BE1030106A1 - Remote-controlled system for analyzing the rotational inertia of products - Google Patents

Abstract

The present invention proposes a remote-controlled system for the analysis of the rotational inertia of products, belonging to the technical field of the measurement of the rotational inertia, comprising Base; support, rotatably connected to Base by a rotating column drive unit, for driving the rotation of the support; clamping unit, to clamp the product to be analyzed; and data acquisition unit, to collect the period signal during the rotation of the product to be analyzed. This system can quickly measure and analyze the rotational inertia of the product and analyze product defects based on the rotational inertia of the product, thereby reducing the inspection and analysis cycle time. .

Description

1 BE2023/5328

Remote-controlled system for analyzing the rotational inertia of products

Technical areas

The invention belongs to the technical field of the measurement of rotational inertia and specifically relates to a remote-controlled system for analyzing the rotational inertia of products.

Background technique

The application of rotational inertia to analyze the properties of objects has been favored by many researchers. As early as 1866, De Volson and others studied the rotational inertia of product surfaces. In 2000, Li-Feng Jiao studied the application of integrated switching Hall effect sensors in measuring the rotational inertia of objects, by measuring the rotation period of a torsion pendulum to obtain the inertia of spin. In 2020, Ren et al. studied the effect of the rotational inertia ratio on the stability of the flywheel rotor system and found that when the operating speed of the flywheel rotor system exceeded the first-order critical speed and that the rotational inertia ratio was close to 1, the stability of the operating condition with a rotational inertia ratio less than 1 was better than that with a rotational inertia ratio greater than 1. In 2021, Xing Tong et al . studied the model-free adaptive recognition of the rotational inertia of the virtual synchronous generator. In 2021, Xing et al. studied the model-free adaptive control of a virtual synchronous generator, and verified that the control method can effectively improve the dynamic performance of the system and the stability of the microgrid. Sun Yanrui et al. have proposed a control algorithm that identifies the value of rotational inertia of the load of the servo system in real time and adjusts the system parameters according to the actual working conditions. The simulation results show that the method has the advantages of fast response, high control accuracy and strong anti-interference ability. It can be seen that the rotational inertia is closely related to the nature of the object, and studying the characteristics of the rotational inertia of the object can provide people with new ideas to solve some practical problems, this which has significant significance for research.

Currently, with the development of Internet of Things technology, people's lives are becoming more and more convenient. Tools of all kinds are getting smarter and more automated. But the detection system for analyzing the rotational inertia of products is not yet perfect. In university physics experiments, the rotational inertia of objects is usually measured using the torsion pendulum method, trilinear pendulum, and acceleration measurement method, which are complicated.

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With the needs of life and industrial production, more and more researchers have proposed corresponding sensing systems around the measurement of rotary inertia according to practical needs. For example, Feng Weizhong studied the measurement of rotor inertia of turbine generator sets, and proposed a solution to the problem of rotor vortex phenomenon that interferes with speed measurement. Ma Yong et al. have designed and developed a system for measuring the weight, center of gravity and rotational inertia of ship models, and have proved through testing that the system has high measurement accuracy and can meet the needs of ship model testing. ship models in a ship model laboratory. Wang Wanjun et al. proposed a system control method based on the definition of rotational inertia with an equivalent inertia as an electrical simulation, and verified the feasibility of the method. For the product fault analysis based on the rotational inertia of the product, the use of the above system and method to characterize whether the product is qualified has the problems of high cost and long testing period.

Content of the invention patent

In order to overcome the aforementioned shortcomings of the prior art, the present invention provides the following remote-controlled system for the analysis of the rotational inertia of products.

In order to achieve the above, the invention proposes the following technical solutions.

Remote-controlled system for analyzing the rotational inertia of products, including:

Base;

Support, placed at the top of said base and connected to said base by means of a rotating column to transport the product to be analyzed by rotation,

Drive unit, for driving said support in a rotational movement,

Clamping unit, fixed on said support to hold the product to be analyzed,

Data acquisition unit, to acquire a period signal during the rotation of the product to be analyzed,

Control unit for receiving the period signal from said data acquisition unit and for calculating the rotational inertia of the product based on said period signal,

A mobile terminal, wirelessly connected to said control unit, for sending control commands to said control unit and for displaying the results of said control unit's calculations.

Preferably, further comprising a support platform, said base being provided on said support platform, said support platform having at least 3 support columns arranged regularly along the circumference at the top, said support having a

3 BE2023/5328 guide slot arranged along the circumference at the base. said support is provided with a guide slot, said upper part of said support column being embedded in said guide slot and abutting against said guide slot.

