A temperature and vibration sensor

Abstract

The utility model relates to a kind of temperature vibration sensors, the temperature vibration sensor is installed on low-voltage motor;The temperature vibration sensor includes: temperature vibration sensor main body and the cable line of connecting the temperature vibration sensor main body;The cable line is connected in the arbitrary two terminal posts of the main terminal box of the low-voltage motor.The cable line of the temperature vibration sensor main body of the utility model is directly connected to the arbitrary two terminal posts in the main terminal box of low-voltage motor, can be on-site conveniently power on, and also avoids the trouble of battery replacement.

Description

Technical Field

[0001] This utility model belongs to the field of temperature and vibration sensor technology, and relates to a temperature and vibration sensor. Background Technology

[0002] Existing technologies utilize temperature and vibration sensors to monitor the vibration speed and related factors of mechanical equipment. They can also measure the temperature of mechanical equipment in real time. These sensors are widely used in electromechanical equipment such as motors, fans, bearings, reducers, generators, gas engines, and centrifuges to monitor the operating temperature and vibration status of electromechanical equipment in real time.

[0003] Traditional temperature and vibration sensors are generally battery-powered. With the development of IoT technology, temperature and vibration sensors can transmit the collected signals to the equipment health diagnosis platform via 4G for early warning of equipment operation. However, 4G transmission consumes a lot of power, and due to the size limitations of temperature and vibration sensors, the battery capacity cannot be increased indefinitely. This leads to frequent battery replacements for battery-powered temperature and vibration sensors, which is not conducive to on-site management. Furthermore, when temperature and vibration sensors are used in low-voltage explosion-proof motor applications, the battery mounting location is often sealed with glue due to explosion-proof requirements. This makes it difficult to replace the sensor when the battery is dead, and disassembly is quite troublesome. If separate wiring is provided for the sensor, the installation is complex and costly, and additional electrical wiring in explosion-proof areas poses certain safety risks and construction difficulties. Utility Model Content

[0004] The purpose of this invention is to provide a temperature and vibration sensor that can be powered directly by any two terminals in the main junction box of a low-voltage motor, which can be conveniently connected to the power supply on site and avoid the trouble of changing batteries.

[0005] This application provides a temperature vibration sensor, which is installed on a low-voltage motor; the temperature vibration sensor includes: a temperature vibration sensor body and a cable connected to the temperature vibration sensor body; the cable is connected to any two terminals in the main junction box of the low-voltage motor.

[0006] A preferred solution is that the temperature and vibration sensor is fixed to the surface of the low-voltage motor housing with bolts, or is attracted to the surface of the housing with a magnet, or is mounted on the heat sink of the low-voltage motor with a bracket.

[0007] A preferred embodiment is that the temperature and vibration sensor body includes a base plate and a housing, with the housing fixed to the base plate to form an internal installation space.

[0008] A preferred embodiment is that a circuit board is provided within the installation space, and a microprocessor, a vibration sensor, and a temperature sensor are provided on the circuit board; both the vibration sensor and the temperature sensor are electrically connected to the microprocessor; the vibration sensor is used to collect vibration data of the low-voltage motor when the vibration sensor is working normally; the temperature sensor collects the conductive temperature of the surface of the low-voltage motor when the vibration sensor is working normally.

[0009] A preferred embodiment is that the circuit board is further provided with a wireless communication module, which is electrically connected to the microprocessor; the microprocessor communicates with the remote processing platform through the wireless communication module.

[0010] A preferred embodiment is that the circuit board is further provided with a power module, which is electrically connected to the microprocessor, the vibration sensor, the temperature sensor and the wireless communication module; the power module is also electrically connected to the cable.

[0011] A preferred embodiment is that the housing is provided with a display screen; the display screen is electrically connected to the microprocessor.

[0012] A preferred embodiment is that the temperature sensor measures a temperature range of -40°C to 125°C.

[0013] A preferred embodiment is that the vibration sensor measures vibration velocities in the range of 0-99 mm / s.

[0014] Beneficial effects This application provides a temperature vibration sensor, which includes a sensor body and a cable extending from the sensor body. When the sensor body is installed on a low-voltage motor, the cable is directly connected to any two terminals in the main junction box of the low-voltage motor for power supply. Compared with the traditional battery-powered method, this temperature vibration sensor is convenient to connect to power on site and avoids the predicament of batteries being unable to be replaced after being encapsulated in explosion-proof motors, which would lead to the batteries running out of power and becoming unusable. It also avoids the trouble of frequently replacing batteries when using wireless temperature vibration sensors in ordinary motors. By using the low-voltage motor's own power supply to power the temperature vibration sensor, no additional power lines are required, which greatly simplifies the installation process, reduces costs and construction complexity, and is particularly suitable for use in explosion-proof areas. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the temperature and vibration sensor installed on the low-voltage motor according to this embodiment; Figure 2 This is an internal diagram of the temperature and vibration sensor provided in this embodiment; Figure 3This is a top view of the temperature and vibration sensor provided in this embodiment; Figure 4 This is a schematic diagram showing the detailed circuit connections of the temperature and vibration sensor provided in this embodiment.

