CN112284447B - Noise and vibration integration on-line monitoring sensor based on thing networking - Google Patents
Noise and vibration integration on-line monitoring sensor based on thing networking Download PDFInfo
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- CN112284447B CN112284447B CN202011096348.7A CN202011096348A CN112284447B CN 112284447 B CN112284447 B CN 112284447B CN 202011096348 A CN202011096348 A CN 202011096348A CN 112284447 B CN112284447 B CN 112284447B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
- G01D11/24—Housings ; Casings for instruments
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
- G01D11/30—Supports specially adapted for an instrument; Supports specially adapted for a set of instruments
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N15/00—Holding or levitation devices using magnetic attraction or repulsion, not otherwise provided for
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention discloses a noise and vibration integrated online monitoring sensor based on the Internet of things. Has the advantages that: according to the invention, the sensor frame, the radio, the vibration measurement clamping ring and the measurement module are arranged, and the sensor components for noise monitoring and vibration monitoring are packaged into one structure, so that the integral control operation of a user is facilitated, the working efficiency is improved, and the installation cost is saved; through the arrangement of the sound insulation glass and the measuring inlet hole, external noise is effectively isolated from entering a monitoring area, and the interference of an external noise source on monitoring data is reduced; through setting up electromagnetism lifting base, solenoid one and solenoid two, use the electromagnetic force of mutual repulsion to lift monitoring facilities to the air, avoid the supporting mechanism conduction external vibration of contact with it, influence vibration sensor's measured data.
Description
Technical Field
The invention relates to the technical field of sensors, in particular to a noise and vibration integrated online monitoring sensor based on the Internet of things.
Background
The sensor is a detection device, can sense the measured information, can convert the sensed information into an electric signal or other information in a required form according to a certain rule and output the electric signal or other information so as to meet the requirements of information transmission, processing, storage, display, recording, control and the like, and the existence and development of the sensor enable an object to have senses of touch, taste, smell and the like, so that the object can slowly become alive.
The equipment can produce noise and vibration when working, need to monitor the operating condition of equipment to these noise and vibration detect to reach the purpose of protection equipment.
The structure of current noise and vibration monitoring sensor for separately installing when using is unfavorable for user's whole operation to use, and noise monitoring sensor receives the interference of outside noise source easily, influences noise monitoring data, and vibration detection sensor receives external vibration's interference easily, influences the data of vibration monitoring.
Disclosure of Invention
The invention aims to solve the problems and provide an integrated online monitoring sensor for noise and vibration based on the internet of things.
The invention realizes the purpose through the following technical scheme:
a noise and vibration integrated online monitoring sensor based on the Internet of things comprises a sensor frame, an electromagnetic lifting base and sound insulation glass, wherein a maintenance box plate is arranged at the top of the sensor frame, a filtering exhaust window is arranged in the middle of the top end of the maintenance box plate, the sound insulation glass is arranged on the peripheral wall of the sensor frame, a measurement inlet hole is formed in the sound insulation glass, a radio is arranged on the inner wall of the sound insulation glass, a system circuit board is arranged at the bottom in the sensor frame, a measurement module is arranged at the top of the system circuit board, a support rod is arranged at the top of the measurement module, a vibration measurement clamping ring is arranged at the top of the support rod, a clamping saw is arranged at the top of the vibration measurement clamping ring, a displacement sensor is arranged on the inner wall of the vibration measurement clamping ring, an acceleration sensor is arranged in the support rod, and a filter is arranged at one corner of the measurement module, wave filter one side is provided with the amplifier, the wave filter opposite side is provided with digital-to-analog converter, measuring module is provided with microprocessor in one corner department in addition, the sensor frame bottom is provided with the base is lifted to the electromagnetism, the electromagnetism is lifted base top four corners department and is provided with spacing angle frame, the electromagnetism is lifted base top and is provided with solenoid one, solenoid is directly over the sensor frame bottom is provided with solenoid two, be in under the system circuit board sensor frame bottom is provided with the entrance hole, the electromagnetism is lifted base bottom and is provided with voltage controller, the electromagnetism is lifted base one side and is provided with the operation control box, operation control box top is provided with the monitor display.
Furthermore, maintain the boxboard with sensor frame passes through hinge connection, it is embedded to filter the exhaust window maintain on the boxboard, sound insulation glass passes through the draw-in groove and installs on the sensor frame.
