Transmission line state monitoring sensor based on dielectric polarization

Abstract

The invention relates to a power transmission line state monitoring sensor based on dielectric polarization. The invention relates to the technical field of self-powered sensors, in order to monitor the voltage of a power transmission line in real time, and adopts the scheme that the self-powered sensor comprises a sealing plug; the electrodes comprise an inner electrode and an outer electrode, the inner electrode is completely placed in the liquid dielectric medium, and the outer electrode is installed on the outer side of the sensor shell; a liquid dielectric; according to the sensor shell, the silica gel hose which is high in flexibility, stable in performance and environmentally friendly is selected as a shell material of the sensor, and the outer electrode is fixed to the outer surface of the silica gel hose so as to sense inductive charges generated due to the liquid dielectric polarization effect. And in the process, bubbles are prevented from remaining in the pipe to the greatest extent, so that the precision of the sensor is not influenced. The inner electrode is inserted into water and is connected with the inner electrode and the outer electrode through wires to serve as test interfaces. Finally, the sealing end cover is fixed to the other port of the hose, and sealing is achieved through the waterproof glue coating.

Description

Technical Field

[0001] The invention relates to the technical field of self-powered sensors, in particular to a power transmission line state monitoring sensor based on dielectric polarization. Background Art

[0002] With the rapid development of society, the demand for electricity for production and life continues to increase. Current and voltage instability caused by aging wires, icing or other external factors seriously threaten the safe operation of transmission lines. If they cannot be monitored in time, large-scale line failures and significant economic losses will occur. Current and voltage are very important parameters in fault detection of transmission lines. Real-time monitoring of current and voltage signals can effectively avoid the above situation and ensure the stable operation of transmission lines. Traditional transmission line status monitoring sensors are complex to install, the test accuracy is easily affected by the environment, and they require external power supply, making them difficult to be widely promoted and applied.

[0003] Therefore, there is an urgent need to design a new type of transmission line condition monitoring sensor with simple structure, easy integration, high accuracy, stability and reliability to meet the needs of miniaturization and intelligence of smart grid sensors. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention can realize real-time monitoring of the voltage of the power transmission line.

[0005] The present invention provides a transmission line condition monitoring sensor based on dielectric polarization, and the present invention provides the following technical solutions:

[0006] A power transmission line state monitoring sensor based on dielectric polarization, the sensor comprising: a sealing plug, an electrode, a liquid dielectric and a sensor housing, the sealing plug and the sensor housing are interference fit at both ends and fixed with waterproof glue;

[0007] The electrode includes an inner electrode and an outer electrode, the inner electrode is completely placed in a liquid dielectric, the outer electrode is installed on the outside of the sensor housing, and there are two dielectrics, a silicone hose and pure water, between the inner electrode and the outer electrode. Under the action of an external electric field, the liquid dielectric undergoes a dielectric polarization effect, and corresponding charges are induced on the inner electrode and the outer electrode. The induced charges flow back and forth between the two interdigitated electrodes to generate an AC signal.

[0008] Preferably, the liquid dielectric material is pure water, and the sensor housing material is silica gel.

[0009] Preferably, the electrode is made of copper and is connected to a display device via an external wire to perform testing and calibration of the sensor output signal.

[0010] Preferably, the sealing plug is made of silicone, which is the same material as the sensor housing, and the size is selected according to the inner diameter of the sensor housing.

[0011] Preferably, the sensor housing is non-contact with the measured object, does not undergo mechanical movement, and is not affected by external direct contact forces.

[0012] Preferably, the liquid dielectric produces a molecular polarization effect under the action of an alternating electric field, and the dipole polarization direction changes continuously according to the alternating frequency direction of the external electric field in which it is located, generating a changing dipole moment, and then generating an electric potential difference between the two electrodes according to the principle of electrostatic induction. The two electrodes are connected by an external wire, and the sensor generates a current signal output, and the frequency of the output signal is the same as the frequency of the external electric field in which it is located.

[0013] An intelligent monitoring system for preventing electric shock is based on a transmission line status monitoring sensor based on dielectric polarization. The system is characterized in that by real-time monitoring of the status of the power supply, abnormal conditions can be detected in time and an alarm can be issued. When the system detects a risk of electric shock, an alarm will be issued immediately and the power supply will be cut off in combination with an automatic control circuit.