[0016] Figure Labels 10. Temperature and vibration sensor; 11. Temperature and vibration sensor body; 111. Base plate; 112. Housing; 113. Circuit board; 114. Microprocessor; 115. Vibration sensor; 116. Temperature sensor; 117. Wireless communication module; 118. Power supply module; 119. Display screen; 12. Cable; 20. Low-voltage motor; 21. Main junction box; 22. Terminal block; 23. Outgoing cable gland. Detailed Implementation

[0017] The technical solution of this utility model is further illustrated below through specific embodiments. These specific embodiments do not represent a limitation on the scope of protection of this utility model. Any non-essential modifications and adjustments made by others based on the concept of this utility model still fall within the scope of protection of this utility model.

[0018] This application provides a temperature vibration sensor; please refer to... Figure 1 and Figure 2 As shown, the temperature and vibration sensor 10 is mounted on the low-voltage motor 20 (e.g., Figure 1 (position a in the text). The temperature vibration sensor 10 includes a temperature vibration sensor body 11 and a cable 12 connected to the temperature vibration sensor body 11. The cable 12 is connected to any two terminals 22 within the main junction box 21 of the low-voltage motor 20. Preferably, a cable outlet 23 is installed at the bottom of the main junction box 21, and the cable 12 passes through this cable outlet 23 to connect to any two terminals 22 within the main junction box 21.

[0019] In this embodiment, the power supply for the temperature and vibration sensor 10 can be drawn from any two terminals 22 within the main junction box 21 of the low-voltage motor 20. That is, the cable 12 of the temperature and vibration sensor body 11 is directly connected to any two terminals 22 within the main junction box 21 of the low-voltage motor 20. In this way, compared to the traditional battery-powered method, the temperature and vibration sensor 10 in this embodiment is conveniently connected to power on-site and avoids the hassle of battery replacement. The temperature and vibration sensor 10 can directly obtain operating power from the power supply line of the low-voltage motor 20, eliminating the need for a separate power supply. It should be noted that the temperature and vibration sensor 10 is designed according to the requirements of explosion-proof environments.

[0020] In this embodiment, it should be noted that the temperature and vibration sensor 10 can be installed in various ways. For example, it can be fixed to the surface of the low-voltage motor 20 housing with bolts, attracted to the surface of the housing with magnets, or mounted on the heat sink of the low-voltage motor 20 with a bracket. This allows it to adapt to low-voltage motors with different structures and usage scenarios, demonstrating strong versatility. Specifically, the temperature and vibration sensor 10 can be directly fixed to the surface of the low-voltage motor 20 housing with bolts. For motor housings with flat surfaces, magnetic attraction can also be used for fixing, making installation and disassembly more convenient. For motors with heat sinks, a specially designed bracket can be used to mount the temperature and vibration sensor 10 on the heat sink. This embodiment does not impose specific limitations on the installation method and can be selected according to the actual environment.

[0021] In this embodiment, it should also be noted that, please continue to refer to... Figure 1 and Figure 2 As shown, the temperature and vibration sensor body 11 includes a base plate 111 and a housing 112. The housing 112 is fixed to the base plate 111 to form an internal installation space. The housing 112 and the base plate 111 can be connected by bolts or by laser welding to ensure that the sensor's protection capability meets the IP68 environmental requirements. In this embodiment, the temperature and vibration sensor body 11 includes a base plate 111 and a housing 112, which facilitates the installation of various sensor components. After installation, epoxy resin can be potted inside the housing 112. After the epoxy resin cures, it can improve the vibration resistance of various components and enhance the overall rigidity of the sensor, thereby meeting the requirements for detecting broadband vibration signal acceleration. A cable 12 is connected to the housing 112 via a cable connector, and this cable 12 serves as the power source for the sensor.

[0022] Please refer to Figure 2 and Figure 4 As shown, in one possible implementation, the temperature and vibration sensor body 11 also includes a circuit board 113, which is disposed in the installation space. The circuit board 113 is equipped with a microprocessor 114, a vibration sensor 115, and a temperature sensor 116. Both the vibration sensor 115 and the temperature sensor 116 are electrically connected to the microprocessor 114. The vibration sensor 115 is used to collect vibration data of the low-voltage motor 20 when the temperature and vibration sensor 10 is working normally, providing a basis for calculating the vibration characteristic value of the equipment and for fault diagnosis. The temperature sensor 116 collects the radiation temperature of the surface of the low-voltage motor 20 when the temperature and vibration sensor 10 is working normally.

