CN111366742A - Fan rotating speed detection device and method based on server - Google Patents
Fan rotating speed detection device and method based on server Download PDFInfo
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- CN111366742A CN111366742A CN202010150035.9A CN202010150035A CN111366742A CN 111366742 A CN111366742 A CN 111366742A CN 202010150035 A CN202010150035 A CN 202010150035A CN 111366742 A CN111366742 A CN 111366742A
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- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 5
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/46—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring amplitude of generated current or voltage
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Abstract
The invention relates to the technical field of servers, and provides a fan rotating speed detection device and a fan rotating speed detection method based on a server, wherein the device comprises a first fan rotating speed detection unit, a second fan rotating speed detection unit and a fan rotating speed comparison unit, wherein the first fan rotating speed detection unit acquires a first rotating speed parameter of a current fan by utilizing a positive piezoelectric effect; the second fan rotating speed detecting unit acquires a second rotating speed parameter of the fan from a Hall assembly arranged on the fan body; the fan rotating speed comparison unit compares the received first rotating speed parameter with the received second rotating speed parameter, judges whether the first rotating speed parameter and the second rotating speed parameter are equal, judges that the Hall assembly on the fan body works normally when the first rotating speed parameter and the second rotating speed parameter are equal, and judges that the Hall assembly on the fan body works abnormally when the first rotating speed parameter and the second rotating speed parameter are not equal, so that the fan body is prevented from returning wrong judgment of the fan caused by a false TACH value, and stable operation of the fan and the server is guaranteed.
Description
Technical Field
The invention belongs to the technical field of servers, and particularly relates to a fan rotating speed detection device and method based on a server.
Background
Under normal operation, the server utilizes a Baseboard Management Controller (BMC) to monitor the temperature to prevent the chip from overheating and reducing the system performance, and the BMC generally adjusts the temperature of the whole system through controlling the rotation speed of the fan in the chassis, which may cause abnormal operation of the server or possibility of burn-in if the temperature of the system cannot be timely reduced.
At present, the detection of the system fan rotation speed of the server is to transmit a TACH value of the fan rotation speed back to the BMC through the fan body, and if the TACH value is a wrong value, the control of the fan rotation speed is disabled, so that the temperature of the server system cannot be regulated.
Disclosure of Invention
The invention provides a fan rotating speed detection device based on a server, aiming at solving the problem that the temperature of a server system cannot be regulated and controlled due to failure of fan rotating speed control when a TACH value of the fan rotating speed returned by a fan body is wrong in the prior art.
The technical scheme provided by the invention is as follows: a fan speed detection device based on a server comprises a first fan speed detection unit, a second fan speed detection unit and a fan speed comparison unit, wherein:
the first fan rotating speed detecting unit is used for acquiring a first rotating speed parameter of the current fan by utilizing a positive piezoelectric effect and sending the acquired first rotating speed parameter to the fan rotating speed comparing unit;
the second fan rotating speed detecting unit is used for acquiring a second rotating speed parameter of the fan from a Hall assembly arranged on the fan body and sending the acquired second rotating speed parameter to the fan rotating speed comparing unit;
the fan rotating speed comparison unit is respectively connected with the first fan rotating speed detection unit and the second fan rotating speed detection unit, and is used for comparing a first rotating speed parameter sent by the first fan rotating speed detection unit and a second rotating speed parameter sent by the second fan rotating speed detection unit which are received at the same moment, judging whether the first rotating speed parameter and the second rotating speed parameter are equal, judging that the Hall assembly on the fan body works normally when the first rotating speed parameter and the second rotating speed parameter are equal, and judging that the Hall assembly on the fan body works abnormally when the first rotating speed parameter and the second rotating speed parameter are not equal.