Preferably, said bottom of said support is further provided with a limiting slot, said base side wall being open along the circumference with an annular slot.

Said drive unit comprises a lifting seat provided inside said base and a driving motor provided on said lifting seat, the output shaft of said driving motor being connected to a driving shaft. generally L-shaped, said L-shaped drive shaft having a transverse axis passing through said annular slot and the top of its longitudinal axis abutting said limiting slot.

Preferably, said data acquisition unit comprises.

electric lifting lever,

Horizontal planks, placed at one end atop said electric lift lever, which begins with a mounting slot along its length.

A telescopic mechanism, placed in said mounting slot

Positioning plate, provided at the other end of said horizontal boards, said telescopic mechanism bringing said positioning plate closer to or away from the top of said support

A photoelectric sensor J1, placed in a mounting hole in said positioning plate and electrically connected to said control unit, said photoelectric sensor J1 being used to collect the rotational speed of the product to be analyzed and to obtain the period signal of the product to be analyzed by means of a rotational speed calculation.

Preferably, said telescopic mechanism comprises a first motor provided at one end of said horizontal Planks, said mounting slot having a wire rod, said wire rod being connected at one end to the output shaft of said first motor and at the other end at the other end of said mounting slot. said first wire machine is screwed to a first slider, said first slider is slidably connected to the side wall of said mounting slot at each end, said first slider is connected to a connecting rod on the near side of said positioning plate, said connecting rod having one end connected to said positioning plate.

Preferably, said rotational inertia Jm is calculated by the following formula

JI

KT where K is the measurement system constant and fn is the rotation period of the product at

4 BE2023/5328 analyze.

Preferably, said clamping unit comprises a plurality of clamping assemblies uniformly arranged along the circumference of said support, each said clamping assembly comprising two support plates, provided facing each other on said side walls of the support a first rotating arm, provided at one end between said two support plates and pivotally connected to said support plate by a first pivot, one of said support plates being externally provided with a second motor driving the rotation said first pivot, said first rotating arm being connected to said support plate by a second motor. The first rotating arm is provided with a rotating slot at the other end.

Second rotating arm, one end being provided in said rotating groove and connected by means of a second rotating arm to said first rotating arm by rotation, said first rotating arm being provided on one side with a third motor for driving said second arm

The second rotating arm is provided with a third motor driving the rotation of said second rotating arm on one side, said second rotating arm being provided with a through slot at the other end.

Electric telescopic rod, provided in said through slot, with a clamping plate attached to its drive end. preferably, further comprising a hydraulic lifting frame, said support platform being provided on said hydraulic lifting frame. said hydraulic lifting frame is placed under the ground, said hydraulic lifting frame lowers said support to a position at ground level when it is necessary to load the product to be analyzed, said hydraulic lifting frame drives said support and the product to be analyzed above it to below the photoelectric cell J1.

Preferably, said control unit comprises a microcontroller U1 and a microcontroller U2, said mobile terminal being a mobile telephone, the microcontroller U1 and the microcontroller U2 being connected for interactive communication via virtual serial ports Q7 and Q8. said photoelectric sensor JI is connected to microcontroller Ul and said microcontroller U2 is wirelessly connected to the mobile telephone via WIFI module J2. said microcontroller Ul is also connected to a 4-digit common anode digital tube DT1, 2 light-emitting diodes Led D1, D2 and 2 control switches B1,

B2, said microcontroller U2 is also connected to 2 switching triodes Q1, Q2.

Preferably, said mobile terminal is provided with a rotation inertia analysis APP,

said APP having a user login module, a parameter setting module, an analysis result display module and a quality operation module.

The remote controlled product rotational inertia analysis system provided by the present invention has the following beneficial effects. The remote-controlled product rotational inertia analysis system provided by the present invention drives the rotation of the support and the product to be analyzed above it by means of the drive unit, collecting the period signal during the rotation of the product to be analyzed by means of the data acquisition unit. The system is simple and inexpensive, and it is easy, efficient and quick to measure and analyze the inertia of a product, and to analyze the defects of a product based on its inertia, which shortens the inspection and analysis cycle.

Description of attached drawings

In order to more clearly illustrate the embodiments of the present invention and its design solutions, the following is a brief description of the accompanying drawings necessary for this realization. The drawings accompanying the following description represent only certain embodiments of the present invention, and other drawings may be obtained therefrom without creative labor for one of ordinary skill in the art.

