CN112986606B - Fan speed and acceleration tester - Google Patents
Fan speed and acceleration tester Download PDFInfo
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- CN112986606B CN112986606B CN202110267064.8A CN202110267064A CN112986606B CN 112986606 B CN112986606 B CN 112986606B CN 202110267064 A CN202110267064 A CN 202110267064A CN 112986606 B CN112986606 B CN 112986606B
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/36—Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The utility model belongs to the technical field of measuring instruments, and particularly relates to a fan speed and acceleration tester; the utility model comprises a mounting component detachably mounted on a shaft body at the front end of a fan shaft, a detection component arranged on the mounting component and a receiving component arranged right in front of an air outlet of a fan to be tested, wherein the mounting component comprises a pair of fixed hoops and a fixed component for fixing the two fixed hoops; the utility model can effectively solve the problems of inconvenient use, poor measurement precision and the like in the prior art.
Description
Technical Field
The utility model relates to the technical field of measuring instruments, in particular to a fan speed and acceleration tester.
Background
With the rapid development of economy, the fan is widely applied to various fields of economic production and life, the rotation speed measurement of the fan is particularly important, the rotation speed of the fan can be monitored to determine whether equipment needs to be overhauled and replaced, and the running condition of the fan is effectively monitored.
The application number is: the patent document of CN201920318449.0 discloses a fan speed measuring device, which comprises a gear which is sleeved on a main shaft and synchronously rotates along with the main shaft, and a fixing frame which is fixedly connected with a bearing seat and is arranged outside the gear, wherein a speed measuring probe for measuring the rotating speed of the gear is arranged on the fixing frame, and the speed measuring probe is connected with a controller. The speed measuring probe is fixed, the gear rotates under the drive of the main shaft, the measuring probe sends the measured data to the controller to obtain the rotating speed of the gear, and the fan speed measuring device is arranged on the main shaft of the fan and can directly measure the rotating speed of the main shaft of the fan in real time.
However, it has the following disadvantages in practical use:
firstly, it is inconvenient to use, because it needs to carry out the dismantlement and the installation of many parts (can also cause the damage even to the fan body that awaits measuring) to the fan that awaits measuring this makes the user to carry out these complicated dismantlement and installation steps before measuring the speed to other fans that await measuring, greatly reduced work efficiency.
Secondly, the measurement accuracy is poor, and because the sample parameters which can be selected for measuring the rotating speed of the fan to be measured are single, the measurement result has larger fixing error; meanwhile, the method is not beneficial to users to effectively find out whether the speed measuring device has faults or not in time, so that the reliability is reduced.
Disclosure of Invention
The present utility model aims to solve the drawbacks of the prior art and to solve the problems set forth in the background art.
In order to achieve the above purpose, the present utility model adopts the following technical scheme: a fan speed and acceleration tester comprises a mounting component detachably mounted on a shaft body at the front end of a fan shaft, a detection component arranged on the mounting component and a receiving component arranged right in front of an air outlet of a fan to be tested;
the mounting assembly comprises a pair of semicircular fixing hoops which are matched with the fan shaft in size and a fixing assembly used for fixing the two fixing hoops;
the detection assembly comprises a laser emitter, a PCB (printed circuit board), a battery, a voltage-variable resistor and a pressure sensor, wherein the laser emitter is fixed in the middle of the outer ring side wall of the fixed hoop, the laser emitting direction of the laser emitter is parallel to the central axis of the fixed hoop, a containing cavity is formed in the laser emitter shell near the bottom end of the laser emitter shell, a columnar groove is formed in the inner wall of the top end of the containing cavity, the PCB is fixedly arranged in the containing cavity, the pressure sensor is fixedly arranged on the bottom wall of the columnar groove, the voltage-variable resistor is arranged on the surface of the pressure sensor, and the battery is slidably connected in the columnar groove;
the receiving assembly comprises a base, a laser receiver and an illumination intensity sensor, wherein the laser receiver and the illumination intensity sensor are arranged on the base through the adjusting assembly;
the laser receiver and the illumination intensity sensor are both powered by an external power source and controlled by an external computer.
