Portable plum blossom contact finger contact pressure detection device, system and method

Abstract

The invention discloses a portable plum blossom contact finger contact pressure detection device, system and method, and the device comprises a pressure detection device, a data processing device, a wireless transmission module and a mobile equipment end, and is characterized in that the data processing device is connected with the pressure detection device, the pressure detection device detects the pressure of a plum blossom contact, and the wireless transmission module is connected with the mobile equipment end. Transmitting the pressure data to a data processing device; and the data processing device transmits the pressure data to the mobile equipment end through the wireless transmission module, and the intelligent AI diagnosis model of the contact state of the tulip contact of the circuit breaker in the mobile equipment end obtains an overhaul suggestion of the tulip contact of the circuit breaker after training the pressure data.

Description

Technical Field

[0001] The invention relates to the technical field of plum blossom stylus finger contact pressure measurement equipment, in particular to a portable plum blossom stylus finger contact pressure detection device, system and method. Background Art

[0002] For the pressure test of plum blossom contact fingers, pressure sensors are generally used for measurement. The existing technology cannot make the pressure test device fully contact the plum blossom contact fingers after the diameter is expanded, and the accuracy of the measurement data is poor. In addition, the system of the existing pressure detection device does not perform effective sample analysis, resulting in inaccurate and incomplete diagnostic opinions. In addition, for the mechanical structure design of the pressure detection device, the ultimate pressure that the mechanical structure can bear is not fully considered, which can easily cause damage to the mechanical structure during the measurement process. People have conducted a lot of research on this. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a portable plum blossom contact finger contact pressure detection device, system and method, which can solve the above-mentioned problems in the prior art.

[0004] The present invention is realized through the following technical scheme: a portable plum blossom contact finger contact pressure measurement system of the present invention comprises a pressure detection device, a data processing device, a wireless transmission module and a mobile device end, characterized in that the data processing device is connected to the pressure detection device, the pressure detection device detects the pressure of the plum blossom contact and transmits the pressure data to the data processing device; the data processing device transmits the pressure data to the mobile device end through the wireless transmission module, and the circuit breaker plum blossom contact contact state intelligent AI diagnosis model in the mobile device end obtains maintenance suggestions for the circuit breaker plum blossom contact after training the pressure data.

[0005] A further technical solution is that after the mobile device obtains the corresponding steady-state contact pressure of the plum blossom contact, the measurement result is quantified using the average value, standard deviation and variance of this pressure measurement as well as the average value, standard deviation and variance of historical measurements to obtain an evaluation result, and it is displayed on the display screen of the mobile device.

[0006] According to a further technical solution, the pressure detection device comprises three resistance strain type pressure sensors, a housing and a radial telescopic mechanism, and the resistance strain type pressure sensors are arranged in the housing.

[0007] A further technical solution is that the radial telescopic mechanism includes a rack base, a gear ring base, three racks, three rack radial grooves, three rack bases, gear rings and a tray, the rack base is arranged on the lower side of the outer shell, a gear ring is fixedly arranged on the upper side of the tray, the gear ring base is rotatably connected to the gear ring base on the upper side through a bearing, three rack radial grooves are arranged above the gear ring base, the rack is slidably connected to the rack radial grooves, and the rack is fixed to the rack base.

[0008] According to a further technical solution, a pressure sensor positioning groove is provided in the rack base, and the resistance strain type pressure sensor is installed in the pressure sensor positioning groove.

[0009] According to a further technical solution, the gear ring presents an Archimedean spiral structure, and its spiral shape meshes with the arc-shaped teeth at the bottom of the rack.

