength data;

[0008] The server is used to determine the rotation speed data of the fan according to the voltage data.

[0009] Optionally, the fan speed measurement system further includes an amplifying circuit, and the amplifying circuit is used to amplify the voltage data and transmit the amplified voltage data to a server.

[0010] A method for measuring fan speed, wherein a piezomagnetic device made of a flexible material and having a piezomagnetic effect is arranged in front of the fan outlet, the method comprising:

[0011] Acquiring elastic deformation data of the piezomagnetic device under the action of wind force when the fan is running;

[0012] generating magnetic field intensity data corresponding to the elastic deformation data based on the piezomagnetic effect of the piezomagnetic device;

[0013] Converting the magnetic field strength data into voltage data;

[0014] The fan speed data is determined according to the voltage data.

[0015] Optionally, determining the fan speed data according to the voltage data includes:

[0016] Obtaining a rotational speed coefficient of the fan and a piezomagnetic coefficient of the piezomagnetic device;

[0017] The fan speed data is determined based on the voltage data, the speed coefficient, and the piezoresistive system.

[0018] Optionally, it also includes:

[0019] Obtaining a mapping relationship between the fan's operating state and the fan's speed;

[0020] Based on the mapping relationship, the operating state of the fan at the current speed is determined.

[0021] Optionally, the fan is a heat dissipation fan of a switch, further comprising:

[0022] Obtaining an operating scenario of the switch;

[0023] Determining a target speed of the fan corresponding to the operating scenario;

[0024] When the current speed of the fan is continuously less than or greater than the target speed within a preset time, the current speed of the fan is adjusted according to the target speed.

[0025] Optionally, before determining the speed data of the fan according to the voltage data, the method further includes:

[0026] The voltage data is amplified.

[0027] A fan speed measuring device, wherein a piezomagnetic device is provided in front of the fan outlet, and the device comprises:

[0028] a data acquisition module, configured to acquire elastic deformation data of the piezomagnetic device under the action of wind when the fan is running;

[0029] a magnetic field data generating module, configured to generate magnetic field intensity data corresponding to the elastic deformation data based on the piezomagnetic effect of the piezomagnetic device;

[0030] A magnetoelectric conversion module, used for converting the magnetic field intensity data into voltage data;

[0031] A rotation speed determination module is used to determine the rotation speed data of the fan according to the voltage data.

[0032] A server includes a processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein the computer program implements the above-mentioned method for measuring fan speed when executed by the processor.

[0033] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method for measuring fan speed is implemented.

[0034] The embodiments of the present invention have the following advantages:

[0035] This embodiment of the present invention obtains elastic deformation data of the piezomagnetic device under wind force during fan operation; generates magnetic field strength data corresponding to the elastic deformation data based on the piezomagnetic effect of the piezomagnetic device; converts the magnetic field strength data into voltage data; and determines the fan's rotational speed data based on the voltage data. This embodiment of the present invention achieves automated, real-time measurement of fan rotational speed, avoiding extensive repetitive work, improving the accuracy of test results, increasing test efficiency, and avoiding testing methods that pose potential risks to the physical and mental health of test personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the description of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0037] Figure 1a 1 is a schematic diagram of a fan speed measurement system provided by an embodiment of the present invention;

[0038] Figure 1b This is a deformation diagram of a piezomagnetic device provided by one embodiment of the present invention;

[0039] Figure 2 This is a flowchart of a fan speed measurement method provided by one embodiment of the present invention;

[0040] Figure 3 is a flowchart of another fan speed measurement method provided by one embodiment of the present invention;

[0041] Figure 4is a flowchart of another fan speed measurement method provided by one embodiment of the present invention;

[0042] Figure 5 is a flowchart of another fan speed measurement method provided by one embodiment of the present invention;

[0043] Figure 6 is a flowchart of another fan speed measurement method provided by one embodiment of the present invention;

[0044] Figure 7a is a schematic diagram of another fan speed measurement system provided by an embodiment of the present invention;

[0045] Figure 7b This is a schematic diagram of a switch fan speed measurement process provided by an embodiment of the present invention;

[0046] Figure 8 It is a structural diagram of a device for measuring fan speed provided by one embodiment of the present invention. DETAILED DESCRIPTION

[0047] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments described are only a portion of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0048] For data center white box switches, heat dissipation is a key performance indicator. Air cooling is typically achieved by adjusting the speed and presence of the switch's rear-mounted fans. These fan speeds and fan presence are crucial indicators for verifying whether the switch is heating abnormally and operating normally.

[0049] In actual applications, the fan speed logic follows the following rules:

[0050] If all fans are in place, the ambient temperature is normal, and the switch temperature is normal, the fan speed is normal.

[0051] If not all fans are in place, the ambient temperature and the switch temperature are normal, the fans are running at full speed.

[0052] If all fans are in place and the ambient temperature is normal, but the switch's self-heating causes the body temperature to rise, the fans are running at full speed.

[0053] When all fans are in place and the ambient temperature rises, causing the switch body temperature to rise abnormally, the fan status is full rotation.

[0054] If all fans are in place, the ambient temperature is normal, the switch temperature is normal, and PWM modulation or software speed setting is used, the fan status is other speeds.