As an improved solution, the first fan speed detecting unit specifically includes:
the piezoelectric voltage detection circuit is used for detecting the rotating speed of the fan and acquiring a voltage signal converted from mechanical energy;
the voltage signal comparison module is used for acquiring a first rotating speed parameter of the current fan corresponding to the voltage signal according to the fan rotating speed and voltage signal comparison table stored in the database;
the first rotating speed parameter sending module is used for sending the obtained first rotating speed parameter to the fan rotating speed comparing unit;
and the database is used for storing a pre-configured comparison table of the rotating speed of the fan and the voltage signal.
As an improved scheme, the piezoelectric voltage detection circuit comprises a loop consisting of a piezoelectric sheet, an output capacitor C1 and a three-purpose meter, wherein:
the piezoelectric plate is arranged in the air supply range of the fan, the electric polarization direction of the piezoelectric plate is parallel to the air blowing direction of the fan, the body length of the piezoelectric plate deforms under the action of the wind force of the fan, and the deformation of the piezoelectric plate is controlled to accumulate electric energy on the output capacitor C1;
the output capacitor C1 is used for accumulating the electric energy generated when the piezoelectric sheet deforms;
the three-purpose electric meter is used for measuring the accumulated electric energy of the output capacitor C1 and feeding back the measured voltage signal to the voltage signal comparison module.
As an improved scheme, the piezoelectric voltage detection circuit further comprises a voltage stabilizing circuit and a filter circuit;
the voltage stabilizing circuit comprises a diode D1 and a diode D2 which are connected in series, and the filter circuit comprises a capacitor C2 which is connected in parallel at two ends of the electricity meter.
As an improved solution, the first fan speed detecting unit further includes:
and the fan rotating speed and voltage signal comparison table generation module is used for controlling the learning of the piezoelectric effect of the piezoelectric sheet and establishing a corresponding relation between the fan rotating speed and the voltage signal, wherein a linear relation exists between the fan rotating speed and the signal.
Another objective of the present invention is to provide a method for detecting a rotational speed of a fan based on a server, the method comprising the following steps:
the first fan rotating speed detecting unit acquires a first rotating speed parameter of a current fan by utilizing a positive piezoelectric effect and sends the acquired first rotating speed parameter to the fan rotating speed comparing unit;
the second fan rotating speed detecting unit acquires a second rotating speed parameter of the fan from a Hall assembly arranged on the fan body and sends the acquired second rotating speed parameter to the fan rotating speed comparing unit;
the fan rotating speed comparison unit compares a first rotating speed parameter sent by the first fan rotating speed detection unit and a second rotating speed parameter sent by the second fan rotating speed detection unit, which are received at the same moment, to judge whether the first rotating speed parameter and the second rotating speed parameter are equal, if the first rotating speed parameter and the second rotating speed parameter are equal, the Hall assembly on the fan body works normally, and if the first rotating speed parameter and the second rotating speed parameter are not equal, the Hall assembly on the fan body works abnormally.
As an improved scheme, the step of acquiring a first rotation speed parameter of a current fan by the first fan rotation speed detecting unit using a direct piezoelectric effect, and sending the acquired first rotation speed parameter to the fan rotation speed comparing unit specifically includes the following steps:
the piezoelectric voltage detection circuit detects the rotating speed of the fan to obtain a voltage signal converted from mechanical energy;
the voltage signal comparison module acquires a first rotating speed parameter of the current fan corresponding to the voltage signal according to a fan rotating speed and voltage signal comparison table stored in a database;
and the first rotating speed parameter sending module sends the acquired first rotating speed parameter to the fan rotating speed comparing unit.
As an improved scheme, the piezoelectric voltage detection circuit comprises a loop consisting of a piezoelectric sheet, an output capacitor C1 and a three-purpose meter, wherein:
the piezoelectric plate is arranged in the air supply range of the fan, the electric polarization direction of the piezoelectric plate is parallel to the air blowing direction of the fan, the body length of the piezoelectric plate deforms under the action of the wind force of the fan, and the deformation of the piezoelectric plate is controlled to accumulate electric energy on the output capacitor C1;
the output capacitor C1 is used for accumulating the electric energy generated when the piezoelectric sheet deforms;
the three-purpose electric meter is used for measuring the accumulated electric energy of the output capacitor C1 and feeding back the measured voltage signal to the voltage signal comparison module.
