A detachable active wireless temperature measuring nut and its temperature monitoring system

Abstract

The present invention relates to a detachable active wireless temperature measuring nut, comprising a metal shell and a metal base, a temperature sensor, a main control circuit board and a battery arranged in the metal shell. One end of the metal shell opening is provided with an internal thread matching the bolt. The metal base is arranged in the metal shell and is adjacent to the internal thread. A through hole is provided on the metal base, and the temperature sensor is embedded in the through hole. The main control circuit board and the battery are fixed to the metal base via a bracket. The temperature sensor collects the temperature signal and sends it to the main control circuit board. After the main control circuit board converts the temperature signal into an electrical signal, the electrical signal is transmitted through the metal shell in a radio frequency communication manner. The present invention also relates to a temperature monitoring system, comprising an active wireless temperature measuring nut, a relay unit and a background management system. The present invention has a simple structure, is easy to maintain and disassemble, has strong anti-interference performance, high detection accuracy, and can perform real-time temperature monitoring and alarm on bolts on power lines and equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of power transmission and distribution line maintenance, and in particular to a detachable active wireless temperature measuring nut and a system thereof for fixing bolts on power lines and equipment. Background Art

[0002] Smart grid services are rapidly developing, and sensor monitoring technology has been widely applied in power maintenance. Online fault analysis, early warning, and timely troubleshooting of transmission and distribution lines are key goals of smart services, ensuring safe and reliable operation of power systems. Power equipment in power grids operates under high current and heavy load conditions, with equipment joints exposed to the air. Metal oxidation, as well as environmental factors such as dust and oil in the air, increase resistance and temperature at these joints, shortening service life. In severe cases, they can even cause burnout and lead to failure of the entire power system. Therefore, temperature monitoring of equipment and power line connections is essential. Existing methods for monitoring temperature in power grid equipment typically involve installing temperature acquisition devices on the equipment. This requires securing the device to the equipment using fixed brackets or other means, making the installation process time-consuming and labor-intensive. For already deployed power grids, adding new temperature monitoring points or maintaining faulty ones presents complex upgrade and maintenance challenges.

[0003] Most of the existing fasteners with temperature collection functions are equipped with temperature collection devices on bolts. Such bolts have many inconveniences in use. For example, to add or maintain old temperature measuring bolts, the old bolts must be removed first, that is, the original fixed connection method must be removed, and replaced with new bolts with temperature collection functions. The entire maintenance process requires disassembly and reinstallation, which is complicated. Moreover, the bolts are installed at the connection position of the power line, which will cause power outages in the power grid, greatly affecting the user's power experience. Summary of the Invention

[0004] In order to solve the above problems, the purpose of the present invention is to provide a detachable active wireless temperature measuring nut, which has a simple structure, is easy to maintain and disassemble, has high detection accuracy and strong anti-interference ability.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A detachable active wireless temperature measuring nut includes a metal shell serving as a radio frequency signal antenna and a metal base, a temperature sensor, a main control circuit board and a battery arranged in the metal shell. The metal shell is open at one end and closed at the other end. An internal thread matching a bolt is provided at the open end. The metal base is arranged in the metal shell and is adjacent to the internal thread. A through hole is provided on the metal base, and the temperature sensor is embedded in the through hole. The main control circuit board and the battery are fixed to the metal base through a bracket. The battery supplies power to the main control circuit board and the temperature sensor. The temperature sensor collects temperature signals and sends them to the main control circuit board. After the main circuit board converts the temperature signals into electrical signals, the electrical signals are transmitted through the metal shell in a radio frequency communication manner.

[0007] More preferably, a waterproof ring is provided on the outer periphery of the metal base, and the metal base is sealed with the inner wall of the metal shell through the waterproof ring.

[0008] More preferably, the active wireless temperature measuring nut further includes an acoustic and optical alarm module embedded in the closed end of the metal shell, and the acoustic and optical alarm module is electrically connected to the main control circuit board.

[0009] More preferably, an insulating sheet is provided between the metal base and the main control circuit board, and between the main control circuit board and the battery.

[0010] More preferably, the measurement range of the temperature sensor is -55°C to 180°C, and the measurement accuracy is ±0.5°C within the temperature range of -10°C to 85°C.

[0011] More preferably, the battery is a button battery.

[0012] The present invention also provides a temperature monitoring system to achieve real-time online monitoring of the temperature of bolts on lines and equipment. When the temperature is abnormal, an alarm is promptly issued to relevant staff, thereby ensuring the normal operation of the entire power system.

