CN209927879U - Small-size propeller rotation speed measuring device - Google Patents
Small-size propeller rotation speed measuring device Download PDFInfo
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- CN209927879U CN209927879U CN201920532926.3U CN201920532926U CN209927879U CN 209927879 U CN209927879 U CN 209927879U CN 201920532926 U CN201920532926 U CN 201920532926U CN 209927879 U CN209927879 U CN 209927879U
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Abstract
The utility model relates to a small-size screw rotational speed measuring device belongs to the automatic checkout field, this measuring device is including flexible stabilizer blade, the first measuring ring that the level set up, the second measuring ring that the level set up, laser emitter, laser receiver, support frame and data acquisition computer, flexible stabilizer blade fixed connection is in the bottom surface of first measuring ring, the second is measured the ring and is located the vertical top of first measuring ring, the one end and the first measuring ring fixed connection of support frame, the other end and second measuring ring fixed connection, the first measuring ring of laser emitter fixed connection, laser receiver fixed connection is on the ring is measured to the second, laser receiver sets up with laser emitter relatively, the data acquisition computer is connected with the laser receiver electricity. The beneficial effect of this measuring device is: the whole measuring device is completely independent and integrated, and is not connected with the propeller and the control system thereof, so that the installation is convenient and fast, and the measurement is convenient.
Description
Technical Field
The utility model belongs to the automated inspection field, concretely relates to small-size screw rotational speed measuring device.
Background
The propeller is a device capable of converting the rotational power of the motor into a propulsive force, and is an important component of an aircraft and a ship. Real-time dynamic rotational speed measurement of the propeller is of great significance to analysis of propeller aerodynamic characteristics and aircraft system modeling.
The existing propeller rotating speed measuring method can be divided into the following steps: (1) the method converts the problem of measuring the rotating speed of the propeller into the problem of measuring the rotating speed of the motor. At present, the motor rotating speed measuring method mainly comprises measuring speed based on a photoelectric encoder, measuring speed based on a Hall sensor and measuring speed based on the back electromotive force of a motor. The method for measuring the speed based on the photoelectric encoder is a commonly used speed measuring method at present, the photoelectric encoder is arranged on a motor rotating shaft, and the motor drives the shaft to rotate and simultaneously drives the photoelectric encoder to rotate so as to measure the rotating speed. The photoelectric encoder consists of a coding disc and a photoelectric correlation tube, and at different angles, laser of the laser correlation tube is coded by the coding disc and then transmitted to the laser receiving tube, so that the angle of the current shaft is obtained according to the coded laser, and the rotating speed of the motor is further calculated. The method for measuring speed based on the hall sensor usually integrates the hall sensor into the motor, for example, three hall switch chips are often integrated in a brushless direct current motor, and a changing magnetic field in the motor is measured to obtain the rotating speed of the motor. The speed measurement method based on the counter electromotive force of the motor is to integrate a counter electromotive force measurement circuit of the motor in an electronic speed regulator, firstly, the motor is modeled, and meanwhile, the rotating speed of the motor is estimated by combining the measured counter electromotive force; (2) sensors are mounted on the propeller blades to measure the rotational speed. A high-precision acceleration MEMS sensor is arranged on the surface or inside the propeller blade, and the speed and the acceleration of the blade are transmitted to a computer through a radio frequency identification technology to calculate the current propeller rotating speed. The method is mainly used for measuring the rotating speed of the propellers with higher requirements, such as aircraft engines, ships and the like, so that the method is not suitable for measuring the rotating speed of the small propellers, and the method for detecting the rotating speed of the small propellers wastes resources; (3) vision-based measurement methods. And acquiring a video image of the rotation of the propeller by a camera with a high frame rate, and estimating the rotation speed of the propeller by adopting a certain computer vision algorithm. The method has requirements on the computer transportation speed, the algorithm real-time performance, the camera frame rate and the shutter, so that the method is not easy to operate during measurement and has higher measurement cost.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve above-mentioned at least one technical problem and provide a small-size screw rotational speed measuring device and measuring method, whole measuring device and propeller blade itself are relatively independent, do not produce the vibration, and measuring device itself is integrated as an organic whole, does not connect with screw and its control system to make simple to operate swift, the measurement of being convenient for.