Furthermore, the measuring inlet hole is formed in the sound-proof glass, the radio is installed on the sound-proof glass in a gluing mode, and the system circuit board is fixed to the bottom in the sensor frame through screws.
Furthermore, the measuring module is electrically connected with the system circuit board, the supporting rod is fixed with the measuring module through a clamping groove, a circuit inside the supporting rod is electrically communicated with the measuring module, and an acceleration sensor is clamped and pressed inside the supporting rod.
Furthermore, the vibration measurement clamping ring and the supporting rod are installed in a matched mode through the acceleration sensor, the displacement sensor is tightly attached to the inner wall of the vibration measurement clamping ring, and the clamping saw and the vibration measurement clamping ring are of an integrated structure.
Furthermore, the filter, the amplifier, the digital-to-analog converter and the microprocessor are electrically connected with the measuring module, and the electromagnetic lifting base is connected with the sensor frame through a lead.
Furthermore, the limiting angle frame is installed on the electromagnetic lifting base through a screw, and the first electromagnetic coil is embedded in the electromagnetic lifting base.
Further, the second electromagnetic coil is embedded in the bottom of the sensor frame, the wire inlet hole is formed in the bottom of the sensor frame, and the voltage controller is electrically communicated with the second electromagnetic coil and the first electromagnetic coil.
Furthermore, the operation control box is connected with the voltage controller through a lead, and the monitoring display is communicated with the operation control box through a lead.
The specific working principle is as follows: the device is fixed in a proper position through the electromagnetic lifting base, then equipment to be monitored is inserted into the sensor frame through the measuring access hole, the maintenance box door is tested to be opened, a user manually clamps the equipment into the vibration measuring clamping ring and uses the clamping saw to clamp and fix, the maintenance box door is closed, the operation control box starting device works, the voltage controller distributes stable voltage for the first electromagnetic coil and the second electromagnetic coil and generates mutually exclusive magnetic fields, so that the sensor frame is lifted to a certain position under the pushing of magnetic force and is always positioned right above the electromagnetic lifting base along the limiting angle frame, then the monitoring component in the device can be normally used for monitoring, the sound insulation glass is of a hollow structure in the device, the sound insulation effect is greatly improved, and more accurate noise data around the receiver receiving equipment are realized, simultaneously vibration measurement clamp ring passes through displacement sensor and acceleration sensor common complex effect, comes monitoring devices's vibration data, and noise data and vibration data all transmit into measurement module, under the effect of wave filter, amplifier, digital analog converter and microprocessor, change analog signal into the electronic signal that can dock, show at last on the control display, also can be through the inside thing networking port transmission of operation control box to service center, reach the purpose of data quick sharing.
The invention has the beneficial effects that:
1. according to the invention, the sensor frame, the radio, the vibration measurement clamping ring and the measurement module are arranged, and the sensor components for noise monitoring and vibration monitoring are packaged into one structure, so that the integration level of the device is improved, the integral control operation of a user is facilitated, the working efficiency is improved, and the installation cost is saved;
2. according to the invention, through the arrangement of the sound insulation glass and the measurement inlet hole, external noise is effectively isolated from entering a monitoring area, and the interference of an external noise source on monitoring data is reduced;
3. according to the invention, by arranging the electromagnetic lifting base, the electromagnetic coil I and the electromagnetic coil II, the monitoring equipment can be selectively lifted into the air by using mutually exclusive electromagnetic force according to the dead weight of the device, and the influence on the measurement data of the vibration sensor caused by the conduction of external vibration by the supporting mechanism in contact with the monitoring equipment is avoided.
Drawings
FIG. 1 is a schematic structural diagram of an integrated noise and vibration online monitoring sensor based on the Internet of things;
FIG. 2 is a schematic view of a connection relationship between a vibration measurement clamping ring and a support rod in the noise and vibration integrated online monitoring sensor based on the Internet of things;
FIG. 3 is a top cross-sectional view of a measuring module in the noise and vibration integrated online monitoring sensor based on the Internet of things according to the invention;
FIG. 4 is a front view of an electromagnetic lifting base in the noise and vibration integrated online monitoring sensor based on the Internet of things;
fig. 5 is a bottom view of a sensor frame in the noise and vibration integrated online monitoring sensor based on the internet of things.