[0055] In a switch, the simple process for testing fan speed is as follows:

[0056] After the switch is powered on and the operating system is successfully entered, the tester waits for about 5 minutes to check the fan status and observe the fan speed. If the speed is normal, the test passes. An abnormal test scenario is constructed, one of the fans is unplugged, or the environment or equipment temperature is abnormally increased. The speed is observed. If it is full speed, the test passes. The fan speed is modulated to full speed, normal speed, and low speed through software or external PWM. The fan speed is observed to be in the corresponding modulation state. The test passes.

[0057] In the process of measuring the fan speed of the above-mentioned switch, a method of comparing manual perception with the actual speed regulation status is adopted. This method relies on manual tactile perception, which can easily lead to inaccurate judgment and inaccurate test results. It also requires frequent round trips between the console and the switch, which wastes time and leads to low test efficiency. Finally, being in a noisy experimental environment for a long time will also affect the physical and mental health of the testers.

[0058] In an embodiment of the present invention, a fan speed measurement system is constructed to automatically measure the fan speed when the fan is running, thereby avoiding a large amount of repetitive work, improving the accuracy of test results, increasing test efficiency, and avoiding testing methods that may pose potential risks to the physical and mental health of testers.

[0059] Reference Figure 1a , showing a fan speed measurement system 100 provided by an embodiment of the present invention, the fan speed measurement system 100 includes a piezomagnetic device 101 made of flexible material with a piezomagnetic effect arranged in front of the air outlet of a fan 111, an electromagnetic conversion device 102 connected to the piezomagnetic device 101, and a server 103 connected to the electromagnetic conversion device 102.

[0060] Among them, the piezomagnetic device 101 is used to undergo elastic deformation under the action of wind when the fan is running, and then generate magnetic field strength data based on the piezomagnetic effect, and transmit the magnetic field strength data to the electromagnetic conversion module 102 in real time; the electromagnetic conversion device 102 is used to receive the magnetic field strength data, and generate voltage data based on the magnetic field strength data; the server 103 is used to determine the speed data of the fan according to the voltage data.

[0061] The piezomagnetic effect is that under the action of external force, strain occurs inside the ferromagnetic material, generating stress, causing the boundaries between the magnetic domains to move, thereby causing the magnetization intensity vector of the magnetic domain to rotate, and thus the magnetization intensity of the ferromagnetic material also changes accordingly. This phenomenon of the magnetization intensity of the ferromagnetic material changing due to stress is called the piezomagnetic effect.

[0062] Piezoelectric devices are ferromagnetic materials with a piezomagnetic effect, which allows them to convert mechanical energy into electromagnetic energy. By placing ferromagnetic materials at fixed intervals at the air outlet, changes in wind pressure during fan speed adjustment cause the ferromagnetic materials to elastically deform, resulting in changes in magnetization intensity. This information is then collected and fed back to the server through the magnetoelectric conversion device. The server can then determine the fan's current position and speed based on the voltage value.

[0063] In practical applications, such as Figure 1b As shown, four symmetrical small holes 1, 2, 3, and 4 are opened in the middle of the piezoelectric device 101. An excitation winding N14 is wound between holes 1 and 4, and an output winding N23 is wound between holes 2 and 3. When an AC current flows through the excitation winding, a magnetic field is generated in the iron core.

[0064] like Figure 1b As shown on the left, when the force is 0, the piezoresistance is the same, the magnetic lines of force do not intersect with the output winding, and N23 does not generate an induced electromotive force.

[0065] like Figure 1b As shown on the right, when the fan is running, a pressure fp is applied to the flexible piezoresistive device 101 on the side of the air outlet. Under the action of the pressure fp, the piezoresistive device 101 deforms along the direction of the force, the magnetic permeability decreases, the magnetic resistance increases, and the magnetic lines of force generated by the excitation winding N14 will be redistributed. The magnetic lines of force interlink with N23 to generate an induced electromotive force E. The greater the pressure fp, the more obvious the deformation, the more magnetic flux the magnetic lines of force interlink with N23, and the greater the value of the induced electromotive force E.

[0066] In one embodiment of the present invention, the fan speed measurement system may further include an amplifier circuit between the electromagnetic conversion device and the server. The amplifier circuit is used to amplify the voltage data of the magnetoelectric conversion device and transmit it to the server for better voltage analysis.

[0067] In an embodiment of the present invention, the fan speed measurement system automatically starts measurement when the fan is running, uses voltage to calculate the current speed of the fan, and realizes automated measurement of the fan speed, avoids a lot of repetitive work, improves the accuracy of test results, improves test efficiency, and avoids test methods that may cause potential risks to the physical and mental health of test personnel.

[0068] Reference Figure 2, which shows a flowchart of a method for measuring fan speed provided by an embodiment of the present invention, wherein a piezomagnetic device made of a flexible material and having a piezomagnetic effect is provided in front of the fan outlet, and the method may specifically include the following steps:

[0069] Step 201, obtaining elastic deformation data of the piezomagnetic device under the action of wind force when the fan is running;

[0070] When the fan is running, wind pressure is generated, and the wind pressure is applied to the piezoresistive device in front of the air outlet, causing the piezoresistive device to deform.