The utility model provides an above-mentioned technical problem's technical scheme as follows: the utility model provides a small-size screw rotational speed measuring device, includes flexible stabilizer blade, the first measuring ring of level setting, the second measuring ring, laser emitter, laser receiver, support frame and the data acquisition computer of level setting, flexible stabilizer blade fixed connection be in the bottom surface of first measuring ring, the second is measured the ring and is located the vertical top of first measuring ring, the one end of support frame with first measuring ring fixed connection, the other end with second measuring ring fixed connection, laser emitter fixed connection on the first measuring ring, laser receiver fixed connection be in on the second measuring ring, laser receiver with laser emitter sets up relatively, the data acquisition computer with the laser receiver electricity is connected.
The utility model has the advantages that: this measuring device is integrated as an organic whole through the welding, and does not have direct contact with screw and driving motor, makes the installation of test the speed and dismantles very convenient and fast, and it is high to the convenient simultaneous measurement precision of rotational speed measurement of screw. Meanwhile, the measuring device is simple in structure, low in manufacturing cost, capable of reducing measuring cost and suitable for measuring most small propellers. In addition, the measuring space between the second measuring ring and the first measuring ring of the measuring device is large, so that the propeller can be conveniently installed, and the length of the measurable propeller can be enlarged.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Furthermore, the laser emitter comprises a laser emitting circuit board, a laser emitting module and a plurality of laser emitting heads, the laser emitting circuit board is fixedly arranged in the first measuring ring, the laser emitting module is welded on the laser emitting circuit board and is electrically connected with the laser emitting circuit board, the plurality of laser emitting heads are fixedly connected to the upper surface of the first measuring ring in an annular mode around the circle center of the first measuring ring, and the plurality of laser emitting heads are electrically connected with the laser emitting circuit board through wires.
The beneficial effect of adopting the further scheme is that: laser is emitted through a plurality of laser emitting heads simultaneously, and the propeller shelters from the laser one by one when rotating, can improve measuring precision.
Furthermore, the laser receiver comprises a central control circuit board and a plurality of laser receiving heads, the central control circuit board is fixedly arranged in the second measuring ring, a plurality of placing holes which are distributed annularly around the circle center of the first measuring ring are formed in the second measuring ring, the plurality of laser receiving heads are respectively and fixedly connected in the placing holes and electrically connected with the central control circuit board, and the plurality of laser receiving heads and the plurality of laser emitting heads are arranged in a one-to-one correspondence manner.
The beneficial effect of adopting the further scheme is that: the laser receiving heads are arranged corresponding to the laser emitting heads to receive laser, each laser receiving head is matched with each laser emitting head, the measurement precision is higher, and the measured data is collected and transmitted by the laser receiving modules in a unified mode.
Further, still include with being used for fixed screw drive motor's motor fixer, motor fixer is located first measuring ring, the bottom and the ground contact of motor fixer.
The beneficial effect of adopting the further scheme is that: fix driving motor, drive the motor rotation when avoiding the screw to rotate, influence measurement accuracy.
Further, the motor fixer comprises a fixing bolt and a vertically arranged fixing cylinder, the fixing cylinder is located in the first measuring ring, the bottom end of the fixing cylinder is in contact with the ground, and the threaded end of the fixing bolt is in threaded connection with the top end annular wall of the fixing cylinder in a rotating mode and penetrates through the top end annular wall of the fixing cylinder to be arranged in the fixing cylinder.
The beneficial effect of adopting the further scheme is that: the fixing of the driving motor is simple and convenient.
Furthermore, the support frame comprises 3 right-angle U-shaped frames, the support frame is uniformly distributed around the circle center of the first measuring ring in a surrounding mode, one end of the support frame is fixedly connected with the outer ring wall of the first measuring ring, and the other end of the support frame is fixedly connected with the outer ring wall of the second measuring ring.
The beneficial effect of adopting the further scheme is that: the second measuring ring is firmly fixed above the first measuring ring, and meanwhile, the rotation of the propeller is not influenced, and the installation and the placement of the propeller and the driving motor are not influenced.
Further, flexible stabilizer blade is 3, 3 flexible stabilizer blade becomes triangle-shaped evenly distributed on the lower surface of first measurement ring, flexible stabilizer blade includes dead lever and rotation sleeve pipe, the one end of dead lever with the bottom surface fixed connection of first measurement ring, other end threaded connection be in the rotation sleeve pipe.
The beneficial effect of adopting the further scheme is that: can adjust the equilibrium of first measuring ring for the screw rotates remain stable, avoids causing the error.