The reference numerals are explained below:
1. a sensor frame; 2. sound-proof glass; 3. maintaining the boxboard; 4. a radio; 5. a system circuit board; 6. a vibration measuring clamp ring; 7. a support bar; 8. a measurement module; 9. a wire inlet hole; 10. an electromagnetic lifting base; 11. a first electromagnetic coil; 12. a limiting angle bracket; 13. a second electromagnetic coil; 14. a voltage controller; 15. monitoring the display; 16. operating the control box; 17. a displacement sensor; 18. an acceleration sensor; 19. a filter; 20. an amplifier; 21. a digital-to-analog converter; 22. a microprocessor; 23. measuring an access hole; 24. clamping and sawing; 25. and filtering the exhaust window.
Detailed Description
The invention will be further described with reference to the accompanying drawings in which:
as shown in figures 1-5, an integrated online noise and vibration monitoring sensor based on the Internet of things comprises a sensor frame 1, an electromagnetic lifting base 10 and sound-proof glass 2, wherein a maintenance box plate 3 is arranged at the top of the sensor frame 1, a filtering exhaust window 25 is arranged in the middle of the top end of the maintenance box plate 3, the sound-proof glass 2 is arranged on the peripheral wall of the sensor frame 1, a measuring inlet hole 23 is arranged on the sound-proof glass 2, a radio 4 is arranged on the inner wall of the sound-proof glass 2, a system circuit board 5 is arranged at the bottom in the sensor frame 1, a measuring module 8 is arranged at the top of the system circuit board 5, a support rod 7 is arranged at the top of the measuring module 8, a vibration measuring clamp ring 6 is arranged at the top of the support rod 7, a clamp saw 24 is arranged at the top of the vibration measuring clamp ring 6, a displacement sensor 17 is arranged on the inner wall of the vibration measuring clamp ring 6, and an acceleration sensor 18 is arranged in the support rod 7, one corner department is provided with wave filter 19 on measuring module 8, wave filter 19 one side is provided with amplifier 20, wave filter 19 opposite side is provided with digital-to-analog converter 21, measuring module 8 is provided with microprocessor 22 in one corner department in addition, sensor frame 1 bottom is provided with electromagnetism lifting base 10, electromagnetism lifting base 10 top four corners department is provided with spacing angle frame 12, electromagnetism lifting base 10 top is provided with solenoid 11, be provided with solenoid two 13 in sensor frame 1 bottom directly over solenoid 11, be provided with entrance hole 9 in sensor frame 1 bottom under system circuit board 5, electromagnetism lifting base 10 bottom is provided with voltage controller 14, electromagnetism lifting base 10 one side is provided with operation control box 16, operation control box 16 top is provided with monitor display 15.
In this embodiment, maintain boxboard 3 and sensor frame 1 and pass through hinge connection, filter exhaust window 25 embedded on maintaining boxboard 3, soundproof glass 2 passes through the draw-in groove and installs on sensor frame 1, maintains the coupling assembling that boxboard 3 was used for convenience of customers manual installation equipment and sensor, filters the inside air filter that is of exhaust window 25, filters the air supply that gets into.
In the embodiment, the measuring inlet hole 23 is formed in the sound-proof glass 2, the radio 4 is installed on the sound-proof glass 2 in a gluing mode, the system circuit board 5 is fixed to the bottom in the sensor frame 1 through screws, a sealing gasket is arranged around the measuring inlet hole 23, and the system circuit board 5 is a direct control terminal for executing corresponding operation and receiving and storing data for the sensor.
In this embodiment, measurement module 8 and system circuit board 5 electric connection, bracing piece 7 passes through the draw-in groove with measurement module 8 to be fixed, the inside circuit of bracing piece 7 and measurement module 8 electric intercommunication, the inside card of bracing piece 7 is pressed there is acceleration sensor 18, measurement module 8 concentrates the subassembly of noise sensor and vibration sensor data conversion to a module, reaches the effect of sharing, acceleration sensor 18 judges the level of vibration through measuring equipment's instantaneous acceleration.
In this embodiment, the vibration measurement clamp ring 6 and the support rod 7 are installed in a matching manner through the acceleration sensor 18, the displacement sensor 17 is tightly attached to the inner wall of the vibration measurement clamp ring 6, the clamp saw 24 and the vibration measurement clamp ring 6 are of an integrated structure, the displacement sensor 17 judges and records vibration data through the displacement data of the measurement equipment, and the clamp saw 24 is used for stably connecting the equipment and the vibration measurement clamp ring 6.