[0014] A test method for a transmission line condition monitoring sensor based on dielectric polarization, the method is based on a transmission line condition monitoring sensor based on dielectric polarization, and comprises the following steps:

[0015] Step 1: Determine the charge transfer mechanism of liquid molecule polarization, use multi-physics field simulation software to simulate and analyze the sensor, and determine the influence of the alternating electric field size and dielectrics with different dielectric constants on the sensor output performance;

[0016] Step 2: Use an electrostatic collection device to record the AC signal generated by the sensor, and test the change of the sensor output signal when the state of the transmission line changes;

[0017] Step 3: Based on the characteristics of the sensor, combine it with household and industrial power transmission lines to achieve applications in power safety and smart grid.

[0018] A computer-readable storage medium stores a computer program, which is executed by a processor to implement a test method for a power transmission line condition monitoring sensor based on dielectric polarization.

[0019] A computer device comprises a memory and a processor, wherein the memory stores a computer program, and the processor implements a test method for a power transmission line state monitoring sensor based on dielectric polarization when executing the computer program.

[0020] The present invention has the following beneficial effects:

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] The invention proposes a transmission line state monitoring sensor based on dielectric polarization and a transmission line state monitoring sensor testing method based on dielectric polarization. When the transmission line is operating normally, the sensor is placed at the corresponding position of the transmission line. Under the action of the AC electric field, the pure water inside it undergoes a molecular polarization effect, and the dipole polarization direction changes continuously according to the AC frequency direction of the external electric field in which it is located, generating a changing dipole moment. Then, according to the principle of electrostatic induction, a potential difference is generated between the two electrodes. The two electrodes are connected by an external wire, and the sensor generates a current signal output, and the frequency of the output signal is the same as the frequency of the external electric field in which it is located. Therefore, the AC signal generated by the sensor is collected and related calculations are performed to obtain the voltage information of the transmission line. Since the sensor adopts a non-contact mode, it has an ultra-long service life and extremely high stability, and can realize self-driven sensing, a wide detection range, and high detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the structure of a transmission line condition monitoring sensor based on dielectric polarization;

[0025] Figure 2 is a schematic flow chart of the fabrication of a transmission line condition monitoring sensor based on dielectric polarization;

[0026] Figure 3 It is a schematic diagram of the dielectric polarization process in the transmission line condition monitoring sensor based on dielectric polarization;

[0027] Figure 4 Schematic diagram of charge transfer between inner and outer electrodes of a transmission line condition monitoring sensor based on dielectric polarization;

[0028] Figure 5 It is a schematic diagram of a simulation model of a transmission line condition monitoring sensor based on dielectric polarization;

[0029] Figure 6 It is a schematic diagram of the test platform of the transmission line condition monitoring sensor based on dielectric polarization;

[0030] Figure 7 It is a schematic diagram of the relationship between the output signal current value of the transmission line state monitoring sensor based on dielectric polarization and the state of the transmission line;

[0031] Figure 8 This is a design diagram of an intelligent monitoring system for preventing electric shock based on a dielectric polarization-based power transmission line condition monitoring sensor;

[0032] Fig. 9 It is a schematic diagram of the alarm system of the transmission line condition monitoring sensor based on dielectric polarization.

[0033] Among them, 101 is a sealing plug, 1021 is an inner electrode, 1022 is an outer electrode, 103 is a liquid dielectric, and 104 is a sensor housing. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. 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] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0038] The present invention is described in detail below in conjunction with specific embodiments. Specific embodiment one:

[0040] according to Figures 1 to 9As shown, the specific optimized technical solution adopted by the present invention to solve the above technical problems is: the present invention relates to a transmission line state monitoring sensor based on dielectric polarization.