Fig 1 shows a diagram of the structure of the remote-controlled product rotational inertia analysis system of Embodiment 1 of the present invention,

Fig 2 shows a diagram of the structure of the drive unit,

Fig 3 shows a diagram of the structure of the data acquisition unit,

Fig 4 shows a diagram of the structure of the clamping unit,

Fig 5 shows a diagram of the structure of support2 (underside facing upwards),

Fig. 6 shows a schematic diagram of the operating state of the remote-controlled product rotational inertia analysis system of Embodiment 1 of the present invention,

Fig. 7 shows a block diagram of the hardware of the remote-controlled Product Rotational Inertia Analysis System of Embodiment 1 of the present invention.

Fig. 8 shows a schematic circuit diagram of the remote-controlled Product Rotational Inertia Analysis System of Embodiment 1 of the present invention,

Fig 9 shows the connection interface of Rotary Inertia Analysis APP,

Fig 10 shows the operation interface of rotational inertia analysis APP,

6 BE2023/5328

Fig 11 shows a diagram of the theoretical rotary inertia of three standard rigid bodies rotating around a fixed axis.

Illustrated by the serial numbers of the attached drawings,

Base 1, annular slot 11, support 2, guide slot 21, limiting slot 22, rotating column 3, product to be analyzed 4, drive unit 5, lifting seat 51, drive motor 52, drive shaft L-shaped53, clamping unit 6, support plate 61, first rotating arm 62, second motor 63, second rotating arm 64, third motor 65, electric telescopic rod 66, clamping plate 67, data acquisition unit 7, electric lifting lever 71, horizontal planks 72, mounting slot 73, positioning plate 74, first motor 75, wire rod 76, first slider 77, connecting rod 78, support platform 8, support column 9, hydraulic lifting frame 10.

Specific implementation modalities

In order to enable those skilled in the art to better understand the technical solution of the invention and to be able to implement it, the invention is described in detail below in connection with the drawings and the particular embodiments which show it. accompany. The following embodiments are only intended to more clearly illustrate the technical solutions of the invention and cannot be used to limit the scope of protection of the invention.

In the description of the present invention, it is understood that the terms "center", "longitudinal", "transverse", "length", "length", "length", "length", "length", "length", "length", "length", "length", etc. ", "width", "thickness", "top", "bottom", "front", "rear", "left", "rear", "left", "left", and "left". front", " back", "left", "right", "vertical". ", "horizontal", "top", "bottom", "inner", "outer". "outer", "axial", "radial", "circumferential", etc. are based on orientation or positions indicated in the accompanying drawings. The orientations or positional relationships indicated have the sole purpose of facilitating and simplifying the description of the technical solutions of the invention and do not indicate or imply that the devices or elements mentioned must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

Also, the terms "first", "second", etc. are used for descriptive purposes only and should not be taken to indicate or imply materiality. In describing the invention, it should be noted that, unless expressly stated or otherwise limited, the terms "connected" and "connection" are to be understood in a broad sense, for example as fixed, detachable or integral connections; like connections

7 BE2023/5328 mechanical or electrical; such as mechanical or electrical connections; such as mechanical or electrical connections. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. To one of ordinary skill in the art, the specific meaning of the above terms in the context of the present invention can be understood in light of the specific circumstances. In the description of the invention, unless otherwise indicated, "plurality" means two or more and will not be detailed here.

Example 1

The invention proposes a remote control system for analyzing the rotational inertia of a product, more particularly as represented in FIGS. 1 to 5, comprising a basel, a support2, a rotation column3, a product to be analyzed4, a drive unit5, a tightening unit6, a data acquisition unit7, a control unit and a mobile terminal.

More specifically, the support 2 is placed on top of the base 1 and is rotatably connected to the base 1 by the rotating column 3 to carry the product 4 to be analyzed; the drive unit 5 is used to drive the support 2 in a rotational movement; the clamping unit 6 is placed on the support 2 to clamp the product 4 to be analyzed; the drive unit 5 is used to drive the support 2 in a rotational movement. Data acquisition7 makes it possible to acquire a periodic signal from the product to the rotation of the analyzer 4.

As shown in fig 7, the control unit is used to receive the period signal from the data acquisition unit 7 and to calculate the rotational inertia of the product based on the period signal; the mobile terminal is wirelessly connected to the control unit and is used to send control commands to the control unit and to display the results of the control unit's calculations.

In addition, in order to improve the stability, this embodiment also includes a support platform8, the basel is provided on the support platform8, the top of the support platform8 is evenly provided with at least 3 supporting columns9 along the circumference.

The bottom of the support2 is provided with a guide slot21 along the circumference, the top of the support column9 is recessed in the guide slot21 and abuts against the guide slot21. In this embodiment, the support column9 is at least 3.