As an improvement, the method further comprises the steps of:
the fan rotating speed and voltage signal comparison table generation module is used for controlling the piezoelectric effect of the piezoelectric sheet to be learned, and a corresponding relation is established between the fan rotating speed and the voltage signal, wherein a linear relation exists between the fan rotating speed and the signal.
In the embodiment of the invention, the server-based fan rotation speed detection device comprises a first fan rotation speed detection unit, a second fan rotation speed detection unit and a fan rotation speed comparison unit, wherein the first fan rotation speed detection unit acquires a first rotation speed parameter of the current fan by utilizing a positive piezoelectric effect; the second fan rotating speed detecting unit acquires a second rotating speed parameter of the fan from a Hall assembly arranged on the fan body; the fan rotating speed comparison unit compares a first rotating speed parameter sent by the first fan rotating speed detection unit and a second rotating speed parameter sent by the second fan rotating speed detection unit, which are received at the same moment, to judge whether the first rotating speed parameter and the second rotating speed parameter are equal, when the first rotating speed parameter and the second rotating speed parameter are equal, the Hall assembly on the fan body works normally, and when the first rotating speed parameter and the second rotating speed parameter are not equal, the Hall assembly on the fan body works abnormally, so that the fan error judgment caused by the fact that the fan body returns a wrong TACH value is avoided, and the stable operation of the fan and the server is guaranteed.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a block diagram of a server-based fan speed detection apparatus according to the present invention:
FIG. 2 is a diagram illustrating a linear relationship between a fan speed and a voltage signal according to the present invention;
FIG. 3 is a schematic diagram of a piezoelectric voltage detection circuit according to the present invention;
FIG. 4 is a flow chart illustrating an implementation of the method for detecting a rotational speed of a server-based fan according to the present invention;
fig. 5 is a flow chart of the first fan rotation speed detecting unit provided by the present invention, which is implemented by obtaining a first rotation speed parameter of a current fan by using a direct piezoelectric effect and sending the obtained first rotation speed parameter to the fan rotation speed comparing unit.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are merely for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
Fig. 1 is a block diagram illustrating a structure of a server-based fan speed detection apparatus according to the present invention, and for convenience of description, only the relevant portions of the server-based fan speed detection apparatus according to the present invention are shown.
The fan speed detection device based on the server comprises a first fan speed detection unit, a second fan speed detection unit and a fan speed comparison unit, wherein:
the first fan rotating speed detecting unit is used for acquiring a first rotating speed parameter of the current fan by utilizing a positive piezoelectric effect and sending the acquired first rotating speed parameter to the fan rotating speed comparing unit;
the second fan rotating speed detecting unit is used for acquiring a second rotating speed parameter of the fan from a Hall assembly arranged on the fan body and sending the acquired second rotating speed parameter to the fan rotating speed comparing unit;
and the fan rotating speed comparison unit is respectively connected with the first fan rotating speed detection unit and the second fan rotating speed detection unit and is used for comparing a first rotating speed parameter sent by the first fan rotating speed detection unit and a second rotating speed parameter sent by the second fan rotating speed detection unit which are received at the same moment, judging whether the first rotating speed parameter and the second rotating speed parameter are equal, judging that the Hall assembly on the fan body works normally when the first rotating speed parameter and the second rotating speed parameter are equal, and judging that the Hall assembly on the fan body works abnormally when the first rotating speed parameter and the second rotating speed parameter are not equal.
In this embodiment, the piezoelectric effect (piezo electric) is a phenomenon of mechanical energy and electrical energy interchange in the dielectric material, and can be divided into two types, i.e. positive piezoelectric effect and inverse piezoelectric effect. The direct piezoelectric effect means that the piezoelectric material is electrically polarized under the action of external mechanical force, and binding charges with opposite signs appear in the surfaces of two ends of the piezoelectric material, and the charge density of the binding charges is in direct proportion to the external mechanical force. The direct piezoelectric effect is essentially the process of converting mechanical energy into electrical energy.
