Underground cable wireless observation device integrated on ground receiving equipment and observation method

Abstract

The invention is suitable for the technical field of underground cable wireless observation, and provides an underground cable wireless observation device and observation method integrated on ground receiving equipment, and the method comprises the following steps: S1, collecting the current temperature, humidity, pressure, gas composition and concentration, stress and current of a cable well through a detection assembly; s2, the collected data are sent to ground receiving equipment through a wireless transmission module, and the ground receiving equipment carries out data calculation, fault analysis and elimination and fault prediction according to the received collected data and carries out fault early warning according to the result of combining the data calculation, the fault analysis and elimination and the fault prediction. By monitoring key parameters such as temperature, humidity, pressure, gas composition and concentration, stress and current in the cable well in real time, potential problems can be found in time, early warning can be carried out, cable faults are effectively prevented, and stable operation of an urban power grid is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of underground cable wireless observation, and in particular to an underground cable wireless observation device and an observation method integrated with ground receiving equipment. Background Art

[0002] As a key component of urban underground infrastructure, cable wells play a vital role in ensuring the stable operation of urban power grids. When designing and constructing cable wells, multiple factors must be considered comprehensively, including not only their carrying capacity, but also waterproof performance, corrosion resistance, and whether they are easy to maintain and overhaul. In the process of urban planning, the location selection of cable wells is also an issue that needs to be carefully considered. It is necessary to ensure that their location is convenient for the access of power facilities and does not interfere with urban traffic and residents' daily lives. With the rapid development of urbanization, the intelligent management of cable wells has become an obvious trend. By installing various sensors and communication equipment in the cable well, real-time monitoring of the internal conditions of the cable well can be achieved, thereby significantly improving the safety and efficiency of power grid operation.

[0003] The observation of underground cables is a core link to ensure the safe and stable operation of cable wells. Traditionally, the observation method of underground cables often relies on manual inspection, which is not only time-consuming and labor-intensive, but also has certain safety risks. With the continuous advancement of wireless communication technology, underground cable wireless observation technology has emerged, which can realize remote, real-time and continuous cable status monitoring, significantly improving the efficiency and safety of observation. The application of this technology makes the maintenance and management of cable wells more efficient and safe.

[0004] Nevertheless, the wireless observation devices currently on the market usually need to be equipped with independent ground receiving equipment, which not only increases the complexity of the entire system, but also increases the cost accordingly. In addition, most existing observation equipment has limitations in observation items and cannot provide comprehensive fault analysis and monitoring. In view of these problems, the present invention proposes a new type of underground cable wireless observation device integrated with ground receiving equipment and its observation method. The purpose of this invention is to simplify the system structure, reduce construction and maintenance costs, and at the same time ensure the comprehensiveness, accuracy and reliability of the observation process, thereby providing more effective technical support for the safe operation of cable wells. Summary of the invention

[0005] The purpose of the present invention is to provide a downhole cable wireless observation device and observation method integrated with a ground receiving device, so as to solve the problem that wireless observation devices in the prior art often require independent ground receiving equipment, which increases the complexity and cost of the system, and moreover, most observation devices can perform relatively few observation items and cannot perform fault analysis and monitoring in an all-round manner.

[0006] To achieve the above object, the present invention provides the following technical solutions: In a first aspect, the present invention provides a downhole cable wireless observation method integrated in a ground receiving device, comprising the following steps:

[0007] S1, collects the current temperature, humidity, pressure, gas composition and concentration, stress and current of the cable well through the detection component;

[0008] S2, the collected data is sent to the ground receiving device through the wireless transmission module. The ground receiving device performs data calculation, fault analysis and troubleshooting, and fault prediction based on the received collected data, and makes a fault warning based on the results of combining data calculation, fault analysis and troubleshooting, and fault prediction.

[0009] Preferably, the data calculation includes cable load current calculation, and the formula is as follows:

[0010]

[0011] Where I is the load current, S is the cable cross-sectional area, T max is the maximum operating temperature of the cable, T a is the real-time ambient temperature, and R is the cable thermal resistance.

[0012] Preferably, the data calculation includes cable stress calculation, and the formula is as follows:

[0013]

[0014] Among them, σ is the total stress, σ1 is the tensile stress, σ2 is the bending stress, and σ3 is the compressive stress.

[0015] Preferably, the data calculation includes cable strain calculation, and the formula is as follows:

[0016]

[0017] Among them, ε is the total strain, ε1 is the tensile strain, ε2 is the bending strain, and ε3 is the compressive strain.

[0018] Preferably, the data calculation includes cable life prediction calculation, and the formula is as follows:

[0019]

[0020] Where Y is the cable life, L0 is the life under reference conditions, E a is the activation energy, k is the Boltzmann constant, and T is the real-time temperature.

