Smart Motor Junction Box Integrated Multi-Parameter IoT Sensor

Abstract

The present invention proposes an integrated multi-parameter IoT sensor for an intelligent motor junction box, which belongs to the field of intelligent manufacturing technology. It includes an integrated sensor, a current transformer, a voltage transformer, a temperature probe, a motor terminal, a motor junction box, an IoT terminal, etc. According to the internal structural characteristics of the motor junction box, the voltage transformer, the current transformer and the temperature probe are designed into an integrated sensor using the motor terminal, and other parameter sensors and IoT terminals are reasonably configured and pre-installed in the motor junction box. Without changing the structure of the motor, the integrated installation of most multi-parameter sensors for motor operation can be realized, effectively reducing the cost of upgrading and transformation, and realizing the integration, miniaturization, modularization, compatibility, convenience, flexibility, reliability, safety, etc. of sensors and other equipment required for the intelligent motor system. An IoT sensor platform for motor operation big data has been established, which can be widely applied to various types of small and medium-sized motors.

Description

Technical Field

[0001] The present invention relates to a motor Internet of Things sensor, in particular to an integrated, intelligent motor multi-parameter Internet of Things sensor integrated in a motor junction box, belonging to the field of intelligent manufacturing technology. Background Art

[0002] With the development of information technology and the recent proposal of intelligent manufacturing, the intelligence of electrical equipment is the mainstream trend of future development, and the corresponding intelligent online monitoring of electrical equipment plays an increasingly important role. In the operation of the motor, including the monitoring of power quality, intelligent operation fault diagnosis and intelligent control of the motor, all rely on the online real-time collection of motor operating parameters and the accumulation of operation big data, while the current mainstream technology is not integrated with the motor and is only installed when needed. Moreover, firstly, discrete sensors are used, and secondly, different systems have independent sensors, which have many defects such as large size, high cost, and poor intelligence. The intelligent motor system is an important foundation for realizing intelligent manufacturing and intelligent factories, and the intelligent motor Internet of Things sensor is the most important hardware platform for the intelligent motor system.

[0003] At present, the operation monitoring of motors is mainly aimed at large motors or special motors, and multiple split devices and temporary installation modes are adopted. The monitoring of motor electrical parameters is the most common, which requires the collection of real-time operating voltage and current signals of the motor. For example, the Chinese patent "Neutral point junction box for high-voltage flameproof motors" (application number: 201120309600.8) proposes a "direct connection between the current sensor in the box and the motor terminal, without the need to connect the current sensor to the terminal, and directly output the secondary signal of the current sensor". It mentions that the current sensor is directly installed in the junction box, but the neutral point connection method is only applicable to the star connection method of the motor. The placement of the current sensor does not make full use of the motor's terminal, resulting in a large space occupied by the junction box, and the device can only collect the phase current signal of the motor. The monitoring parameters are too single, and the motor operation status cannot be fully understood by relying solely on current information, which is not universal. Another example is the Chinese patent "A junction box for monitoring motor operation data" (application number: 201120133292.8) which proposes "a junction box for monitoring motor operation data, which has high integration and can detect the vibration, temperature and current of the motor, realize monitoring and convenient inspection, and can output alarms". It only mentions the use of current sensors in conjunction with terminal blocks, but does not disclose the specific installation structure and installation method. Under normal circumstances, the terminal blocks are relatively short and general sensors cannot be installed. Therefore, it cannot be directly realized without creative and reasonable improvements to the terminal blocks, terminal sockets and various sensors.