[0041] A power transmission line state monitoring sensor based on dielectric polarization, the sensor comprising: a sealing plug 101, an electrode 102, a liquid dielectric 103 and a sensor housing 104, the sealing plug 101 and the sensor housing 104 are interference fit at both ends and fixed with waterproof glue;

[0042] The electrode 102 includes an inner electrode 1021 and an outer electrode 1022, wherein the inner electrode 1021 is completely placed in the liquid dielectric 103, and the outer electrode 1022 is installed on the outside of the sensor housing 104. There are two dielectrics, namely, a silicone hose and pure water, between the inner electrode 1021 and the outer electrode 1022. Under the action of an external electric field, the liquid dielectric 103 undergoes a dielectric polarization effect, and corresponding charges are induced on the inner electrode 1021 and the outer electrode 1022. The induced charges flow back and forth between the two interdigitated electrodes to generate an AC signal.

[0043] In order to realize real-time monitoring of the voltage of the power transmission line, the present invention adopts a scheme including a sealing plug; electrodes, including an inner electrode and an outer electrode, wherein the inner electrode is completely placed in a liquid dielectric and the outer electrode is installed on the outer side of the sensor housing; liquid dielectric; sensor housing, a silicone hose with high flexibility, stable performance and environmental friendliness is selected as the housing material of the sensor, and the outer electrode is fixed on the outer surface of the silicone hose to sense the induced charge generated by the polarization effect of the liquid dielectric. Then pure water is poured into the tube, and in this process, bubbles are avoided as much as possible in the tube to avoid affecting the accuracy of the sensor. After that, the inner electrode is inserted into the water, and the inner and outer electrodes are respectively connected by wires as a test interface. Finally, the sealing end cap is fixed to the other end of the hose, and sealing is achieved by a waterproof glue coating. Specific embodiment 2:

[0045] The difference between the second embodiment of the present application and the first embodiment is that:

[0046] The material of the liquid dielectric 103 is pure water, and the material of the sensor housing 104 is silica gel. Specific embodiment three:

[0048] The difference between the third embodiment of the present application and the second embodiment is that:

[0049] The electrode 102 is made of copper and is connected to a display device via an external wire to test and calibrate the sensor output signal. Specific embodiment four:

[0051] The difference between the fourth embodiment of the present application and the third embodiment is that:

[0052] The sealing plug 101 is made of silicone, which is the same material as the sensor housing 104 , and its size is selected according to the inner diameter of the sensor housing 104 . Specific embodiment five:

[0054] The difference between the fifth embodiment of the present invention and the fourth embodiment is that:

[0055] The sensor housing 104 is non-contact with the object to be measured, does not undergo mechanical movement, and is not affected by external direct contact forces. Specific embodiment six:

[0057] The difference between the sixth embodiment of the present invention and the fifth embodiment is that:

[0058] The liquid dielectric 103 produces a molecular polarization effect under the action of the AC electric field, and the dipole polarization direction changes continuously according to the AC frequency direction of the external electric field in which it is located, generating a changing dipole moment, and then a potential difference is generated between the two electrodes according to the principle of electrostatic induction. The two electrodes are connected by an external wire, and the sensor generates a current signal output, and the output signal frequency is the same as the frequency of the external electric field in which it is located. Specific embodiment seven:

[0060] The difference between the seventh embodiment of the present invention and the sixth embodiment is that:

[0061] The present invention provides an intelligent monitoring system for preventing electric shock. The system is based on a transmission line status monitoring sensor based on dielectric polarization. The system is characterized in that by real-time monitoring of the status of the power supply, abnormal conditions can be discovered in time and an alarm can be issued. When the system detects a risk of electric shock, an alarm will be issued immediately and the power supply will be cut off in combination with an automatic control circuit. Specific embodiment eight:

[0063] The difference between the eighth embodiment of the present invention and the seventh embodiment is that:

[0064] The present invention provides a test method for a transmission line state monitoring sensor based on dielectric polarization. The method is based on a transmission line state monitoring sensor based on dielectric polarization and comprises the following steps:

[0065] Step 1: Determine the charge transfer mechanism of liquid molecule polarization, use multi-physics field simulation software to simulate and analyze the sensor, and determine the influence of the alternating electric field size and dielectrics with different dielectric constants on the sensor output performance;

[0066] Step 2: Use an electrostatic collection device to record the AC signal generated by the sensor, and test the change of the sensor output signal when the state of the transmission line changes;