The objective of this realization is to analyze the rotational inertia of the product, in order to allow the drive unit 5 to drive the product for a certain time, then to suddenly stop driving and separate from the support 2, as shown in figs 2 and 5, this embodiment is also provided with a slot22 limitation at the bottom of the support 2, the wall

8 BE2023/5328 side of the Basel is circumferentially open with a split ring, the drive unit ments comprises a lifting seat51 arranged in the Basel and a drive motor52 arranged on the Seat51, the output shaft of the drive motor 52 being connected to a drive shaft at L53, the horizontal axis of the drive shaft at L53 passing through the annular groove 11 and the top of its longitudinal axis being connected to the limiting slot 22. In this embodiment, the elevator 51 is hydraulically seated. Before the product performs an inertial movement of the analyzer 4, the elevator 51 rises to insert the top of the longitudinal axis of the L-shaped drive shaft 53 into the limitation of the slot 22 and drive motor 52 drives L-shaped drive shaft 53, which in turn drives support 2 around the column. Rotator 3 rotates, causing rotational movement of the product on support 2 in the analyzer. When it is necessary to separate the L-shaped drive shaft 53 from the bracket 2, the Traction motor 52 stops rotating and the lifting seat 51 drives the drive motor 52 and its drive shaft into made of

L53 down, which separates the L53-shaped drive shaft from bracket 2.

In this embodiment, the data acquisition unit 7 comprises: an electric lifting lever 71; horizontal planks72, provided at one end at the top of the electric lifting lever71, which, along the length of the latter, move inwardly of the unit. starting with mounting slot 73; a telescopic mechanism, placed in the mounting slot 73; a positioning plate74, placed at the other end of the Horizontal Planks72, the telescopic mechanism driving the positioning plate74 The photoelectric sensor J1, placed in the mounting hole of the positioning plate74 and electrically connected to the control unit, is used to collect the rotational speed of the product to be analyzed4 and to obtain the period signal of the product to be analyzed4 by means of the calculation of the rotational speed. . Specifically, the photoelectric sensor J1 in this embodiment is a photoelectric speed sensor, which detects the speed of a rotating object.

Further, in this embodiment, the telescopic mechanism includes a first motor 75 provided at one end of the horizontal Planks 72, a Wire machine 76 provided in the mounting slot 73, the Wire machine 76 is connected to the output shaft of the first motor 75 at one end and horizontal planks 72 at the other end. The Yarn machine 76 is connected to the output shaft of the first motor 75 at one end and at the other end of the horizontal Planks 72 by rotation. slider77 is connected to connecting rod78 on the near side of positioning plate74, the end of connecting rod78 is connected to positioning plate74. electric lifting lever71 is used to adjust the height of the Boards The first motor75 drives the Wire machine 76 in rotation, which makes the first slider77 move horizontally along the Wire machine 76, which drives the first slider77 in the direction of the length.

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The connecting rod 78 moves, which moves the positioning plate 74 away from or closer to the electric lifting lever 71, thus regulating the distance between the photoelectric cell J1 and the product to be analyzed.

Due to the different lengths, volumes, etc. clamped products, in order to accommodate different products, the clamping unit 6 of this embodiment comprises a plurality of clamping assemblies, at least three, provided uniformly along the circumference of the support 2, each clamping assembly comprising: two support plates61, provided opposite to each other on the side walls of the support2 first rotating arm62, provided at one end between the two support plates61 and pivotally connected to the support plate61 by a first pivot , a supported plate] being externally provided with a second motor 63 driving the rotation of the first pivot; the first rotating arm 62 is provided with a rotation groove at the other end; the second rotating arm64, which is provided at one end in the rotating groove and is rotatably connected to the first rotating arm62 by the second rotating arm64, the first rotating arm62 is provided with a third motor65 on one side for driving rotation of the second rotating arm64, the other end of the second rotating arm64 is provided with a through slot; the electric telescopic rod 66 is provided in the through slot and its drive end is connected to the serious plate. The end is connected to a clamping plate 67.

As shown in fig 2, when not in use, several clamping elements are turned outwards, when loading the product to be analyzed on the support2, initially, the second motor63 drives the first arm rotating62 towards the product to be analyzed, and after a certain angle, the third motor65 drives the second rotating arm64 towards the product to be analyzed. After a certain angle of rotation, the telescopes 66 of the rod motor drive the clamping plate 67 outward, while the angle of the main rotary arm 62 and the second rotary arm 64 continue to be adjusted as required, from so that the saw teeth 67 finally completely grip the product to be analyzed.

To facilitate the testing of larger products, in this embodiment the Hydraulic Lifting Frame 10 is also included, the support platform 8 is placed on the Hydraulic Lifting Frame 10; The hydraulic lifting frame10 The hydraulic lifting frame10 is placed under the ground, when it is necessary to load the product to be analyzed4, the hydraulic lifting frame10 lowers the support2 to a position at ground level, during the test, the hydraulic lifting frame10 raises the support2 and the product to be analyzed4 above it up to the photoelectric cell J. of the analyzer4 passes below the photoelectric cell

J1.