[0010] A method for calculating the total contact force F of a plum blossom contact, including the pressing force of the Archimedean thread on the end face of the gear ring on the rack and the action and reaction force from the housing, when the positive pressures on points A and B are N respectively A 、N B The corresponding friction forces are F NA =f NA 、F NB =f NB , the mechanical equilibrium equation of the rack is:

[0011]

[0012] From the above formula, we can get:

[0013]

[0014] Take the inner diameter of the Archimedean spiral thread at the bottom of the gear ring as R, and the outer diameter as R. Since P'=P, the following formula is obtained:

[0015]

[0016] Among them, F k is the reaction force on a single rack; θ is the tooth angle of the Archimedean helix thread of the gear ring; R 1 R is the inner diameter of the gear ring thread, 2 is the outer diameter of the gear ring thread, n is the number of racks, and f is the friction coefficient between the rack and the gear ring.

[0017] A method for training an AI diagnostic model for a circuit breaker maintenance plan comprises an intelligent AI diagnostic model for the contact state of a circuit breaker plum blossom contact, the intelligent AI diagnostic model learns pressure data of unqualified contact pressure, and intelligently outputs a corresponding circuit breaker maintenance plan, characterized in that, in the first step, health levels corresponding to different circuit breaker plum blossom contact clamping force measurement values ​​are set; a training data set is constructed, specifically including different pressure values ​​and corresponding health levels; in the second step, an LSTM model is used to train and learn the training data set, and a health level capable of identifying different plum blossom contact clamping force values ​​is constructed; in the third step, the intelligent AI diagnostic model for the contact state of the circuit breaker plum blossom contact is encapsulated in the torch.nn..Module model format, and the encapsulated model is loaded and transplanted to a mobile device.

[0018] As a further technical solution, the intelligent AI diagnosis model adopts LSTM long short-term memory network.

[0019] As a further technical solution, LSTM analyzes and predicts the operating status of the equipment to obtain the changing trend of the contact pressure.

[0020] The beneficial effects of the present invention are as follows: the present invention proposes a portable plum blossom contact finger contact pressure measurement system, which is composed of a pressure detection device, a data processing device, a wireless transmission module and a mobile device, and realizes real-time and efficient transmission of pressure data through Bluetooth wireless technology. After obtaining the steady-state contact pressure, the mobile device can intuitively display the measurement results after quantitative evaluation, so that decision makers can quickly understand the status of the equipment and further evaluate the stability and consistency of the pressure measurement. In addition, the system supports the use of tablet devices to run AI models to achieve deeper data analysis and real-time feedback.

[0021] The second embodiment optimizes the core components of the system, introduces three resistance strain gauge pressure sensors evenly distributed along the axial direction, and combines the housing and the unique radial telescopic mechanism to enable the device to accurately measure the pressing force of plum blossom contacts of different sizes and accurately adjust the diameter during rotation adjustment. This design significantly improves the measurement accuracy and versatility.

[0022] In Example 3, an intelligent AI diagnosis model was established by learning the contact pressure of the circuit breaker plum blossom contacts based on an artificial intelligence model (such as LSTM). The model can efficiently identify the health level corresponding to different clamping force states, and intelligently output the corresponding maintenance plan according to the actual operation of the circuit breaker, greatly improving the efficiency of maintenance work and the accuracy of prediction.

[0023] Embodiment 4 provides more details to calculate the theoretical formula for the total contact force of the plum blossom contact; by comprehensively considering the role of the gear ring thread boost and the clamping reaction force, the design and practical application of the pressure detection device can be further optimized to ensure that there is no additional risk of damage to the mechanical equipment during the measurement process. This calculation method can more accurately evaluate the contact strength and provide a strong basis for structural design.

[0024] In summary, the overall technical effects of the present invention are mainly reflected in:

[0025] Through the integrated portable measurement system and high-precision data processing and analysis, efficient and accurate measurement of the contact pressure of the circuit breaker plum blossom contacts is achieved; through the artificial intelligence-assisted diagnosis model, maintenance plans can be adaptively formulated to improve the operation and maintenance efficiency and safety of electrical equipment; at the same time, the optimized pressure detection device design ensures the safety and reliability of the equipment during the measurement process and avoids the risk of damage to the mechanical structure; these innovative solutions are jointly committed to improving the maintenance level of power system equipment, extending equipment life, and ensuring the stable operation of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] For ease of explanation, the present invention is described in detail with reference to the following specific embodiments and accompanying drawings.