[0067] Step 3: Based on the characteristics of the sensor, combine it with household and industrial power transmission lines to achieve applications in power safety and smart grid. Specific embodiment nine:

[0069] The difference between the ninth embodiment of the present invention and the eighth embodiment is that:

[0070] The present invention provides a computer-readable storage medium on which a computer program is stored. The program is executed by a processor to implement a test method for a power transmission line state monitoring sensor based on dielectric polarization. Specific embodiment ten:

[0072] The difference between the tenth embodiment of the present invention and the ninth embodiment is that:

[0073] The present invention provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements a test method for a power transmission line state monitoring sensor based on dielectric polarization when executing the computer program. Specific embodiment eleven:

[0075] The difference between the eleventh embodiment of the present invention and the tenth embodiment is that:

[0076] like Figure 1 As shown, the dielectric polarization power transmission line condition monitoring sensor 10 includes: a sealing plug 101 , an electrode 102 , a liquid dielectric 103 and a sensor housing 104 .

[0077] The inner electrode 1021 is completely placed in the liquid dielectric 103, and the outer electrode 1022 is installed on the outside of the sensor housing 104. There are two dielectrics, a silicone hose and pure water, between the inner electrode 1021 and the outer electrode 1022. Under the action of the external electric field, the liquid dielectric 103 undergoes a dielectric polarization effect, and corresponding charges are induced on the inner electrode 1021 and the outer electrode 1022. The induced charges flow back and forth between the two interdigitated electrodes to generate an AC signal.

[0078] Liquid dielectric 103, water molecules are polar molecules. This is because water molecules contain two hydrogen atoms and one oxygen atom. The molecular configuration is a V-shaped structure. Two hydrogen atoms are connected to the bottom of the oxygen atom, and the bond angle is about 105°. Since the oxygen atom has a stronger ability to attract electrons, the electron cloud around the oxygen atom is denser, that is, the electron pair in the HO bond is biased towards O. Therefore, in the water molecule, the oxygen atom is negatively charged, while the hydrogen atom is positively charged. This distribution makes the water molecule present a polar structure, that is, it presents the characteristics of separation of positive and negative charges in space, which is called a dipole. The dipole will be oriented under the action of an external electric field, and it changes with the strength and direction of the external electric field. Therefore, macroscopically, due to the polarization of the molecule, the dielectric water has a certain electric dipole moment and exhibits some special physical and chemical properties.

[0079] like Figure 2 As shown, first, the outer electrode 1022 is fixed on the outer surface of the sensor housing 104 to sense the induced charge generated by the dielectric polarization effect of the liquid. Then, pure water is poured into the sensor housing 104. During this process, bubbles are avoided as much as possible in the tube to avoid affecting the accuracy of the sensor. Then, the inner electrode 1021 is inserted into the water, and the inner and outer electrodes are connected by wires as test interfaces. Finally, the sealing plug 101 is fixed to the other port of the sensor housing 104, and the sealing is achieved by a waterproof glue coating.

[0080] like Figure 3 As shown in the figure, in the initial stage, without the intervention of the external electric field, the dipoles in the liquid dielectric 103 are scattered and the liquid dielectric 103 as a whole does not show any electrical properties to the outside. When an AC electric field is applied, in the first stage, the direction of the electric field is from left to right, and the dipoles in the liquid dielectric 103 are regularly arranged along the direction of the electric field, and the liquid dielectric 103 as a whole shows electrical properties in the same direction as the electric field. As the electric field weakens from left to right, as shown in the figure, the liquid dielectric 103 is electrically conductive. Figure 3 In the second stage, the dipoles in the liquid dielectric 103 gradually change from an orderly regular arrangement to an irregular distribution. In this process, the overall electrical properties of the liquid dielectric 103 decrease, but the direction remains unchanged, until the electric field completely disappears, and the dipoles in the liquid dielectric 103 return to the same state as the initial stage, and the whole does not show electrical properties to the outside. Similarly, in the third stage, the direction of the external electric field changes. As the electric field increases, the dipoles gradually change from a scattered state to an orderly arrangement along the direction of the electric field. The electrical properties of the liquid dielectric 103 gradually increase and are in the same direction as the external electric field. In the fourth stage, as the external electric field decreases, the liquid dielectric 103 returns to the same state as the initial stage.