In the absence of intervention, the Hydraulic lifting frame 0 is in the retracted position,

10 BE2023/5328 retracting all its upper parts so that they are flush with the ground along the support2, facilitating the loading of the product to be analyzed on the support2 when the product to be analyzed is large.

Fig. 6 shows a diagram of the operating state of the remote-controlled product rotary inertia analysis system of embodiment 1 of the present invention, operating by first loading the product to be analyzed4 onto the holder2 and by clamping the product to be analyzed4 by means of the clamping unit6. The Hydraulic Lifting Frame10 is then activated and the Hydraulic Lifting Frame10 is raised, carrying all the components above it and the product to be analyzed4 up to at a certain height. At this point, the electric lift lever71 raises the

Horizontal boards72 to a position located above the height of the product to be analyzed, then a telescopic mechanism drives the positioning plate74 previously released until the photoelectric cell J1 product to be analyzed4 above. At this moment, the lifting seat51 is activated and the upper end of the L-shaped drive shaft53 is lifted into the limiting slot22 at the bottom of the bracket2, then the drive motor52 is activated to rotate the bracket2, which at in turn rotates the product to be analyzed4. The drive motor 52 is then activated to drive the rotation of the support 2, which in turn drives the product to be analyzed 4 in a rotational movement. When the product to be analyzed4 has moved for a period of time, the Lifting seat51 suddenly drives the L53-shaped drive shaft downward, causing the L53-shaped drive shaft to separate from the support2 , which has the effect that Support2 continues to rotate under the action of inertia. The photoelectric sensor J1 collects the rotational speed signal of the product to be analyzed4 during its inertial movement, and the controller then converts the rotational speed signal into a periodic signal of the rotation of the product to be analyzed4, and the rotational inertia of the product to be analyzed4 is calculated by the periodic signal.

Specifically, in this embodiment, the rotational inertia is calculated by the following formula / „= An

KL

Where K is the measurement system constant and fn is the rotation period of the product to be analyzed4. Specifically, since the rotation speed of the product can be measured by the photoelectric sensor J1, the rotation period of the rotating product can be obtained based on the relationship between rotation and rotation time.

The derivation of the formula for calculating the moment of inertia of rotation is as follows.

When the torsion pendulum method is used to measure rotational inertia, the rigid body is rotated in the horizontal plane after an @. After being trained by the

11 BE2023/5328 moment of elastic reversion of the splinter, the rigid body is rotated reciprocally around a fixed axis in the vertical horizontal plane. According to Hooke's law, the torsional restoring moment of shrapnel is

M = -0 (1),

Where M is the torque, X is the twist coefficient, and @ is the twist angle. According to the law of rotation, there is,

M=la (2), where / is the rotational inertia of a rigid body rotating around a fixed axis and @ is the angular acceleration of the rotation. It is assumed that there is a relationship between the torsion coefficient Æ and the rotational inertia /, x=lo® (3), where © is a constant and the relationship between the angular acceleration of rotation and the angle is the next d°9 = df (4),

Neglecting the resisting moment, the differential equation can be obtained by combining equations (1) to (4) from 9 — + 070 =0 dr (5),

By solving the differential equation (5), we obtain 0 = Acos(ot +9) (6) where A is the amplitude of the vibration, © is the natural frequency and is the initial phase. Then the period is 27

T=— © (7),

According to equation (3) and equation (7), we get the rotational inertia [0 47

K KT” (8) ,

The rotational inertia of an irregularly shaped rigid body is as follows

I= r'Am = |r*dm > i i | (9) ,

Measurement of the constant X.

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The rotational inertia of a standard rigid body about a fixed axis can be calculated from equation (9), as shown in Figure 11, which divides the shape of the product into three types: cylinder (Figure 11a), thin bar (Figure 11b) and sphere (Figure 11c). Let us know the m R; m / ; mass < and the radius '© of the cylinder, the mass ” and the length ” of the thin bar and the mass “'s and the radius K, of the sphere. The theoretical value of the rotational inertia of a cylinder rotating around a central axis perpendicular to its own lower surface is the following 1

J,=—m,RZ 2 (0, where lk and KR are respectively the mass and the base radius of the cylinder.

The theoretical value of the rotational inertia of a thin rod rotating around a central axis 5 2 perpendicular to itself is 1

J =—m1° p 12 pp (1 1), , M / . . . where P and P are the mass and the length of the thin rod respectively.