[0004] The Chinese patent "Integrated Motor Intelligent Big Data Online Monitoring Device" (application number: 201710259101.4) applied by the inventor of this application proposes "including current acquisition module, voltage acquisition module, temperature acquisition module, speed acquisition module, environmental parameter acquisition module, data analysis and processing module, calendar module, storage module, communication module and power supply module. The device is installed when the motor leaves the factory and integrated with the motor to collect various operating parameters of the motor and send them to the data analysis and processing module for analysis and processing, so as to establish a large database of real-time operating parameters of the motor". However, the structure and specific installation method of each sensor are not disclosed. Since the space inside the motor junction box is narrow and has a strong electric circuit, the sensors also need to be reasonably installed to obtain real and accurate signals, etc., it is also necessary to solve the problems of special structural design and reasonable assembly of multiple sensors. Summary of the invention

[0005] In order to overcome the shortcomings of the prior art, the present invention provides an integrated multi-parameter Internet of Things sensor for an intelligent motor junction box. According to the internal structural characteristics of the motor junction box, the voltage transformer, current transformer and temperature probe are designed as integrated sensors, and other parameter sensors and Internet of Things terminals are reasonably configured and pre-installed in the motor junction box, which solves the problems of special structural design and reasonable assembly of multi-parameter sensors of intelligent motor systems. The integration, miniaturization and modularization of sensors and other equipment required for intelligent motor systems, as well as compatibility, convenience, flexibility, reliability and safety are required. A new idea is provided for the realization of intelligent motor systems. At the same time, it is also convenient to upgrade and install the motors in operation, effectively reducing the cost of upgrading and transformation, which is very beneficial to the promotion of intelligent motors. The intelligent online monitoring and big data collection of motors are realized, and it has many advantages such as simple structure, live monitoring, easy use and low cost.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] The intelligent motor junction box integrated multi-parameter Internet of Things sensor includes an integrated sensor, a current transformer, a voltage transformer, a conductive sheet, a temperature probe, a current limiting resistor slot, a current limiting resistor, a temperature probe slot, a current output terminal, a voltage output terminal, a temperature sensor output terminal, a conductive sheet lead-out terminal, a neutral line input terminal, a power supply line, a first input terminal of a voltage transformer, a second input terminal of a voltage transformer, a motor terminal, a connecting sheet, a motor junction box, an Internet of Things terminal, a motor junction box cover, and an antenna.

[0008] The integrated sensor is made of current transformer, voltage transformer and conductive sheet cast by insulating materials such as epoxy resin. Due to space limitations, the current transformer is preferably an oblate structure. The conductive sheet is a bare metal sheet located on the upper part of the current transformer and isolated from the current transformer by an insulating layer.

[0009] The voltage transformer is located on the side of the current transformer, and there is a current limiting resistor slot between the two, which is located on the upper surface of the integrated sensor. The current limiting resistor is installed in the current limiting resistor slot, and can also be installed in other parts. The main thing is to ensure a compact structure and easy installation.

[0010] There is a temperature probe slot at the bottom of the voltage transformer, located on the lower surface of the integrated sensor, and the temperature probe is installed in the temperature probe slot. Generally, the contact type uses a thermal resistor such as PT100, and other types of temperature sensors can also be used as needed, such as non-contact infrared temperature probes.

[0011] The integrated sensor is provided with a current output terminal and a voltage output terminal, which use double terminals or shielded twisted pairs to lead out the signals of the current transformer and the voltage transformer respectively, and the temperature sensor output terminal uses a shielded twisted pair to lead out the signal of the temperature probe; the integrated sensor has a conductive sheet lead-out terminal, which uses a single terminal or a shielded soft wire to lead out the voltage of the conductive sheet; and a neutral line input terminal, which uses a single terminal or a shielded soft wire to lead in the neutral line of the power supply line. All of the above terminals are fixed on the surface of the integrated sensor, and are reasonably configured to avoid mutual interference and facilitate wiring. In addition, the outgoing wires are all shielded wires to effectively improve the anti-interference ability.

[0012] The first input terminal of the voltage transformer is connected to the conductive sheet via a current limiting resistor, and the second input terminal of the voltage transformer is connected to the neutral line input terminal; the strong voltage signal is converted into a weak current signal through the current limiting resistor to provide a voltage signal for the voltage transformer.

