Voltage measurement sensor

Abstract

The utility model discloses a voltage measurement sensor which is used for measuring the voltage of an electric pressure plate so as to alleviate the problem that a circuit board in the sensor is directly and electrically connected with the pressure plate and is easy to burn out or mistakenly switch on a circuit. The sensor comprises a shell, a power connection plate, a circuit board and an alternating modulation assembly, wherein the power connection plate, the circuit board and the alternating modulation assembly are arranged in the shell. The shell is connected with the panel of the screen cabinet; the power connection plate is electrically connected with the power pressing plate; the circuit board is separated from the power connection plates and comprises metal induction pieces, and one metal induction piece is arranged opposite to one power connection plate; the alternating modulation assembly comprises an alternating modulation piece which is movably arranged between the metal induction piece and the power connection plate. When the power pressing plate has voltage, the power connection plate generates a direct-current electric field, and the alternating modulation piece is driven by the driving unit to periodically shield or expose the metal induction piece, so that alternating induction is formed between the power connection plate and the metal induction piece, and the voltage value on the pressing plate is measured. Therefore, the utility model has the advantages of improving the reliability and prolonging the service life.

Description

Technical Field

[0001] This application relates to the technical field of power equipment, and more specifically, to a voltage measurement sensor for measuring the voltage of a power pressure plate. Background Technology

[0002] A voltage measurement sensor is a device used to detect and measure voltage values ​​in a circuit, and it is widely used in various fields and scenarios. For example, in the field of power equipment, power switch plates are very important components in the protection circuit of substations. They are usually installed on the output circuit or protection function circuit of the substation protection system. Power switch plates are typically used for the opening and closing operations of power lines to achieve the purpose of protecting the substation protection system.

[0003] In related technologies, power supply plates are typically installed inside the panel of a cabinet. The wiring is complex, and both electrodes of the power supply plate need to be connected to protection circuits. Therefore, the power supply plate usually cannot measure the voltage on the protection circuits. Thus, a voltage measurement sensor needs to be added and connected around the power supply plate to achieve voltage measurement. However, most voltage measurement sensors simply connect the main control board of the sensor directly to the two electrodes of the power supply plate to detect voltage. Sensors with the main control board in direct contact with high voltage are prone to problems such as motherboard burnout leading to sensor damage, or motherboard short circuits causing incorrect power supply plate connection, posing a potential threat to the reliable use of related power equipment. Utility Model Content

[0004] The purpose of this application is to provide a voltage measurement sensor in which the circuit board for measuring voltage and the power supply board for electrically connected power plates are designed separately. This application can reduce the probability of damage or incorrect circuit connection of the voltage measurement sensor, improve the reliability of the voltage measurement sensor, and extend the service life of the voltage measurement sensor.

[0005] The embodiments of this application are implemented as follows:

[0006] In a first aspect, embodiments of this application provide a voltage measurement sensor for measuring the voltage of a power pressure plate. The sensor includes a housing, a junction plate, a circuit board, and an alternating modulation assembly. Both the voltage measurement sensor and the power pressure plate are installed in a cabinet. The housing is connected to the cabinet panel; the junction plate is located inside the housing and electrically connected to the power pressure plate; the circuit board is located inside the housing and separate from the junction plate, and includes a metal sensing element, with one metal sensing element and one junction plate positioned opposite each other; the alternating modulation assembly is located inside the housing and includes an alternating modulator, which is movably positioned between the metal sensing element and the junction plate. When there is voltage on the power pressure plate, the junction plate generates a DC electric field. The alternating modulator, driven by a drive unit, periodically blocks or exposes the metal sensing element, creating an alternating induction between the junction plate and the metal sensing element to measure the voltage value on the power pressure plate.

[0007] In the above technical solution, the grounding plate and the power pressure plate are electrically connected. A stable electric field is generated by the voltage signal collected from the power pressure plate. An alternating modulator moves between the separated grounding plate and the metal inductor, periodically blocking or exposing the metal inductor to change the electric field distribution. The potential on the metal inductor changes synchronously and regularly due to the electric field changes, forming alternating induction. The circuit board can then measure the voltage by detecting the potential change on the metal inductor. On one hand, the separation of the grounding plate and the metal inductor enables non-contact measurement by the voltage sensor, reducing the probability of circuit board burnout or short circuit, improving the reliability of the sensor, and extending its lifespan. On the other hand, the alternating modulator's movement periodically changes the electric field distribution to form the alternating induction voltage measurement principle, effectively improving the measurement accuracy, anti-interference capability, and application flexibility of the voltage sensor.

[0008] In some embodiments, the alternating modulator is rotatably disposed between the metal inductor and the grounding plate; wherein the alternating modulator can periodically block or expose the metal inductor by rotation. In the above technical solution, using a rotating alternating modulator to periodically change the electric field distribution is beneficial to the simplification and compactness of the overall structure of the voltage measurement sensor; in addition, the stability and repeatability of the rotational motion are good, which is beneficial to improving the accuracy of the measurement results and the adaptability of the sensor.

[0009] In some embodiments, the alternating modulator is configured to rotate about a rotation axis, and the metal sensing element includes a plurality of sensing units uniformly arranged around the rotation axis. The alternating modulator has a plurality of hollow areas uniformly arranged around the rotation axis, and a blocking area is formed between every two adjacent hollow areas. When the alternating modulator rotates, the hollow areas can completely expose the sensing units, and the blocking areas can completely block the sensing units.