Further, wing plates are arranged at two ends of the fixing hoop, regular polygonal grooves are formed in the outer surfaces of the wing plates, and coaxial and smooth through grooves penetrate through the middle of the bottom wall of the first groove; the fixing assembly comprises a fixing bolt, an outer nut, an inner nut and a limit bolt, wherein the radius of the bolt body of the fixing bolt is equal to that of the through groove, the shape and the size of the head of the fixing bolt are the same as those of the groove, a first spiral groove which is coaxial with the fixing bolt and matched with the limit bolt can be formed in the surface wall of the bottom end of the fixing bolt, the shape and the size of the outer edge of the outer nut are the same as those of the groove, the inner nut which is coaxial is rotationally connected to the inner ring side wall of the outer nut, a second spiral groove which is matched with the bolt body of the fixing bolt is penetrated on the inner nut, and the radius of the head of the limit bolt is larger than that of the second spiral groove; and the fixed hoop is also provided with an adsorption component.
Furthermore, the bottom wall of the inner nut is also provided with a regular polygon interface groove; the fin plates at two ends of the fixing hoops are respectively subjected to different rounding treatments, the sections at the edges of the two fin plates at the same end after the two fixing hoops are fixed by the fixing component are in complete and continuous quarter-round shapes to one third-round shapes, and the fin plates at two ends of the two fixing hoops after the two fixing hoops are fixed by the fixing component are in point symmetry relation with the circle center of the fixing hoops; the adsorption component comprises a group of suckers uniformly arranged on the inner ring side wall of the fixed hoop and a manual component arranged on the outer ring side wall of the fixed hoop, wherein matched cavities are formed in the fixed hoop, and the suckers are communicated with the cavities in the fixed hoop.
Still further, manual subassembly includes the air duct that sets up on the outer loop lateral wall of fixed hoop and sets up the manual valve on the air duct, the air duct communicates the external and its inside cavity of fixed hoop that is located.
Further, one end of the laser transmitter shell far away from the fixed hoop is subjected to rounding treatment, and the arc edges of the two fin plates on the laser transmitter shell and the fixed hoop where the laser transmitter shell is positioned are identical in rotation direction; and the manual assembly on the fixed hoop is arranged at the back end of the laser generator shell in the rotating direction.
Further, a control button electrically connected with the control board is arranged on the laser transmitter, a limit ring matched with a battery is arranged at the position, close to the notch, of the columnar groove, the battery can only move along the axis direction of the battery in the columnar groove, and the maximum distance of the movement is equal to the maximum deformation range of the piezoresistor; the battery is a wirelessly rechargeable battery.
Still further, mainly be equipped with processing module, storage module and wireless module on the PCB board, the PCB board passes through wireless module and external computer signal connection.
Further, the adjusting component comprises a vertical telescopic rod arranged at the top end of the base, a corner table arranged at the end part of the top end of the vertical telescopic rod and two horizontal telescopic rods symmetrically arranged at two transverse ends of the corner table; the laser receiver and the illumination intensity sensor are respectively arranged at the end parts of the free ends of the two horizontal telescopic rods.
Furthermore, a layer of anti-slip pad body matched with the base is arranged at the bottom of the base, a group of electric telescopic rods are symmetrically arranged on the outer side wall of the base, the telescopic direction of each electric telescopic rod is vertically downward, universal wheels are arranged at the end parts of the free ends of the electric telescopic rods, and in a fully contracted state, the universal wheels are not contacted with the ground; the electric telescopic rods are powered by an external power supply and controlled by an external computer.
Furthermore, the vertical telescopic rod and the horizontal telescopic rod are both pre-filled with magnetic fluid solution, a first electromagnet is arranged in the base close to the bottom end of the vertical telescopic rod, a second electromagnet matched with the first electromagnet is arranged between the free end of the vertical telescopic rod and the corner table, and a third electromagnet is arranged on one side, close to the outer side wall, of the horizontal telescopic rod in the corner table; the first electromagnet, the second electromagnet and the third electromagnet are powered by an external power supply and controlled by an external computer.
Compared with the prior art, the utility model has the advantages and positive effects that,
1. according to the utility model, through adding the mounting component detachably mounted on the shaft body at the front end of the fan shaft, the detection component arranged on the mounting component and the receiving component arranged right in front of the air outlet of the fan to be tested, the receiving component is powered by an external power supply and controlled by an external computer, and the detection component is controlled by the external computer in a wireless transmission mode. Therefore, a user only needs to detach the housing at the front end of the fan to be tested, then fix the mounting assembly on the shaft body at the front end of the fan shaft, then place the receiving assembly right in front of the air outlet of the fan to be tested, and finally carry out accurate measurement work through an external computer. The utility model can effectively improve the convenience and safety of the product in actual use and can not damage the fan body to be tested.