[0013] The integrated sensor uses the current transformer and the through hole in the middle of the conductive sheet to be mounted on the motor terminal, and the temperature probe installed on the lower surface is in close contact with the connecting sheet. This structure and assembly method can easily obtain accurate current, voltage and temperature signals.

[0014] Three integrated sensors are installed on the three motor terminals of the three phases inside the motor terminal box, so that the three phases can be monitored simultaneously.

[0015] The IoT terminal is fixed on the inner surface of the motor junction box cover, and the antenna is led out from the motor junction box cover to the outside; the IoT terminal obtains power from the conductive sheet lead-out terminal and the neutral line of the power supply line, and obtains three-phase current, voltage and temperature signals from the current output terminal, voltage output terminal and temperature sensor output terminal of the three integrated sensors. After calculation, analysis and processing, the antenna is used to exchange data with external devices. Thus, an integrated IoT sensor for the intelligent motor system is formed. The IoT terminal can also be installed on the outside of the motor junction box, but the integration is relatively poor, and special protection and fixation are required.

[0016] The current transformer is an oblate structure with an inner diameter slightly larger than the diameter of the motor terminal, and the conductive sheet is an exposed hollow annular metal sheet;

[0017] The wires connected to the current limiting resistors are shielded wires;

[0018] The first input end of the voltage transformer and the second input end of the voltage transformer are fixed on the integrated sensor with a single terminal and are led out in a shielded wire manner.

[0019] Furthermore, the intelligent motor junction box integrated multi-parameter Internet of Things sensor includes a power module, which is fixed on the inner surface of the motor junction box cover, obtains AC power through the conductive sheet lead-out terminal and the neutral line input terminal, converts it into standard DC, and then powers the Internet of Things terminal.

[0020] Furthermore, the intelligent motor junction box integrated multi-parameter Internet of Things sensor includes a display module, which is fixed on the outer surface of the motor junction box cover to provide data display for the Internet of Things terminal.

[0021] Furthermore, the outer surface of the integrated sensor has a current direction mark to avoid wrong connection direction during installation, which results in failure to obtain correct current signals and temperature signals.

[0022] Furthermore, the IoT terminal is installed in a shielding shell. When the IoT terminal is installed inside the motor junction box, since there are strong currents such as power lines around it, in order to improve electromagnetic compatibility, a shielding shell is required for protection.

[0023] Furthermore, when the integrated sensor is installed on the motor terminal, the power supply line, integrated sensor, connecting piece, and motor winding line are installed in order from top to bottom, and nuts are used to fix and tighten them in the middle. First, it is ensured that the current flows through the middle of the current transformer, second, the conductive sheet can obtain a stable and reliable voltage from the motor terminal through the nut, and third, the temperature probe can obtain accurate temperature information from the connecting piece. Thereby achieving high integration and reliability of the integrated sensor.

[0024] Furthermore, all the wires of the integrated sensor that are not connected to the outside are encapsulated inside by insulating materials, which simplifies the external structure, avoids secondary wiring during installation, and avoids interference, while ensuring the stability and reliability of long-term operation.

[0025] Furthermore, the conductive sheet is a structure in which two upper and lower rings and a hollow semi-cylinder are integrated into one body, and is mounted on the position of the current transformer of the integrated sensor, and the through hole between the upper and lower rings overlaps with the through hole of the current transformer. This ensures that the integrated sensor will not be damaged when the nut is used for fixing and tightening, and further improves the reliability of power supply.

[0026] Furthermore, it includes a speed sensor, a vibration sensor, a winding temperature sensor, and an environmental parameter sensor; the speed sensor is installed on the main shaft inside the motor to measure the real-time speed of the motor, the vibration sensor is fixed on the side wall of the motor junction box cover to measure the vibration data of the motor; the winding temperature sensor is installed in the winding of the motor to measure the winding temperature of the motor, and the environmental parameter sensor is installed on the outer surface of the motor junction box cover to measure the ambient temperature, humidity, dust concentration and air pressure of the motor; the signals measured by the speed sensor, vibration sensor, winding temperature sensor and environmental parameter sensor are sent to the Internet of Things terminal via shielded wires. The integrated installation of multiple parameters is realized, and if more parameters need to be measured, similar ideas can also be used for design.