[0081] like Figure 4As shown, under the action of the external electric field, due to the molecular polarization phenomenon, the dipoles in the liquid dielectric 103 are regularly arranged, and the liquid dielectric 103 shows electrical properties to the outside. Based on the principle of electrostatic induction, the potential difference between the inner electrode 1021 and the outer electrode 1022 drives the electrons to move to form a current. Figure 4 (i) flows between the two electrodes in the direction shown, and a positive peak signal is output between the two electrodes. Then the AC electric field weakens, the molecular polarization effect weakens, and in order to balance the potential difference, the number of electrons moving between the two electrodes decreases, and a positive weakening electrical signal is output between the two electrodes, such as Figure 4 (ii). As the AC electric field continues to change until the electric field reverses, the dipole changes with the direction of the electric field, and the electrons move in opposite directions between the two electrodes, and a negative electrical signal is output between the two electrodes, such as Figure 4 (iii). Finally, the AC electric field is removed, the dipoles are redistributed, the molecular polarization phenomenon disappears, the water has no external electrical properties, there is naturally no electron transfer in the external circuit, and no electrical signal can be detected between the two poles, such as Figure 4 (iv) As described above, the liquid dielectric 103 has a continuously changing polarization direction in an AC electric field, and based on this phenomenon, a liquid dielectric polarization sensor is designed to output a continuously changing AC signal.

[0082] like Figure 5 As shown in the figure, the sensor is simulated and analyzed using multi-physics simulation software, and the three-dimensional space dimension is selected to simulate and analyze the sensor based on dielectric polarization. The current (ec) physical field is selected and the frequency domain 50Hz is added for research. An air domain with a length, width and height of 10cm is set to simulate the external electric field environment in which the sensor is located. Then, the basic model of the sensor is drawn in it. The simplified basic model consists of the following parts: an electrode with a length, width and height of 6cm and a height of 2mm (i.e., an electric field layer), a shell layer with a length, width and height of 6cm and a height of 1cm, and a liquid dielectric layer with a length, width and height of 6cm and a height of 4.8cm. The basic model of the sensor is located in the center of the air domain.

[0083] like Figure 6 As shown in the figure, a sensor characteristic test system for the transmission line condition monitoring sensor based on liquid dielectric polarization was built to test the difference in output performance of the sensor under different external factors and to calibrate the sensor under different voltage and current conditions. The AC power supply is connected to the laboratory transmission line, with an adjustable output voltage of 0-500V and a constant output frequency of 50Hz.

[0084] like Figure 7As shown in the figure, the output current of the sensor corresponding to the 0-500V voltage of the field source is displayed under the condition that the resistance of the external circuit of the test platform remains unchanged (three groups of resistors with different resistance values ​​were tested in the experiment, namely 100kΩ, 200kΩ and 500kΩ). According to the experimental data, it is concluded that the output current of the sensor increases with the increase of the field source voltage, and the output current of the sensor remains unchanged when the variable resistance of the external circuit is changed at the same voltage, which proves that the output current of the transmission line state monitoring sensor based on dielectric polarization is only related to the alternating voltage it senses, and has nothing to do with the alternating current it senses. It is worth noting that the electrical output of several commonly used voltage nodes is 11nA at an input voltage of 36V, 65nA at an input voltage of 220V, and 110nA at an input voltage of 380V. This test simulates the voltage fluctuation at both ends of the electrical appliances under the general household electricity consumption. The three groups of resistors with different resistance values ​​obtained the same experimental results at the same voltage, which proves that the sensing ability of the sensor will not change when the number of household appliances connected changes.

[0085] like Figure 8 As shown, based on the high sensitivity of the power transmission line status monitoring sensor designed by the present invention, a design scheme for an anti-electric shock intelligent monitoring system is proposed. This system can reduce the occurrence of electric shock to a certain extent. By monitoring the status of the power supply in real time, it can detect abnormal conditions in time and issue an alarm. When the system detects the risk of electric shock, it will immediately issue an alarm and cut off the power supply in combination with the automatic control circuit. This intelligent monitoring system can play an important role in both industry and home, improve the safety of electricity use, and protect personal safety. .