2. According to the utility model, the installation component, the detection component and the receiving component are added, wherein the detection component comprises a laser emitter, a PCB (printed circuit board), a battery, a voltage-variable resistor and a pressure sensor, the laser emitter is fixed in the middle of the outer ring side wall of the fixed hoop, the laser emitting direction of the laser emitter is parallel to the central axis of the fixed hoop, a containing cavity is formed in the laser emitter shell close to the inner part of the bottom end of the laser emitter shell, a cylindrical groove is formed in the inner wall of the top end of the containing cavity, the PCB is fixedly arranged in the containing cavity, the pressure sensor is fixedly arranged on the bottom wall of the cylindrical groove, the voltage-variable resistor is arranged on the surface of the pressure sensor, and the battery is slidingly connected in the cylindrical groove. Thus, the device provided by the utility model has three independent target parameter sources for measuring the rotating speed of the fan to be measured: first, the laser receiver receives the signal interval of the laser transmitter; secondly, the illumination intensity sensor detects the brightness of laser emitted by the laser emitter; thirdly, monitoring a value on the pressure sensor in real time; the three target parameter sources can independently calculate the rotating speed of the fan to be measured, and finally, an external computer is used for comprehensive treatment so as to obtain more accurate measurement data; meanwhile, when any one target parameter source is problematic, the other two target parameter sources are not affected. The utility model can effectively improve the accuracy and reliability of the speed and acceleration measurement result of the fan to be measured.
Drawings
FIG. 1 is a pictorial view of a mounting assembly, a detection assembly and a receiving assembly at a first viewing angle in accordance with the present utility model;
FIG. 2 is an exploded view of the mounting assembly at a second perspective of the present utility model;
FIG. 3 is an exploded view of the securing assembly at a third perspective in accordance with the present utility model;
FIG. 4 is an exploded view of the inner and outer nuts and an exploded view of the inner and outer nuts partially sectioned, in a fourth view of the present utility model;
FIG. 5 is a cross-sectional view, partially in section, of the fixation clamp of the present utility model;
FIG. 6 is a schematic view of the internal structure of the laser transmitter housing of the fifth view of the present utility model, partially in section;
FIG. 7 is an exploded view of the laser transmitter housing of the present utility model with portions broken away and with its internal components at a sixth view angle;
FIG. 8 is a partially exploded view of the receiving assembly and the adjustment assembly at a seventh perspective of the present utility model;
FIG. 9 is a pictorial view, partially in section, of a base at an eighth view angle in accordance with the present utility model;
FIG. 10 is an exploded view of a third electromagnet of the corner table of the ninth view, partially in section, with the third electromagnet inside the corner table of the ninth view;
FIG. 11 is a view of the present utility model in use from a tenth perspective;
fig. 12 is an enlarged view of area a in fig. 2.
Legend description:
1-a fan shaft; 2-a fan to be tested; 3-fixing hoops; 4-a laser emitter; 5-a PCB board; 6-cell; 7-a voltage-dependent resistor; 8-a pressure sensor; 9-a containing cavity; 10-columnar grooves; 11-a base; 12-a laser receiver; 13-an illumination intensity sensor; 14-fin plates; 15-grooves; 16-through grooves; 17-fixing bolts; 18-an outer nut; 19-an inner nut; 20-limiting bolts; 21-a first groove; 22-a second groove; 23-interface slots; 24-sucking disc; 25-cavity; 26-an airway; 27-a manual valve; 28-control buttons; 29-limiting rings; 30-a vertical telescopic rod; 31-corner stand; 32-a horizontal telescopic rod; 33-a non-slip mat body; 34-an electric telescopic rod; 35-universal wheels; 36-a first electromagnet; 37-a second electromagnet; 38-a third electromagnet; 39-a processing module; 40-a memory module; 41-wireless module.
Detailed Description
In order that the above objects, features and advantages of the utility model will be more clearly understood, a further description of the utility model will be rendered by reference to the appended drawings and examples. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, however, the present utility model may be practiced otherwise than as described herein, and therefore the present utility model is not limited to the specific embodiments of the disclosure that follow.
A fan speed and acceleration tester of the present embodiment refers to fig. 1 to 12: the device comprises a mounting component detachably mounted on a shaft body at the front end of a fan shaft 1, a detection component arranged on the mounting component and a receiving component arranged right in front of an air outlet of a fan 2 to be detected.