The theoretical value of the rotational inertia of a sphere rotating around an axis passing through its own spherical center is the following 2 np?

J=—m,R, > (2,

Where "" and K are respectively the mass and the radius of the sphere.

The rotational inertia of a standard rigid body around a fixed axis can be tested by means of a measuring system, for example the period of rotation of a cylinder, a thin bar or a sphere 1P, 1, . Substituting the period in equation (9) and also combining equations (10)-(12), depending on the specific standard rigid body, we get

The rigid body is a cylinder with constant XK

Year'

kt

5m RST 2 (13),

The rigid body is a thin rod with constant XK

Year'

Te mT? 2 (4,

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The rigid body is a sphere and the constant Æ is e=

SRT (15),

Calibration makes it possible to deduce the % constant of the measurement system. Considering the equation (8), the rotational inertia of the product can be obtained by measuring the period Ta of the product which performs an approximate rotation on the torsion pendulum ln (16),

More specifically, in this embodiment, the control unit comprises a U1 microcontroller and a U2 microcontroller, which may be AT51 or

STC89S52, etc. The mobile terminal is a cell phone and the microcontroller U1 and the microcontroller U2 are connected via virtual serial ports Q7 and Q8 for interactive communication. The JI photoelectric sensor is connected to the Ul microcontroller, and the U2 microcontroller is wirelessly connected to the mobile phone via the J2 WIFI module; the mobile terminal is equipped with a rotational inertia analysis APP, which has a user login module, a parameter setting module, an analysis result display module and a quality operation module.

Specifically, as shown in Fig 8, in view of the hardware cost, J1 photoelectric sensor and control using Ul microcontroller signal connection, need to identify J1 photoelectric sensor signal to measure the rotation period of the twisted pendulum, according to the characteristics of the microcontroller, can use the timer and interrupt function to achieve. In order to improve the calculation speed, another microcontroller U2 is used to interact and communicate with the WIFI module J2. The central chip of the wifi module is ESP8266, which in turn interacts and communicates with the mobile phone. In other words, the microcontroller mainly sends data to the mobile phone through the wifi module

ESP8266, and the microcontroller receives information from the mobile phone through the WIFI module.

In the debugging stage, in order to show whether the data is normal, the UI microcontroller is connected to the 4-digit common anode DTI digital tube; in order to check the execution status of the program, the microcontroller Ul is connected to 2 light-emitting diodes

Led D1 and D2, and 2 control switches B1 and B2. Considering that the microcontroller U1 will manage the 2 signals of the switches B1 and B2, in order to simplify the code of the control program and at the same time not to add a new signal input interface to UI. The U2 microcontroller simulates the input of signals from switches B1 and B2 directly

14 BE2023/5328 via the 2 switching triodes Q1 and Q2. Overall, the designed circuit is less expensive, and the structure principle is clear and simple. For example, the digital tube display is driven by a triode, which is less expensive than the digital tube driver circuit part of Tian Ya Nan et al.

Circuit operation process. 1) Power on, the U2 microcontroller gets a communication connection with the mobile phone through the wifi module. 2) Operate the mobile phone APP, the corresponding operation signal is sent to U2 by the wifi module, U2 sends data to Ul by the virtual serial port, or between the switching signal to Ul by Q1 and Q2 . 3) U1 receives the signal from U2 and performs the corresponding operation, such as starting the measurement, turning on and off the indicator light, displaying the digital tube, etc. 4) Ul sends measurement data back to U2 through the serial port after photocell J1 completes its test. 5) U2 sends received data to mobile phone via wifi module. 6) The mobile phone receives the data, processes it accordingly and displays the results.

Specifically, in this embodiment, the mobile terminal has a rotation inertia analysis APP, the APP has a user login module, a parameter setting module, a display of analysis results and a quality operation module.

As shown in Fig 9, for security reasons, the APP rotary inertia analysis starts with entering a login page, which requires a username and password to access the page software testing and analysis (see Figure 10). The APP analysis interface requires inputting the IP address and port first to connect to the test control circuit module via wifi. Since when measuring the rotation period of a torsion pendulum, the total time À of” (722) periods is usually measured and then averaged to obtain the time of a single period, the average period is calculated using the following formula 7 Al n (17),

As shown in figs 9 and 10, the main login screen program must evaluate the username and password entered. If both are correct, it goes to the test page, if not, the prompt "Incorrect username or password, please enter the correct username and password". . WIFI connection requires entering an IP address

15 BE2023/5328 and a port number to establish a service connection.

How does it work.

Before starting the test, you can configure the system by clicking "Set" in the mobile phone application and set the number of measurement cycles, the default is 30 cycles per measurement.