[0010] In the above technical solution, the uniform arrangement of the sensing units and the cutout areas around the rotation axis ensures that each sensing unit is uniformly shielded and exposed during the rotation of the alternating modulation component, thereby improving the stability and regularity of the potential change on the metal sensing component and thus improving the stability and reliability of the sensor measurement. The design of multiple sensing units and multiple cutout areas allows the circuit board to acquire more data points per unit time, thereby improving the measurement accuracy. In addition, the uniform arrangement design is conducive to the simplification and compactness of the overall sensor structure, which can reduce the space occupied by the voltage measurement sensor.

[0011] In some embodiments, the number of sensing units and the number of cutout areas are both three. In the above technical solution, setting the number of sensing units and cutout areas to three makes the potential changes measured by the circuit board more stable and regular, which is beneficial to improving the detection accuracy of the voltage measurement sensor.

[0012] In some embodiments, both the sensing unit and the cutout area are arranged in a fan shape. In the above technical solution, the fan-shaped structure can make the most of the circular space and make the metal sensing element more evenly and stably exposed or blocked during the uniform rotation of the alternating modulation element. As a result, the potential change measured by the circuit board is more stable and regular, which is beneficial to improving the detection accuracy of the voltage measurement sensor.

[0013] In some embodiments, the alternating modulation assembly further includes a motor as a drive unit, the motor being mounted on a circuit board and connected to the alternating modulator to drive the alternating modulator to rotate at a uniform speed. In the above technical solution, the motor can provide more precise and stable speed control, thereby improving the accuracy and consistency of sensor measurements; the integration of the motor and circuit board makes the sensor structure more compact and simple, and facilitates flexible adjustment of the alternating modulator's speed, thereby improving the sensor's adaptability.

[0014] In some embodiments, the housing includes a main body and a mounting beam. The junction box, circuit board, and alternating modulation element are all disposed within the main body. The mounting beam is located on the first end face of the main body and forms a wire clearance space with the first end face. In the above technical solution, placing the junction box, circuit board, and alternating modulation element within the main body can protect these critical components from external environmental influences, thereby improving the reliability of the sensor and extending its service life. The wire clearance space design reduces the area occupied by the sensor on the mounting panel and increases the routing space for cables near the sensor, which is beneficial for optimizing wiring and simplifying the installation process of the voltage measurement sensor.

[0015] In some embodiments, a cable tie limiting block or a cable tie limiting groove is provided on the side wall of the mounting beam. In the above technical solution, the sensor can be fixed near the power pressure plate by binding the cable tie to the mounting beam and connecting it to the corresponding device. In this case, the cable tie limiting block and the cable tie limiting groove can reduce the probability of the cable tie moving along the extension direction of the mounting beam, thereby improving the stability and convenience of sensor installation.

[0016] In some embodiments, the housing further includes a guide rail snap-fit ​​assembly, which is connected to the mounting beam and located at the end of the mounting beam away from the main body. In the above technical solution, the guide rail snap-fit ​​assembly allows the voltage measurement sensor to be adapted to a mounting panel with a guide rail, facilitating position adjustment and fixation of the sensor on the mounting panel, and improving the sensor's connectivity and installation stability.

[0017] In some embodiments, the power plate has two electrode posts; two receiving plates are provided, and the circuit board includes two metal induction elements. One receiving plate is electrically connected to one electrode post, and one receiving plate is disposed opposite to one metal induction element. In the above technical solution, the independent arrangement of the two sets of alternating induction devices enables accurate measurement of the voltage at both ends of the power plate and facilitates subsequent maintenance. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of a voltage measurement sensor shown in some embodiments of this application;

[0020] Figure 2 This is an overall exploded view of a voltage measurement sensor shown in some embodiments of this application;

[0021] Figure 3 This is a schematic cross-sectional view of a voltage measurement sensor shown in some embodiments of this application;

[0022] Figure 4 This is a first-view schematic diagram of a voltage measurement system shown in some embodiments of this application;

[0023] Figure 5 This is a second-view schematic diagram of a voltage measurement system shown in some embodiments of this application;

[0024] Figure 6This is a schematic diagram of the overall structure of the circuit board shown in some embodiments of this application;

[0025] Figure 7 This is a schematic diagram of the overall structure of the alternating modulation component shown in some embodiments of this application;

[0026] Figure 8 This is a schematic diagram of the overall structure of the alternating modulation element shown in some embodiments of this application;

[0027] Figure 9 This is a first-view schematic diagram of the mounting base shown in some embodiments of this application;

[0028] Figure 10 This is a second-view schematic diagram of the mounting base shown in some embodiments of this application.