Further, fixedly connected with battery on the side of support frame, the battery through first wire with the laser receiver electricity is connected, the battery pass through the second wire with the laser emitter electricity is connected, first wire and second wire bond respectively on the support frame side, the upper surface of second measurement ring is fixedly connected with bluetooth antenna still, bluetooth antenna with the laser receiver electricity is connected, be connected with bluetooth adapter and electric connection on the data acquisition computer, bluetooth adapter with bluetooth antenna bluetooth is connected.
The beneficial effect of adopting the further scheme is that: the power is supplied by the battery, and the acquired signals are transmitted to the data acquisition computer by Bluetooth, so that the transmission efficiency is high; meanwhile, data transmission is carried out by adopting a wireless Bluetooth technology, so that the mobile online propeller speed measurement is realized. Meanwhile, the Bluetooth technology is convenient for networking with other measuring systems, and a propeller rotating speed-lift model can be obtained by simultaneously adopting a Bluetooth chip to measure the lift of the propeller. Therefore, the adoption of the wireless Bluetooth technology greatly improves the expandability of the system.
In addition the utility model also provides an adopt foretell small-size screw rotational speed measuring device's measuring method, including following step:
s1, adjusting balance of the measuring device, and electrically connecting the laser receiver with the data acquisition computer;
s2, fixing a driving motor for driving the propeller to be tested to rotate on the first measuring ring, and installing the propeller to be tested on an output shaft of the driving motor;
s3, starting the laser transmitter, the laser receiver and the driving motor, wherein laser generated by the laser transmitter is received by the laser receiver, and after the propeller blocks the laser when rotating between the first measuring ring and the second measuring ring, the laser receiver can transmit a signal to the data acquisition computer when the laser cannot be received;
and S4, blocking the laser intermittently along with the rotation of the propeller, sending intermittent signals to the data acquisition computer by the laser receiver, and calculating the rotating speed of the propeller by the data acquisition computer according to the signals.
The measuring method has the beneficial effects that: the propeller rotating speed can be calculated very conveniently by collecting breakpoint signals which shield laser when the propeller rotates and collecting and arranging the breakpoint signals, complex equipment and sensors do not need to be equipped, the measurement cost is saved, the measurement is convenient, the application range is wider, and the popularization is facilitated.
Drawings
FIG. 1 is a schematic perspective view of the measuring device of the present invention;
FIG. 2 is a schematic perspective view of the measuring device of the present invention
FIG. 3 is a front view of the measuring device of the present invention in use;
FIG. 4 is a top view of the measuring device of the present invention in use;
fig. 5 is a bottom view of a second measuring ring of the present invention;
fig. 6 is a top view of the motor holder of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. the device comprises a rotating sleeve, 2, a fixing rod, 3, a supporting frame, 4, a first measuring ring, 5, a second measuring ring, 6, a motor fixer, 7, a laser transmitter, 8, a propeller, 9, a Bluetooth antenna, 10, a battery, 11, a first wire, 12, a second wire, 13, a data acquisition computer, 14, a Bluetooth adapter, 15, a laser receiver, 16, a driving motor, 17, a fixing cylinder, 18 and a fixing bolt.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
Examples
As shown in fig. 1-6, this embodiment provides a device for measuring the rotating speed of a small propeller, which includes a telescopic support leg, a first measuring ring 4 horizontally disposed, a second measuring ring 5 horizontally disposed, a laser emitter 8, a laser receiver 15, a support frame 3 and a data collecting computer 13, wherein the telescopic support leg is fixedly connected to the bottom surface of the first measuring ring 4 by welding, the first measuring ring 4 is supported by the telescopic support leg, the second measuring ring 5 is located vertically above the first measuring ring 4, the circle centers of the second measuring ring 5 and the first measuring ring 4 are located on a coaxial line, the second measuring ring 5 and the first measuring ring 4 are both in a metal shell shape, the diameters of the second measuring ring 5 and the first measuring ring 4 are 200mm, one end of the support frame 3 is fixedly connected to the first measuring ring 4, and the other end is fixedly connected to the second measuring ring 5, specifically, the support frame 3 includes 3 right-angle U-shaped frames, support frame 3 encircles evenly distributed around the centre of a circle of first measurement ring 4, contained angle between two liang of support frames 3 is 120, the one end of support frame 3 passes through welded fastening with the outer rampart of first measurement ring 4 and is connected, the other end passes through welded fastening with the outer rampart of second measurement ring 5, measure ring 5 through support frame 3 and fix in the vertical top of first measurement ring 4 with the second, the width length of support frame 3 is 200mm, highly be 300mm, when measuring 8 rotational speeds of propeller, the space internal rotation that propeller 8 formed between 3 support frames 3, make 8 movable diameters of propeller be 600mm, can measure propeller blade length and be less than 300 mm's propeller 8.