When the test is required, just press "Analyze" in the mobile app to start the test.

In setting mode, the number of measurement cycles can be increased by pressing the "+" button and decreased by pressing the "-" button. When the test is complete, the measurement results are received and displayed.

The specific test procedure is as follows 1) The product under test is clamped through the two clamping plates of the clamping unit and the distance of the positioning plate of the data acquisition unit from the clamping unit is adjusted so that one end of the product to be tested can penetrate deeply into the positioning plate. and is able to protect the JI photocell. 2) Connect the control circuit and its power supply. 3) Open the rotational inertia analysis app on the mobile phone and use the default cycle settings or set the settings yourself. 4) apply a certain torque to the return spring by means of a first motor, so that the product (for example a standard rigid thin bar) is rotated in the horizontal plane by a certain angle, then release the product, which then performs an approximate torsion pendulum rotation around a fixed axis. 5) Click "Start Test" in the mobile phone app and wait for the end of the test to get the rotational inertia result report and whether it is passed. Overall, the test system is simple in structure, does not require large equipment, and has the advantages of easy operation, low power consumption and rapid analysis. Compared with Zhang et al's study, this system adds a mobile phone APP, which makes the test operation easier and more efficient.

When analyzing a product, it suffices to first test the inertia of the standard product, then to test the inertia of the product to be analyzed, and by comparison, to determine whether the threshold value of the inertia of the standard product is outdated.

The invention is based on the calculation theory related to rotational inertia, and designs a system for analyzing the rotational inertia of a low-cost, easy-to-use and efficient remote control product, in order to improve the reference for the need to analyze the rotational inertia of

16 BE2023/5328 products and analyze whether the products have defects in life.

Development of a system control circuit with the C51 microcontroller as the core. Development of a mobile phone APP based on WIFI communication control, providing a reference for the development of other related control APPs. For example: development of applications for mobile phones based on WIFI communication for the control of household appliances (refrigerators, televisions, air conditioners, induction cookers, fluorescent lamps, etc.); development of applications for mobile phones based on WIFI communication for the control of toys (miniature cars, drones, robots, etc.); development of mobile phone applications based on WIFI communication for controlling industrial machinery (industrial spot welding machines, industrial robotic arms, industrial cutting machines, etc.)Provide references for the design of other circuits and programs microcontroller control. For example, the design of a wastewater treatment sensing circuit based on microcontroller technology; the design of a circuit for detecting temperature, humidity and sunlight in a greenhouse based on microcontroller technology; and the design of an obstacle warning circuit in a car based on microcontroller technology. This detection system makes it possible to analyze the rotational inertia of the product, and there are many areas for research and improvement. For example: optimize the program to further improve the efficiency of program execution and reduce system power consumption; increase the functionality of the system (increase the density and volume of products detected, etc.); further optimize the circuit so that the stability of the circuit is improved and the working environment has a wider range of temperature, atmospheric pressure, humidity, etc. and be more applicable.

The system can be practically applied in real life to help detect rotational inertia of certain products (e.g. rods, flywheels, porcelain plates, floor tiles, etc.) to infer the mass distribution of the product, and therefore to characterize whether the product is defective or qualified.

The embodiments described above are only specific best embodiments of the present invention, the scope of protection of the present invention is not limited thereto, and mere variations or equivalent substitutions of technical solutions which would be obvious to anyone skilled in the art within the technical scope disclosed by the present invention are within the scope of the protection of the present invention.

Claims (1)