[0023] It should be noted that the vibration sensor 115 can be a 3-axis accelerometer. As the core module for vibration data acquisition, the 3-axis accelerometer continuously acquires vibration acceleration signals in the X, Y, and Z directions when the vibration sensor 10 is operating normally. These signals contain rich characteristic information about the equipment's operation, providing raw data for subsequent calculations of vibration characteristic values ​​(such as peak value, RMS value, kurtosis, etc.), thus laying the foundation for equipment fault diagnosis (such as bearing wear, rotor imbalance, etc.). Its acquisition accuracy and response speed directly affect the accuracy of vibration monitoring; therefore, it needs to be compatible with an industrial-grade high-resolution chip to ensure stable data acquisition in both high-speed operation and low-frequency vibration scenarios. Preferably, the vibration velocity range measured by the vibration sensor 115 is 0-99 mm / s.

[0024] The temperature sensor 116 can employ a non-contact measurement method, such as an infrared temperature sensor. The base plate 111 is a metal base plate, which has good heat transfer properties. The heat dissipated from the housing of the low-voltage motor 20 is transferred to the internal temperature sensor 116 through the metal base plate 111. When the temperature sensor 116 is operating normally, it receives the temperature conducted to the surface of the equipment, thereby monitoring the surface temperature of the equipment in real time. This temperature data can help determine whether the equipment is in an abnormal heating state, such as the increased winding temperature when the motor is overloaded, or frictional heating when the bearing fails. Combining this with vibration data can improve the comprehensiveness of equipment condition assessment. Its measurement range needs to cover the common operating temperature range of industrial equipment (e.g., -40℃ to 125℃) and have the ability to resist ambient light interference. Preferably, the temperature range measured by the temperature sensor 116 is -40℃ to 125℃.

[0025] The microprocessor 114, acting as the "brain" of the sensor, is responsible for coordinating the work of all modules. Specifically, this includes: receiving and processing data from the 3-axis accelerometer and infrared temperature sensor, performing feature value calculations and determining the device's start / stop status; parsing instructions received by the wireless communication module 117, and executing data upload or upgrade operations; and managing the sensor's operating mode and standby mode switching. It requires a low-power, high-performance industrial-grade chip with sufficient computing power to quickly complete feature value calculations, while also supporting FLASH partitioned storage to meet the needs of program upgrades.

[0026] Please refer to Figure 2 and Figure 4 As shown, in another possible implementation, a wireless communication module 117 is also provided on the circuit board 113. The wireless communication module 117 is electrically connected to the microprocessor 114, and the microprocessor 114 communicates data with a remote processing platform (such as a cloud server or a local monitoring center) through the wireless communication module 117.

[0027] It should be noted that the wireless communication module 117 is used for data transmission. The wireless communication module 117 can be a 4G communication module, which undertakes the dual responsibilities of data transmission and firmware temporary storage. On the one hand, it achieves data interaction with the remote processing platform through the 4G wireless network, including uploading collected vibration and temperature data and receiving control commands (such as parameter adjustment and upgrade commands) issued by the processing platform. On the other hand, during remote upgrades, due to the limited memory of the microprocessor 114, this module can temporarily store the upgrade firmware downloaded from the server and then interact with the microprocessor 114 through segmented transmission. It needs to support industrial-grade communication protocols (such as MQTT and HTTP) to ensure stable communication in complex industrial environments, and also have sufficient storage capacity (at least enough to meet the storage requirements of a single firmware upgrade).

[0028] Please refer to Figure 2 and Figure 4 As shown, in another possible implementation, a power module 118 is also provided on the circuit board 113. The power module 118 is electrically connected to the microprocessor 114, and the power module 118 is also electrically connected to the cable 12 (e.g., Figure 1 (As shown). Preferably, the power module 118 uses an isolated power supply to reduce electromagnetic interference.

[0029] It should be noted that by setting up the power module 118, the power module 118 draws power from the terminal 22 of the low-voltage motor 20 through the cable 12, and provides a stable and appropriate operating voltage for each module on the entire circuit board 113, such as powering the microprocessor 114, vibration sensor 115, temperature sensor 116 and wireless communication module 117.