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0028] Figure 2 This is an operation flow chart of measuring the contact pressure of the stylus finger according to the present invention;

[0029] Figure 3 It is a schematic diagram of the operation of the portable stylus contact pressure measuring device of the present invention;

[0030] Figure 4 It is a schematic diagram of the three-dimensional structure of the pressure detection device of the present invention;

[0031] Figure 5 It is a structural schematic diagram of the radial telescopic mechanism in the pressure detection device of the present invention;

[0032] Figure 6 It is a structural schematic diagram of the gear ring and the tray in the pressure detection device of the present invention;

[0033] Figure 7 It is a force analysis diagram of the radial expansion mechanism in the pressure detection device of the present invention;

[0034] Figure 8 It is a schematic diagram of the structure of the housing and the pressure sensor in the pressure detection device of the present invention;

[0035] Figure numerals: 1. pressure detection device; 2. data processing device; 3. mobile device end; 4. wireless transmission module; 5. trolley circuit breaker; 6. plum blossom contact; 21. gear ring base; 22. rack; 23. rack radial groove; 24. pressure sensor positioning groove; 25. rack base; 26. gear ring; 27. tray; 28. housing; 29 pressure sensor. DETAILED DESCRIPTION

[0036] like Figure 1-Figure 8 As shown, the present invention is described in detail. For the convenience of description, the directions mentioned below are defined as follows: the up, down, left, right, front and back directions mentioned below are Figure 1 The up-down, left-right, front-back directions of the projection relationship itself are consistent.

[0037] Embodiment 1, a portable plum blossom contact finger contact pressure measurement system of the present invention comprises a pressure detection device 1, a data processing device 2, a wireless transmission module 3 and a mobile device end 4, the data processing device 2 and the pressure detection device 1 are connected, the pressure detection device 1 detects the pressure of the plum blossom contact and transmits data through a data line; the data processing device 2 adopts Bluetooth wireless transmission technology to transmit the pressure data to the mobile device end 4 through the wireless transmission module 3.

[0038] Advantageously, after the mobile device 4 obtains the corresponding steady-state contact pressure of the plum blossom contact, the measurement result is quantified using the average value, standard deviation and variance of the current pressure measurement and the average value, standard deviation and variance of historical measurements to obtain an evaluation result, which is displayed on the display screen of the mobile device 4.

[0039] Advantageously, the mobile device 4 may be a tablet, which is a prior art and can run AI models or other operating programs.

[0040] Embodiment 2: Embodiment 2 further limits Embodiment 1. The pressure detection device 1 includes three resistance strain type pressure sensors 29 evenly distributed along the axial direction, a housing 28 and a radial telescopic mechanism. The resistance strain type pressure sensor 29 is arranged in the housing 28. By adopting the resistance strain type pressure sensor 29, the accuracy of the clamping force measurement can be guaranteed. The housing 28 is made of 6061 aluminum alloy.

[0041] Advantageously, the radial telescopic mechanism includes a rack base 25, a gear ring base 21, three racks 22, three rack radial grooves 23, three rack bases 25, a gear ring 26 and a tray 27, wherein the rack base 25 is arranged on the lower side of the shell 28, the gear ring 26 is fixedly arranged on the upper side of the tray 27, the gear ring 26 is rotatably connected to the gear ring base 21 on the upper side through a bearing, three rack radial grooves 23 are arranged above the gear ring base 21, the rack 22 is slidably connected to the rack radial grooves 23, and the rack 22 is welded under the rack base 25.

[0042] Advantageously, a pressure sensor positioning groove 24 is provided in the rack base 25 , and a resistance strain type pressure sensor 29 is installed in the pressure sensor positioning groove 24 .