[0071] Step 202: generating magnetic field intensity data corresponding to the elastic deformation data based on the piezomagnetic effect of the piezomagnetic device;

[0072] Piezomagnetic devices are ferromagnetic materials with piezomagnetic effect, such as piezomagnetic sensor arrays. Piezomagnetic devices can realize the conversion between mechanical energy and electromagnetic energy. When the piezomagnetic device undergoes elastic deformation under the action of wind pressure, the magnetic intensity generated by the piezomagnetic material will change. The change in its magnetic intensity has a corresponding relationship with the elastic deformation data.

[0073] Step 203, converting the magnetic field strength data into voltage data;

[0074] After obtaining the magnetic field strength data, an electromotive force can be generated based on the change in magnetic strength, that is, the magnetic strength data can be converted into voltage data.

[0075] Step 204: Determine the fan speed data according to the voltage data.

[0076] The voltage data can be directly detected by a voltage measuring device. After the voltage data is obtained, the current fan speed can be calculated based on the conversion relationship between the voltage and the fan speed.

[0077] In an embodiment of the present invention, elastic deformation data of the piezomagnetic device under the action of wind when the fan is running is obtained; magnetic field strength data corresponding to the elastic deformation data is generated based on the piezomagnetic effect of the piezomagnetic device; the magnetic field strength data is converted into voltage data; and the rotational speed data of the fan is determined based on the voltage data, thereby realizing automated real-time measurement of the fan rotational speed, avoiding a large amount of repetitive work, improving the accuracy of test results, improving test efficiency, and avoiding test methods that may cause potential risks to the physical and mental health of test personnel.

[0078] Reference Figure 3 , which shows a flowchart of another method for measuring fan speed provided by an embodiment of the present invention. A piezomagnetic device made of a flexible material with a piezomagnetic effect is provided in front of the fan outlet. Specifically, the method may include the following steps:

[0079] Step 301, obtaining elastic deformation data of the piezomagnetic device under the action of wind force when the fan is running;

[0080] When the fan is running, wind pressure is generated, and the wind pressure is applied to the piezomagnetic device in front of the air outlet. The piezomagnetic device can be set to a flexible material, so that the piezomagnetic device is deformed under the action of wind.

[0081] Step 302: Generate magnetic field intensity data corresponding to the elastic deformation data based on the piezomagnetic effect of the piezomagnetic device;

[0082] Piezomagnetic devices are ferromagnetic materials with piezomagnetic effect, such as piezomagnetic sensor arrays. Piezomagnetic devices can realize the conversion between mechanical energy and electromagnetic energy. When the piezomagnetic device undergoes elastic deformation under the action of wind pressure, the magnetic intensity generated by the piezomagnetic material will change. The change in its magnetic intensity has a corresponding relationship with the elastic deformation data.

[0083] Step 303, converting the magnetic field strength data into voltage data;

[0084] After obtaining the magnetic field strength data, an electromotive force can be generated based on the change in magnetic strength, that is, the magnetic strength data can be converted into voltage data.

[0085] Step 304, obtaining the speed coefficient of the fan and the piezomagnetic coefficient of the piezomagnetic device;

[0086] There is a conversion relationship between the fan's speed and wind pressure, and the speed coefficient is used to convert the wind pressure generated by the fan to the speed; there is also a conversion relationship between the wind pressure and the magnetic intensity data generated based on the wind pressure, which is represented by the piezomagnetic coefficient of the piezomagnetic device.

[0087] For example, s Indicates the fan speed. The outlet air pressure is proportional to the fan speed. The speed v s The faster the wind pressure f p The larger the value, the relationship between wind pressure and speed can be expressed as:

[0088] f p =k v ·v s

[0089] Among them, k v is the proportional coefficient of fan speed (i.e. speed coefficient), k v ≠0.

[0090] Magnetic induction intensity B and outlet wind pressure f p is proportional to, and its expression can be written as:

[0091] B=k b f p

[0092] Among them, k b is the proportional coefficient between outlet wind pressure and magnetic induction intensity (i.e., piezomagnetic coefficient), k b ≠0.

[0093] Step 305 : Determine the speed data of the fan based on the voltage data, the speed coefficient, and the piezomagnetic coefficient.

[0094] After the voltage data is obtained, the fan speed data can be calculated based on the voltage data, the speed coefficient, and the piezomagnetic coefficient.

[0095] In an embodiment of the present invention, elastic deformation data of the piezomagnetic device under the action of wind when the fan is running is obtained; magnetic field strength data corresponding to the elastic deformation data is generated based on the piezomagnetic effect of the piezomagnetic device; the magnetic field strength data is converted into voltage data; the speed coefficient of the fan and the piezomagnetic coefficient of the piezomagnetic device are obtained; based on the voltage data, the speed coefficient and the piezomagnetic system, the speed data of the fan is determined to realize automated real-time measurement of the fan speed, avoid a lot of repetitive work, improve the accuracy of test results, improve test efficiency, and avoid test methods that may cause potential risks to the physical and mental health of test personnel.