[0021] The second aspect of the present invention provides a downhole cable wireless observation device using the method described in the first aspect of the present invention, comprising a detection component and a ground receiving device;

[0022] The detection assembly includes a gas monitoring unit, a temperature monitoring unit, a humidity monitoring unit, a stress monitoring unit and an electrical monitoring unit;

[0023] The ground receiving equipment includes a data calculation module, a fault analysis and elimination module, a fault prediction module, a fault warning module and a display module.

[0024] Preferably, the gas monitoring unit includes a Sensepoint XCD sensor, a TGS 8130 sensor and a Honeywell-26PC Series air pressure sensor; the temperature monitoring unit includes a PT1000 sensor; the humidity detection unit includes a Bosch BME280 sensor; the stress monitoring unit includes an FBG sensor and a MEMS sensor; and the electrical monitoring unit includes an FBG current sensor.

[0025] Preferably, the fault analysis and troubleshooting module has preset thresholds of temperature, humidity, pressure, gas composition and concentration, stress and current, and analyzes and troubleshoots the faults by comparing the collected data with the thresholds.

[0026] Preferably, the fault prediction module is preset with thresholds of load current, total cable stress and total strain, and cable life, and estimates the risk and probability of fault by analyzing the calculated data.

[0027] Preferably, the fault warning module warns of cable faults, and the display module displays various collected data, calculated data and faults of the cable on a display screen.

[0028] The present invention has at least the following beneficial effects:

[0029] (1) The present invention relates to a downhole cable wireless observation device integrated with a ground receiving device and an observation method thereof. The device and method can timely detect potential problems and issue early warnings by real-time monitoring of key parameters such as temperature, humidity, pressure, gas composition and concentration, stress, and current in the cable well, effectively preventing the occurrence of cable failures and ensuring the stable operation of the urban power grid. The application of this innovative technology not only improves the accuracy of environmental monitoring in the cable well, but also realizes the rapid and accurate transmission of data through wireless transmission, thereby providing strong technical support for the stable operation of the power grid.

[0030] (2) The underground cable wireless observation device and observation method integrated with the ground receiving equipment proposed in the present invention can realize real-time monitoring of the internal conditions of the cable well. The application of this real-time monitoring technology has significantly improved the safety and efficiency of power grid operation. By integrating the underground cable wireless observation device with the ground receiving equipment, the system structure can be simplified and the cost can be reduced while ensuring the comprehensiveness, accuracy and reliability of the observation. This innovative solution not only improves the efficiency of environmental monitoring in the cable well, but also reduces the dependence on wired connections through the application of wireless technology, making system maintenance and upgrades more convenient.

[0031] (3) The underground cable wireless observation device and observation method integrated with the ground receiving equipment provided by the present invention reduce the need for manual inspection in the well, thereby reducing safety risks and maintenance costs. Through this wireless observation technology, key parameter information in the cable well can be obtained remotely, avoiding the need for personnel to directly enter dangerous environments for inspection, greatly improving the safety of operations. At the same time, since the frequency of manual inspections is reduced, maintenance costs are significantly reduced and economic benefits are improved. The application of this technology provides a more efficient and economical solution for the daily maintenance and management of cable wells. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the underground cable wireless observation device of the present invention;

[0033] Figure 2 It is a schematic diagram of the flow of the observation method of the present invention. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Example 1

[0036] like Figure 1 As shown, this embodiment provides a downhole cable wireless observation device integrated with a ground receiving device, including a detection component and a ground receiving device.

[0037] The detection component consists of multiple monitoring units, including gas monitoring unit, temperature monitoring unit, humidity monitoring unit, stress monitoring unit and electrical monitoring unit. The gas monitoring unit is equipped with Sensepoint XCD sensor, TGS 8130 sensor and Honeywell-26PC Series pressure sensor, which are used to detect and monitor the gas composition, concentration and pressure inside the cable well and collect relevant data. The temperature monitoring unit uses PT1000 sensor to monitor the real-time temperature inside the cable well and collect temperature data in real time. The humidity detection unit uses Bosch BME280 sensor to monitor and collect the real-time humidity inside the cable well. The stress monitoring unit includes FBG sensor and MEMS sensor, which are used to monitor and collect the stress of the cable. The electrical monitoring unit uses FBG current sensor, which is responsible for monitoring and collecting the real-time current of the cable.