In an embodiment of the present invention, with reference to fig. 1, the first fan speed detecting unit specifically includes:
the piezoelectric voltage detection circuit is used for detecting the rotating speed of the fan and acquiring a voltage signal converted from mechanical energy;
the voltage signal comparison module is used for acquiring a first rotating speed parameter of the current fan corresponding to the voltage signal according to the fan rotating speed and voltage signal comparison table stored in the database;
the first rotating speed parameter sending module is used for sending the obtained first rotating speed parameter to the fan rotating speed comparing unit;
and the database is used for storing a pre-configured comparison table of the fan rotating speed and the voltage signal.
Wherein, the first fan speed detecting unit further comprises:
and the fan rotating speed and voltage signal comparison table generation module is used for controlling the learning of the piezoelectric effect of the piezoelectric sheet and establishing a corresponding relation between the fan rotating speed and the voltage signal, wherein a linear relation exists between the fan rotating speed and the signal, as shown in fig. 2, the abscissa represents the fan rotating speed gear, and the ordinate represents the voltage signal size, and other forms are certainly possible, and are not repeated herein.
In the embodiment of the present invention, as shown in fig. 3, the piezoelectric voltage detecting circuit includes a loop composed of a piezoelectric sheet, an output capacitor C1 and a three-purpose meter, wherein:
the piezoelectric plate is arranged in the air supply range of the fan, the electric polarization direction of the piezoelectric plate is parallel to the air blowing direction of the fan, the body length of the piezoelectric plate deforms under the action of the wind force of the fan, and the deformation of the piezoelectric plate is controlled to accumulate electric energy on the output capacitor C1;
the output capacitor C1 is used for accumulating the electric energy generated when the piezoelectric sheet deforms;
the three-purpose electric meter is used for measuring the accumulated electric energy of the output capacitor C1 and feeding back the measured voltage signal to the voltage signal comparison module.
In this embodiment, the piezoelectric voltage detection circuit further includes a voltage stabilizing circuit and a filter circuit;
the voltage stabilizing circuit comprises a diode D1 and a diode D2 which are connected in series, and the filter circuit comprises a capacitor C2 which is connected in parallel at two ends of the electricity meter.
Of course, the piezoelectric voltage detection circuit may further include other components, which are not described herein.
Fig. 4 is a flowchart illustrating an implementation of the server-based fan speed detection method according to the present invention, which specifically includes the following steps:
in step S101, a first fan speed detection unit obtains a first speed parameter of a current fan by using a direct piezoelectric effect, and sends the obtained first speed parameter to a fan speed comparison unit;
in step S102, the second fan speed detection unit obtains a second speed parameter of the fan from a hall element disposed on the fan body, and sends the obtained second speed parameter to the fan speed comparison unit;
in step S103, the fan speed comparing unit compares the first speed parameter sent by the first fan speed detecting unit and the second speed parameter sent by the second fan speed detecting unit, which are received at the same time, to determine whether the two are equal to each other, and when the two are equal to each other, it determines that the hall element on the fan body is working normally, and when the two are not equal to each other, it determines that the hall element on the fan body is working abnormally.
In the embodiment of the present invention, as shown in fig. 5, the step of acquiring a first rotation speed parameter of a current fan by a first fan rotation speed detection unit using a positive piezoelectric effect, and sending the acquired first rotation speed parameter to the fan rotation speed comparison unit specifically includes the following steps:
in step S201, the piezoelectric voltage detection circuit detects the rotation speed of the fan to obtain a voltage signal converted from mechanical energy;
in step S202, the voltage signal comparison module obtains a first rotation speed parameter of the current fan corresponding to the voltage signal according to a fan rotation speed and voltage signal comparison table stored in a database;
in step S203, the first rotation speed parameter sending module sends the acquired first rotation speed parameter to the fan rotation speed comparing unit.