Concretely, laser emitter 8 includes the laser emission circuit board, laser emission module and a plurality of laser emission head, through a plurality of laser emission head transmission sharp laser, the fixed setting of laser emission circuit board is in first measuring ring 4, first measuring ring 4 is interior empty metal casing, laser emission module welding is on the laser emission circuit board and electric connection, a plurality of laser emission heads become cyclic annular fixed connection on the upper surface of first measuring ring 4 around the centre of a circle of first measuring ring 4, a plurality of laser emission heads pass through the wire and are connected with the laser emission circuit board electricity, control laser emission head through laser emission module and produce the continuation laser, and emit out, the laser emission module, laser emission circuit board and laser emission head are prior art. Specifically, 8-12 laser emission heads are arranged, are uniformly arranged around the circle center of the first measuring ring 4 in an annular mode respectively, and simultaneously generate laser to emit to the second measuring ring 5, so that the propeller 8 shields each laser emission head one by one to shield the laser when rotating, and the rotating speed of the propeller 8 is calculated through shielded data.
Specifically, the laser receiver 15 includes a central control circuit board and a plurality of laser receiving heads, the laser receiving heads are used for receiving irradiated laser and converting the irradiated laser into an electric signal to be transmitted to the central control circuit board, a single chip microcomputer is integrated on the central control circuit board and used for real-time data acquisition and transmitting data to the data acquisition computer 13, the model of the single chip microcomputer is TI Cortex M3CC2640, the central control circuit board is in the prior art, the central control circuit board is integrated with a laser detection circuit and a voltage comparison circuit, the laser detection circuit and the voltage comparison circuit are in the prior art, the central control circuit board is fixedly arranged in a second measurement ring 5, the second measurement ring 5 is an annular metal shell, a plurality of placing holes are arranged on the second measurement ring 5 in an annular manner around the center of the first measurement ring 4, the plurality of laser receiving heads are respectively fixedly connected in the placing holes and welded on the central control circuit board and electrically connected with the central control circuit board, after the laser receiving heads receive the laser, the laser receiving heads are converted into electric signals to be transmitted to the central control circuit board, data are collected, when the laser is shielded, the single laser receiving head does not receive the laser, the signals transmitted to the central control circuit board are broken points, and the controller collects the signals of the broken points and transmits the signals to the data collection computer 13. Specifically, the number of the laser receiving heads is 8-12, the plurality of laser receiving heads and the plurality of laser emitting heads are arranged in a one-to-one correspondence manner, and laser generated by emitting of one laser emitting head is received by one laser receiving head.
Preferably, the present embodiment further comprises a motor holder 6 for holding a drive motor 16 of the propeller 8. Motor fixer 6 is located first measuring ring 4, and motor fixer 6's bottom and ground contact put into motor fixer 6 with driving motor 16, and motor fixer 6 fixes driving motor 16, and the screw 8 is at the space internal rotation between a plurality of support frames 3, is convenient for stably fix the motor.
Specifically, motor fixer 6 includes vertical fixed drum 17 and the fixing bolt 18 that sets up, and fixed drum 17 is located first measurement ring 4, and the bottom and the ground contact of fixed drum 17, and the top rampart that the screw thread end threaded connection of fixing bolt 18 passed fixed drum 17 is rotated and is placed in fixed drum 17, when driving motor 16 was placed in fixed drum 17, rotates fixing bolt 18 for the screw thread end of fixing bolt 18 and driving motor 16's shell butt, thereby with driving motor 16 locking fixed.
Preferably, the number of the telescopic supporting feet is 3, the 3 telescopic supporting feet are uniformly distributed on the lower surface of the first measuring ring 4 in a triangular mode, and the first measuring ring 4 is supported by the 3 telescopic supporting feet; specifically, flexible stabilizer blade includes dead lever 2 and rotating sleeve 1, the one end of dead lever 2 and the bottom surface fixed connection of first measuring ring 4, other end threaded connection is in rotating sleeve 1, dead lever 2 is close to rotating sleeve 1 and serves and be equipped with the external screw thread, be equipped with the internal thread with external screw thread matched with in rotating sleeve 1, through rotatory rotating sleeve 1, make rotating sleeve 1 relative dead lever 2 remove, through 3 rotating sleeve 1 of coordinated adjustment, thereby the adjustment makes first measuring ring 4 keep the horizontality, so that keep spiral pivoted equilibrium, improve measurement accuracy.