[0029] Icons: 1-Voltage measurement system; 2-Power pressure plate; 20-Electrode post; 3-Cabinet panel; 4-Voltage measurement sensor; 5-Housing; 50-Main body; 51-Mounting base; 510-First end face; 511-Circuit board receiving slot; 512-Connector board receiving slot; 513-Electrical connector receiving slot; 514-Adjustment hole; 515-Separator plate; 516-Connector board connection notch; 52-Top housing; 53-Mounting beam; 530-Wire clearance space ; 531-Cable tie limit block; 54-Guide rail snap-fit ​​assembly; 541-Guide rail adapter slider; 542-Guide rail snap-fit ​​piece; 55-Adhesive piece; 6-Alternating induction component; 61-Electrical board; 62-Metal induction component; 621-Induction unit; 63-Alternating modulation assembly; 631-Alternating modulation component; 6311-Clearing area; 6312-Shielding area; 632-Motor; 633-Motor mounting bracket; 64-Electrical connector; 7-Circuit board; 70-Circuit board body. Detailed Implementation

[0030] The terms “first,” “second,” “third,” etc., are used only for distinguishing descriptions and do not indicate a sequence number, nor should they be interpreted as indicating or implying relative importance.

[0031] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of this application, it should be noted that the terms "inner", "outer", "left", "right", "upper", "lower", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0033] In the description of this application, unless otherwise expressly specified and limited, the terms “set up,” “install,” “connect,” and “link” shall be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; as a mechanical connection or an electrical connection; as a direct connection or an indirect connection through an intermediate medium; or as a connection within two components.

[0034] The technical solution of this application will now be described in detail with reference to the accompanying drawings.

[0035] Please refer to Figures 1 to 3 , Figure 1 This is a schematic diagram of the overall structure of the voltage measurement sensor 4 shown in some embodiments of this application; Figure 2 This is an overall exploded view of the voltage measurement sensor 4 shown in some embodiments of this application; Figure 3 This is a schematic cross-sectional view of the voltage measurement sensor 4 shown in some embodiments of this application. Figures 1 to 5 As shown, this application provides a voltage measurement sensor 4 for measuring the voltage of a power pressure plate 2. Both the voltage measurement sensor 4 and the power pressure plate 2 are installed in a cabinet and connected to the cabinet panel 3. The voltage measurement sensor 4 includes a housing 5, a grounding plate 61, a circuit board 7, and an alternating modulation assembly 63.

[0036] Specifically, the housing 5 is connected to the cabinet panel 3 in the cabinet; the power receiving board 61 is located inside the housing 5 and is electrically connected to the power pressure plate 2; the circuit board 7 is located inside the housing 5 and is separate from the power receiving board 61; the circuit board 7 includes a metal sensing element 62, with one metal sensing element 62 and one power receiving board 61 arranged opposite to each other; the alternating modulation component 63 is located inside the housing 5, and the alternating modulation component 63 includes an alternating modulator 631, which is movably disposed between the metal sensing element 62 and the power receiving board 61; when there is voltage on the power pressure plate 2, the power receiving board 61 generates a DC electric field, and the alternating modulator 631 is driven by the drive unit to periodically block or expose the metal sensing element 62, so that an alternating induction is formed between the power receiving board 61 and the metal sensing element 62, so as to measure the voltage value on the power pressure plate 2.

[0037] In this embodiment, housing 5 refers to a container capable of housing the key components used by the sensor to measure voltage; grounding plate 61 refers to a device that is electrically connected to power plate 2, capable of conducting electricity to receive voltage signals from power plate 2, and forming a stable electric field; metal sensor 62 generally refers to a device capable of responding to changes in the electric field and converting the electric field changes into changes in its own potential or other electrical parameters; alternating modulation component 63 refers to a component capable of moving to change the electric field distribution between metal sensor 62 and grounding plate 61. Alternating modulation component 631 generally refers to a device capable of periodically moving between grounding plate 61 and metal sensor 62 to periodically change the electric field distribution by periodically blocking or exposing metal sensor 62; circuit board 7 generally includes circuit board body 70 and metal sensor 62. Circuit board body 70 refers to a device used to receive and process electrical signals collected from metal sensor 62 and complete voltage measurement; driving unit generally refers to a device capable of driving alternating modulation component 631, such as motor 632.

[0038] Furthermore, the grounding plate 61, the metal sensing element 62, and the alternating modulation element 631 can be made of conductive metal materials, and at least one set can be configured according to the actual application scenario and the object being measured.

[0039] Taking the circuit board 7 measuring voltage by acquiring the potential signal on the metal inductor 62 as an example, the working principle of the voltage measuring sensor 4 is as follows: the grounding plate 61 is directly electrically connected to the power plate 2, or electrically connected to the power plate 2 through an electrical connector 64 with conductive function, to receive the voltage signal from the power plate 2 and form a DC electric field; the metal inductor 62 is arranged opposite to and separated from the grounding plate 61, and there is a physical gap between the metal inductor 62 and the grounding plate 61. The metal inductor 62 has a potential under the action of the electric field; between the metal inductor 62 and the grounding plate 61, the periodically moving alternating modulator 631 can change the electric field distribution by periodically blocking or exposing the metal inductor 62, so that the originally stable electric field becomes an alternating electric field that changes periodically with time; the potential on the metal inductor 62 changes regularly in sync with the periodic change of the electric field, that is, alternating induction is formed, and the circuit board 7 can measure the voltage by detecting the potential change on the metal inductor 62.

[0040] In the above technical solution, the grounding plate 61 is separated from the metal sensing element 62, that is, the circuit board 7 is separated from the metal sensing element 62, which enables the voltage measurement sensor 4 to achieve non-contact measurement, reduces the probability of the circuit board 7 burning out or short-circuiting, improves the reliability of the sensor and extends the service life of the sensor; in addition, by moving the alternating modulator 631, the electric field distribution is periodically changed to form the alternating induction voltage measurement principle, which can effectively improve the measurement accuracy, anti-interference ability and application flexibility of the voltage measurement sensor 4.