[0096] Reference Figure 4 , which shows a flowchart of another method for measuring fan speed provided by an embodiment of the present invention. A piezomagnetic device made of a flexible material with a piezomagnetic effect is provided in front of the fan outlet. Specifically, the method may include the following steps:

[0097] Step 401, obtaining elastic deformation data of the piezomagnetic device under the action of wind force when the fan is running;

[0098] When the fan is running, wind pressure is generated, and the wind pressure is applied to the piezomagnetic device in front of the air outlet. The piezomagnetic device can be made of flexible material, so that the piezomagnetic device is deformed under the action of wind force.

[0099] Step 402: Generate magnetic field intensity data corresponding to the elastic deformation data based on the piezomagnetic effect of the piezomagnetic device;

[0100] Piezomagnetic devices are ferromagnetic materials with piezomagnetic effect, such as piezomagnetic sensor arrays. Piezomagnetic devices can realize the conversion between mechanical energy and electromagnetic energy. When the piezomagnetic device undergoes elastic deformation under the action of wind pressure, the magnetic intensity generated by the piezomagnetic material will change. The change in its magnetic intensity has a corresponding relationship with the elastic deformation data.

[0101] Step 403, converting the magnetic field strength data into voltage data;

[0102] After obtaining the magnetic field strength data, an electromotive force can be generated based on the change in magnetic strength, that is, the magnetic strength data can be converted into voltage data.

[0103] Step 404, amplifying the voltage data;

[0104] After the magnetic field strength data is converted into voltage, the voltage may be amplified to ensure the accuracy of the voltage data and to ensure that the voltage data can be detected. For example, if the generated voltage is too small, the voltage data may not be accurately obtained.

[0105] Step 405, obtaining the speed coefficient of the fan and the piezomagnetic coefficient of the piezomagnetic device;

[0106] There is a conversion relationship between the fan's speed and wind pressure, and the speed coefficient is used to convert the wind pressure generated by the fan to the speed; there is also a conversion relationship between the wind pressure and the magnetic intensity data generated based on the wind pressure, which is represented by the piezomagnetic coefficient of the piezomagnetic device.

[0107] For example, s Indicates the fan speed. The outlet air pressure is proportional to the fan speed. The speed v s The faster, the wind pressure f p The larger the value, the relationship between wind pressure and speed can be expressed as:

[0108] f p =k v ·v s ;

[0109] Among them, k v is the proportional coefficient of fan speed (i.e. speed coefficient), k v ≠0.

[0110] Magnetic induction intensity B and outlet wind pressure f p is proportional to, and its expression can be written as:

[0111] B=k b f p

[0112] Among them, k b is the proportional coefficient between outlet wind pressure and magnetic induction intensity (i.e., piezomagnetic coefficient), k b ≠0.

[0113] Step 406 : Determine the speed data of the fan based on the voltage data, the speed coefficient, and the piezomagnetic coefficient.

[0114] After the voltage data is obtained, the fan speed data can be calculated based on the voltage data, the speed coefficient, and the piezomagnetic coefficient.

[0115] Step 407: Obtain a mapping relationship between the fan's operating state and the fan's speed;

[0116] In practical applications, the fan speed can be divided into different operating states, and a mapping relationship between the fan operating state and the fan speed can be established.

[0117] Step 408: Determine the operating state of the fan at the current speed based on the mapping relationship.

[0118] After the fan speed is obtained, the fan's current operating state is determined according to the current speed.

[0119] In an embodiment of the present invention, elastic deformation data of the piezomagnetic device under the action of wind when the fan is running is obtained; magnetic field strength data corresponding to the elastic deformation data is generated based on the piezomagnetic effect of the piezomagnetic device; the magnetic field strength data is converted into voltage data; the voltage data is amplified to obtain the speed coefficient of the fan and the piezomagnetic coefficient of the piezomagnetic device; based on the voltage data, the speed coefficient and the piezomagnetic system, the speed data of the fan is determined, and a mapping relationship between the working state of the fan and the fan speed is obtained; based on the mapping relationship, the working state of the fan at the current speed is determined, and automatic real-time measurement of the fan speed and determination of the current working condition of the fan are realized, thereby avoiding a lot of repetitive work, improving the accuracy of test results, improving test efficiency, and avoiding test methods that may cause potential risks to the physical and mental health of test personnel.

[0120] Reference Figure 5 , which shows a flowchart of another method for measuring fan speed provided by an embodiment of the present invention. A piezomagnetic device made of a flexible material with a piezomagnetic effect is provided in front of the fan outlet. Specifically, the method may include the following steps:

[0121] Step 501: Obtain elastic deformation data of the piezoresistive device under the action of wind when the fan is running; the fan is a heat dissipation fan of the switch;

[0122] When the fan is running, wind pressure is generated, and the wind pressure is applied to the piezomagnetic device in front of the air outlet. The piezomagnetic device can be made of flexible material, so that the piezomagnetic device is deformed under the action of wind force.

[0123] Step 502: Generate magnetic field intensity data corresponding to the elastic deformation data based on the piezomagnetic effect of the piezomagnetic device;

[0124] Piezomagnetic devices are ferromagnetic materials with piezomagnetic effect, such as piezomagnetic sensor arrays. Piezomagnetic devices can realize the conversion between mechanical energy and electromagnetic energy. When the piezomagnetic device undergoes elastic deformation under the action of wind pressure, the magnetic intensity generated by the piezomagnetic material will change. The change in its magnetic intensity has a corresponding relationship with the elastic deformation data.