[0013] The technical solution is as follows:

[0014] A temperature monitoring system includes a detachable active wireless temperature measuring nut, a relay unit and a background management system. The active wireless temperature measuring nut is installed on the bolt at the monitoring point, collects the temperature of the bolt, and transmits the temperature signal to a nearby relay unit through a radio frequency circuit after processing. The relay unit collects the data and transmits it to the background management system through a communication network. The background management system performs operation trend analysis and alarm analysis on the collected data, and distributes alarm information of different levels according to preset distribution rules.

[0015] The present invention has the following beneficial effects:

[0016] 1. The present invention provides a detachable active wireless temperature measuring nut with simple structure, low cost and high temperature detection accuracy;

[0017] 2. The present invention is a detachable active wireless temperature measuring nut with a threaded design in the metal base. When installing, there is no need to remove the original bolt. The nut is screwed into the bolt and fits tightly with the stud on the bolt. It can be used directly. It is firm and reliable, has good temperature measurement effect, is simple to install, and is easy to use.

[0018] 3. The present invention provides a detachable active wireless temperature measuring nut. When it needs to be replaced, it can be replaced by simply unscrewing it, which is convenient and quick.

[0019] 4. In addition to the above advantages, the temperature monitoring system of the present invention can also perform real-time online monitoring of the temperature of lines and equipment during operation, playing a good monitoring and early warning role, thereby realizing the transformation from passive inspection to active maintenance and intelligent inspection, which is of great significance to the safe and reliable operation of lines and equipment, and ensures the normal operation of the distribution system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural schematic diagram of a detachable active wireless temperature measurement nut according to the present invention;

[0021] Figure 2 This is a partial cross-sectional view of a detachable active wireless temperature measurement nut;

[0022] Figure 3 This is a schematic diagram of a detachable active wireless temperature measurement nut in use;

[0023] Figure 4 This is a system block diagram of a temperature monitoring system of the present invention.

[0024] Description of reference numerals:

[0025] 1. Metal casing; 11. Internal thread; 2. Metal base; 3. Temperature sensor; 4. Main control circuit board; 5. Battery; 6. Sound and light alarm module; 7. Bolts. Implementation Method

[0026] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0027] See also Figures 1 to 3A detachable active wireless temperature measuring nut includes a metal shell 1 serving as a radio frequency signal antenna and a metal base 2, a temperature sensor 3, a main control circuit board 4 and a battery 5 arranged in the metal shell 1. The metal shell 1 has an opening at one end and a closed end. An internal thread 11 matching the bolt 7 is provided at the open end. The metal base 2 is arranged in the metal shell 1 and is adjacent to the internal thread 11. A through hole is provided on the metal base 2, and the temperature sensor 3 is embedded in the through hole. The main control circuit board 4 and the battery 5 are fixed to the metal base 2 through a bracket (not shown). The battery 5 supplies power to the main control circuit board 4 and the temperature sensor 3. The temperature sensor 3 collects temperature signals and sends them to the main control circuit board 4. After the main circuit board 4 converts the temperature signals into electrical signals, the electrical signals are transmitted through the metal shell 1 in a radio frequency communication manner. The active wireless temperature measuring nut also includes an acoustic and visual alarm module 6, which is embedded in the closed end of the metal shell 1. The acoustic and visual alarm module 6 is electrically connected to the main control circuit board 4 and can generate an acoustic and visual alarm when the temperature is abnormal.

[0028] Preferably, the outer perimeter of the metal base 2 is provided with a waterproof ring (not shown). This seal forms a waterproof connection with the inner wall of the metal housing 1, preventing liquids from corroding and damaging the components within. Insulating sheets (not shown) are provided between the metal base 2 and the main control circuit board 4, and between the main control circuit board 4 and the battery 5, to prevent electrical conduction between the components. Both the metal base 2 and the metal housing 1 can be made of aluminum alloy.

[0029] Preferably, temperature sensor 3 can be packaged in an embedded dual-in-line flat leadless SMD package, offering low power consumption, high precision, compact size, and high performance. Its measurement range is -55°C to 180°C, with an accuracy of ±0.5°C within the temperature range of -10°C to 85°C. For example, an AHT20 signal can be used. The temperature sensor is placed in close contact with the stud of bolt 7 to sense the temperature of bolt 7, providing more accurate temperature acquisition.

[0030] The battery 5 is a button battery that can be fixed on the bracket in a snap-on design and is easy to replace. Once replaced, it can be used for more than 5 years.

[0031] In order to achieve a more ideal temperature measurement effect, thermal conductive silicone can be applied to the temperature measuring nut before installation.