[0041] Please see Figures 4 to 5 , Figure 4 This is a first-view schematic diagram of a voltage measurement system 1 shown in some embodiments of this application; Figure 5 This is a second-view schematic diagram of a voltage measurement system 1 shown in some embodiments of this application. Please refer to... Figures 1 to 5 As shown, in some embodiments, the voltage measurement system 1 provided in this application includes a voltage measurement sensor 4 and a cabinet panel 3. Both the voltage measurement sensor 4 and the power plate 2 are disposed on the cabinet panel 3. The voltage measurement system 1 can be used to measure the voltage of the power plate 2. The power plate 2 typically has two electrode posts 20. Correspondingly, the circuit board 7 also includes two metal induction elements 62 and a circuit board body 70, and two corresponding grounding plates 61 are also provided.

[0042] Specifically, two metal sensors 62 can be respectively disposed at both ends of the same side plate of the circuit board body 70; a power receiving plate 61 can be electrically connected to an electrode post 20 through an electrical connector 64, and the power receiving plate 61 and the metal sensor 62 are disposed opposite to each other, with a gap between the power receiving plate 61 and the metal sensor 62; two alternating modulators 631 can also be provided, and the alternating modulator 631 is movably disposed between the metal sensor 62 and the power receiving plate 61, and there can be gaps between the alternating modulator 631 and the metal sensor 62 and the power receiving plate 61.

[0043] Specifically, the voltage measurement sensor 4 may include two sets of alternating modulation components 63. Each set of alternating modulation components 63 includes a motor 632 as a drive unit, a motor mounting bracket 633, and an alternating modulator 631. The motor 632 is connected to the circuit board body 70 via the motor mounting bracket 633, and the motor 632 is connected to the alternating modulator 631 to drive the alternating modulator 631 to perform periodic motion. Further, a set of opposing ground plates 61, a metal sensing element 62, an alternating modulation component 63 with an alternating modulator 631 disposed therein, and an electrical connector 64 electrically connected to the ground plates 61 can form an alternating sensing element 6. Correspondingly, when the voltage measurement sensor 4 is used for voltage measurement of the power pressure plate 2, it may include two alternating sensing elements 6 and a set of circuit board bodies 70. The circuit board 7 can power the motor 632 and its own components via an energy storage component, such as a battery, or it can power the motor 632 and its own components via an external power supply cable.

[0044] like Figure 4 and Figure 5As shown, this application also provides a voltage measurement system 1, which may include a cabinet panel 3, multiple power pressure plates 2, and multiple voltage measurement sensors 4 provided in the embodiments of this application. Multiple power pressure plates 2 are disposed on the cabinet panel 3, and each power pressure plate 2 has two electrode posts 20. The housing 5 of the voltage measurement sensor 4 can be connected to the cabinet panel 3. Each voltage measurement sensor 4 is disposed on one side corresponding to a power pressure plate 2, and one end of each of the two electrical connectors 64 of each voltage measurement sensor 4 extends out of the housing 5 and is respectively connected to the two electrode posts 20 of the corresponding power pressure plate 2.

[0045] Furthermore, the voltage measurement system 1 may also include a data acquisition controller. The voltage measurement sensor 4 can communicate with the data acquisition controller via a communication module provided on the circuit board body 70, or the voltage measurement sensor 4 can also communicate with the data acquisition controller via a wired connection. The data acquisition controller can communicate with all the voltage measurement sensors 4 on the cabinet panel 3 to receive the voltage detection data of the power pressure plate 2 corresponding to each voltage measurement sensor 4.

[0046] In this embodiment, the power pressure plate 2 can be a continuous plate, a spring-loaded plate, or other remote-controlled power pressure plates 2 without voltage measurement function. The voltage measurement sensor 4 only needs to be connected to the corresponding power pressure plate 2 via the electrical connector 64 to measure the voltage of the power pressure plate 2, making it convenient and quick to use. In the above technical solution, the voltage measurement system 1 uses a non-contact voltage measurement sensor 4 to measure the voltage of the power pressure plate 2, which improves the application reliability of the voltage measurement system 1 and the reliability of the operation of the relay protection circuit in the substation, and reduces the probability of substation safety accidents caused by erroneous operation such as misoperation, missed operation, or partial operation of the power pressure plate 2 during inspection. On this basis, the voltage measurement sensor 4 sends voltage measurement information to the outside through a communication connection, which is conducive to realizing the intelligent operation of the substation's manual opening and closing power pressure plate 2. In addition, the independent setting of the two sets of alternating induction components 6 in the voltage measurement sensor 4 allows for accurate measurement of the voltage at both ends of the power pressure plate 2, and facilitates later maintenance.

[0047] In this embodiment, the alternating modulator 631 can periodically change the electric field distribution based on different motion forms and different structural types, thereby forming alternating induction. The following embodiments will describe the relevant embodiments of the alternating modulator 631.