The mounting assembly includes a pair of fixing hoops 3 having a semicircular shape and a size matching the fan shaft 1, and a fixing assembly for fixing the two fixing hoops 3.
The detection component comprises a laser emitter 4, a PCB (printed circuit board) 5, a battery 6, a voltage transformation resistor 7 and a pressure sensor 8, wherein the laser emitter 4 is fixed at the middle part of the outer ring side wall of the fixed hoop 3, the laser emitting direction of the laser emitter 4 is parallel to the central axis of the fixed hoop 3, a containing cavity 9 is formed in the shell of the laser emitter 4 near the bottom end of the shell, a columnar groove 10 is formed in the inner wall of the top end of the containing cavity 9, the PCB 5 is fixedly arranged in the containing cavity 9, the pressure sensor 8 is fixedly arranged on the bottom wall of the columnar groove 10, the voltage transformation resistor 7 is arranged on the surface of the pressure sensor 8, and the battery 6 is slidingly connected in the columnar groove 10.
It is noted that the central axis of the cylindrical groove 10 is perpendicular to the central axis of the fixing collar 3 in this embodiment.
The receiving assembly comprises a base 11 and a laser receiver 12, an illumination intensity sensor 1413 arranged on the base 11 by an adjustment assembly.
The laser receiver 12 and the illumination intensity sensor 1413 are both powered by an external power source and controlled by an external computer.
The both ends of fixed hoop 3 all are equipped with the fin, regular polygon's recess 15 has all been seted up to the surface of fin, and the diapire middle part of first recess 15 all runs through coaxial and smooth logical groove 16.
The fixing assembly comprises a fixing bolt 17, an outer nut 18, an inner nut 19 and a limit bolt 20, wherein the radius of a bolt body of the fixing bolt 17 is equal to that of the through groove 16, the shape and the size of the head of the fixing bolt 17 are the same as those of the groove 15, a first screw groove 21 which is coaxial with the fixing bolt 17 and matched with the limit bolt 20 can be formed in the surface wall of the bottom end of the fixing bolt 17, the shape and the size of the outer edge of the outer nut 18 are the same as those of the groove 15, the inner nut 19 which is coaxial is rotationally connected to the inner ring side wall of the outer nut 18, a second screw groove 22 which is matched with the bolt body of the fixing bolt 17 is penetrated through the inner nut 19, and the radius of the head of the limit bolt 20 is larger than that of the second screw groove 22; this allows the two fixing bands 3 to be stably and reliably fixed to the shaft body at the front end of the fan shaft 1.
The fixed hoop 3 is also provided with an adsorption component.
The bottom wall of the inner nut 19 is also provided with a regular polygon interface groove 23, so that a user can screw and fix the inner nut 19, the outer nut 18 and the fixing bolt 17 by a spanner matched with the interface groove 23
The fin plates at two ends of the fixing hoops 3 are respectively subjected to different rounding treatments, the sections at the edges of the two fin plates at the same end after the two fixing hoops 3 are fixed by the fixing component are in complete and continuous quarter round shapes, and the fin plates at two ends of the two fixing hoops 3 are in point symmetry relation with respect to the circle center of the fixing hoops 3 after the two fixing hoops 3 are fixed by the fixing component, so that the air resistance of the fin plates can be reduced, and the influence on normal rotation of a fan is reduced.
The adsorption component comprises a group of suckers 24 uniformly arranged on the inner ring side wall of the fixed hoop 3 and a manual component arranged on the outer ring side wall of the fixed hoop 3, a matched cavity 25 is formed in the fixed hoop 3, the suckers 24 are communicated with the cavity 25 in the fixed hoop 3, so that the stability and reliability of the fixed hoop 3 fixed on the fan shaft 1 can be improved, and the fixed hoop 3 and the fan shaft 1 are kept relatively static.
The manual assembly comprises an air duct 26 arranged on the side wall of the outer ring of the fixed hoop 3 and a manual valve 27 arranged on the air duct 26, and the air duct 26 is communicated with the outside and a cavity 25 in the fixed hoop 3; the user can easily separate the suction cup 24 from the fan shaft 1 through the manual valve 27, so that the user can detach the fixing hoop 3 from the fan shaft 1 conveniently.
Notably, the manual valve 27 is a normally closed valve.