[0043] Advantageously, the gear ring 26 presents an Archimedean spiral structure, and its spiral shape meshes with the arc-shaped teeth at the bottom of the rack 22. After the gear ring 26 rotates, the rack 22 can be telescoped and moved within the rack 23, thereby causing the resistance strain pressure sensor 29 to telescope and move radially along with the rack base 25 and the housing 28, thereby realizing the diameter expansion function.

[0044] Advantageously, the expression of the Archimedean spiral of the ring gear 26 is:

[0045] ρ=aθ

[0046] Among them, ρ is the distance between the moving point and the origin; a is the distance the moving point moves radially when it rotates one circle; θ is the angle of rotation of the moving point. Since the rack 22 is restricted by the rack radial groove 23 and the gear ring 26, when the tray 27 is rotated counterclockwise to make the gear ring 26 do a circular motion, the rack 22 cooperates with the gear ring 26 to move radially outward, and the rack 22 drives the rack base 25 to move radially to achieve diameter expansion. The diameter of the pressure detection device 1 after the diameter expansion is consistent with the measured diameter of the moving contact of the plum blossom contact 5.

[0047] Embodiment 3, based on embodiment 1, further defines an AI diagnostic model training method for a circuit breaker maintenance plan, including learning pressure data of unqualified contact pressure according to an intelligent AI diagnostic model of the contact state of the circuit breaker plum blossom contacts, and intelligently outputting a corresponding circuit breaker maintenance plan.

[0048] Beneficially, the intelligent AI diagnosis model can adopt LSTM, which is a special recursive neural network RNN ​​used to process and predict sequence data. Unlike traditional RNN, LSTM can effectively handle long-term dependency problems in long sequences and avoid the problem of gradient disappearance or explosion. It stores and updates information through "memory units", including forget gates, input gates and output gates to manage the flow of information.

[0049] Advantageously, an intelligent AI diagnostic model for the contact status of the circuit breaker plum blossom contacts is constructed, which specifically includes the following steps: the first step is to set the health level corresponding to different circuit breaker plum blossom contact clamping force measurement values; to construct a training data set, specifically including different pressure values ​​and the corresponding health levels; the second step is to use an LSTM model to train and learn the training data set to construct a health level that can identify different plum blossom contact clamping force values; the third step is to encapsulate the intelligent AI diagnostic model of the circuit breaker plum blossom contact contact status in the torch.nn..Module model format, and load and transplant the encapsulated model into the mobile device 4.

[0050] Advantageously, the role of LSTM in predicting the contact pressure and contact health status of the circuit breaker plum blossom contact includes: LSTM can be used to analyze and predict the operating status of the equipment. The operating data of such equipment is usually time series data, such as the changing trend of contact pressure, so LSTM is suitable for processing such data.

[0051] Embodiment 4 further defines a method for calculating the total contact force F of the plum blossom contact on the basis of Embodiment 2, including the pressing force of the Archimedean thread on the end face of the gear ring 26 on the rack 22 and the action and reaction force from the housing 28. The force on the rack 22 is as follows: Figure 7 As shown in the figure, when the radial expansion mechanism expands the diameter of the circuit breaker plum blossom contact, the arc of the clamping bar is subjected to the effective radial thrust force Р of the Archimedean spiral thread on the end face of the gear ring and the clamping reaction force F, so that the rack tends to move radially outward, and the points A and B above and below the I-shaped guide rail of the gear ring base are subjected to the pressure of the contact point of the Archimedean spiral thread on the end face of the gear ring. Assume that the positive pressures on points A and B are N respectively. A 、N B The corresponding friction forces are F NA =f NA 、F NB =f NB , its size and position are as follows Figure 7 As shown. The mechanical equilibrium equation of the rack can be expressed as:

[0052]

[0053] From the above formula, we can get:

[0054]

[0055] Take the inner diameter of the Archimedean spiral thread at the bottom of the gear ring as R1 and the outer diameter as R2. Since P'=P, the following formula is obtained:

[0056]

[0057] Among them, F k is the reaction force on a single rack; θ is the tooth angle of the Archimedean helix thread of the gear ring; R 1 R is the inner diameter of the gear ring thread, 2 is the outer diameter of the gear ring thread, n is the number of racks, and f is the friction coefficient between the rack and the gear ring.