[0048] In some embodiments, the alternating modulator 631 is rotatably disposed between the metal sensor 62 and the grounding plate 61; wherein, the alternating modulator 631 can rotate to periodically block or expose the metal sensor 62 facing the grounding plate 61. In other embodiments, the alternating modulator 631 is movably disposed between the metal sensor 62 and the grounding plate, and the distance between the alternating modulator 631 and the grounding plate and the metal sensor 62 is constant; wherein, the alternating modulator 631 can reciprocate to periodically block or expose the metal sensor 62 facing the grounding plate.

[0049] In the above technical solution, the use of a rotating alternating modulator 631 to periodically change the electric field distribution is beneficial to the simplification and compactness of the overall structure of the voltage measurement sensor 4. The rotating mechanism is relatively simple, easy to manufacture and maintain, and has fewer parts, resulting in a lower failure rate and lower maintenance costs. In addition, the rotational motion has good continuity, stability, and repeatability, which can improve the consistency of each cycle measurement. The rotational speed and other motion parameters of the rotating modulator can also be adjusted according to different measurement requirements to adapt to different application scenarios and measurement objects, which is beneficial to improving the accuracy of measurement results and the adaptability of the sensor. Furthermore, the mechanical noise generated by the rotational motion is usually low.

[0050] Please see Figures 6 to 8 , Figure 6 This is a schematic diagram of the overall structure of the circuit board 7 shown in some embodiments of this application; Figure 7 This is a schematic diagram of the overall structure of the alternating modulation component 63 shown in some embodiments of this application; Figure 8 This is a schematic diagram of the overall structure of the alternating modulation element 631 shown in some embodiments of this application. Please refer to... Figures 1 to 3 , Figures 6 to 8 As shown, in some embodiments, the voltage measurement sensor 4 may include two alternating modulation components 63, each alternating modulation component 63 including a motor 632, a motor mounting bracket 633 and an alternating modulator 631.

[0051] The motor 632 is connected to the connecting shaft hole of the alternating modulator 631 through the motor output shaft. The motor 632 is used to drive the alternating modulator 631 to rotate at a constant speed around the rotation axis. The rotation axis is the straight line where the central axis of the motor output shaft and the central axis of the connecting shaft hole of the alternating modulator 631 are located after the alternating modulator assembly 63 is installed. The motor 632 is installed between two plates of the circuit board body 70 through the motor mounting bracket 633. The motor output shaft extends through the mounting through hole on one side plate and is connected to the alternating modulator 631.

[0052] In the above technical solution, the motor 632 used to drive the rotation can provide more precise and stable speed control, thereby improving the accuracy and consistency of sensor measurement; the motor 632 and the circuit board body 70 are integrated together, making the sensor structure more compact and simple, and facilitating flexible adjustment of the rotation speed of the alternating modulator 631, thereby improving the adaptability of the sensor.

[0053] In some embodiments, the alternating modulator 631 is configured to rotate about a rotation axis, and the metal sensor 62 includes a plurality of sensing units 621 evenly distributed around the rotation axis. The alternating modulator 631 has a plurality of hollow areas 6311 evenly distributed around the rotation axis, and a blocking area 6312 is formed between every two adjacent hollow areas 6311. When the alternating modulator 631 rotates, the hollow areas 6311 can completely expose the sensing units 621, and the blocking areas 6312 can completely block the sensing units 621.

[0054] Specifically, the motor 632, which drives the alternating modulator 631 to rotate, is installed between two boards of the circuit board body 70. The motor output shaft extends through the mounting through hole on one side of the board and then connects to the connecting shaft hole of the alternating modulator 631. The rotation axis is the straight line where the central axis of the motor output shaft, the central axis of the mounting through hole on the board, and the central axis of the connecting shaft hole on the alternating modulator 631 for connecting to the motor output shaft are located after the alternating modulator 63 is installed on the circuit board body 70. Correspondingly, since the metal sensing element 62 is periodically exposed to the grounding plate 61 through the cutout area 6311 and periodically blocked through the blocking area 6312, the multiple cutout areas 6311 and multiple blocking areas 6312 on the alternating modulation element 631 are usually arranged in a uniformly spaced manner around the rotation axis. That is, there is a blocking area 6312 between every two adjacent cutout areas 6311 and a cutout area 6311 between every two adjacent blocking areas 6312. The sensing units 621 on the circuit board body 70 are also arranged in a uniformly spaced manner around the rotation axis (mounting through holes on the board body) in accordance with the arrangement of the cutout areas 6311 and the blocking areas 6312.

[0055] In the above technical solution, the uniform arrangement of multiple sensing units 621, hollow areas 6311, and shielding areas 6312 around the rotation axis ensures that each sensing unit 621 is uniformly shielded and exposed during the rotation of the alternating modulator 631. The rotational motion of the alternating modulator 631 is periodic, and the alternating appearance of the hollow areas 6311 and shielding areas 6312 forms a stable periodic modulation. This periodic modulation and uniform distribution design can form stable alternating induction, thereby improving the stability and regularity of potential changes on the metal sensing element 62 and reducing [potential stress]. To mitigate measurement errors caused by uneven distribution, the uniformity and consistency of measurements are improved, thereby enhancing the accuracy, stability, and reliability of the sensor. The design of multiple sensing units 621 and multiple cutout areas 6311 allows the circuit board 7 to acquire more measurement data points per unit time, thus improving measurement accuracy and resolution. Furthermore, the uniform arrangement of the sensing units 621 and cutout areas 6311 around the rotation axis facilitates the simplification and compactness of the overall sensor structure, reducing the space occupied by the voltage measurement sensor 4 and making it easier to integrate into various devices. Through the coordinated operation of multiple sensing units 621 and cutout areas 6311, the voltage measurement sensor 4 can respond quickly to minute changes in the electric field, improving measurement sensitivity. Moreover, by customizing the rotation speed of the alternating modulator 631 and the number and size of the sensing units 621, cutout areas 6311, and shielding areas 6312, the voltage measurement sensor 4 can flexibly adapt to different measurement needs and various application scenarios, giving it wide applicability.