[0038] The gas monitoring unit is responsible for accurately detecting the gas composition, concentration and pressure inside the cable well and collecting this data in real time. The temperature monitoring unit continuously monitors the real-time temperature inside the cable well and records the collected temperature data. The humidity monitoring unit monitors the humidity level inside the cable well in real time and collects the corresponding humidity data. The stress monitoring unit focuses on monitoring the stress state of the cable and collecting stress data. The electrical monitoring unit is responsible for monitoring the real-time current of the cable and recording the collected current data.

[0039] The various data collected by the detection components will be transmitted to the ground receiving equipment. The ground receiving equipment consists of multiple key modules, including data calculation module, fault analysis and troubleshooting module, fault prediction module, fault warning module and display module.

[0040] The fault analysis and troubleshooting module presets thresholds for multiple key parameters, including temperature, humidity, pressure, gas composition and concentration, stress, and current. The module analyzes and troubleshoots possible faults by comparing the collected data with these preset thresholds. If the collected data is lower than the set threshold, the system will output a normal signal and pass the data to the next data calculation module; conversely, if the data is higher than the threshold, an abnormal signal will be output and the data will be transmitted to the fault warning module for corresponding alarm processing.

[0041] The fault prediction module presets thresholds for load current, total cable stress and strain, and cable life. By analyzing and calculating the collected data, the module can estimate the risk and probability of faults, thereby providing predictive maintenance for the safe operation of the cable well. Data calculation mainly includes the following aspects:

[0042] ①. Cable load current calculation, the formula is as follows:

[0043]

[0044] Where I is the load current, S is the cable cross-sectional area, T max is the maximum operating temperature of the cable, T a is the real-time ambient temperature, and R is the thermal resistance of the cable. According to this formula, the maximum current that the cable can withstand under specific conditions can be accurately calculated. It should be noted that the thermal resistance value of the cable will be affected by the cable material and the laying method. Therefore, in practical applications, the thermal resistance value must be determined according to the specific specifications of the cable and the laying environment. In addition, in order to ensure the safe operation of the cable, the calculated load current should not exceed 80% of the rated current of the cable to leave a certain safety margin.

[0045] ②. Cable stress calculation, the formula is as follows:

[0046]

[0047] Among them, σ is the total stress, σ1 is the tensile stress, σ2 is the bending stress, and σ3 is the compressive stress. According to this formula, the stress distribution of the cable under different working conditions can be accurately calculated. By analyzing these stress values, the load-bearing capacity of the cable can be evaluated to ensure its safety and reliability in practical applications.

[0048] ③. Cable strain calculation, the formula is as follows:

[0049]

[0050] Among them, ε is the total strain, ε1 is the tensile strain, ε2 is the bending strain, and ε3 is the compressive strain.

[0051] The formula for calculating strain from stress is as follows:

[0052]

[0053] Among them, ε x is the corresponding strain of ε1, ε2, ε3, σ x is the corresponding stress of σ1, σ2, σ3, and E is the Young's modulus of the cable. Through this calculation formula, the corresponding strain can be calculated by detecting the collected stress.

[0054] The above formula can accurately evaluate the strain of the cable under different working conditions. By regularly monitoring the strain of the cable, potential problems can be discovered in time, thereby preventing failures and ensuring the safe and stable operation of the system.

[0055] ④. Cable life prediction calculation, the formula is as follows:

[0056]

[0057] Where Y is the cable life, L0 is the life under reference conditions, E a is the activation energy, k is the Boltzmann constant, and T is the real-time temperature.

[0058] The module uses advanced algorithms combined with the real-time operating parameters of the cable, such as current, voltage, temperature, etc., to continuously monitor the health of the cable.

[0059] The fault warning module warns of cable faults; the display module displays various collected data, calculated data and faults of the cable on the display screen.

[0060] When a potential fault risk is detected, the fault warning module will issue an alarm in time to remind maintenance personnel to conduct inspections and maintenance, thereby avoiding sudden cable failures and ensuring the stable operation of the power system. The display module displays various observation data and results of the cable well in an intuitive way.

[0061] Example 2

[0062] like Figure 2 The present embodiment provides a method for wireless observation of underground cables integrated with a ground receiving device, comprising the following steps:

[0063] S1, collects the current temperature, humidity, pressure, gas composition and concentration, stress and current of the cable well through detection components; these data are crucial to the operation of the cable well because they can reflect the real-time changes in the internal environment of the cable well.

[0064] S2, the collected data is sent to the ground receiving device through the wireless transmission module. The ground receiving device performs data calculation, fault analysis and troubleshooting and fault prediction based on the collected data received, and makes a fault warning based on the results of data calculation, fault analysis and troubleshooting and fault prediction. This process ensures the safe operation of the cable well. Through timely fault warning, potential faults and accidents can be effectively avoided, ensuring the stability and reliability of the entire power system.