[0027] Compared with the prior art, the present invention has the following advantages:

[0028] 1) According to the internal structural characteristics of the motor junction box, the voltage transformer, current transformer and temperature probe are designed into integrated sensors using the motor terminals, and other parameter sensors and IoT terminals are reasonably configured and pre-installed in the motor junction box, solving the special structural design and reasonable assembly of multi-parameter sensors in the intelligent motor system. The integration, miniaturization, modularization, compatibility, convenience, flexibility, reliability, and safety of sensors and other equipment required for the intelligent motor system are realized. An IoT sensor platform for motor operation big data is established, and the entire device has a simple structure, low cost, and small size, and can be widely used in various types of small and medium-sized motors.

[0029] 2) Integrate the smart motor IoT sensor inside the motor junction box, only make adaptive improvements to the motor terminal block, do not change the motor structure, and do not cause any other impact on the motor. It can realize the integrated installation of most motor operating parameter sensors, providing a new idea for the realization of smart motor systems. At the same time, it is also convenient to upgrade and install the motors in operation, effectively reducing the cost of upgrading and transformation, which is very conducive to the promotion of motor intelligence.

[0030] 3) The integrated sensor combined with the structural design of the motor terminal can stably and reliably obtain current, voltage and temperature signals. It has a compact structure, high integration, and is very convenient to install and disassemble. The temperature probe on the integrated sensor can also monitor the temperature changes of the motor terminal in real time, and issue an early warning or alarm in case of abnormalities, effectively preventing thermal failures of the terminal due to loose bolts or poor contact.

[0031] 4) The upper and lower rings and a hollow semi-cylindrical structure design of the conductive sheet provide mechanical support for reliable and stable installation and good contact. It not only ensures that the integrated sensor will not be damaged when fixed and compressed, but also further improves the reliability of power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 : Schematic diagram of the IoT sensor structure.

[0033] In the figure: 1-integrated sensor, 2-current transformer, 3-voltage transformer, 4-conductive sheet, 5-temperature probe, 6-current limiting resistor slot, 7-current limiting resistor, 8-temperature probe slot, 9-current output terminal, 10-voltage output terminal, 11-temperature sensor output terminal, 12-conductive sheet lead-out terminal, 13-neutral line input terminal, 14-power supply line, 15-first input terminal of voltage transformer, 16-second input terminal of voltage transformer, 17-motor terminal, 18-connecting sheet, 19-motor junction box, 20-Internet of Things terminal, 21-motor junction box cover, 22-antenna, 23-power module, 24-display module, 25-current direction mark, 26-shielded shell, 27-motor winding line, 28-nut, 29-speed sensor, 30-vibration sensor, 31-winding temperature sensor, 32-environmental parameter sensor. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings:

[0035] like Figure 1 Shown is a schematic diagram of the IoT sensor structure. Figure 1 The intelligent motor junction box integrated multi-parameter Internet of Things sensor includes an integrated sensor 1, a current transformer 2, a voltage transformer 3, a conductive sheet 4, a temperature probe 5, a current limiting resistor slot 6, a current limiting resistor 7, a temperature probe slot 8, a current output terminal 9, a voltage output terminal 10, a temperature sensor output terminal 11, a conductive sheet lead-out terminal 12, a neutral line input terminal 13, a power supply line 14, a first voltage transformer input terminal 15, a second voltage transformer input terminal 16, a motor terminal 17, a connecting sheet 18, a motor junction box 19, an Internet of Things terminal 20, a motor junction box cover 21, an antenna 22, a power module 23, a display module 24, a current direction mark 25, a shielding shell 26, a motor winding input line 27, a nut 28, a speed sensor 29, a vibration sensor 30, a winding temperature sensor 31, and an environmental parameter sensor 32.