17 BE2023/5328 Claims 1, Remote-controlled system for analyzing the rotational inertia of products, characterized in that it comprises Base (1). support (2), provided on top of said base (1) and connected to said base (1) by means of a rotating column (3) to carry a product to be analyzed (4) driving unit (5) for drive said support (2) in a rotational movement clamping unit (6), placed on said support (2) to clamp the product to be analyzed (4) data acquisition unit (7) to acquire the period signal during the rotation of the product to be analyzed (4) a control unit for receiving the period signal from said data acquisition unit (7) and for obtaining the rotational inertia of the product on the basis of said period signal. Mobile terminal, wirelessly connected to said control unit, for sending control commands to said control unit and displaying the results of said control unit's calculations. at least 3 support columns (9) are regularly provided along the circumference, said support (2) is provided with a guide slot (21) along the circumference at the lower part, said support column (9) is embedded at the upper part in said guide slot (21) and abuts against said guide slot (21). guide (21). 2, At least 3 support columns (9) are regularly provided along the circumference, said support (2) is provided with a guide slot (21) along the circumference at the lower part, said column support (9) is embedded at the top in said guide slot (21) and abuts against said guide slot (21). guide (21). 3, System for analyzing the rotary inertia of a remote controlled product according to claim 2, characterized in that said support (2) is further provided with a limitation slot (22) at the bottom and said base (1) has an annular slot (11) open in the side wall along the circumference. Said driving unit (5) comprises a lifting seat (51) provided inside said Base (1) and a driving motor (52) provided on said lifting seat (51), said motor 18 BE2023/5328 drive shaft (52) having an output shaft connected to an L-shaped drive shaft (53), said L-shaped drive shaft (53) having a transverse axis passing through said annular slot (11), the top of its longitudinal axis being connected to said limiting slot (22) against said limiting slot. 3, characterized in that said data acquisition unit (7) comprises electric lifting lever (71) horizontal planks (72), placed at one end at the top of said electric lifting lever (71), which starts on its length by a mounting slot (73) Retractable mechanism, placed in said mounting slot (73) Positioning plate (74), placed at the other end of said Horizontal Boards (72), said telescopic mechanism moving towards or away from said positioning plate (74) of said support (2) above a photoelectric sensor (J1), placed in a mounting hole in said positioning plate (74) and electrically connected to said control unit, said photoelectric sensor (J1) for collecting the rotational speed of the product to be analyzed (4) and to obtain the period signal of the product to be analyzed (4) by means of a calculation of the rotational speed. 5, a system for analyzing the rotational inertia of a remotely controlled product according to claim 4, characterized in that said telescopic mechanism comprises a first motor (75) provided at one end of said horizontal boards (72), said mounting slot (73) having a wire machine (76) provided therein. first slider (77) is slidably connected at each end to the side wall of said mounting slot (73), said first slider (77) being connected to the side of said first slider (77) near said positioning plate (74 ) with a connecting rod (78), said positioning plate (74) being connected to the side wall of said mounting slot (73). end of said connecting rod (78) is connected to said positioning plate (74). 6, System for analyzing the rotational inertia of the remotely controlled product according to claim 4, characterized in that said rotational inertia Jm is calculated by the following formula 19 BE2023/5328 Jm "KT. where K is the constant of the measuring system and To is the period of rotation of the product to be analyzed (4). 7, System for analyzing the rotational inertia of a remotely controlled product according to claim 1 , characterized in that said clamp unit (6) comprises a plurality of clamp assemblies uniformly arranged along the circumference of said support (2), each of said clamp assemblies comprising: two support plates (61), provided at opposite each other on the side walls of said support (2), First rotating arm (62), provided at one end between two said support plates (61) and connected to said support plate (61) by means of a first pivot, a said support plate (61) being provided on the outside with a pivot for driving said first pivot second motor (63), said first rotating arm (62) being provided with a slot second rotating arm (64), provided at one end in said rotating groove and connected by means of the second rotating arm (64) to said first rotating arm (62) for rotation, said first rotating arm ( 62) being provided on one side with a third motor (65) for driving said first rotating arm (62) in rotation. third motor (65) driving rotation of said second rotating arm (64) on one side of said first rotating arm (62), said second rotating arm (64) being provided with a through slot at the other end. Electric telescopic rod (66), placed in said through slot, with a clamping plate (67) attached to its drive end. 8. A remote-controlled system for analyzing the rotational inertia of a product according to claim 2, characterized in that it further comprises a hydraulic lifting frame (10), said support platform (8) being provided on said hydraulic lifting frame (10). Said hydraulic lifting frame (10) is placed under the ground, said hydraulic lifting frame (10) lowers said support (2) to a position flush with the ground when it is necessary to load the product to be analyzed (4 ), said hydraulic lifting frame (10) is placed under the ground. a hydraulic lift (10) causes said support (2) and the product to be analyzed (4) located above it to rise below the photoelectric cell (J1) during the test. 20 BE2023/5328 9, System for analyzing the rotary inertia of a remotely controlled product according to claim 2, characterized in that said control unit comprises a microcontroller Ul and a microcontroller U2, said mobile terminal being a telephone mobile, and in that the microcontroller U1 and the microcontroller U2 are connected for interactive communication via virtual serial ports Q7 and Q8. said photoelectric sensor (J1) is connected to the microcontroller U1, said microcontroller U2 is connected to the wireless mobile phone via the WIFI module J2. Said microcontroller Ul is also connected to a 4-digit common anode digital tube DT1, 2 light-emitting diodes Led D1, D2 and 2 control switches B1, B2, said microcontroller U2 is also connected to 2 switching triodes Q1, Q2. 10, The remotely controlled product rotational inertia analysis system according to claim 9, characterized in that said mobile terminal is provided with a rotational inertia analysis APP, said APP having a connection module of module, parameter setting module, analysis result display module and quality operation module.