[0065] This method can realize real-time monitoring of the operation status of the cable well, and timely detect and deal with abnormal situations. The ground receiving equipment will feed back the processed information to the operator, and the operator will make decisions based on the feedback information and take corresponding maintenance measures. This link is the key to ensuring the long-term and stable operation of the cable well. Through accurate monitoring and timely maintenance, the service life of the cable well can be extended and maintenance costs can be reduced. The entire process is managed by an automated system, which greatly improves work efficiency and reduces human operation errors. In addition, this method has good scalability, and more detection parameters and functions can be added as needed to meet the needs of cable well monitoring under different environments and conditions.

[0066] The underground cable wireless observation device and its observation method involved in the present invention have the advantage of significantly improving the efficiency and accuracy of cable well monitoring compared to the currently commonly used technical means. By integrating the wireless observation device into the ground receiving equipment, the present invention realizes the real-time monitoring function of the internal condition of the cable well. In this way, the staff can promptly discover potential problems underground and quickly issue early warning signals, thereby effectively preventing the occurrence of cable failures. In addition, the device and method of the present invention can also greatly reduce the number of times manual inspections are required, which not only reduces the safety risks faced by the staff, but also reduces maintenance costs. At the same time, by simplifying the system structure, the present invention further reduces the overall cost. Overall, the present invention ensures the comprehensiveness, accuracy and reliability of cable well observation, and provides a more efficient and safe solution for the monitoring and management of cable wells.

[0067] The above shows and describes the basic principles, main features and advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0068] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A downhole cable wireless observation method integrated with a ground receiving device, characterized in that: The following steps are involved: S1, collects the current temperature, humidity, pressure, gas composition and concentration, stress and current of the cable well through the detection component; S2, the collected data is sent to the ground receiving device through the wireless transmission module. The ground receiving device performs data calculation, fault analysis and troubleshooting, and fault prediction based on the received collected data, and makes a fault warning based on the results of combining data calculation, fault analysis and troubleshooting, and fault prediction.

2. The method for underground cable wireless observation integrated with ground receiving equipment according to claim 1, characterized in that: The data calculation includes the cable load current calculation, the formula is as follows: Where I is the load current, S is the cable cross-sectional area, T max is the maximum operating temperature of the cable, T a is the real-time ambient temperature, and R is the cable thermal resistance.

3. The method for underground cable wireless observation integrated with ground receiving equipment according to claim 1, characterized in that: The data calculation includes cable stress calculation, the formula is as follows: Among them, σ is the total stress, σ1 is the tensile stress, σ2 is the bending stress, and σ3 is the compressive stress.

4. The method for underground cable wireless observation integrated with ground receiving equipment according to claim 1, characterized in that: The data calculation includes cable strain calculation, the formula is as follows: Among them, ε is the total strain, ε1 is the tensile strain, ε2 is the bending strain, and ε3 is the compressive strain.

5. The method for underground cable wireless observation integrated with ground receiving equipment according to claim 1, characterized in that: The data calculation includes cable life prediction calculation, the formula is as follows: Where Y is the cable life, L0 is the life under reference conditions, E a is the activation energy, k is the Boltzmann constant, and T is the real-time temperature.

6. A downhole cable wireless observation device using the observation method according to any one of claims 1 to 5, characterized in that: Includes detection components and ground receiving equipment; The detection assembly includes a gas monitoring unit, a temperature monitoring unit, a humidity monitoring unit, a stress monitoring unit and an electrical monitoring unit; The ground receiving equipment includes a data calculation module, a fault analysis and elimination module, a fault prediction module, a fault warning module and a display module.

7. The underground cable wireless observation device according to claim 6 is characterized in that: The gas monitoring unit includes a Sensepoint XCD sensor, a TGS 8130 sensor and a Honeywell-26PC Series air pressure sensor; the temperature monitoring unit includes a PT1000 sensor; the humidity detection unit includes a Bosch BME280 sensor; the stress monitoring unit includes an FBG sensor and a MEMS sensor; and the electrical monitoring unit includes an FBG type current sensor.

8. The underground cable wireless observation device according to claim 6, characterized in that: The fault analysis and troubleshooting module is preset with thresholds of temperature, humidity, pressure, gas composition and concentration, stress and current, and analyzes and troubleshoots faults by comparing the collected data with the thresholds.

9. The underground cable wireless observation device according to claim 6, characterized in that: The fault prediction module is preset with thresholds of load current, total cable stress and total strain, and cable life, and estimates the risk and probability of fault by analyzing the data calculated.

10. The underground cable wireless observation device according to claim 6, characterized in that: The fault warning module warns of cable faults, and the display module displays various collected data, calculated data and faults of the cable through a display screen.

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