[0032] The working principle of the detachable active wireless temperature measuring nut of the present invention is as follows: the temperature measuring nut is screwed into the bolt 7, and the temperature sensor is in close contact with the bolt 7 to perform real-time temperature detection on the bolt 7. The bolt 7 is installed at a point on the power line or power equipment where temperature monitoring is required. The main control circuit board in the temperature measuring nut converts the temperature signal into a digital signal, and sends the temperature digital signal to a nearby relay unit in the form of radio frequency communication. The relay unit realizes long-distance transmission of the temperature digital signal. The relay unit can collect temperature data of several temperature measuring nuts, and then transmit it to the background management system over a long distance. When the temperature of the bolt 7 exceeds the preset safety temperature value, the main control circuit board can also control the sound and light alarm module to issue an on-site alarm.

[0033] The present invention provides a removable active wireless temperature-measuring nut with a simple structure, dust and water resistance, and excellent anti-interference and anti-oxidation properties. During installation and removal, the nut can be screwed into the original bolt 7 without removing it, providing convenient and quick access without affecting the normal operation of the power grid. Furthermore, by collecting the temperature of the bolt 7, the temperature at the point where the bolt 7 is located is monitored in real time and the data is transmitted externally, safeguarding the normal operation of the power grid. Example

[0034] See also Figures 1 to 4 The present invention also provides a temperature monitoring system, including the temperature measuring nut, relay unit and background management system described in Example 1. The active wireless temperature measuring nut serves as a data acquisition terminal of the temperature measuring nut system and is installed on the bolt 7 of the monitoring point, such as the bolt 7 of the power line or power equipment. The temperature of the bolt 7 is collected and the temperature signal is processed and transmitted to the nearby relay unit through the radio frequency circuit. After the relay unit collects the data, it is transmitted to the background management system through the communication network. The background management system performs operation trend analysis and alarm analysis on the collected data, and distributes alarm information of different levels according to preset distribution rules.

[0035] This embodiment uses temperature measuring nuts to collect the temperature of bolts 7 on power lines and power equipment in real time, and then sends the collected data to a nearby relay unit in a radio frequency communication manner. The relay unit transmits the collected data over long distances through the communication network. After the background management system obtains the data, it performs trend analysis through the data analysis module and determines whether an alarm is triggered through the alarm module. If so, different levels of alarm information are distributed according to the distribution rules and distributed to the clients of relevant maintenance personnel, thereby realizing the transformation from passive inspection to active maintenance and intelligent inspection, and ensuring the normal operation of the distribution system.

[0036] The above description is only a specific embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A detachable active wireless temperature measuring nut, characterized by: The invention comprises a metal shell serving as a radio frequency signal antenna and a metal base, a temperature sensor, a main control circuit board and a battery arranged in the metal shell. The battery is a button battery. The metal shell has an open end and a closed end. An internal thread matching a bolt is provided at the open end. The metal base is arranged in the metal shell and is adjacent to the internal thread. A through hole is provided on the metal base. The temperature sensor is embedded in the through hole. The temperature sensor is close to the bolt stud to sense the temperature of the bolt. The main control circuit board and the battery are fixed to the metal base through a bracket. The battery supplies power to the main control circuit board and the temperature sensor. The temperature sensor collects temperature signals and sends them to the main control circuit board. After the main circuit board converts the temperature signals into electrical signals, the main circuit board is electrically connected to the metal shell and transmits the electrical signals through the metal shell in a radio frequency communication manner.

2. The detachable active wireless temperature measuring nut according to claim 1, characterized in that: A waterproof ring is provided on the outer periphery of the metal base, and the metal base is sealed with the inner wall of the metal shell through the waterproof ring.

3. The detachable active wireless temperature measuring nut according to claim 1, characterized in that: It also includes an acousto-optic alarm module, which is embedded in the closed end of the metal shell, and the acousto-optic alarm module is electrically connected to the main control circuit board.

4. The detachable active wireless temperature measuring nut according to claim 1, characterized in that: Insulation sheets are provided between the metal base and the main control circuit board, and between the main control circuit board and the battery.

5. The detachable active wireless temperature measuring nut according to claim 1, characterized in that: The measuring range of the temperature sensor is -55℃~180℃, and the measuring accuracy is ±0.5℃ within the temperature range of -10℃~85℃.

6. A temperature monitoring system, characterized in that: It comprises a detachable active wireless temperature measuring nut, a relay unit and a background management system as described in any one of claims 1 to 5, wherein the active wireless temperature measuring nut is installed on the bolt at the monitoring point, collects the temperature of the bolt, and transmits the temperature signal to a nearby relay unit through a radio frequency circuit after processing. The relay unit collects the data and transmits it to the background management system through a communication network. The background management system performs operation trend analysis and alarm analysis on the collected data, and distributes alarm information of different levels according to preset distribution rules.

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