[0058] By calculating the total contact force F of the plum blossom contacts, the strength of the maximum force acting on the mechanical structure can be further determined, which is convenient for specific structural design. On the other hand, it can avoid measuring excessive contact pressure of the plum blossom contacts, which may cause damage to the mechanical structure.

[0059] The present invention as a whole is used in the following manner during specific use: the first step is to select the corresponding pressure detection device 1 according to the model of the switch cabinet circuit breaker during on-site maintenance, and to perform zeroing operation on the instrument; the second step is to insert the pressure detection device 1 into the plum blossom contact 6, expand the diameter of the pressure detection device 1, and allow the pressure sensor 29 in the pressure detection device 1 to collect pressure data at the corresponding position; the third step is for the data processing device 2 to convert the pressure signal, and transmit the information to the mobile device 4 through the wireless transmission module 3 to display the pressure data; the fourth step is for the mobile device to The measured information of the plum blossom contact, such as the operation and maintenance unit, maintenance time, power station, model, manufacturer, and production date, is input and stored on the standby end 4; in the fifth step, the mobile device end 4 compares the pressure data of the six plum blossom contacts of the three phase sequences of A, B, and C horizontally and calls the local database of the tablet to vertically compare the contact pressure of the plum blossom contacts during previous maintenance, and then trains the built-in intelligent AI diagnosis model of the contact status of the circuit breaker plum blossom contact of the mobile device end 4, so as to obtain the maintenance suggestions for the circuit breaker plum blossom contact 6; in the fifth step, the pressure detection device 1 is reduced in diameter, and the device is pulled out from the plum blossom contact 6 to end the measurement.

[0060] Advantageously, if the technical solution of the second embodiment is adopted, the pressure detection device 1 adopts counterclockwise rotation of the tray 27 to achieve diameter expansion, and clockwise rotation of the tray 27 to achieve diameter reduction.

[0061] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the present invention; therefore, the protection scope of the present invention should be based on the protection scope defined in the claims.

Claims

1. A portable plum blossom finger contact pressure detection system, comprising a pressure detection device (1), a data processing device (2), a wireless transmission module (3) and a mobile device (4), characterized in that: The data processing device (2) is connected to the pressure detection device (1), the pressure detection device (1) detects the pressure of the plum blossom contact and transmits the pressure data to the data processing device (2); the data processing device (2) transmits the pressure data to the mobile device (4) via the wireless transmission module (3); the circuit breaker plum blossom contact contact state intelligent AI diagnosis model in the mobile device (4) obtains maintenance suggestions for the circuit breaker plum blossom contact (6) after training the pressure data.

2. A portable plum blossom stylus contact pressure detection device, system and method according to claim 1, characterized in that: After the mobile device (4) obtains the corresponding plum blossom contact steady-state contact pressure, the measurement result is quantified using the average value, standard deviation and variance of the current pressure measurement and the average value, standard deviation and variance of historical measurements to obtain an evaluation result, which is then displayed on the display screen of the mobile device (4).

3. A device for a portable plum blossom stylus contact pressure detection system as claimed in claim 1, characterized in that: The pressure detection device (1) comprises three resistance strain type pressure sensors (29), a housing (28) and a radial expansion mechanism. The resistance strain type pressure sensor (29) is arranged in the housing (28). The radial expansion mechanism comprises a rack base (25), a gear ring base (21), three racks (22), three rack radial grooves (23), three rack bases (25), a gear ring (26) and a tray (27). The rack base (25) is arranged on the lower side of the housing (28). The gear ring (26) is fixedly arranged on the upper side of the tray (27). The gear ring base (21) is rotatably connected to the gear ring base (21) on the upper side of the gear ring (26) via a bearing. Three rack radial grooves (23) are arranged above the gear ring base (21). The rack (22) is slidably connected to the rack radial grooves (23). The rack (22) is fixed to the rack base (25).