The end of the laser transmitter 4 shell far away from the fixed hoop 3 is subjected to rounding treatment, and the arc edges of the two fin plates on the laser transmitter 4 shell and the fixed hoop 3 where the laser transmitter 4 shell is positioned are identical in screwing direction; and the manual assembly on the fixed hoop 3 is arranged at the rear end of the rotation direction of the laser generator shell, so that the air resistance of the manual assembly and the detection assembly is reduced when the fan shaft 1 rotates, and the influence on the normal rotation of the fan is reduced.
The laser transmitter 4 is provided with a control button 28 electrically connected with the control board, the position of the columnar groove 10 close to the notch of the columnar groove is provided with a limiting ring 29 matched with the battery 6, the battery 6 can only move along the axis direction in the columnar groove 10, and the maximum distance of the movement is equal to the maximum deformation range of the voltage-variable resistor 7.
The battery 6 adopts the battery 6 which can be charged wirelessly, so that a corresponding charging interface is not required to be arranged on the shell of the laser transmitter 4, thereby further improving the low air resistance performance of the laser generator.
The PCB 5 is mainly provided with a processing module 39, a storage module 40 and a wireless module 41, the PCB 5 is connected with an external computer through the wireless module 41, and in the embodiment, the type of the wireless module 41 selects wifi, because the wireless module has the advantages of fast and stable data transmission and the like.
The adjusting assembly comprises a vertical telescopic rod 30 arranged at the top end of the base 11, a corner table 31 arranged at the top end of the vertical telescopic rod 30 and two horizontal telescopic rods 32 symmetrically arranged at two transverse ends of the corner table 31; the laser receiver 12 and the illumination intensity sensor 1413 are disposed at the ends of the free ends of the two horizontal telescopic links 32, respectively.
The bottom of base 11 is equipped with one deck and matches with it slipmat body 33 (can promote the stability that base 11 stopped in appointed position department like this), is equipped with a set of electric telescopic handle 34 on the lateral wall of base 11 symmetrically, and electric telescopic handle 34's flexible direction is perpendicular downwards, and electric telescopic handle 34 free end's tip all is equipped with universal wheel 35 to electric telescopic handle 34 is in under the complete shrink state, and universal wheel 35 does not contact with ground, so can the user easily remove base 11.
The motorized telescopic rods 34 are powered by an external power source and controlled by an external computer.
The vertical telescopic rod 30 and the horizontal telescopic rod 32 are both pre-filled with magnetic fluid solution, a first electromagnet 36 is arranged in the base 11 near the bottom end of the vertical telescopic rod 30, a second electromagnet 37 matched with the first electromagnet 36 is arranged between the free end of the vertical telescopic rod 30 and the corner table 31, and a third electromagnet 38 is arranged on one side, close to the outer side wall, of the horizontal telescopic rod 32, of the inside of the corner table 31.
Notably, the magnetic fluid solution consisted of water, glycerol and tiny carbonyl iron particles, the liquid composition of which was similar to milk, with fat droplets dispersed in the aqueous solution. When not exposed to a magnetic field, the material remains soft and pliable, however, upon application of the magnetic field, the droplets lengthen and the iron particles align themselves along the magnetic field lines. These two factors can result in a nearly 30-fold increase in material hardness. When the magnetic field is removed, the material returns to its original shape. This can effectively improve the stability and reliability of the vertical telescopic link 30 and the horizontal telescopic link 32, that is, the wind blown by the fan 2 to be tested does not shake the laser receiver 12 and the illumination intensity sensor 1413.
The first electromagnet 36, the second electromagnet 37 and the third electromagnet 38 are all powered by an external power source and controlled by an external computer.
It should be noted that the vertical telescopic rod 30 and the horizontal telescopic rod 32 may be electrically controlled in the present embodiment, and are not limited to manual control.
The working principle is as follows:
it should be noted that, in the present embodiment, the fan 2 to be tested is powered by an external power source and controlled by an external computer
The preparation process comprises the following steps:
first, a user removes a fan cover at the front end of the fan 2 to be tested.
In the second step, the user reliably and fixedly installs the fixing hoop 3 on the shaft body at the front end of the fan shaft 1 through the cooperation of the fixing component and the adsorption component (note that the lasers emitted by the two laser emitters 4 are required to be kept parallel to the central axis of the fan shaft 1 and point to the front end of the fan 2 to be tested).