In this embodiment, the filter 19, the amplifier 20, the digital-to-analog converter 21 and the microprocessor 22 are electrically connected to the measuring module 8, and the electromagnetic lifting base 10 is connected to the sensor frame 1 through a wire.
In this embodiment, the limiting angle bracket 12 is installed on the electromagnetic lifting base 10 through a screw, the first electromagnetic coil 11 is embedded in the electromagnetic lifting base 10, and the limiting angle bracket 12 only provides a limiting adjustment effect when the electromagnetic lifting base 10 supports the sensor frame 1, so that a corresponding supporting force cannot be provided for the sensor frame 1, and the conduction and vibration of an external structure are avoided.
In this embodiment, the second electromagnetic coil 13 is embedded in the bottom of the sensor frame 1, the wire inlet 9 is formed in the bottom of the sensor frame 1, and the voltage controller 14 is electrically connected to both the second electromagnetic coil 13 and the first electromagnetic coil 11.
In this embodiment, the operation control box 16 is connected to the voltage controller 14 through a wire, the monitoring display 15 is connected to the operation control box 16 through a wire, the first electromagnetic coil 11 and the second electromagnetic coil 13 both have the same and stable voltage distributed by the voltage controller 14, and the current directions of the first electromagnetic coil 11 and the second electromagnetic coil 13 are opposite, so as to generate repulsive electromagnetic force, which just supports the sensor frame 1 and its internal components for a certain distance to reach a constant posture, and the voltage controller 14 has a structure for stabilizing voltage, stabilizing current and maintaining voltage frequency unchanged, so as to avoid instability of electromagnetic force caused by unstable voltage, which causes shaking of the device and affects measurement.
The specific working principle is as follows: the device is fixed at a proper position through an electromagnetic lifting base 10, then equipment to be monitored is inserted into a sensor frame 1 through a measuring access hole 23, a test maintenance box door is opened, a user manually clamps the equipment into a vibration measuring clamping ring 6 and clamps and fixes the equipment by using a clamping saw 24, the maintenance box door is closed, the device is started to work through an operation control box 16, a voltage controller 14 distributes stable voltage to a first electromagnetic coil 11 and a second electromagnetic coil 13 and generates mutually exclusive magnetic fields, so that the sensor frame 1 is lifted to a certain position under the pushing of magnetic force and is always positioned right above the electromagnetic lifting base 10 along a limiting angle frame 12, then the monitoring component in the device can be normally used for monitoring, the sound insulation glass 2 is of a hollow structure in the device, the sound insulation effect is greatly improved, and the radio 4 receives more accurate noise data around the equipment, meanwhile, the vibration measuring clamping ring 6 monitors the vibration data of the equipment through the cooperation of the displacement sensor 17 and the acceleration sensor 18, the noise data and the vibration data are transmitted into the measuring module 8, the analog signals are converted into butt-jointed electronic signals under the action of the filter 19, the amplifier 20, the digital-to-analog converter 21 and the microprocessor 22, and finally the butt-jointed electronic signals are displayed on the monitoring display 15 and also can be transmitted to a service center through an internet of things port inside the operation control box 16, so that the purpose of quickly sharing the data is achieved.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (8)
1. The utility model provides a noise and vibration integration on-line monitoring sensor based on thing networking which characterized in that: comprises a sensor frame (1), an electromagnetic lifting base (10) and sound-proof glass (2), wherein the top of the sensor frame (1) is provided with a maintenance box plate (3), the middle part of the top end of the maintenance box plate (3) is provided with a filtering exhaust window (25), the peripheral wall of the sensor frame (1) is provided with the sound-proof glass (2), the sound-proof glass (2) is provided with a measurement access hole (23), the inner wall of the sound-proof glass (2) is provided with a radio (4), the bottom of the sensor frame (1) is provided with a system circuit board (5), the top of the system circuit board (5) is provided with a measurement module (8), the top of the measurement module (8) is provided with a support rod (7), the top of the support rod (7) is provided with a vibration measurement clamping ring (6), and the top of the vibration measurement clamping ring (6) is provided with a clamping saw (24), a displacement sensor (17) is arranged on the inner wall of the vibration measurement clamping ring (6), an acceleration sensor (18) is arranged in the supporting rod (7), a filter (19) is arranged at one corner of the measurement module (8), an amplifier (20) is arranged at one side of the filter (19), a digital-to-analog converter (21) is arranged at the other side of the filter (19), a microprocessor (22) is arranged at another corner of the measurement module (8), the electromagnetic lifting base (10) is arranged at the bottom of the sensor frame (1), limiting angle frames (12) are arranged at four corners of the top of the electromagnetic lifting base (10), a first electromagnetic coil (11) is arranged at the top of the electromagnetic lifting base (10), a second electromagnetic coil (13) is arranged right above the first electromagnetic coil (11) at the bottom of the sensor frame (1), the system comprises a system circuit board (5), wherein a wire inlet hole (9) is formed in the bottom of a sensor frame (1), a voltage controller (14) is arranged at the bottom of an electromagnetic lifting base (10), an operation control box (16) is arranged on one side of the electromagnetic lifting base (10), a monitoring display (15) is arranged at the top of the operation control box (16), a vibration measurement clamping ring (6) is installed with a supporting rod (7) in a matched mode through an acceleration sensor (18), a displacement sensor (17) is tightly attached to the inner wall of the vibration measurement clamping ring (6), and a clamping saw (24) and the vibration measurement clamping ring (6) are of an integrated structure.