[0056] In some preferred embodiments, the number of sensing units 621 and the number of cutout areas 6311 are both three; in some preferred embodiments, both sensing units 621 and cutout areas 6311 are arranged in a fan shape. Furthermore, the shape and size of sensing units 621 and cutout areas 6311 can be exactly the same, and the central angle of both can be set to 60 degrees. In this embodiment, during rotation, the alternating modulator 631 facing the grounding plate 61 usually needs to completely block or completely expose the sensing units 621. Therefore, when the shape and size of sensing units 621 and cutout areas 6311 are exactly the same and there are three of each, the central angle of the cutout area 6311 should be set to 60 degrees. Thus, the central angle of the blocking area 6312 is also 60 degrees, and the shape and size of the blocking area 6312 can also completely block the sensing units 621. In other alternative embodiments, the size of the sensing unit 621 may be set to be slightly smaller than the cutout area 6311 and the blocking area 6312, or the number of sensing units 621, cutout area 6311 and blocking area 6312 may be set to other numbers, or the central angle of sensing units 621, cutout area 6311 and blocking area 6312 may be set to other angles.

[0057] In the above technical solution, the number of sensing units 621 and hollow areas 6311 are both set to three. The potential change measured by the circuit board 7 is more stable and regular, which is conducive to improving the detection accuracy of the voltage measurement sensor 4. The fan-shaped structure can make the most of the circular space, and make the metal sensing element 62 gradually exposed or gradually blocked towards the ground plate 61 more evenly and stably during the uniform rotation of the alternating modulation element 631. As a result, the potential change measured by the circuit board 7 is more stable and regular, which is also conducive to improving the detection accuracy of the voltage measurement sensor 4.

[0058] Please see Figures 9 to 10 , Figure 9 This is a first-view schematic diagram of the mounting base 51 shown in some embodiments of this application; Figure 10 This is a second-view schematic diagram of the mounting base 51 shown in some embodiments of this application. Please refer to... Figures 1 to 5 , Figures 9 to 10 As shown, in some embodiments, the housing 5 includes a main body 50 and a mounting beam 53. The junction board 61, circuit board 7, and alternating modulator 631 are all disposed within the main body 50. The main body 50 includes a mounting base 51 and a top housing 52. The top housing 52 and the mounting base 51 are fastened together and secured by bolts or other fasteners to enclose an internal cavity for accommodating the junction board 61, circuit board 7, and alternating modulator 631. The side surface of the mounting base 51 away from the top housing 52 is a first end face 510. The mounting beam 53 is disposed on the first end face 510 of the mounting base 51 (main body 50) and forms a wire clearance 530 with the first end face 510.

[0059] In related technologies, voltage measurement sensors 4 need to be pre-installed on the panel 3 of the control cabinet and electrically connected to the electrode posts 20 of the power pressure plate 2 during the initial construction of a substation. For retrofitted substations, due to the numerous lines on the panel 3 where the power pressure plate 2 is located, the installation space and area for installing additional voltage measurement sensors 4 are insufficient. To add voltage measurement functionality, it is usually necessary to completely remove and reinstall the original power pressure plate 2 and the original lines, which is difficult and complex to construct and wastes manpower and resources. The voltage measurement sensor 4 provided in this application embodiment has an additional mounting beam 53 at the end of the mounting base 51 used to connect to the control cabinet panel 3, which can alleviate the problem of excessive and complex lines on the control cabinet panel 3, making it difficult to install the sensor.

[0060] Specifically, the mounting beam 53 is located in the center of the first end face 510 and extends vertically away from the mounting base 51, forming two cable clearance spaces 530 with the first end face 510. That is, the housing 5 leaves two cable clearance spaces 530 on the side of the mounting base 51 with the first end face 510 for connecting cables to pass through, facilitating the routing of existing power pressure plates 2; the end of the mounting beam 53 away from the mounting base 51 can be used to connect the cabinet panel 3.

[0061] In the above technical solution, placing the junction box 61, circuit board 7, and alternating modulation component 631 inside the main body 50 can protect these key components from the influence of the external environment, thereby improving the reliability of the sensor and extending its service life. The design of the wire gap 530 reduces the area occupied by the voltage measurement sensor 4 on the mounting panel (cabinet panel 3) and increases the routing space for cables near the voltage measurement sensor 4, which is beneficial for optimizing wiring and reducing cable position changes, simplifying the installation process of the voltage measurement sensor 4. In addition, the design of the wire gap 530 allows the cable to be laid out smoothly without excessive bending and turning, reducing the probability of the cable being squeezed or damaged, and improving the reliability of the voltage measurement system 1.