[0036] Figure 1 In the figure, the integrated sensor 1 is formed by casting a current transformer 2, a voltage transformer 3 and a conductive sheet 4 with insulating material. The current transformer 2 is an oblate structure with an inner diameter slightly larger than the diameter of the motor terminal 17. The conductive sheet 4 is an exposed hollow annular metal sheet cast on the upper part of the current transformer 2.

[0037] When the integrated sensor 1 is installed on the motor terminal 17, the power supply line 14, the integrated sensor 1, the connecting piece 18, and the motor winding line 27 are installed from top to bottom. First, the motor winding line 27 is installed on the motor terminal 17, and it is fixed with a nut 28, and then the connecting piece 18 and the integrated sensor 1 are put on the motor terminal 17 in sequence. When installing, pay attention to the current direction mark 25 on the outer surface of the integrated sensor 1. Finally, the power supply line 14 is stacked on the conductive sheet 4, and the temperature probe 5 is installed in the temperature probe slot 8 at the bottom of the voltage transformer 3. After being pressed with the nut 28, the conductive sheet 4 is reliably and closely contacted with the power supply line 14, and the temperature probe 5 is closely contacted with the connecting piece 18. Obviously, this structure and assembly method of the design can conveniently and reliably obtain accurate current, voltage and temperature signals, thereby realizing the high integration and reliability of the integrated sensor 1. The outer surface of the integrated sensor 1 has a current direction mark 25. Avoid connecting in the wrong direction during installation, resulting in the inability to obtain the correct current signal and temperature signal.

[0038] Figure 1 It is a side view showing a single-phase installation method. Three integrated sensors 1 can be installed in the same way on three motor terminals 17 of three phases inside the motor terminal box 19, so as to monitor the three phases simultaneously.

[0039] Figure 1 In the embodiment, the voltage transformer 3 is located on the right side of the current transformer 2, and the current limiting resistor slot 6 is set on the upper surface of the integrated sensor 1 between the two. The current limiting resistor 7 can be installed in the current limiting resistor slot 6 by means of snaps, wire terminals, etc., and the reliable connection of the interface needs to be ensured, and it is also convenient to remove and replace, so as to adjust the resistance value of the current limiting resistor according to the voltage level and the requirements of the measuring device. A transparent protective cover or a rubber plug can be set on the upper part of the current limiting resistor slot 6 to achieve waterproof and dustproof effects.

[0040] The voltage transformer first input terminal 15 of the voltage transformer 3 is connected to the conductive sheet 4 via the current limiting resistor 7, and the voltage transformer second input terminal 16 is connected to the neutral line input terminal 13; the strong voltage signal is converted into a weak current signal through the current limiting resistor 7 to provide a voltage signal for the voltage transformer 3. The wires connected to the current limiting resistor 7 are shielded wires, which are all encapsulated in the integrated sensor 1 with insulating materials, simplifying the external structure, avoiding secondary wiring during installation, and causing interference, while ensuring the stability and reliability of long-term operation.

[0041] Figure 1In the embodiment, the current output terminal 9 and the voltage output terminal 10 are fixed on the integrated sensor 1 with double terminals and are led out through shielded twisted pair cables, and the temperature sensor output terminal 11 is also led out through shielded twisted pair cables. The conductive sheet lead-out terminal 12 is fixed on the conductive sheet 4 with a single terminal, and the voltage transformer first input terminal 15 and the voltage transformer second input terminal 16 are fixed on the integrated sensor 1 with a single terminal and are led out through shielded wires.

[0042] Figure 1 In the embodiment, the Internet of Things terminal 20 is fixed on the inner surface of the motor junction box cover 21 and installed in the shielding shell 26, and the antenna 22 is led out from the motor junction box cover 21 to the outside. The power module 23 is fixed on the inner surface of the motor junction box cover 21, obtains AC power through the conductive sheet lead-out terminal 12 and the neutral line input terminal 13, converts it into standard DC, and then supplies power to the Internet of Things terminal 20. The display module 24 is fixed on the outer surface of the motor junction box cover 21 to provide data display for the Internet of Things terminal 20.