[0125] Step 503, converting the magnetic field strength data into voltage data;

[0126] After obtaining the magnetic field strength data, an electromotive force can be generated based on the change in magnetic strength, that is, the magnetic strength data can be converted into voltage data.

[0127] Step 504, obtaining the speed coefficient of the fan and the piezomagnetic coefficient of the piezomagnetic device;

[0128] There is a conversion relationship between the fan's speed and wind pressure, and the speed coefficient is used to convert the wind pressure generated by the fan to the speed; there is also a conversion relationship between the wind pressure and the magnetic intensity data generated based on the wind pressure, which is represented by the piezomagnetic coefficient of the piezomagnetic device.

[0129] For example, s Indicates the fan speed. The outlet air pressure is proportional to the fan speed. The speed v s The faster, the wind pressure f p The larger the value, the relationship between wind pressure and speed can be expressed as:

[0130] f p =k v ·v s

[0131] Among them, k v is the proportional coefficient of fan speed (i.e. speed coefficient), k v ≠0.

[0132] Magnetic induction intensity B and outlet wind pressure f p is proportional to, and its expression can be written as:

[0133] B=k b f p

[0134] Among them, k b is the proportional coefficient between outlet wind pressure and magnetic induction intensity (i.e., piezomagnetic coefficient), k b ≠0.

[0135] Step 505 : Determine the speed data of the fan based on the voltage data, the speed coefficient, and the piezoresistive system.

[0136] After the voltage data is obtained, the fan speed data can be calculated based on the voltage data, the speed coefficient, and the piezomagnetic coefficient.

[0137] Step 506: Obtain the operating scenario of the switch;

[0138] The switch has different requirements for its fan in different operating scenarios. For example, when the switch runs at high speed, the switch temperature rises quickly, so the fan speed needs to be increased to achieve rapid heat dissipation and ensure that the switch performance is not affected.

[0139] Step 507, determining a target speed corresponding to the fan in the operating scenario;

[0140] After obtaining the switch operation scenario, the target fan speed in the operation scenario can be determined. The target speed is a speed within the tolerable speed range of the fan itself that enables the switch to achieve optimal performance.

[0141] Step 508 : When the current speed of the fan is continuously lower than or higher than the target speed within a preset time period, adjust the current speed of the fan according to the target speed.

[0142] During the operation of the fan, the fan itself will be regulated and controlled by other components, so that the fan speed may fluctuate to a certain extent. When the fan is not at the target speed to maintain the optimal state of the switch for a long time, it may affect the performance of the switch. Therefore, when it is detected that the current speed does not match the target speed, the timer starts. If the current speed of the fan continues to mismatch the target speed within the preset time, the adjustment of the fan speed can be triggered, and the target speed of the fan can be adjusted according to the target speed.

[0143] During the adjustment process, the speed can be adjusted by gradually increasing or decreasing the speed to avoid large speed fluctuations that may damage the performance of the fan itself.

[0144] In an embodiment of the present invention, elastic deformation data of the piezomagnetic device under the action of wind when the fan is running is obtained; magnetic field strength data corresponding to the elastic deformation data is generated based on the piezomagnetic effect of the piezomagnetic device; the magnetic field strength data is converted into voltage data; the speed coefficient of the fan and the piezomagnetic coefficient of the piezomagnetic device are obtained; based on the voltage data, the speed coefficient and the piezomagnetic system, the speed data of the fan is determined, and the operation scenario of the switch is obtained; the target speed corresponding to the fan in the operation scenario is determined; when the current speed of the fan is continuously less than or greater than the target speed within a preset time, the current speed of the fan is adjusted according to the target speed to realize automatic real-time measurement of the fan speed, avoid a lot of repetitive work, improve the accuracy of test results, improve test efficiency, and avoid test methods that may cause potential risks to the physical and mental health of testers.

[0145] Reference Figure 6, which shows a flowchart of another method for measuring fan speed provided by an embodiment of the present invention. A piezomagnetic device made of a flexible material with a piezomagnetic effect is provided in front of the fan outlet. Specifically, the method may include the following steps:

[0146] Step 601: Obtain elastic deformation data of the piezoresistive device under the action of wind when the fan is running; the fan is a heat dissipation fan of the switch;

[0147] When the fan is running, wind pressure is generated, and the wind pressure is applied to the piezomagnetic device in front of the air outlet. The piezomagnetic device can be made of flexible material, so that the piezomagnetic device is deformed under the action of wind force.

[0148] Step 602: Generate magnetic field intensity data corresponding to the elastic deformation data based on the piezomagnetic effect of the piezomagnetic device;

[0149] Piezomagnetic devices are ferromagnetic materials with piezomagnetic effect, such as piezomagnetic sensor arrays. Piezomagnetic devices can realize the conversion between mechanical energy and electromagnetic energy. When the piezomagnetic device undergoes elastic deformation under the action of wind pressure, the magnetic intensity generated by the piezomagnetic material will change. The change in its magnetic intensity has a corresponding relationship with the elastic deformation data.