In this embodiment, the following steps need to be executed before the above step S201 is executed:
the fan rotating speed and voltage signal comparison table generation module is used for controlling the piezoelectric effect of the piezoelectric sheet to be learned, and a corresponding relation is established between the fan rotating speed and the voltage signal, wherein a linear relation exists between the fan rotating speed and the signal.
The learning process is similar to a common intelligent learning process, and is not described herein again.
In the embodiment of the invention, the server-based fan rotation speed detection device comprises a first fan rotation speed detection unit, a second fan rotation speed detection unit and a fan rotation speed comparison unit, wherein the first fan rotation speed detection unit acquires a first rotation speed parameter of the current fan by utilizing a positive piezoelectric effect; the second fan rotating speed detecting unit acquires a second rotating speed parameter of the fan from a Hall assembly arranged on the fan body; the fan rotating speed comparison unit compares a first rotating speed parameter sent by the first fan rotating speed detection unit and a second rotating speed parameter sent by the second fan rotating speed detection unit, which are received at the same moment, to judge whether the first rotating speed parameter and the second rotating speed parameter are equal, when the first rotating speed parameter and the second rotating speed parameter are equal, the Hall assembly on the fan body works normally, and when the first rotating speed parameter and the second rotating speed parameter are not equal, the Hall assembly on the fan body works abnormally, so that the fan error judgment caused by the fact that the fan body returns a wrong TACH value is avoided, and the stable operation of the fan and the server is guaranteed.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (9)
1. A fan speed detection device based on a server is characterized by comprising a first fan speed detection unit, a second fan speed detection unit and a fan speed comparison unit, wherein:
the first fan rotating speed detecting unit is used for acquiring a first rotating speed parameter of the current fan by utilizing a positive piezoelectric effect and sending the acquired first rotating speed parameter to the fan rotating speed comparing unit;
the second fan rotating speed detecting unit is used for acquiring a second rotating speed parameter of the fan from a Hall assembly arranged on the fan body and sending the acquired second rotating speed parameter to the fan rotating speed comparing unit;
the fan rotating speed comparison unit is respectively connected with the first fan rotating speed detection unit and the second fan rotating speed detection unit, and is used for comparing a first rotating speed parameter sent by the first fan rotating speed detection unit and a second rotating speed parameter sent by the second fan rotating speed detection unit which are received at the same moment, judging whether the first rotating speed parameter and the second rotating speed parameter are equal, judging that the Hall assembly on the fan body works normally when the first rotating speed parameter and the second rotating speed parameter are equal, and judging that the Hall assembly on the fan body works abnormally when the first rotating speed parameter and the second rotating speed parameter are not equal.
2. The server-based fan speed detection apparatus according to claim 1, wherein the first fan speed detection unit comprises:
the piezoelectric voltage detection circuit is used for detecting the rotating speed of the fan and acquiring a voltage signal converted from mechanical energy;
the voltage signal comparison module is used for acquiring a first rotating speed parameter of the current fan corresponding to the voltage signal according to the fan rotating speed and voltage signal comparison table stored in the database;
the first rotating speed parameter sending module is used for sending the obtained first rotating speed parameter to the fan rotating speed comparing unit;
and the database is used for storing a pre-configured comparison table of the rotating speed of the fan and the voltage signal.
3. The apparatus as claimed in claim 2, wherein the piezoelectric voltage detection circuit comprises a circuit consisting of a piezoelectric plate, an output capacitor C1 and a three-way meter, wherein:
the piezoelectric plate is arranged in the air supply range of the fan, the electric polarization direction of the piezoelectric plate is parallel to the air blowing direction of the fan, the body length of the piezoelectric plate deforms under the action of the wind force of the fan, and the deformation of the piezoelectric plate is controlled to accumulate electric energy on the output capacitor C1;
the output capacitor C1 is used for accumulating the electric energy generated when the piezoelectric sheet deforms;
the three-purpose electric meter is used for measuring the accumulated electric energy of the output capacitor C1 and feeding back the measured voltage signal to the voltage signal comparison module.