2. The noise and vibration integrated online monitoring sensor based on the Internet of things according to claim 1, characterized in that: maintain boxboard (3) with sensor frame (1) passes through hinge connection, it is embedded in to filter exhaust window (25) maintain on boxboard (3), sound insulation glass (2) are installed through the draw-in groove on sensor frame (1).
3. The noise and vibration integrated online monitoring sensor based on the Internet of things according to claim 1, characterized in that: the measurement access hole (23) is formed in the soundproof glass (2), the radio (4) is installed on the soundproof glass (2) in a gluing mode, and the system circuit board (5) is fixed to the inner bottom of the sensor frame (1) through screws.
4. The noise and vibration integrated online monitoring sensor based on the Internet of things according to claim 1, characterized in that: the measuring module (8) is electrically connected with the system circuit board (5), the supporting rod (7) is fixed with the measuring module (8) through a clamping groove, a circuit inside the supporting rod (7) is electrically communicated with the measuring module (8), and an acceleration sensor (18) is clamped and pressed inside the supporting rod (7).
5. The noise and vibration integrated online monitoring sensor based on the Internet of things according to claim 1, characterized in that: the filter (19), the amplifier (20), the digital-to-analog converter (21) and the microprocessor (22) are electrically connected with the measuring module (8), and the electromagnetic lifting base (10) is connected with the sensor frame (1) through a lead.
6. The noise and vibration integrated online monitoring sensor based on the Internet of things according to claim 1, characterized in that: the limiting angle frame (12) is installed on the electromagnetic lifting base (10) through a screw, and the first electromagnetic coil (11) is embedded in the electromagnetic lifting base (10).
7. The noise and vibration integrated online monitoring sensor based on the Internet of things according to claim 1, characterized in that: the electromagnetic coil II (13) is embedded in the bottom of the sensor frame (1), the wire inlet hole (9) is formed in the bottom of the sensor frame (1), and the voltage controller (14) is electrically communicated with the electromagnetic coil II (13) and the electromagnetic coil I (11).
8. The noise and vibration integrated online monitoring sensor based on the Internet of things according to claim 1, characterized in that: the operation control box (16) is connected with the voltage controller (14) through a lead, and the monitoring display (15) is communicated with the operation control box (16) through a lead.
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| CN202011096348.7A CN112284447B (en) | 2020-10-14 | 2020-10-14 | Noise and vibration integration on-line monitoring sensor based on thing networking |
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| CN114810571B (en) * | 2022-03-10 | 2023-09-22 | 益鑫能源科技(上海)有限公司 | Fault monitoring system for air compressor unit |
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| JPH09230874A (en) * | 1996-02-22 | 1997-09-05 | Fujitsu Ltd | Active noise/vibration control system |
| CN109883473A (en) * | 2019-02-21 | 2019-06-14 | 广州市圣高测控科技有限公司 | A kind of non-contact temperature measuring and tachometric survey integrated analysis instrument |
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| JP2008175776A (en) * | 2007-01-22 | 2008-07-31 | Denso Corp | Sound-proof chamber for product evaluation |
| CN201668183U (en) * | 2010-05-11 | 2010-12-15 | 长安大学 | Automatic rotating exhibition stand |
| CN204758788U (en) * | 2015-06-30 | 2015-11-11 | 广东中硕能源科技有限公司 | Motor detection device |
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