[0150] Step 603, converting the magnetic field strength data into voltage data;

[0151] After obtaining the magnetic field strength data, an electromotive force can be generated based on the change in magnetic strength, that is, the magnetic strength data can be converted into voltage data.

[0152] Step 604: amplify the voltage data

[0153] After the magnetic field strength data is converted into voltage, the voltage may be amplified to ensure the accuracy of the voltage data and to ensure that the voltage data can be detected. For example, if the generated voltage is too small, the voltage data may not be accurately obtained.

[0154] Step 605, obtaining the speed coefficient of the fan and the piezomagnetic coefficient of the piezomagnetic device;

[0155] There is a conversion relationship between the fan's speed and wind pressure, and the speed coefficient is used to convert the wind pressure generated by the fan to the speed; there is also a conversion relationship between the wind pressure and the magnetic intensity data generated based on the wind pressure, which is represented by the piezomagnetic coefficient of the piezomagnetic device.

[0156] For example, s Indicates the fan speed. The outlet air pressure is proportional to the fan speed. The speed v s The faster the wind pressure f p The larger the value, the relationship between wind pressure and speed can be expressed as:

[0157] fp =k v ·v s

[0158] Among them, k v is the proportional coefficient of fan speed (i.e. speed coefficient), k v ≠0.

[0159] Magnetic induction intensity B and outlet wind pressure f p is proportional to, and its expression can be written as:

[0160] B=k b f p

[0161] Among them, k b is the proportional coefficient between outlet wind pressure and magnetic induction intensity (i.e., piezomagnetic coefficient), k b ≠0.

[0162] Step 606: Determine the speed data of the fan based on the voltage data, the speed coefficient, and the piezomagnetic coefficient.

[0163] After the voltage data is obtained, the fan speed data can be calculated based on the voltage data, the speed coefficient, and the piezomagnetic coefficient.

[0164] Step 607: Obtain a mapping relationship between the fan's operating state and the fan's speed;

[0165] In practical applications, the fan speed can be divided into different operating states, and a mapping relationship between the fan operating state and the fan speed can be established.

[0166] Step 608: Determine the operating state of the fan at the current speed based on the mapping relationship.

[0167] After the fan speed is obtained, the fan's current operating state is determined according to the current speed.

[0168] Step 609: Obtain the operating scenario of the switch;

[0169] The switch has different requirements for its fan in different operating scenarios. For example, when the switch runs at high speed, the switch temperature rises quickly, so the fan speed needs to be increased to achieve rapid heat dissipation and ensure that the switch performance is not affected.

[0170] Step 610, determining a target speed corresponding to the fan in the operating scenario;

[0171] After obtaining the switch operation scenario, the target fan speed in the operation scenario can be determined. The target speed is a speed within the tolerable speed range of the fan itself that enables the switch to achieve optimal performance.

[0172] Step 611 : When the current speed of the fan is continuously lower than or higher than the target speed within a preset time, adjust the current speed of the fan according to the target speed.

[0173] During the operation of the fan, the fan itself will be regulated and controlled by other components, so that the fan speed may fluctuate to a certain extent. When the fan is not at the target speed to maintain the optimal state of the switch for a long time, it may affect the performance of the switch. Therefore, when it is detected that the current speed does not match the target speed, the timer starts. If the current speed of the fan continues to mismatch the target speed within the preset time, the adjustment of the fan speed can be triggered, and the target speed of the fan can be adjusted according to the target speed.

[0174] During the adjustment process, the speed can be adjusted by gradually increasing or decreasing the speed to avoid large speed fluctuations that may damage the performance of the fan itself.

[0175] In an embodiment of the present invention, elastic deformation data of the piezomagnetic device under the action of wind when the fan is running is obtained; magnetic field strength data corresponding to the elastic deformation data is generated based on the piezomagnetic effect of the piezomagnetic device; the magnetic field strength data is converted into voltage data; the speed coefficient of the fan and the piezomagnetic coefficient of the piezomagnetic device are obtained; based on the voltage data, the speed coefficient and the piezomagnetic system, the speed data of the fan is determined, and the operation scenario of the switch is obtained; the target speed corresponding to the fan in the operation scenario is determined; when the current speed of the fan is continuously less than or greater than the target speed within a preset time, the current speed of the fan is adjusted according to the target speed to realize automatic real-time measurement of the fan speed, avoid a lot of repetitive work, improve the accuracy of test results, improve test efficiency, and avoid test methods that may cause potential risks to the physical and mental health of testers.

[0176] The following combination Figure 7a - Figure 7b The above embodiments of the present invention are exemplarily described as follows:

[0177] like Figure 7a As shown, a piezomagnetic sensor array can be set at the air outlet of the switch, the piezomagnetic sensor array is connected to the magnetoelectric conversion device, the magnetoelectric conversion device is connected to the amplifier circuit, and the amplifier circuit is connected to the server.

[0178] based on Figure 7a The fan speed measurement system can achieve Figure 7b The measurement process shown includes the following steps:

[0179] S11, switch fan speed adjustment.

[0180] Place a piezomagnetic sensor array at the air outlet of the switch, with the diameter of a single piezomagnetic sensor close to the air outlet.