[0062] In this embodiment, the housing 5 of the voltage measurement sensor 4 can be fixed to the mounting panel in different connection forms by the mounting beam 53. The mounting beam 53 can be pasted to the mounting panel by the adhesive 55, such as double-sided tape. The mounting beam 53 can be connected to the guide rail on the mounting panel by the guide rail snap-fit ​​assembly 54. The mounting beam 53 can also be fixed to the crossbeam on the mounting panel by the cable tie. The following embodiments will further describe the relevant embodiments of the housing 5.

[0063] In some embodiments, the end of the mounting beam 53 away from the mounting base 51 is a mounting surface. The mounting surface can be attached to the mounting panel using adhesive or bonding agent 55 to fix the housing 5 and the voltage measuring sensor 4 to the mounting panel (such as the cabinet panel 3). In the above technical solution, the bonding agent 55 bonds the housing 5 to the mounting panel, allowing the voltage measuring sensor 4 to be stably mounted on the mounting panel, reducing the pulling force of the voltage measuring sensor 4 on the power pressure plate 2 due to its own weight, and improving the stability of the connection.

[0064] In some embodiments, the side wall of the mounting beam 53 is provided with a cable tie limiting block 531 or a cable tie limiting groove. Specifically, for the power pressure plate 2 with a sensor fixing shaft, or for the mounting panel with a sensor fixing crossbeam, the voltage measuring sensor 4 can be installed and fixed near the power pressure plate by passing a cable tie through the gap in the middle of the mounting beam 53 and binding the mounting beam 53 tightly to the fixing shaft or fixing crossbeam. In the above technical solution, the setting of the cable tie limiting block 531 and the cable tie limiting groove can reduce the probability of the cable tie moving along the extension direction of the mounting beam 53, and improve the stability, simplicity and fixing efficiency of the installation and binding of the voltage measuring sensor 4. In addition, the cable tie limiting block 531 or the cable tie limiting groove can not only be used to fix the mounting beam 53, but also to assist in fixing or organizing some cables, thereby making the cable layout neater and more orderly.

[0065] like Figures 2 to 3 As shown, in some embodiments, the housing 5 may further include a guide rail snap-fit ​​assembly 54, which is connected to the mounting beam 53 and is located at the end of the mounting beam 53 away from the main body 50. Specifically, the end of the mounting beam 53 away from the mounting base 51 is the mounting surface, and the guide rail snap-fit ​​assembly 54 can be attached to the mounting surface by an adhesive 55; the mounting surface may also be provided with connection holes, and the guide rail snap-fit ​​assembly 54 can also be fixed to the mounting surface by fasteners such as bolts engaging with the connection holes.

[0066] Furthermore, the guide rail snap-fit ​​assembly 54 may include a guide rail adapter slider 541 and a guide rail snap-fit ​​member 542. The two ends of the guide rail adapter slider 541 are bent away from the mounting surface to form slots for adapting the guide rail and for accommodating the guide rail snap-fit ​​member 542. When the guide rail on the mounting panel is engaged with the guide rail adapter slider 541, the guide rail snap-fit ​​member 542 may, based on its own elasticity, press the guide rail against the guide rail adapter slider 541 or leave a gap between the guide rail and the guide rail adapter slider 541 that allows for relative movement, so as to achieve the fixation and adjustment of the position of the voltage measuring sensor 4.

[0067] In the above technical solution, the guide rail snap-fit ​​assembly 54 enables the voltage measurement sensor 4 to be adapted to the mounting panel with the guide rail, facilitating the adjustment and fixation of the sensor's position on the mounting panel and improving the sensor's connectivity and installation stability. The design of the guide rail snap-fit ​​assembly 54 allows the mounting beam 53 and the voltage measurement sensor 4 to be quickly and easily installed on various guide rails, simplifying the installation process and facilitating disassembly and maintenance. Through the cooperation between the guide rail snap-fit ​​assembly 54 and the guide rail, the voltage measurement system 1 can efficiently and quickly add or remove the voltage measurement sensor 4 on the guide rail to meet different needs.

[0068] In this embodiment, the various connection methods between the mounting beam 53 and the mounting panel can adapt to various installation conditions and usage scenarios, improving the applicability of the voltage measurement sensor 4. Furthermore, in this embodiment, the addition or installation of the voltage measurement sensor 4 usually does not require the removal of the existing power pressure plate 2 and too many connecting cables, making installation convenient and reducing construction and maintenance costs.

[0069] like Figure 7 , Figure 8 As shown, the internal cavity of the main body 50 includes a circuit board accommodating space 511, a power board accommodating slot 512, and an electrical connector accommodating space 513. The circuit board accommodating space 511 accommodates the circuit board body 70 and the alternating modulation assembly 63; the power board accommodating slot 512 accommodates the power board 61; and the electrical connector accommodating space 513 accommodates and fixes the electrical connector 64. The circuit board accommodating space 511 and the electrical connector accommodating space 513 are respectively located on both sides of the power board accommodating slot 512, and the electrical connector accommodating space 513 and the power board accommodating slot 512 can be separated by a partition plate 515. The top of the partition plate 515 is provided with a power board connection notch 516, so that one end of the power supply connector 64 extends into it and is electrically connected to the power board 61; the mounting base 51 is also provided with an adjustment hole 514, so that the other end of the power supply connector 64 passes through and extends out of the main body 50, and can swing adaptively under the guidance of the adjustment hole 514.