Third, the user moves the receiving base 11 to a designated position and adjusts the vertical telescopic link 30 and the horizontal telescopic link 32 so that the lasers emitted from the two laser transmitters 4 can leave the opposite spots on the laser receiver 12 and the illumination intensity sensor 1413 when the fan shaft 1 rotates.
And fourthly, starting the first electromagnet 36, the second electromagnet 37 and the third electromagnets 38, wherein a unidirectional magnetic field is formed between the first electromagnet and the second electromagnet 37, and the magnetic field directions of the two third electromagnets 38 in the horizontal direction are the same.
Fifth, the user presses the control buttons 28 on the two laser transmitters 4, thereby causing the laser transmitters 4 to emit laser light.
The mounted state is shown in fig. 11.
First kind: the cooperation of the laser receiver 12 and the laser transmitter 4 measures the rotational speed of the fan 2 to be measured.
When the laser light emitted by the laser transmitter 4 is received at the laser receiver 12, the laser receiver 12 immediately transmits the signal to an external computer. Then, the external computer calculates the rotational speed and acceleration of the fan shaft 1 by processing a series of pulse signals sent from the laser receiver 12.
Note that there are two laser generators in the product of the utility model and the two are symmetrical, so the final calculation result of the external computer is twice the actual rotation speed of the fan shaft 1.
Second kind: the cooperation of the illumination intensity sensor 1413 and the laser transmitter 4 measures the rotational speed of the fan 2 to be measured.
Because the fan shaft 1 can extrude the piezoresistor 7 under the centrifugal effect when rotating, the piezoresistor 7 can receive deformation and change the resistance value at this moment to change the luminance that laser emitter 4 sent laser, the outside computer just can detect the change that laser emitter 4 sent laser luminance through illumination intensity sensor 1413 (piezoresistor 7 deformation and resistance value size relation can be known through the product manual table look-up) so as to calculate the rotational speed and the acceleration of fan shaft 1.
Note that there are two laser generators in the product of the utility model and the two are symmetrical, so the final calculation result of the external computer is twice the actual rotation speed of the fan shaft 1.
Third kind: the pressure sensor 8 measures the rotational speed of the fan 2 to be measured.
Because the battery 6 and the piezoresistor 7 fixed at the tail of the battery 6 in the cylindrical groove 10 are acted by centrifugal force when the fan shaft 1 rotates, corresponding force is applied to the pressure sensor 8, the processing module 39 reads the value on the pressure sensor 8 in real time, and the value on the pressure sensor 8 is transmitted to an external computer through the wireless module 41, and the external computer reversely calculates the rotating speed and the acceleration of the fan shaft 1 through the mass of the battery 6, the mass of the piezoresistor 7 and the value of the rotating radius thereof.
Finally, the external computer synthesizes the three calculation results, so that more accurate measurement data is obtained.
The present utility model is not limited to the above-mentioned embodiments, and any equivalent embodiments which can be changed or modified by the technical content disclosed above can be applied to other fields, but any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical substance of the present utility model without departing from the technical content of the present utility model still belong to the protection scope of the technical solution of the present utility model.
Claims (9)
1. A fan speed and acceleration tester, its characterized in that: the device comprises a mounting component detachably mounted on a front end shaft body of a fan shaft (1), a detection component arranged on the mounting component and a receiving component arranged right in front of an air outlet of a fan (2) to be detected;
the mounting assembly comprises a pair of semicircular fixing hoops (3) which are matched with the fan shaft (1) in size and a fixing assembly used for fixing the two fixing hoops (3);
the detection assembly comprises a laser emitter (4), a PCB (printed circuit board) (5), a battery (6), a pressure variable resistor (7) and a pressure sensor (8), wherein the laser emitter (4) is fixed at the middle part of the outer ring side wall of the fixed hoop (3), the laser emitting direction of the laser emitter (4) is parallel to the central axis of the fixed hoop (3), a containing cavity (9) is formed in the shell of the laser emitter (4) close to the inner part of the bottom end of the shell, a columnar groove (10) is formed in the inner wall of the top end of the containing cavity (9), the PCB (5) is fixedly arranged in the containing cavity (9), the pressure variable resistor (7) is fixedly arranged on the bottom wall of the columnar groove (10), the pressure variable resistor (7) is arranged on the surface of the pressure sensor (8), and the battery (6) is slidingly connected in the columnar groove (10). The PCB (5) is mainly provided with a processing module (39), a storage module (40) and a wireless module (41), and the PCB (5) is in signal connection with an external computer through the wireless module (41);