[0181] S12, stress causes elastic deformation of ferromagnetic materials.

[0182] After the switch is powered on and started normally, the device runs and the change in air pressure at the air outlet causes the piezoresistive sensor array to undergo elastic deformation.

[0183] S13, the piezomagnetic effect causes the magnetic field strength to change.

[0184] Piezomagnetic sensing array, according to the piezomagnetic effect, when ferromagnetic materials are deformed by pressure, the magnetic permeability decreases along the stress direction and increases vertically along the stress direction, the distribution of magnetic lines of force changes, and thus the magnetic field strength changes.

[0185] S14, magnetoelectric conversion device and amplifier circuit.

[0186] When the magnetic field strength changes, some magnetic lines of force intersect with the measurement winding of the magnetoelectric converter, generating an induced electromotive force in the winding. The greater the force, the greater the induced electromotive force. After the device has been powered on for a while, with the fan in place, the ambient temperature, and the switch temperature normal, the fan resumes normal speed. At this point, the air pressure at the outlet is lower than at full speed, and the degree of elastic deformation is different from that at full speed. This changes the magnetic field strength of the piezoresistive sensor, causing the induced electromotive force to differ, and the voltage after passing through the amplification circuit is different from that at full speed.

[0187] Similarly, when fan speed is controlled by software, fan presence, or an external PWM device, instantaneous changes in outlet pressure can cause voltage differences. Because the induced electromotive force is proportional to pressure, and outlet pressure is proportional to speed, faster speeds result in greater pressure and voltage, and vice versa.

[0188] S15, the server collects voltage data and calculates the rotation speed.

[0189] v s Indicates the fan speed. The outlet air pressure is proportional to the fan speed. The speed v s The faster, the wind pressure f p The larger the value, the relationship between wind pressure and speed can be expressed as:

[0190] f p =k v ·v s ;

[0191] Among them, k v is the proportional coefficient of fan speed (i.e. speed coefficient), k v ≠0.

[0192] When the fan speed vs =0, f p =0; in the absence of external force, the magnetic permeability of the piezomagnetic material in all directions is the same, the magnetic lines of force are not coupled with the measuring winding, and no induced electromotive force is generated, so the induced electromotive force is: E=0.

[0193] When the fan speed v s ≠0, the outlet pressure f p ≠0 and acts on the piezomagnetic sensor array. Due to the piezomagnetic effect, the magnetic permeability parallel to the direction of the force and perpendicular to the direction of the force are different. In this way, the magnetic flux lines generated by the excitation winding will be redistributed, and some of the magnetic flux lines will interlink with the output winding to generate an induced electromotive force. p Increases, the magnetic flux lines connected to the output winding increase, the magnetic induction intensity B increases, and the magnetic flux As it increases, the induced electromotive force E also becomes larger.

[0194] The calculation formula of induced electromotive force is:

[0195]

[0196] Where n is the number of turns of the winding coil.

[0197] Magnetic induction intensity B and outlet wind pressure f p is proportional to, and its expression can be written as:

[0198] B=k b f p ,

[0199] Among them, k b k is the proportional coefficient between outlet wind pressure and magnetic induction intensity, b ≠0;

[0200] The magnetic flux can be expressed as:

[0201]

[0202] Where S is the area of the cross section through which the magnetic flux lines pass;

[0203] According to the above combinations, the formula for calculating the induced electromotive force and the outlet air pressure is:

[0204]

[0205] Substituting the expressions of wind pressure and speed, we can obtain the calculation formula of induced electromotive force and speed:

[0206]

[0207] The output voltage after the amplifier circuit is: Among them, ke is the gain factor of the amplifier circuit.

[0208] The fan speed is calculated based on the output voltage:

[0209]

[0210] Therefore, after the server collects the voltage, the current speed of the fan can be calculated according to the above formula.

[0211] It should be noted that for the sake of simplicity, the method embodiments are described as a series of actions. However, those skilled in the art should be aware that the embodiments of the present invention are not limited by the order of the actions described, because according to the embodiments of the present invention, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in this specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present invention.

[0212] Reference Figure 8 , shows a schematic structural diagram of a device for measuring fan speed provided by an embodiment of the present invention, wherein a piezomagnetic device is provided in front of the fan outlet, and specifically includes the following modules:

[0213] A data acquisition module 801 is used to acquire elastic deformation data of the piezomagnetic device under the action of wind when the fan is running;

[0214] A magnetic field data generating module 802 is configured to generate magnetic field intensity data corresponding to the elastic deformation data based on the piezomagnetic effect of the piezomagnetic device;

[0215] The magnetoelectric conversion module 803 is used to convert the magnetic field strength data into voltage data;

[0216] The speed determination module 804 is configured to determine the speed data of the fan according to the voltage data.

[0217] In one embodiment of the present invention, the speed determination module 804 may include:

[0218] A coefficient acquisition submodule, configured to acquire a rotational speed coefficient of the fan and a piezomagnetic coefficient of the piezomagnetic device;

[0219] The speed determination submodule is configured to determine the speed data of the fan based on the voltage data, the speed coefficient, and the piezoresistive system.