[0030] In addition, the temperature and vibration sensor 10 in this application is mainly used in the low-voltage motor 20. The operating voltage of the low-voltage motor 20 is below 90-420VAC. When the temperature and vibration sensor 10 draws power from any two terminals 22 in the main junction box 21 of the low-voltage motor 20, the power supply module 18 converts the voltage. The power supply module 18 has a built-in conventional AC-DC conversion circuit and DC-DC conversion circuit. The AC-DC conversion circuit can convert AC power into DC power, and the DC power is then converted by the DC-DC conversion circuit to convert the DC power into a current or voltage that the temperature and vibration sensor 10 can use, such as the operating voltage of 12V or 24V. The principle and application of the above-mentioned AC-DC conversion circuit and DC-DC conversion circuit are relatively mature technologies in this field, and will not be described in detail here.

[0031] Please refer to Figures 2-4 As shown, in another possible implementation, a display screen 119 is provided on the housing 112, and the display screen 119 is electrically connected to the microprocessor 114.

[0032] It should be noted that the display screen 119 can display the vibration speed and surface temperature of the low-voltage motor 20 when it is working, that is, the measured data is directly displayed on the display screen 119, so that the data can be viewed intuitively.

[0033] The implementation principle of this embodiment is as follows: The temperature and vibration sensor 10 is securely mounted to the housing or heat sink of the low-voltage motor 20 using a selected method (bolts, magnets, or brackets). The cable 12 is introduced into the main junction box 21 of the low-voltage motor 20 and reliably connected to any two terminals 22. After power-on, the power module 118 starts working, supplying power to the entire temperature and vibration sensor 10. The vibration sensor 115 continuously monitors the vibration of the low-voltage motor 20, and the temperature sensor 116 monitors the surface temperature of the low-voltage motor 20. The collected data is initially processed and packaged by the microprocessor 114, and then transmitted to the remote processing platform via the wireless communication module 117. The processing platform analyzes the data, and if it detects that the vibration or temperature data exceeds a preset threshold, it issues an early warning, prompting maintenance personnel to conduct timely inspection and maintenance, thereby preventing equipment failure and ensuring safe production. The power supply method of the aforementioned temperature and vibration sensor 10 has been changed from battery power to power drawn from any two terminals 22 in the main junction box 21 of the low-voltage motor 20. Compared with the traditional battery power method, the temperature and vibration sensor 10 in this embodiment can be conveniently connected to power on site and avoids the trouble of changing batteries. At the same time, the detection elements corresponding to the temperature and vibration signal parameters are integrated on the same circuit board 113, and the circuit board 113 is installed in the housing 112 to form a single sensor. This reduces the overall size of the sensor while satisfying the detection of multiple parameters, thus achieving miniaturization of the sensor design.

[0034] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A temperature vibration sensor, characterized in that, The temperature and vibration sensor (10) is mounted on the low-voltage motor (20); The temperature vibration sensor (10) includes: a temperature vibration sensor body (11) and a cable (12) connected to the temperature vibration sensor body (11); The cable (12) is connected to any two terminals (22) in the main junction box (21) of the low-voltage motor (20).

2. The temperature vibration sensor as described in claim 1, characterized in that, The temperature and vibration sensor (10) is fixed to the housing surface of the low-voltage motor (20) by bolts, or is attracted to the housing surface by magnets, or is mounted on the heat sink of the low-voltage motor (20) by brackets.

3. The temperature vibration sensor as described in claim 1, characterized in that, The temperature and vibration sensor body (11) includes a base plate (111) and a housing (112), wherein the housing (112) is fixed on the base plate (111) to form an installation space inside.

4. The temperature vibration sensor as described in claim 3, characterized in that, A circuit board (113) is provided in the installation space, and a microprocessor (114), a vibration sensor (115), and a temperature sensor (116) are provided on the circuit board (113); The vibration sensor (115) and the temperature sensor (116) are both electrically connected to the microprocessor (114); The vibration sensor (115) is used to collect vibration data of the low-voltage motor (20) when the temperature and vibration sensor (10) is working normally; The temperature sensor (116) collects the conductive temperature on the surface of the low-voltage motor (20) when the temperature and vibration sensor (10) is working normally.

5. The temperature vibration sensor as described in claim 4, characterized in that, The circuit board (113) is also provided with a wireless communication module (117), which is electrically connected to the microprocessor (114); The microprocessor (114) communicates with the remote processing platform via the wireless communication module (117).

6. The temperature vibration sensor as described in claim 5, characterized in that, The circuit board (113) is also provided with a power module (118), which is electrically connected to the microprocessor (114); The power module (118) is also electrically connected to the cable (12).

7. The temperature vibration sensor as described in claim 5, characterized in that, A display screen (119) is provided on the outer casing (112); The display screen (119) is electrically connected to the microprocessor (114).

8. The temperature vibration sensor as described in claim 4, characterized in that, The temperature sensor (116) measures a temperature range of -40°C to 125°C.

9. The temperature vibration sensor as described in claim 4, characterized in that, The vibration sensor (115) measures vibration velocities ranging from 0 to 99 mm / s.

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