the receiving assembly comprises a base (11), and a laser receiver (12) and an illumination intensity sensor (13) which are arranged on the base (11) through an adjusting assembly;
the laser receiver (12) and the illumination intensity sensor (13) are both powered by an external power supply and controlled by an external computer;
the fan speed and acceleration are measured in three detection modes to obtain three calculation results, and the three calculation results are comprehensively obtained by a computer; firstly, measuring the rotating speed and the acceleration of a fan (2) to be measured by matching a laser receiver (12) with a laser transmitter (4); secondly, the rotation speed and the acceleration of the fan (2) to be measured are measured by the cooperation of the illumination intensity sensor (13) and the laser emitter (4), namely, when the fan shaft (1) rotates, the battery (6) extrudes the voltage-variable resistor (7) under the centrifugal action, and the voltage-variable resistor (7) is deformed to change the resistance value, so that the brightness of laser emitted by the laser emitter (4) is changed, and an external computer can detect the change of the brightness of the laser emitted by the laser emitter (4) through the illumination intensity sensor (13); thirdly, the pressure sensor (8) measures the rotating speed and the acceleration of the fan (2) to be measured, namely, when the fan shaft (1) rotates, the battery (6) in the columnar groove (10) and the pressure variable resistor (7) fixed at the tail part of the battery can be acted by centrifugal force, so that corresponding force is applied to the pressure sensor (8), and the processing module reads the numerical value on the pressure sensor (8) in real time.
2. The fan speed and acceleration tester according to claim 1, wherein the two ends of the fixing hoop (3) are provided with fin plates (14), the outer surfaces of the fin plates (14) are provided with regular polygonal grooves (15), and the middle parts of the bottom walls of the grooves (15) are provided with coaxial and smooth through grooves (16) in a penetrating manner; the fixing assembly comprises a fixing bolt (17), an outer nut (18), an inner nut (19) and a limit bolt (20), the radius of a bolt body of the fixing bolt (17) is equal to that of a through groove (16), the shape and the size of the head of the fixing bolt (17) are the same as those of a groove (15), a first screw groove (21) which is coaxial with the fixing bolt and matched with the limit bolt (20) can be formed in the surface wall of the bottom end of the fixing bolt (17), the shape and the size of the outer edge of the outer nut (18) are the same as those of the groove (15), the inner nut (19) which is coaxial is rotationally connected to the inner ring side wall of the outer nut (18), a second screw groove (22) which is matched with the bolt body of the fixing bolt (17) is penetrated on the inner nut (19), and the radius of the head of the limit bolt (20) is larger than that of the second screw groove (22). And the fixing hoop (3) is also provided with an adsorption component.
3. The fan speed and acceleration tester according to claim 2, characterized in that the bottom wall of the inner nut (19) is also provided with a regular polygon interface groove (23); the fin plates (14) at two ends of the fixing hoops (3) are respectively subjected to different rounding treatments, the cross sections at the edges of the two fin plates (14) at the same end after the two fixing hoops (3) are fixed by the fixing component are in complete and continuous quarter-circle shapes to one-third-circle shapes, and the fin plates (14) at two ends of the two fixing hoops (3) are in point symmetry relation with the circle center of the fixing hoops (3) after the two fixing hoops are fixed by the fixing component; the adsorption component comprises a group of suckers (24) uniformly arranged on the inner ring side wall of the fixed hoop (3) and a manual component arranged on the outer ring side wall of the fixed hoop (3), a matched cavity (25) is formed in the fixed hoop (3), and the suckers (24) are communicated with the cavity (25) in the fixed hoop (3) where the suckers are located.
4. A fan speed and acceleration tester according to claim 3, characterized in that the manual assembly comprises an air duct (26) arranged on the side wall of the outer ring of the fixed hoop (3) and a manual valve (27) arranged on the air duct (26), wherein the air duct (26) is communicated with the outside and a cavity (25) inside the fixed hoop (3) where the air duct is arranged.
5. A fan speed and acceleration tester according to claim 1 or 3, characterized in that the end of the laser transmitter (4) housing far away from the fixing hoop (3) is rounded, and the arc edges of the two fin plates (14) on the laser transmitter (4) housing and the fixing hoop (3) where the laser transmitter (4) housing is located are the same in rotation direction; and the manual assembly on the fixing hoop (3) is arranged at the back end of the laser generator shell in the rotating direction.