[0086] like Fig. 9 As shown, when the sensor is not in contact with a dangerous AC power source, the electrical output signal of the sensor is insufficient to trigger the alarm system. As the sensor approaches the power source, the output signal of the sensor increases and reaches the threshold set by the alarm system, triggering the alarm. When the sensor is away from the dangerous power source, the output of the sensor decreases and the alarm is lifted.

[0087] The transmission line state monitoring sensor based on dielectric polarization proposed in the embodiment of the present invention has the characteristics of miniaturization, convenience and fast response speed. It can monitor the electric field state of the transmission line in real time during operation, and provide a theoretical and experimental basis for the development of a new self-powered voltage monitoring sensor.

[0088] The above is only a preferred implementation of a transmission line state monitoring sensor based on dielectric polarization. The protection scope of a transmission line state monitoring sensor based on dielectric polarization is not limited to the above embodiments. All technical solutions under this idea belong to the protection scope of the present invention. It should be pointed out that for those skilled in the art, several improvements and changes without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A transmission line condition monitoring sensor based on dielectric polarization, characterized in that: The sensor comprises: a sealing plug, an electrode, a liquid dielectric and a sensor housing, wherein the sealing plug is interference-fitted with both ends of the sensor housing and fixed with waterproof glue; The electrode includes an inner electrode and an outer electrode, the inner electrode is completely placed in a liquid dielectric, the outer electrode is installed on the outside of the sensor housing, and there are two dielectrics, a silicone hose and pure water, between the inner electrode and the outer electrode. Under the action of an external electric field, the liquid dielectric undergoes a dielectric polarization effect, and corresponding charges are induced on the inner electrode and the outer electrode. The induced charges flow back and forth between the two interdigitated electrodes to generate an AC signal.

2. The sensor according to claim 1, characterized in that: The material of the liquid dielectric is pure water, and the material of the sensor housing is silica gel.

3. The sensor according to claim 2, characterized in that: The electrode is made of copper and is connected to a display device via an external wire to test and calibrate the sensor output signal.

4. The sensor according to claim 3, characterized in that: The sealing plug is made of silicone, which is the same material as the sensor housing, and its size is selected according to the inner diameter of the sensor housing.

5. The sensor according to claim 4, characterized in that: The sensor housing is non-contact with the measured object, does not undergo mechanical movement, and is not affected by external direct contact forces.

6. The sensor according to claim 5, characterized in that: The liquid dielectric produces a molecular polarization effect under the action of an alternating electric field, and the dipole polarization direction changes continuously according to the alternating frequency direction of the external electric field in which it is located, generating a changing dipole moment. Then, according to the principle of electrostatic induction, an electric potential difference is generated between the two electrodes. The two electrodes are connected by an external wire, and the sensor generates a current signal output, and the frequency of the output signal is the same as the frequency of the external electric field in which it is located.

7. An intelligent monitoring system for preventing electric shock, the system is based on the dielectric polarization-based power transmission line status monitoring sensor according to claim 1, characterized in that: By monitoring the status of the power supply in real time, abnormal situations can be discovered in time and alarms can be issued. When the system detects a risk of electric shock, it will immediately sound an alarm and cut off the power supply in conjunction with the automatic control circuit.

8. A method for testing a transmission line condition monitoring sensor based on dielectric polarization, the method being based on the transmission line condition monitoring sensor based on dielectric polarization according to claim 1, characterized in that: The following steps are involved: Step 1: Determine the charge transfer mechanism of liquid molecule polarization, use multi-physics field simulation software to simulate and analyze the sensor, and determine the influence of the alternating electric field size and dielectrics with different dielectric constants on the sensor output performance; Step 2: Use an electrostatic collection device to record the AC signal generated by the sensor, and test the change of the sensor output signal when the state of the transmission line changes; Step 3: Based on the characteristics of the sensor, combine it with household and industrial power transmission lines to achieve applications in power safety and smart grid.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the method according to claim 8.

10. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: The method of claim 8 is implemented when the processor executes the computer program.

Images