4. The portable plum blossom stylus contact pressure detection system according to claim 3, characterized in that: The gear ring (26) presents an Archimedean spiral structure, and its spiral shape meshes with the arc-shaped teeth at the bottom of the rack (22).

5. A method for calculating the total contact force F of the plum blossom contact as claimed in claim 3, characterized in that: The pressure force of the Archimedean thread on the end face of the gear ring (26) on the rack (22) and the action and reaction forces from the housing (28) are also included, and the positive pressures on points A and B are respectively N A 、N B The corresponding friction forces are F NA =f NA 、F NB =f NB , the mechanical equilibrium equation of the rack (22) is: The inner diameter of the Archimedean spiral thread at the bottom of the gear ring (26) is R(1), and the outer diameter is R(2). Since P'=P, the following formula is obtained: Take the inner diameter of the Archimedean spiral thread at the bottom of the gear ring as R, and the outer diameter as R. Since P'=P, the following formula is obtained: Among them, F k is the reaction force on a single rack; θ is the tooth profile angle of the Archimedean spiral thread of the gear ring (26); R1 is the inner diameter of the gear ring thread, R2 is the outer diameter of the gear ring thread, n is the number of racks, and f is the friction coefficient between the rack and the gear ring.

6. An AI diagnostic model training method for the portable plum blossom stylus contact pressure detection system as claimed in claim 1, characterized in that: The invention comprises an intelligent AI diagnosis model according to the contact state of the circuit breaker plum blossom contact, the intelligent AI diagnosis model learns the pressure data of unqualified contact pressure, and intelligently outputs the corresponding circuit breaker maintenance plan, characterized in that the first step is to set the health level corresponding to the measurement value of the clamping force of the circuit breaker plum blossom contact; construct a training data set, which specifically includes different pressure values ​​and the corresponding health level; the second step is to use the LSTM model to train and learn the training data set, and construct a health level that can identify different plum blossom contact clamping force values; the third step is to encapsulate the intelligent AI diagnosis model of the contact state of the circuit breaker plum blossom contact in the torch.nn..Module model format, and load and transplant the encapsulated model into the mobile device end (4).

7. The AI ​​diagnostic model training method according to claim 6, characterized in that: The intelligent AI diagnosis model uses LSTM long short-term memory network.

8. The AI ​​diagnostic model training method according to claim 6, characterized in that: LSTM analyzes and predicts the operating status of the equipment to obtain the changing trend of the contact pressure.

9. A working method for the portable plum blossom stylus contact pressure detection system as claimed in claim 1, characterized in that: The first step is to select a corresponding pressure detection device (1) according to the model of the switch cabinet circuit breaker during on-site maintenance, and to perform a zero adjustment operation on the instrument; the second step is to insert the pressure detection device (1) into the plum blossom contact (6), expand the diameter of the pressure detection device (1), and allow the pressure sensor (29) in the pressure detection device (1) to collect pressure data at the corresponding position; the third step is for the data processing device (2) to convert the pressure signal, and transmit the information to the mobile device (4) through the wireless transmission module (3) to display the pressure data; the fourth step is to input and store the measured pressure data on the mobile device (4). The information of the plum blossom contact such as the operation and maintenance unit, maintenance time, power station, model, manufacturer, and production date of the plum blossom contact is obtained; in the fifth step, the mobile device (4) compares the pressure data of the six plum blossom contacts of the three phase sequences A, B, and C horizontally and calls the local database of the tablet to compare the contact pressure of the plum blossom contact (6) during previous maintenance vertically, thereby training the circuit breaker plum blossom contact contact state intelligent AI diagnosis model built into the mobile device (4), thereby obtaining maintenance suggestions for the circuit breaker plum blossom contact (6); in the fifth step, the pressure detection device (1) is reduced in diameter and the device is pulled out from the plum blossom contact (6) to end the measurement.

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