[0043] The IoT terminal 20 obtains current, voltage and temperature signals from the current output terminal 9, voltage output terminal 10 and temperature sensor output terminal 11 of the integrated sensor 1, respectively, and exchanges data with external devices through the antenna 22 after calculation, analysis and processing, thereby forming an integrated IoT sensor of the intelligent motor system.

[0044] Figure 1 The output signals of the speed sensor 29, the vibration sensor 30, the winding temperature sensor 31 and the environmental parameter sensor 32 may be analog or digital, and the signals are introduced into the IoT terminal 20 by shielded wire. The vibration sensor 30 is fixed on the side wall of the motor junction box 19 to measure the vibration data of the motor; the environmental parameter sensor 32 is installed on the outer surface of the motor junction box cover 21 to measure the ambient temperature, humidity, dust concentration and air pressure of the motor. These two sensors can be directly integrated with the motor junction box 19. Figure 1 The installation location of the sensor is specifically marked.

[0045] The speed sensor 29 is installed on the main shaft inside the motor to measure the real-time speed of the motor. The winding temperature sensor 31 is installed in the winding of the motor to measure the winding temperature of the motor. These two sensors cannot be integrated inside the motor terminal box 19, but the signal line can be conveniently connected to the Internet of Things terminal 20 through the through hole at the bottom of the motor terminal block. Figure 1 Only the connection relationship is marked, and the specific installation location of the sensor is not marked. The above design ideas can also be used for the installation and data integration acquisition of other sensors.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Intelligent motor junction box integrated multi-parameter IoT sensor, characterized by: It comprises an integrated sensor (1), a current transformer (2), a voltage transformer (3), a conductive sheet (4), a temperature probe (5), a current limiting resistor slot (6), a current limiting resistor (7), a temperature probe slot (8), a current output end (9), a voltage output end (10), a temperature sensor output end (11), a conductive sheet lead end (12), a neutral line input end (13), a power supply line (14), a first voltage transformer input end (15), a second voltage transformer input end (16), a motor terminal (17), a connecting sheet (18), a motor junction box (19), an Internet of Things terminal (20), a motor junction box cover (21), and an antenna (22); The integrated sensor (1) is formed by casting a current transformer (2), a voltage transformer (3) and a conductive sheet (4) with insulating material, wherein the conductive sheet (4) is located on the upper part of the current transformer (2); The voltage transformer (3) is located on the side of the current transformer (2), and there is a current limiting resistor slot (6) between the two, which is located on the upper surface of the integrated sensor (1), and the current limiting resistor (7) is installed in the current limiting resistor slot (6); A temperature probe groove (8) is provided at the lower part of the voltage transformer (3) and is located on the lower surface of the integrated sensor (1), and the temperature probe (5) is installed in the temperature probe groove (8); The integrated sensor (1) is provided with a current output terminal (9) and a voltage output terminal (10), which respectively lead out the signals of the current transformer (2) and the voltage transformer (3) by using double terminals or shielded twisted pair cables, and the temperature sensor output terminal (11) leads out the signal of the temperature probe (5) by using shielded twisted pair cables; The integrated sensor (1) is provided with a conductive sheet lead-out terminal (12) for leading out the voltage of the conductive sheet (4) by using a single terminal or a shielded soft wire; and a neutral line input terminal (13) for introducing the neutral line of the power supply line (14) by using a single terminal or a shielded soft wire; A voltage transformer first input terminal (15) of the voltage transformer (3) is connected to the conductive sheet (4) via a current limiting resistor (7), and a voltage transformer second input terminal (16) is connected to a neutral line input terminal (13); The integrated sensor (1) is mounted on the motor terminal (17) by using the through hole in the middle of the current transformer (2) and the conductive sheet (4), and the temperature probe (5) installed on the lower surface is in close contact with the connecting sheet (18); three integrated sensors (1) are respectively installed on three motor terminal posts (17) of three phases inside the motor terminal box (19); The Internet of Things terminal (20) is fixed on the inner surface of the motor junction box cover (21), and the antenna (22) is led out from the motor junction box cover (21) to the outside; the Internet of Things terminal (20) obtains power from the conductive sheet lead-out terminal (12) and the neutral line of the power supply line (14), and obtains three-phase current, voltage and temperature signals from the current output terminal (9), voltage output terminal (10) and temperature sensor output terminal (11) of the three integrated sensors (1), respectively, and after calculation, analysis and processing, uses the antenna (22) to exchange data with external equipment; The current transformer (2) is an oblate structure, the inner diameter of which is slightly larger than the diameter of the motor terminal (17), and the conductive sheet (4) is an exposed hollow annular metal sheet; The wire connected to the current limiting resistor (7) is a shielded wire; The first input end (15) of the voltage transformer and the second input end (16) of the voltage transformer are fixed on the integrated sensor (1) by means of single terminals and are led out via shielded wires.

