Cable multipoint temperature measurement device

Abstract

The present disclosure relates to a cable multi-point temperature measuring device, comprising a clamp and a plurality of temperature measuring boxes, the plurality of temperature measuring boxes are arranged on the clamp in a ring direction, the temperature measuring box comprises a control module, a wireless communication module, a thermistor temperature measuring module and a power supply module, the thermistor temperature measuring module and the wireless communication module are electrically connected with the control module, and the power supply module supplies power to the control module, the wireless communication module and the thermistor temperature measuring module; the thermistor temperature measuring module is used for detecting the temperature of the surface of the cable to be measured and transmitting the temperature data to the control module; the wireless communication module encodes and modulates the temperature data processed by the control module and transmits to a mobile terminal. Through the above technical scheme, the cable multi-point temperature measuring device can measure multiple points at the same time, more comprehensively cover the measurement part of the cable, and is beneficial to improve the accuracy of the cable surface temperature measurement and ensure the safe and stable operation of the power cable.

Description

Technical Field

[0001] This disclosure relates to the field of cable temperature measurement technology, specifically to a multi-point temperature measurement device for cables. Background Technology

[0002] In power systems, power cables serve as crucial carriers of electrical energy, and their safe and stable operation is paramount. During prolonged operation, cables are prone to localized overheating due to factors such as heat generated by current flow, ambient temperature variations, and poor contact at weak points like cable joints. Excessive cable temperature can lead to insulation aging, performance degradation, and even serious accidents like fires. Therefore, real-time and accurate monitoring of power cable temperature is of great importance.

[0003] Currently, resistance temperature measurement (RTD) technology is a widely used method for temperature measurement. RTDs utilize the thermal effect of the resistance value of a conductor or semiconductor to achieve temperature measurement. The resistance value changes continuously with temperature, and the temperature of the object being measured is calculated by measuring this resistance value. This temperature measurement method is mainly used to measure temperatures in the medium and low temperature range, and it features relatively stable performance and high measurement accuracy. Among the many RTD materials, platinum RTDs are the most widely used. Common standard temperature measurement RTDs on the market today, such as PT100, PT500, and PT1000, are all made of platinum. They have good linearity in the resistance-temperature relationship, high temperature sensitivity, and low cost, so they are widely used in industrial automation measurement and various medical devices.

[0004] However, in terms of power cable temperature monitoring, most existing temperature measuring devices adopt single-point resistance temperature measurement structures. Single-point measurement cannot fully cover the key parts of the cable, making it difficult to fully reflect the true situation of the cable sheath temperature. This can easily lead to the neglect of potential faults and cause serious accidents. Utility Model Content

[0005] The purpose of this disclosure is to provide a multi-point temperature measuring device for cables, which can simultaneously measure multiple points, providing more comprehensive coverage of the measurement areas of the cable, thereby improving the accuracy of cable surface temperature measurement and ensuring the safe and stable operation of power cables.

[0006] To achieve the above objectives, this disclosure provides a multi-point temperature measurement device for cables, including a clamp and multiple temperature measuring boxes. The multiple temperature measuring boxes are arranged circumferentially on the clamp. Each temperature measuring box includes a control module, a wireless communication module, a thermistor temperature measuring module, and a power supply module. The thermistor temperature measuring module and the wireless communication module are both electrically connected to the control module. The power supply module supplies power to the control module, the wireless communication module, and the thermistor temperature measuring module. The thermistor temperature measuring module is used to detect the surface temperature of the cable under test and transmit the temperature data to the control module. The wireless communication module encodes and modulates the temperature data processed by the control module and transmits it to a mobile terminal.

[0007] Optionally, the temperature measuring box is detachably connected to the clamp.

[0008] Optionally, the clamp is a metal clamp, the temperature measuring box is equipped with an induction coil, and the power supply module uses the magnetic field generated by the current in the cable under test, and converts the magnetic field energy into electrical energy through the metal clamp and the induction coil for power supply.

[0009] Optionally, the clamp includes a clamp body, a nut, and a locking member. The clamp body has a first tightening end and a second tightening end that is opposite to and spaced from the first tightening end. One end of the nut is connected to the first tightening end, and the other end is slidably connected to the second tightening end. The locking member is provided on the nut to lock the second tightening end.

[0010] Optionally, the locking member is constructed as a screw, and the nut has a screw hole in the radial direction, and the screw hole penetrates the side wall of the nut. The locking member is threadedly connected to the screw hole, and the end face of the locking member located inside the nut can abut against the second tightening end.

[0011] Optionally, it also includes a plurality of foam pads, which are spaced circumferentially on the clamp and elastically abut against the cable under test.

[0012] Optionally, at least one of the temperature measuring boxes is provided between two adjacent foam pads.

[0013] Optionally, the wireless communication module adopts a UART serial communication module.