Preferably, a battery 10 is fixedly connected to the side edge of the support frame 3 by welding, the battery 10 is a 12V lithium battery 10, the battery 10 is electrically connected to the central control circuit board by a first lead 11 to supply power to the laser receiver 15, and the battery 10 is electrically connected to the laser emitting circuit board by a second lead 12 to supply power to the laser emitter 8; specifically, the first lead 11 and the second lead 12 are detachably connected with the battery 10 through a T plug, and the battery 10 is provided with a switch for turning on or off power supply to the laser transmitter 8 and the laser receiver 15; the first wire 11 and the second wire 12 are respectively bonded on the side edge of the support frame 3, the upper surface of the second measuring ring 5 is also fixedly connected with a Bluetooth antenna 9, the Bluetooth antenna 9 is electrically connected with a laser receiving module, an electric signal received by the laser receiving module is transmitted to a data acquisition computer 13 through the Bluetooth antenna 9, the data acquisition computer 13 is connected with a Bluetooth adapter 14 through a USB socket and is electrically connected with the Bluetooth adapter, the Bluetooth adapter 14 is in Bluetooth connection with the Bluetooth antenna 9, the data acquisition computer 13 sorts and collects the signal transmitted through Bluetooth, and the rotating speed of the propeller 8 is obtained through resolving; specifically, the bluetooth antenna 9 and the bluetooth adapter 14 adopt a BLE 4.1 communication protocol, and the transmission efficiency is high, wherein the bluetooth antenna 9 and the bluetooth adapter 14 are in the prior art.
The embodiment also provides a measuring method adopting the rotating speed measuring device of the small propeller, which comprises the following steps:
s1, the height of the telescopic supporting foot is changed by rotating the rotating sleeve 1, so that the height of the first measuring ring 4 is proper, the first measuring ring 4 is adjusted to be in a horizontal balance state, the Bluetooth antenna 9 is connected with the Bluetooth adapter 14 on the data acquisition computer 13 in a Bluetooth mode, and the electric signal acquired by the laser receiver 15 is transmitted to the data acquisition computer 13 through the Bluetooth antenna 9;
s2, placing the propeller 8 to be measured and the driving motor 16 thereof between the first measuring ring 4 and the second measuring ring 5, placing the driving motor 16 in the fixed cylinder 17, fixing the driving motor 16 in the fixed cylinder 17 by rotating the fixing bolt 18, enabling the output end of the driving motor 16 to face upwards, installing the propeller to be measured on the output shaft of the driving motor 16, and enabling the propeller 8 to rotate in a space formed among the plurality of support frames 3;
s3, starting the laser emitter 8 and the laser receiver 15 through a switch, wherein laser generated by the laser emitter 8 is received by the laser receiver 15, connecting the driving motor 16 with an external power supply, so that the driving motor 16 drives the propeller 8 to rotate, when the propeller 8 rotates between the first measuring ring 4 and the second measuring ring 5, when the propeller rotates to one of the laser emitters, the laser emitted by the laser emitter is shielded, and the corresponding laser receiver cannot receive the laser, the central control circuit board is integrated with a laser detection circuit and a voltage comparison circuit, when the propeller blades block the laser, the laser detection circuit outputs low voltage, the voltage comparison circuit is triggered, so that the single chip on the central control circuit board detects the signal, a timer interrupt program in the single chip is triggered, the time breakpoint signal is recorded, and the single chip integrated on the central control circuit board collects the breakpoint signal, the breakpoint signal is transmitted to a Bluetooth antenna 9 and transmitted to a data acquisition computer 13 through Bluetooth;
s4, along with the continuous rotation of the propeller 8, the laser generated by each laser emitting head can be shielded intermittently, so that the laser receiving heads continuously and discontinuously receive the laser, the central control circuit board continuously collects breakpoint signals of each laser receiving head to form uniform time intermittent signals, then the time intermittent signals formed by a series of breakpoint signals are transmitted to the Bluetooth antenna 9 through the UART, the data acquisition computer 13 receives the time intermittent signals through the Bluetooth adapter 14, the data acquisition computer 13 collects and arranges the intermittent signals after receiving the intermittent signals, and the computer solves the angular speed of the propeller through two connected time intermittent signals and displays the speed information of the propeller.
