Contact type wire temperature measuring device and temperature measuring system

Abstract

The utility model discloses a contact type wire temperature measuring device and a temperature measuring system, the contact type wire temperature measuring device is installed on a preset wire and comprises a solar charging housing, and a lithium battery, a charging and discharging management module, a temperature sensing probe and a Lora module which are arranged in an inner cavity of the solar charging housing; wherein the solar charging shell and the lithium battery form a dual-power-supply system, and the dual-power-supply system is controlled by the charging management module; the temperature sensing probe is used for measuring the temperature of the wire; and the Lora module is used for transmitting the temperature measurement data acquired by the temperature sensing probe to a preset host. The technical scheme provided by the utility model can resist electromagnetic interference so as to provide a stable and reliable communication line and cope with a complex electromagnetic environment of a power transmission line; reference is provided for operation and maintenance personnel to know the actual on-site operation condition through remote sensing, the operation and maintenance work efficiency is improved, and the operation and maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wire clamp temperature measurement, in particular to a contact type wire temperature measurement device and a temperature measurement system. Background Art

[0002] Wire clamps are important hardware used to secure conductors and withstand conductor tension on high-voltage transmission lines. However, in high-temperature environments, the physical properties of metals change, which can cause a series of problems with wire clamps.

[0003] On the one hand, high temperatures cause metal to expand. Metal's coefficient of thermal expansion determines the extent to which its volume changes with temperature. When ambient temperature rises, the metal material in the cable clamp expands, potentially increasing internal stress. If this stress exceeds the material's tolerance, the clamp may deform, crack, or even break. This can be extremely detrimental to the safe and stable operation of the power system.

[0004] High temperatures can also affect the electrical performance of cable clamps. The resistivity of metal materials increases with temperature, meaning that in high-temperature environments, the resistance of the cable clamp increases. This not only increases energy loss during transmission but can also cause overheating, further damaging the clamp. Furthermore, high temperatures can cause metal materials to oxidize, forming an oxide film, which can also affect the electrical performance of the cable clamp.

[0005] Therefore, to monitor the temperature of wire clamps in real time, existing temperature measuring wire clamps with temperature measurement functions are increasingly being used. However, these measurement principles are mostly based on traditional thermal resistor temperature sensors, which measure the temperature based on the thermal effect of the resistor. However, this method has poor resistance to electromagnetic interference and can cause serious accidents if the insulation of the resistor leads is damaged. Furthermore, existing temperature measuring wire clamps have relatively limited functions and cannot meet the increasingly demanding market requirements. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art, the utility model provides a contact-type wire temperature measuring device and a temperature measuring system.

[0007] A contact wire temperature measuring device, comprising:

[0008] The contact-type wire temperature measurement device is installed on a preset wire and includes: a solar charging shell, and a lithium battery, a charge and discharge management module, a temperature probe, and a Lora module arranged in the inner cavity of the solar charging shell. The solar charging shell and the lithium battery form a dual power supply system and are controlled by the charge and discharge management module. The temperature probe is used to measure the temperature of the wire; and the Lora module is used to transmit the temperature measurement data obtained by the temperature probe to a preset host.

[0009] A temperature measurement system includes the contact wire temperature measurement device as described above, and the preset host; the preset host includes a solar panel, a lithium battery, a power charge and discharge management module, a data acquisition and processing module, and a communication module; wherein the solar panel and the lithium battery constitute a dual power supply system and are controlled by the power charge and discharge management module; the data acquisition and processing module is used to obtain and process the temperature measurement data; and the communication module is used to send the data processed by the data acquisition and processing module to a preset power platform.

[0010] The contact-type wire temperature measuring device provided by the utility model has the capabilities of self-detection, self-recovery, and self-identification. Its solar charging housing and lithium battery constitute a dual power supply system for the sensor. In fine weather, solar energy is converted into electrical energy, which is directly supplied to the sensor for operation and simultaneously charges the partially charged lithium battery. At night or in bad weather, the lithium battery directly supplies power, achieving the purpose of 24-hour uninterrupted operation. Its temperature sensing probe especially adopts platinum resistance, which can accurately measure the actual temperature of the wire and facilitate the host to compensate for the acquired temperature. It adopts Lora module for communication, which can resist electromagnetic interference, provide a stable and reliable communication line, and cope with the complex electromagnetic environment of the transmission line.