[0014] Through the above technical solution, the multi-point temperature measurement device for cables disclosed herein, by setting multiple temperature measuring boxes and arranging them at intervals along the circumference on the clamp, can cover different positions on the surface of the cable under test. Compared with single-point measurement, it can monitor the surface temperature of the cable under test from all angles. For example, at the joint of the cable under test and in sections with heavy loads, it can capture the temperature changes in these areas in a timely manner, avoiding the omission of potential faults such as local overheating due to the limitations of single-point measurement, thus reflecting the surface temperature of the cable under test more accurately and comprehensively. At the same time, multiple temperature measuring boxes work simultaneously, and the temperature data they acquire complement and verify each other, avoiding deviations in measurement results due to interference from local environmental factors. In addition, this application uses a control module to comprehensively analyze and process the data transmitted by multiple temperature measuring boxes, which can effectively eliminate interference from individual abnormal data, improve the accuracy of temperature measurement, and thus enable timely and accurate grasp of the temperature information of the cable under test, prevent cable faults, and ensure reliable power supply to the power system.

[0015] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the structure of a cable multi-point temperature measuring device according to an embodiment of this disclosure.

[0018] Explanation of reference numerals in the attached figures

[0019] 1. Clamp; 101. First tightening end; 102. Second tightening end; 11. Clamp body; 12. Nut; 13. Locking component; 2. Temperature measuring box; 3. Foam gasket. Detailed Implementation

[0020] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0021] In this disclosure, unless otherwise stated, directional terms such as "inner" and "outer" refer to "inner" and "outer" relative to the contour of the corresponding component itself. Furthermore, the terms "first," "second," etc., used in this disclosure are for distinguishing one element from another and do not have sequential or importance implications. In the following description, when referring to the accompanying drawings, unless otherwise explained, the same reference numerals in different drawings denote the same or similar elements. The above definitions are for explanation and illustration only and should not be construed as limiting this disclosure.

[0022] According to exemplary embodiments of this disclosure, reference is made to Figure 1 As shown, a multi-point temperature measurement device for cables is provided, including a clamp 1 and multiple temperature measuring boxes 2. The multiple temperature measuring boxes 2 are arranged circumferentially on the clamp 1. Each temperature measuring box 2 includes a control module, a wireless communication module, a thermistor temperature measuring module, and a power supply module. The thermistor temperature measuring module and the wireless communication module are electrically connected to the control module. The power supply module supplies power to the control module, the wireless communication module, and the thermistor temperature measuring module. The thermistor temperature measuring module is used to detect the temperature of the surface of the cable under test and transmit the temperature data to the control module. The wireless communication module encodes and modulates the temperature data processed by the control module and transmits it to a mobile terminal.

[0023] Through the above technical solution, in the multi-point temperature measurement device for cables disclosed in this invention, by setting multiple temperature measuring boxes 2 and arranging them at intervals along the circumference on the clamp 1, different positions on the surface of the cable under test can be covered. Compared with single-point measurement, the surface temperature of the cable under test can be monitored in all directions. For example, at the joint of the cable under test and in sections with heavy loads, the temperature changes at these locations can be captured in a timely manner, avoiding the omission of potential faults such as local overheating due to the limitations of single-point measurement, thus reflecting the surface temperature of the cable under test more accurately and comprehensively. At the same time, multiple temperature measuring boxes 2 work simultaneously, and the temperature data they acquire complement and verify each other, avoiding deviations in measurement results due to interference from local environmental factors. In addition, this application uses a control module to comprehensively analyze and process the data transmitted by multiple temperature measuring boxes 2, which can effectively eliminate interference from individual abnormal data, improve the accuracy of temperature measurement, and thus enable timely and accurate grasp of the temperature information of the cable under test, prevent cable faults, and ensure reliable power supply to the power system.

[0024] In this disclosure, a clamp 1 is used to fix multiple temperature measuring boxes 2 onto the cable under test, enabling stable measurement of the cable's surface temperature. The multiple temperature measuring boxes 2 can be evenly arranged circumferentially, facilitating more comprehensive temperature detection of various parts of the cable. The thermistor temperature measuring module in the temperature measuring box 2 operates based on the characteristics of thermistors; the resistance value of the thermistor changes significantly with temperature. By measuring the change in resistance value, the cable surface temperature can be calculated, and the temperature data is then transmitted to the control module. The control module performs preliminary processing on the temperature data, such as data calibration and filtering, to improve the accuracy and reliability of the data. The wireless communication module encodes and modulates the processed temperature data, converting it into a signal format suitable for wireless transmission. This signal is then transmitted to a mobile terminal via a wireless communication network, allowing staff to obtain cable temperature information in real time, thus improving the convenience and real-time performance of temperature monitoring.