The above description is only for the preferred embodiment of the present invention, and should not be construed as limiting the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (8)
1. The small propeller rotating speed measuring device is characterized by comprising a telescopic supporting leg, a first measuring ring (4) which is horizontally arranged, a second measuring ring (5) which is horizontally arranged, a laser transmitter (7), a laser receiver (15), a supporting frame (3) and a data acquisition computer (13), wherein the telescopic supporting leg is fixedly connected to the bottom surface of the first measuring ring (4), the second measuring ring (5) is positioned above the first measuring ring (4), one end of the supporting frame (3) is fixedly connected with the first measuring ring (4), the other end of the supporting frame is fixedly connected with the second measuring ring (5), the laser transmitter (7) is fixedly connected to the first measuring ring (4), the laser receiver (15) is fixedly connected to the second measuring ring (5), and the laser receiver (15) and the laser transmitter (7) are oppositely arranged, the data acquisition computer (13) is electrically connected with the laser receiver (15).
2. The rotating speed measuring device of the small propeller as recited in claim 1, wherein the laser emitter (7) comprises a laser emitting circuit board, a laser emitting module and a plurality of laser emitting heads, the laser emitting circuit board is fixedly arranged in the first measuring ring (4), the laser emitting module is welded on the laser emitting circuit board and electrically connected, the plurality of laser emitting heads are fixedly connected on the upper surface of the first measuring ring (4) in a ring shape around the center of the first measuring ring (4), and the plurality of laser emitting heads are electrically connected with the laser emitting circuit board through a conducting wire.
3. The rotating speed measuring device of the small propeller as recited in claim 2, wherein the laser receiver (15) comprises a central control circuit board and a plurality of laser receiving heads, the central control circuit board is fixedly arranged in the second measuring ring (5), the second measuring ring (5) is provided with a plurality of placing holes annularly distributed around the center of the first measuring ring (4), the plurality of laser receiving heads are respectively and fixedly connected in the placing holes and electrically connected with the central control circuit board, and the plurality of laser receiving heads and the plurality of laser emitting heads are arranged in a one-to-one correspondence manner.
4. A miniature propeller rotation speed measuring device according to claim 1, further comprising a motor holder (6) for holding a propeller drive motor, said motor holder (6) being located within said first measuring ring (4), the bottom end of said motor holder (6) being in contact with the ground.
5. The device for measuring the rotating speed of the small propeller as recited in claim 4, wherein the motor fixer (6) comprises a fixing bolt (18) and a vertically arranged fixing cylinder (17), the fixing cylinder (17) is positioned in the first measuring ring (4), the bottom end of the fixing cylinder (17) is in contact with the ground, and the threaded end of the fixing bolt (18) is in threaded connection and rotates to penetrate through the top annular wall of the fixing cylinder (17) to be placed in the fixing cylinder (17).
6. The device for measuring the rotating speed of the small propeller as recited in claim 1, wherein the supporting frame (3) comprises 3 right-angled U-shaped frames, the supporting frames (3) are uniformly distributed around the center of the first measuring ring (4), one end of the supporting frame (3) is fixedly connected with the outer annular wall of the first measuring ring (4), and the other end of the supporting frame is fixedly connected with the outer annular wall of the second measuring ring (5).
7. The rotating speed measuring device of the small propeller as recited in claim 1, wherein the number of the telescopic legs is 3, the 3 telescopic legs are evenly distributed on the lower surface of the first measuring ring (4) in a triangular shape, the telescopic legs comprise a fixed rod (2) and a rotating sleeve (1), one end of the fixed rod (2) is fixedly connected with the bottom surface of the first measuring ring (4), and the other end of the fixed rod is screwed in the rotating sleeve (1).
8. A small propeller rotation speed measuring device according to any one of claims 1 to 7, it is characterized in that a battery (10) is fixedly connected on the side edge of the supporting frame (3), the battery (10) is electrically connected with the laser receiver (15) through a first lead (11), the battery (10) is electrically connected with the laser transmitter (7) through a second lead (12), the first lead (11) and the second lead (12) are respectively bonded on the side edges of the support frame (3), the upper surface of the second measuring ring (5) is also fixedly connected with a Bluetooth antenna (9), the Bluetooth antenna (9) is electrically connected with the laser receiver (15), the data acquisition computer (13) is connected with a Bluetooth adapter (14) and is electrically connected, the Bluetooth adapter (14) is connected with the Bluetooth antenna (9) in a Bluetooth mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920532926.3U CN209927879U (en) | 2019-04-18 | 2019-04-18 | Small-size propeller rotation speed measuring device |
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| CN201920532926.3U CN209927879U (en) | 2019-04-18 | 2019-04-18 | Small-size propeller rotation speed measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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