6. A fan speed and acceleration tester according to claim 1, characterized in that the laser transmitter (4) is provided with a control button (28) electrically connected with the control board, the position of the columnar groove (10) close to the notch of the columnar groove is provided with a limit ring (29) matched with the battery (6), the battery (6) can only move along the middle axis direction in the columnar groove (10), and the maximum distance of the movement is equal to the maximum deformation range of the voltage-variable resistor (7); the battery (6) is a wirelessly rechargeable battery (6).
7. The fan speed and acceleration tester according to claim 1, wherein the adjusting assembly comprises a vertical telescopic rod (30) arranged at the top end of the base (11), a corner table (31) arranged at the top end of the vertical telescopic rod (30), and two horizontal telescopic rods (32) symmetrically arranged at two transverse ends of the corner table (31); the laser receiver (12) and the illumination intensity sensor (13) are respectively arranged at the ends of the free ends of the two horizontal telescopic rods (32).
8. The fan speed and acceleration tester according to claim 7, characterized in that a layer of matched anti-slip pad (33) is arranged at the bottom of the base (11), a group of electric telescopic rods (34) are symmetrically arranged on the outer side wall of the base (11), the telescopic direction of the electric telescopic rods (34) is vertically downward, universal wheels (35) are arranged at the ends of the free ends of the electric telescopic rods (34), and the electric telescopic rods (34) are in a fully contracted state, and the universal wheels (35) are not contacted with the ground; the electric telescopic rods (34) are all powered by an external power supply and controlled by an external computer.
9. The fan speed and acceleration tester according to claim 7, wherein the vertical telescopic rod (30) and the horizontal telescopic rod (32) are both pre-filled with magnetic fluid solution, a first electromagnet (36) is arranged in the base (11) near the bottom end position of the vertical telescopic rod (30), a second electromagnet (37) matched with the first electromagnet (36) is arranged between the free end part of the vertical telescopic rod (30) and the corner table (31), and a third electromagnet (38) is arranged in the corner table (31) near one side of the outer side wall provided with the horizontal telescopic rod (32); the first electromagnet (36), the second electromagnet (37) and the third electromagnet (38) are all powered by an external power supply and controlled by an external computer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110267064.8A CN112986606B (en) | 2021-03-11 | 2021-03-11 | Fan speed and acceleration tester |
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| CN202110267064.8A CN112986606B (en) | 2021-03-11 | 2021-03-11 | Fan speed and acceleration tester |
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| CN112986606B true CN112986606B (en) | 2023-07-25 |
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| CN204705652U (en) * | 2015-04-20 | 2015-10-14 | 李公君 | Slowspeed machine rotation-speed measuring device special in Aulomatizeted Detect work |
| CN205581130U (en) * | 2016-04-21 | 2016-09-14 | 东方桐科技（天津）有限公司 | Motor rotation number monitoring devices |
| CN207454106U (en) * | 2017-03-08 | 2018-06-05 | 天津市德祥建筑工程有限公司 | Generating set running speed monitoring device |
| CN109667726B (en) * | 2017-10-17 | 2020-09-25 | 新疆金风科技股份有限公司 | Wind turbine rotating speed measuring structure and device of wind turbine generator and wind turbine generator set |
| CN207541094U (en) * | 2017-10-30 | 2018-06-26 | 西安工业大学 | A kind of laser velocimeter equipment |
| CN108092568A (en) * | 2017-12-22 | 2018-05-29 | 吴柳平 | For the control system of the rotating speed of motor |
| CN110873812B (en) * | 2018-08-31 | 2021-08-24 | 深圳光峰科技股份有限公司 | Color wheel rotating speed detection device, light source system and projection equipment |
| CN109975574A (en) * | 2019-04-18 | 2019-07-05 | 贵州民族大学 | A kind of small propeller rotation-speed measuring device and its measurement method |
| CN209761614U (en) * | 2019-04-18 | 2019-12-10 | 湖南山立水电设备制造有限公司 | Hydroelectric generating set with overspeed protection device |
| CN111273053B (en) * | 2020-01-22 | 2022-11-01 | 武汉船用机械有限责任公司 | Rotating speed measuring device for motor |
| CN111366741A (en) * | 2020-04-16 | 2020-07-03 | 皖西学院 | Rotating speed detection device of brushless direct current motor |
| CN111913003A (en) * | 2020-07-15 | 2020-11-10 | 广州文冲船厂有限责任公司 | Shaft rotating speed measuring device |
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