[0220] In one embodiment of the present invention, the apparatus may further include:

[0221] A mapping relationship determination module, configured to obtain a mapping relationship between the operating state of the fan and the fan speed;

[0222] The operating state determination module is used to determine the operating state of the fan at the current speed based on the mapping relationship.

[0223] In one embodiment of the present invention, the fan is a heat dissipation fan of a switch, and the device may further include:

[0224] An operating scenario acquisition module, configured to acquire the operating scenario of the switch;

[0225] A target speed determination module, configured to determine a target speed corresponding to the fan in the operating scenario;

[0226] The speed adjustment module is configured to adjust the current speed of the fan according to the target speed when the current speed of the fan is continuously less than or greater than the target speed within a preset time.

[0227] In one embodiment of the present invention, the apparatus may further include:

[0228] The amplification processing module is used to amplify the voltage data.

[0229] An embodiment of the present invention further provides a server, which may include a processor, a memory, and a computer program stored in the memory and capable of running on the processor. When the computer program is executed by the processor, the above-mentioned fan speed measurement method is implemented.

[0230] An embodiment of the present invention further provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the method for measuring the fan speed is implemented.

[0231] As for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0232] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0233] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, apparatus, or computer program products. Thus, embodiments of the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, embodiments of the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0234] The embodiments of the present invention are described with reference to the flowcharts and / or block diagrams of the methods, terminal devices (systems), and computer program products according to the embodiments of the present invention. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing terminal device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal device generate a device for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0235] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device that implements the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0236] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device so that a series of operating steps are executed on the computer or other programmable terminal device to produce computer-implemented processing, so that the instructions executed on the computer or other programmable terminal device provide steps for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0237] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they become aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0238] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or terminal device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or terminal device that includes the element.

[0239] The above is a detailed introduction to the provided fan speed measurement method, device and system. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the ideas of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A fan speed measurement system, characterized in that: The fan speed measurement system includes a piezomagnetic device made of a flexible material with a piezomagnetic effect arranged in front of the fan outlet, an electromagnetic conversion device connected to the piezomagnetic device, and a server connected to the electromagnetic conversion device, wherein: The piezomagnetic device is used to generate elastic deformation under the action of wind when the fan is running, and generate magnetic field strength data based on the piezomagnetic effect, and transmit the magnetic field strength data to the electromagnetic conversion module in real time; The electromagnetic conversion device is used to receive the magnetic field strength data and generate voltage data based on the magnetic field strength data; The server is used to determine the speed data of the fan according to the voltage data, including: obtaining the speed coefficient of the fan and the piezomagnetic coefficient of the piezomagnetic device; and determining the speed data of the fan based on the voltage data, the speed coefficient and the piezomagnetic coefficient.

2. The system according to claim 1, wherein: The fan speed measurement system further includes an amplifier circuit, which is used to amplify the voltage data and transmit the amplified voltage data to a server.

3. A method for measuring fan speed, characterized in that: A piezomagnetic device made of a flexible material having a piezomagnetic effect is provided in front of the fan outlet, and the method comprises: Acquiring elastic deformation data of the piezomagnetic device under the action of wind force when the fan is running; generating magnetic field intensity data corresponding to the elastic deformation data based on the piezomagnetic effect of the piezomagnetic device; Converting the magnetic field strength data into voltage data; Determining the speed data of the fan according to the voltage data includes: acquiring a speed coefficient of the fan and a piezomagnetic coefficient of the piezomagnetic device; and determining the speed data of the fan based on the voltage data, the speed coefficient, and the piezomagnetic coefficient.

4. The method according to claim 3, characterized in that Also includes: Obtaining a mapping relationship between the fan's operating state and the fan's speed; Based on the mapping relationship, the operating state of the fan at the current speed is determined.

5. The method according to claim 3, characterized in that The fan is a heat dissipation fan of the switch, and further includes: Obtaining an operating scenario of the switch; Determining a target speed of the fan corresponding to the operating scenario; When the current speed of the fan is continuously less than or greater than the target speed within a preset time, the current speed of the fan is adjusted according to the target speed.

6. The method according to claim 3, characterized in that Before determining the rotation speed data of the fan according to the voltage data, the method further includes: The voltage data is amplified.

7. A fan speed measuring device, characterized in that: A piezomagnetic device made of a flexible material with a piezomagnetic effect is provided in front of the fan outlet, and the device comprises: a data acquisition module, configured to acquire elastic deformation data of the piezomagnetic device under the action of wind when the fan is running; a magnetic field data generating module, configured to generate magnetic field intensity data corresponding to the elastic deformation data based on the piezomagnetic effect of the piezomagnetic device; A magnetoelectric conversion module, used for converting the magnetic field intensity data into voltage data; The speed determination module is used to determine the speed data of the fan according to the voltage data, including: obtaining the speed coefficient of the fan and the piezomagnetic coefficient of the piezomagnetic device; and determining the speed data of the fan based on the voltage data, the speed coefficient and the piezomagnetic coefficient.

8. A server, characterized in that: The method comprises a processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein when the computer program is executed by the processor, the method for measuring the fan speed according to any one of claims 3 to 6 is implemented.

9. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method for measuring the fan speed according to any one of claims 3 to 6 is implemented.

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