[0025] The control module can be a CC1310 control module; the thermistor temperature measurement module can be an NTC3950, which has high measurement accuracy and ensures the accuracy of temperature measurement. The temperature probe of the thermistor temperature measurement module is located outside the temperature measurement box 2 and is in contact with the cable under test to detect the temperature of the corresponding part of the cable under test.

[0026] According to exemplary embodiments of this disclosure, reference is made to Figure 1 As shown, the temperature measuring box 2 and the clamp 1 can be detachably connected. Specifically, the temperature measuring box 2 and the clamp 1 can be connected by threaded fasteners or by snap-fit ​​connection; this disclosure does not impose any specific limitations on this. This arrangement allows the temperature measuring box 2 to be easily installed on or removed from the clamp 1 according to actual needs. For example, during equipment maintenance, repair, or replacement of a faulty temperature measuring box 2, it can be easily removed from the clamp 1 without extensive disassembly of the entire device, improving the maintainability and flexibility of this multi-point temperature measuring device for cables. Simultaneously, the detachable connection method facilitates the installation and commissioning of the device; operators can flexibly adjust the number and installation position of the temperature measuring boxes 2 according to the actual condition of the cable and temperature measurement requirements, improving the applicability of the device.

[0027] According to an exemplary embodiment of this disclosure, the clamp 1 can be a metal clamp 1, and the temperature measuring box 2 is equipped with an induction coil. The power supply module utilizes the magnetic field generated by the current in the cable under test, and converts the magnetic field energy into electrical energy through the metal clamp 1 and the induction coil for power extraction. In the above technical solution, according to the principle of electromagnetic induction, when current flows through the cable under test, a magnetic field is generated around it. The metal clamp 1, as a magnetic conductor, can guide and concentrate the magnetic field. The induction coil on the temperature measuring box 2 is located in this magnetic field. As the magnetic field changes, an induced electromotive force is generated in the induction coil, thereby converting the magnetic field energy into electrical energy. The power supply module collects, converts, and stores the electrical energy generated by the induction coil, providing a stable power supply for the control module, the wireless communication module, and the thermistor temperature measuring module.

[0028] This disclosure employs electromagnetic induction for power generation, eliminating the need for additional power cables and preventing power supply failures caused by damaged or aging power cables, thus improving the stability and reliability of the device's power supply. Simultaneously, this power supply method reduces dependence on external power sources, lowering the installation and operating costs of the device and enabling its easier application in various complex cable environments.

[0029] According to exemplary embodiments of this disclosure, reference is made to Figure 1As shown, the clamp 1 may include a clamp body 11, a nut 12, and a locking member 13. The clamp body 11 has a first tightening end 101 and a second tightening end 102 opposite to and spaced from the first tightening end 101. One end of the nut 12 is connected to the first tightening end 101, and the other end is slidably connected to the second tightening end 102. The locking member 13 passes through the nut 12 to lock the second tightening end 102. This configuration allows the clamp 1 to be easily and quickly installed on cables of different diameters, improving the versatility of the device. By adjusting the tightness of the clamp 1, it is possible to ensure that the clamp 1 is in close contact with the surface of the cable under test, ensuring good heat conduction between the temperature measuring box 2 and the cable under test, and improving the accuracy of temperature measurement.

[0030] In this disclosure, one end of the nut 12 can be threadedly connected to the first tightening end 101. That is, an external thread that mates with the nut 12 can be provided on the first tightening end 101. With this arrangement, it is convenient to install and remove the nut 12, and the tightness of the clamp 1 can be adjusted selectively by adjusting the second tightening end 102 or the first tightening end 101, thereby improving the flexibility of use.

[0031] According to an exemplary embodiment of this disclosure, the locking member 13 can be constructed as a screw. A screw hole is provided on the nut 12 in the radial direction, and the screw hole penetrates the side wall of the nut 12. The locking member 13 is threadedly connected to the screw hole, and the end face of the locking member 13 located inside the nut 12 can abut against the second tightening end 102. When it is necessary to lock the clamp 1, the screw is screwed into the screw hole. As the screw is continuously screwed in, the end face of the screw located inside the nut 12 gradually abuts against the second tightening end 102, generating sufficient friction to prevent the second tightening end 102 from sliding inside the nut 12, thereby achieving the purpose of fixing the clamp 1.

[0032] According to exemplary embodiments of this disclosure, reference is made to Figure 1 As shown, the cable multi-point temperature measuring device may further include multiple foam pads 3, which are spaced circumferentially on the clamp 1 and elastically abut against the cable under test. In the above technical solution, the number of foam pads 3 can be three or more. The foam pads 3 have good elasticity, and when the clamp 1 is installed on the cable under test, the foam pads 3 will fit tightly against the surface of the cable under test, enabling the cable multi-point temperature measuring device to be stably installed on the cable under test. At the same time, the foam pads 3 effectively protect the surface of the cable under test, preventing the clamp 1 from directly contacting the surface of the cable under test and causing wear. In addition, the elastic abutment of the foam pads 3 can further improve the fit between the clamp 1 and the cable under test, ensuring the accuracy of temperature measurement.