2. The intelligent motor junction box integrated multi-parameter Internet of Things sensor according to claim 1 is characterized in that: It comprises a power module (23) fixed on the inner surface of the motor junction box cover (21), which obtains AC power through the conductive sheet lead-out terminal (12) and the neutral line input terminal (13), converts it into standard DC, and then supplies power to the Internet of Things terminal (20).

3. The intelligent motor junction box integrated multi-parameter Internet of Things sensor according to claim 1 is characterized in that: It comprises a display module (24) fixed on the outer surface of the motor junction box cover (21) and providing data display for the Internet of Things terminal (20).

4. The intelligent motor junction box integrated multi-parameter Internet of Things sensor according to claim 1 is characterized in that: The integrated sensor (1) has a current direction mark (25) on its outer surface.

5. The intelligent motor junction box integrated multi-parameter Internet of Things sensor according to claim 1 is characterized in that: The Internet of Things terminal (20) is installed in a shielding shell (26).

6. The intelligent motor junction box integrated multi-parameter Internet of Things sensor according to claim 1 is characterized in that: When the integrated sensor (1) is installed on the motor terminal (17), the power supply line (14), the integrated sensor (1), the connecting piece (18), and the motor winding line (27) are installed in sequence from top to bottom, and the nuts (28) are used to fix and tighten them in the middle.

7. The intelligent motor junction box integrated multi-parameter Internet of Things sensor according to claim 1 is characterized in that: All the wires of the integrated sensor (1) that are not connected to the outside are encapsulated inside by insulating material.

8. The intelligent motor junction box integrated multi-parameter Internet of Things sensor according to claim 1, characterized in that: The conductive sheet (4) is a structure in which two upper and lower circular rings and a hollow semi-cylinder are integrated into one body, and is mounted on the position of the current transformer (2) of the integrated sensor (1), and the through hole between the upper and lower circular rings overlaps with the through hole of the current transformer (2).

9. The intelligent motor junction box integrated multi-parameter Internet of Things sensor according to claim 1, characterized in that: The invention comprises a rotation speed sensor (29), a vibration sensor (30), a winding temperature sensor (31), and an environmental parameter sensor (32); the rotation speed sensor (29) is installed on the main shaft inside the motor to measure the real-time rotation speed of the motor; the vibration sensor (30) is installed and fixed on the side wall of the motor junction box cover (21) to measure the vibration data of the motor; the winding temperature sensor (31) is installed in the winding of the motor to measure the winding temperature of the motor; the environmental parameter sensor (32) is installed on the outer surface of the motor junction box cover (21) to measure the ambient temperature, humidity, dust concentration and air pressure of the working environment of the motor; the signals measured by the rotation speed sensor (29), the vibration sensor (30), the winding temperature sensor (31) and the environmental parameter sensor (32) are sent to the Internet of Things terminal (20) via a shielded line.

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