4. The server-based fan speed detecting device as claimed in claim 3, wherein the piezoelectric voltage detecting circuit further comprises a voltage stabilizing circuit and a filter circuit;
the voltage stabilizing circuit comprises a diode D1 and a diode D2 which are connected in series, and the filter circuit comprises a capacitor C2 which is connected in parallel at two ends of the electricity meter.
5. The server-based fan speed detecting device as claimed in claim 3, wherein the first fan speed detecting unit further comprises:
and the fan rotating speed and voltage signal comparison table generation module is used for controlling the learning of the piezoelectric effect of the piezoelectric sheet and establishing a corresponding relation between the fan rotating speed and the voltage signal, wherein a linear relation exists between the fan rotating speed and the signal.
6. A fan rotating speed detection method based on a server is characterized by comprising the following steps:
the first fan rotating speed detecting unit acquires a first rotating speed parameter of a current fan by utilizing a positive piezoelectric effect and sends the acquired first rotating speed parameter to the fan rotating speed comparing unit;
the second fan rotating speed detecting unit acquires a second rotating speed parameter of the fan from a Hall assembly arranged on the fan body and sends the acquired second rotating speed parameter to the fan rotating speed comparing unit;
the fan rotating speed comparison unit compares a first rotating speed parameter sent by the first fan rotating speed detection unit and a second rotating speed parameter sent by the second fan rotating speed detection unit, which are received at the same moment, to judge whether the first rotating speed parameter and the second rotating speed parameter are equal, if the first rotating speed parameter and the second rotating speed parameter are equal, the Hall assembly on the fan body works normally, and if the first rotating speed parameter and the second rotating speed parameter are not equal, the Hall assembly on the fan body works abnormally.
7. The method as claimed in claim 6, wherein the step of the first fan speed detecting unit obtaining a first speed parameter of a current fan by using a direct piezoelectric effect, and sending the obtained first speed parameter to the fan speed comparing unit includes the following steps:
the piezoelectric voltage detection circuit detects the rotating speed of the fan to obtain a voltage signal converted from mechanical energy;
the voltage signal comparison module acquires a first rotating speed parameter of the current fan corresponding to the voltage signal according to a fan rotating speed and voltage signal comparison table stored in a database;
and the first rotating speed parameter sending module sends the acquired first rotating speed parameter to the fan rotating speed comparing unit.
8. The method as claimed in claim 7, wherein the piezoelectric voltage detection circuit comprises a circuit consisting of a piezoelectric plate, an output capacitor C1 and a three-way meter, wherein:
the piezoelectric plate is arranged in the air supply range of the fan, the electric polarization direction of the piezoelectric plate is parallel to the air blowing direction of the fan, the body length of the piezoelectric plate deforms under the action of the wind force of the fan, and the deformation of the piezoelectric plate is controlled to accumulate electric energy on the output capacitor C1;
the output capacitor C1 is used for accumulating the electric energy generated when the piezoelectric sheet deforms;
the three-purpose electric meter is used for measuring the accumulated electric energy of the output capacitor C1 and feeding back the measured voltage signal to the voltage signal comparison module.
9. The method as claimed in claim 8, further comprising the steps of:
the fan rotating speed and voltage signal comparison table generation module is used for controlling the piezoelectric effect of the piezoelectric sheet to be learned, and a corresponding relation is established between the fan rotating speed and the voltage signal, wherein a linear relation exists between the fan rotating speed and the signal.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112129214A (en) * | 2020-09-06 | 2020-12-25 | 苏州浪潮智能科技有限公司 | Circuit and method for real-time detection of case bending |
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| CN112129214A (en) * | 2020-09-06 | 2020-12-25 | 苏州浪潮智能科技有限公司 | Circuit and method for real-time detection of case bending |
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