[0011] The temperature measurement system provided by the present invention can be remotely connected to a device or on a central platform after the system is powered on to manually or periodically collect on-site temperature data. After the system receives the data transmitted by the temperature sensor, the system processes the data through the data acquisition and processing module, identifies and stores the data, and transmits it to the communication module, and the communication module transmits the received data to the central platform; that is, the contact wire temperature measuring device uses a platinum resistor to measure the temperature, and the host uses software and hardware temperature compensation technology to measure the real-time temperature of the wire clamp, and then sends it to the power platform through a 4G network or other means. Remote perception provides a reference for operation and maintenance personnel to understand the actual operating conditions on site, helps improve operation and maintenance work efficiency, and reduces operation and maintenance costs.

[0012] This contact wire temperature measurement device and system is based on an optimized temperature sensing element and features high reliability, high precision, low power consumption, and long standby time. It also has the following functions:

[0013] (1) Reliable wireless transmission based on Lora communication between the host and the temperature measuring device can cope with the complex electromagnetic environment of the transmission line;

[0014] (2) Identity recognition algorithm, the temperature measuring device and the host achieve two-way matching, improving communication security;

[0015] (3) The temperature measuring device has ultra-low power consumption and can achieve ultra-long standby time;

[0016] (4) The temperature measuring device and the host are powered by solar energy and batteries, and can work uninterruptedly;

[0017] (5) The temperature measurement device antenna implements enhanced signal processing to cope with complex field environments;

[0018] (6) The solar housing of the temperature measuring device is designed to be portable and easy to install;

[0019] (7) Have interference source shielding and filtering algorithms;

[0020] (8) The host supports LTE-TDD / LTE-FDD / TD-SCDMA / EVDO / UMTS / 4CDMA1 x / GSM 4G wireless network transmission and supports Micro SIM;

[0021] (9) The host can remotely query / set device parameters, including the temperature measurement device's ID, heartbeat cycle, networking parameters, etc.;

[0022] (10) The host has the function of automatic time calibration;

[0023] (11) The host can realize wireless upgrade function of the temperature measuring device;

[0024] (12) The host has a large-capacity memory that can cyclically store more than 90 days of temperature measurement data;

[0025] (13) Support remote software upgrade. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the working principle of the contact wire temperature measurement system in an embodiment of the present utility model;

[0027] Figure 2 This is a three-dimensional diagram of a contact wire temperature measuring device in an embodiment of the present utility model;

[0028] Figure 3 This is an exploded view of the contact wire temperature measuring device in an embodiment of the present utility model;

[0029] Figure 4 A three-dimensional diagram of the host in the embodiment of the present utility model;

[0030] Figure 5 This is a framework diagram of a temperature measurement system in an embodiment of the present utility model;

[0031] The symbols in the drawings of the specification are as follows:

[0032] 1. Contact wire temperature measuring device; 11. Solar charging housing; 12. Lithium battery; 13. PCBA board; 14. Clamping part; 2. Host; 3. Wire. DETAILED DESCRIPTION

[0033] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0034] Provide a contact wire temperature measuring device and a temperature measuring system, such as Figures 1 to 5 As shown. The contact wire temperature measuring device 1 is installed on a preset wire 3 and includes: a solar charging shell 11, a lithium battery 12 arranged in the inner cavity of the solar charging shell, a charge and discharge management module, a temperature probe and a Lora module. The solar charging shell and the lithium battery constitute a dual power supply system and are controlled by the charge and discharge management module. That is, when the weather is fine, solar energy is converted into electricity to directly supply the sensor to work, while charging the partially charged lithium battery. At night or in bad weather, the lithium battery directly supplies power to achieve 24-hour uninterrupted operation; preferably, the solar charging shell is an integrated structure. The temperature probe is used to measure the temperature of the wire. The Lora module is used to transmit the temperature measurement data obtained by the temperature probe to the preset host.

[0035] Furthermore, the temperature sensing probe includes a platinum resistor, which is used as a temperature sensing element and has good accuracy and stability.

[0036] In one implementation, the contact wire temperature measuring device includes a clamping member 14 and a PCBA board 13 connected to the clamping member; the temperature probe, Lora module, and lithium battery are all arranged on the PCBA board; the clamping member is used to clamp a preset wire.

[0037] The temperature measurement system includes a contact wire temperature measurement device 1 and a host 2. The host includes a solar panel, a lithium battery, a power charge and discharge management module, a data acquisition and processing module, and a communication module. The solar panel and the lithium battery constitute a dual power supply system and are controlled by the power charge and discharge management module. The data acquisition and processing module is used to acquire and process temperature measurement data. The communication module is used to send the data processed by the data acquisition and processing module to a preset power platform (cloud server).