[0070] In some embodiments, the voltage measurement sensor 4 further includes an electrical connector 64, which can be configured as a contact spring. One end of each contact spring is connected to a corresponding contact plate 61, and the other end of each contact spring is used to connect to the electrode post 20 corresponding to the device under test (e.g., the power plate 2). In the above technical solution, the elasticity of the contact spring itself is beneficial for clamping the electrode post 20 of the power plate 2. By respectively attaching one end of each of the two contact springs to the two electrode posts 20 of the power plate 2, the voltage measurement sensor 4 can transmit the voltage signal collected by the contact springs to the contact plate 61. When there is voltage across the power plate 2, the contact plate 61 generates a DC electric field. The motor 632 drives the alternating modulator 631 to rotate to form alternating induction, thereby measuring the voltage across the power plate 2 by the change in the potential (i.e., the potential difference to ground) on the metal induction element 62.

[0071] Furthermore, the connecting spring can be configured as a torsion spring structure, so that the end of the connecting spring used to connect to the power plate 2 can rotate around the central axis of the connecting spring, thereby adapting to various power plates 2 with different center distances between the two electrode posts 20. For example... Figure 1 and Figure 4As shown, the two electrical connectors 64 are used to connect one end of the electrode post 20. They can make elastic movements that move closer or further apart based on the torsion spring structure, so that the voltage measuring sensor 4 can be used with power plates 2 with different electrode post spacing, improving the versatility of the voltage measuring sensor 4, and at the same time facilitating the connection and installation of the electrical connectors 64 and the electrode post 20.

[0072] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A voltage measuring sensor (4) for measuring the voltage of a power panel (2), said voltage measuring sensor (4) and said power panel (2) are both installed in a screen cabinet; characterized in that, The voltage measurement sensor (4) comprises: a housing (5) connected with a panel (3) in the screen cabinet; an electricity receiving plate (61) arranged in the housing (5) and electrically connected with the power press plate (2); a circuit board (7) arranged in the housing (5) and separated from the electricity receiving plate (61); the circuit board (7) comprises a metal induction piece (62), and one metal induction piece (62) is arranged opposite to one electricity receiving plate (61); an alternating modulation assembly (63) arranged in the housing (5), the alternating modulation assembly (63) comprises an alternating modulation piece (631), and the alternating modulation piece (631) is movably arranged between the metal induction piece (62) and the electricity receiving plate (61); When there is voltage on the power press plate (2), the electricity receiving plate (61) generates a direct current electric field, the alternating modulation piece (631) is driven by a driving unit, and the metal induction piece (62) is periodically shielded or exposed, so that an alternating induction is formed between the electricity receiving plate (61) and the metal induction piece (62), and the voltage value on the power press plate (2) is measured.

2. The voltage measurement sensor (4) according to claim 1, characterized in that The alternating modulation piece (631) is rotatably arranged between the metal induction piece (62) and the electricity receiving plate (61); wherein the alternating modulation piece (631) can periodically shield or expose the metal induction piece (62) by rotation.

3. The voltage measurement sensor (4) according to claim 2, characterized in that The alternating modulation piece (631) is configured to rotate around a rotation axis, the metal induction piece (62) comprises a plurality of induction units (621) uniformly arranged around the rotation axis, and the alternating modulation piece (631) has a plurality of hollow areas uniformly arranged around the rotation axis, and each two adjacent hollow areas are a shielding area. When the alternating modulation piece (631) rotates, the hollow area can completely expose the induction unit (621), and the shielding area can completely shield the induction unit (621).

4. The voltage measurement sensor (4) according to claim 3, characterized in that The number of the induction units (621) and the hollow areas is three.

5. The voltage measurement sensor (4) according to claim 3, characterized in that The induction units (621) and the hollow areas are arranged in a fan shape.

6. The voltage measurement sensor (4) according to claim 2, characterized in that The alternating modulation assembly (63) further comprises a motor (632) as the driving unit, the motor (632) is arranged on the circuit board (7), and the motor (632) is connected with the alternating modulation piece (631) to drive the alternating modulation piece (631) to rotate at a constant speed.

7. The voltage measurement sensor (4) according to claim 1, characterized in that The housing (5) comprises a main body portion (50) and a mounting beam (53), the electricity receiving plate (61), the circuit board (7) and the alternating modulation piece (631) are arranged in the main body portion (50), and the mounting beam (53) is arranged at a first end face (510) of the main body portion (50) and forms a wire space (530) with the first end face (510).

8. The voltage measurement sensor (4) according to claim 7, characterized in that A cable tie limiting block (531) or a cable tie limiting groove is arranged on the side wall of the mounting beam (53).

9. The voltage measurement sensor (4) according to claim 7, characterized in that The shell (5) further comprises a guide rail clamping assembly (54) connected with the mounting beam (53) and arranged at an end of the mounting beam (53) away from the main body (50).

10. The voltage measurement sensor (4) according to any one of claims 1-9, characterized in that, The power clamp (2) has two electrode columns (20); The power receiving plate (61) is provided with two, the circuit board (7) comprises two metal induction pieces (62), one power receiving plate (61) is electrically connected with one electrode column (20), and one power receiving plate (61) is arranged opposite to one metal induction piece (62).

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