[0033] According to exemplary embodiments of this disclosure, reference is made to Figure 1As shown, at least one temperature measuring box 2 can be provided between two adjacent foam pads 3. Exemplarily, one, two, three or more temperature measuring boxes 2 can be provided between two adjacent foam pads 3, which can be flexibly set according to actual usage requirements. Through the above arrangement, the space of the clamp 1 can be fully utilized, and multi-point and comprehensive monitoring of the cable surface temperature can be achieved without affecting the protective function of the foam pads 3.

[0034] According to an exemplary embodiment of this disclosure, the wireless communication module can be a UART serial communication module. The UART serial communication module enables communication between devices by sending and receiving serial data. In this multi-point temperature measurement device for cables, the UART serial communication module encodes and modulates the temperature data processed by the control module, converting it into a serial data signal, which is then transmitted to the mobile terminal via a wireless communication network. Using a UART serial communication module as the wireless communication module reduces the cost of the temperature measurement device while ensuring the stability and reliability of temperature data transmission.

[0035] Reference Figure 1 As shown, the usage of the cable multi-point temperature measuring device disclosed herein is detailed below:

[0036] First, adjust the tightness of the clamp 1 by rotating the nut 12 according to the diameter of the cable to be tested, install the clamp 1 on the cable to be tested, and lock it with the locking piece 13 to ensure that the clamp 1 fits tightly with the cable to be tested; then, according to the temperature measurement requirements, install multiple temperature measuring boxes 2 detachably on the clamp 1, and ensure that there is at least one temperature measuring box 2 between two adjacent foam pads 3.

[0037] After installation, the thermistor temperature measurement module in temperature measuring box 2 begins to detect the surface temperature of the cable under test and transmits the temperature data to the control module. After the control module processes the temperature data, the wireless communication module encodes and modulates the processed temperature data and transmits it to the mobile terminal through the wireless communication network. The staff can view the temperature information of the cable under test in real time through the mobile terminal, including temperature data from multiple points. When an abnormal temperature is detected, corresponding measures are taken in a timely manner to ensure the safe and stable operation of the power cable.

[0038] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0039] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0040] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A multi-point temperature measuring device for cables, characterized in that, The device includes a clamp (1) and multiple temperature measuring boxes (2), which are arranged circumferentially on the clamp (1). Each temperature measuring box (2) includes a control module, a wireless communication module, a thermistor temperature measuring module, and a power supply module. The thermistor temperature measuring module and the wireless communication module are electrically connected to the control module. The power supply module supplies power to the control module, the wireless communication module, and the thermistor temperature measuring module. The thermistor temperature measuring module is used to detect the temperature of the surface of the cable under test and transmit the temperature data to the control module. The wireless communication module encodes and modulates the temperature data processed by the control module and transmits it to a mobile terminal.

2. The cable multi-point temperature measuring device according to claim 1, characterized in that, The temperature measuring box (2) is detachably connected to the clamp (1).

3. The cable multi-point temperature measuring device according to claim 2, characterized in that, The clamp (1) is a metal clamp, and the temperature measuring box (2) is equipped with an induction coil. The power supply module uses the magnetic field generated by the current in the cable under test, and converts the magnetic field energy into electrical energy through the metal clamp and the induction coil to obtain power.

4. The cable multi-point temperature measuring device according to claim 3, characterized in that, The clamp (1) includes a clamp body (11), a nut (12) and a locking member (13). The clamp body (11) has a first tightening end (101) and a second tightening end (102) opposite to and spaced from the first tightening end (101). One end of the nut (12) is connected to the first tightening end (101), and the other end is slidably connected to the second tightening end (102). The locking member (13) is provided on the nut (12) to lock the second tightening end (102) through the locking member (13).

5. The cable multi-point temperature measuring device according to claim 4, characterized in that, The locking member (13) is constructed as a screw. The nut (12) has a screw hole in the radial direction, and the screw hole penetrates the side wall of the nut (12). The locking member (13) is threadedly connected to the screw hole, and the end face of the locking member (13) located inside the nut (12) can abut against the second tightening end (102).

6. The cable multi-point temperature measuring device according to any one of claims 1 to 5, characterized in that, It also includes multiple foam pads (3), which are spaced circumferentially on the clamp (1) and elastically abut against the cable to be tested.

7. The cable multi-point temperature measuring device according to claim 6, characterized in that, At least one of the temperature measuring boxes (2) is provided between two adjacent foam pads (3).

8. The cable multi-point temperature measuring device according to claim 1, characterized in that, The wireless communication module adopts a UART serial communication module.

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