[0038] Specifically, solar panels convert solar radiation into electricity to charge lithium batteries and power the system. Lithium-ion batteries serve as energy storage devices. When sunlight is abundant, the energy generated by the solar panels far exceeds the system's consumption. The excess energy is stored in the lithium-ion batteries for use when sunlight is absent (e.g., at night or on rainy days), enabling 24 / 7 uninterrupted operation. The power charge and discharge management module monitors system power usage in real time, promptly controlling the power supply of each functional module and monitoring the charge and discharge status of the lithium batteries to ensure they are not overcharged or over-discharged, ensuring they can safely provide energy for the equipment.

[0039] The data acquisition and processing module includes: an interface unit, a central processing unit, and a storage unit; the data acquisition and processing module processes the acquired sensor, image and other data, identifies, stores and transmits them to the communication module.

[0040] The communication module includes a low-power, all-network 4G module that supports 2G / 3G / 4G networks from China Unicom, China Mobile, and China Telecom. The host's communication module enables remote control and monitoring of device operating status, as well as backend access to sensor and image data uploaded by the device to assess on-site conditions. The host also features remote upgrade capabilities, making product upgrades more convenient and significantly improving product practicality.

[0041] Furthermore, the data acquisition and processing module performs temperature compensation on the temperature measurement data. Under normal circumstances, the resistance of a positive temperature coefficient (PTC) resistor (RTR) exhibits a linear relationship with temperature. However, due to factors such as material purity and processing technology, a nonlinear relationship exists between the two. Therefore, temperature compensation is performed on the platinum resistor by introducing measurement errors. The principle of temperature compensation is to measure the ambient temperature and adjust the resistance of the platinum resistor accordingly, thereby eliminating the impact of ambient temperature changes on the measurement results.

[0042] Specifically, the actual resistance value of the platinum resistor at the current ambient temperature is calculated based on the platinum resistor's resistance-temperature characteristic curve and the ambient temperature, and is output as the measurement result. In one implementation, two methods are used to perform temperature compensation on the platinum resistor: hardware compensation and software compensation:

[0043] 1) Hardware compensation: By adding auxiliary components (such as thermistors and op amps) to the circuit, the resistance-temperature characteristic curve of the platinum resistor is simulated and the resistance value of the platinum resistor is automatically adjusted as the ambient temperature changes. This method has the advantages of high compensation accuracy and good stability.

[0044] 2) Software Compensation: By collecting the resistance values ​​of a platinum resistor at different ambient temperatures, the program calculates the actual resistance value of the platinum resistor at the current ambient temperature using a compensation algorithm. This method offers the advantages of low cost and good flexibility. With continuous debugging and optimization, the program's reliability is highly guaranteed.

[0045] The above is an explanation of the technical solution of the present invention to help understand the present invention; however, the implementation of the present invention is not limited to the above embodiments, and any changes, modifications, substitutions, combinations, and simplifications made without departing from the principles of the present invention should be considered equivalent replacement methods and are included in the scope of protection of the present invention.

Claims

1. A contact wire temperature measuring device, characterized in that: The contact-type wire temperature measurement device is installed on a preset wire and includes: a solar charging shell, and a lithium battery, a charge and discharge management module, a temperature probe, and a Lora module arranged in the inner cavity of the solar charging shell. The solar charging shell and the lithium battery form a dual power supply system and are controlled by the charge and discharge management module. The temperature probe is used to measure the temperature of the wire; and the Lora module is used to transmit the temperature measurement data obtained by the temperature probe to a preset host.

2. The contact wire temperature measuring device according to claim 1, wherein: The temperature sensing probe includes a platinum resistor.

3. The contact wire temperature measuring device according to claim 1, wherein: It also includes a clamping part and a PCBA board connected to the clamping part; the temperature probe, Lora module, and lithium battery are all arranged on the PCBA board; the clamping part is used to clamp the preset wire.

4. The contact wire temperature measuring device according to any one of claims 1 to 3, characterized in that: The solar charging housing is an integrated structure.

5. A temperature measurement system, characterized in that: It comprises the contact wire temperature measuring device according to any one of claims 1 to 4, and the preset host; the preset host comprises a solar panel, a lithium battery, a power charge and discharge management module, a data acquisition and processing module, and a communication module; wherein the solar panel and the lithium battery constitute a dual power supply system and are controlled by the power charge and discharge management module; the data acquisition and processing module is used to obtain and process the temperature measurement data; and the communication module is used to send the data processed by the data acquisition and processing module to a preset power platform.

6. The temperature measurement system according to claim 5, characterized in that: The data acquisition and processing module processes the temperature measurement data, including: performing temperature compensation on the temperature measurement data.

7. The temperature measurement system according to claim 5, characterized in that: The communication module includes a 4G network module.

8. The temperature measurement system according to claim 5, characterized in that: The data acquisition and processing module includes an interface unit, a central processing unit and a storage unit.

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