阅读说明：本技术 分压传感器 (Partial pressure sensor ) 是由 唐峰 吕启深 鲜成 张嘉乐 李默林 冷雨 杨震洋 于 2020-06-05 设计创作，主要内容包括：本申请涉及一种分压传感器,包括：金属感应件、金属壳体、第一屏蔽电极、第二屏蔽电极、电容组件和连接线。所述第一屏蔽电极与所述第二屏蔽电极相对设置,所述电容组件设置于所述金属壳体内,所述电容组件分别与所述金属感应件和所述电容组件电连接。在使用时,只需要将所述金属感应件靠近所述待测导体即可,整个过程中无需将所述分压传感器与所述待测导体直接接触或者通过导线等其他电子器件等连接,对使用条件和使用环境无特殊要求,可应用于开放环境中对电压进行检测。本申请所述分压传感器解决了目前分压传感器无法在开放环境中使用的技术问题,达到了提高所述分压传感器工作性能的技术效果。(The application relates to a partial pressure sensor, including: the metal induction piece, metal casing, first shielding electrode, second shielding electrode, electric capacity subassembly and connecting wire. The first shielding electrode and the second shielding electrode are oppositely arranged, the capacitor assembly is arranged in the metal shell, and the capacitor assembly is respectively electrically connected with the metal induction part and the capacitor assembly. When using, only need with the metal response piece is close to the conductor that awaits measuring can, whole in-process need not will partial pressure sensor with the conductor direct contact that awaits measuring or through other electron device such as wires and connect, do not have special requirement to service condition and service environment, can be applied to and detect voltage in the open environment. The partial pressure sensor solves the technical problem that the existing partial pressure sensor cannot be used in an open environment, and achieves the technical effect of improving the working performance of the partial pressure sensor.)

1. A partial pressure sensor, comprising:

the metal shell (100) is internally provided with a containing cavity (110), and the metal shell (100) is grounded;

a metal inductor (200) disposed outside the metal case (100);

a first shielding electrode (310) disposed on a surface of the metal case (100);

a second shielding electrode (320) disposed on a surface of the metal case (100) and opposite to the first shielding electrode (310);

a capacitor assembly (400) disposed between the first shielding electrode (310) and the second shielding electrode (320), located in the accommodating cavity (110), and electrically connected to the metal inductor (200);

one end of the connecting wire (500) is electrically connected with the capacitor assembly (400), and the other end of the connecting wire (500) penetrates through the metal shell (100) and is located outside the metal shell (100).

2. The partial pressure sensor according to claim 1, further comprising:

a rectifier (610) disposed on an outer surface of the metal case (100).

3. The partial pressure sensor according to claim 2, further comprising:

the voltage follower (620) is arranged on the outer surface of the metal shell (100), the input end of the voltage follower (620) is electrically connected with the rectifier (610), and the output end of the voltage follower (620) is electrically connected with the first shielding electrode (310) and the second shielding electrode (320) respectively.

4. A partial pressure sensor according to claim 3, further comprising:

the signal amplifier (630) is arranged on the outer surface of the metal shell (100), the input end of the signal amplifier (630) is electrically connected with the capacitor assembly (400), and the output end of the signal amplifier (630) is electrically connected with the connecting wire (500).

5. The partial pressure sensor according to claim 4, further comprising:

the inverter (640) is arranged on the outer surface of the metal shell (100), the input end of the inverter (640) is electrically connected with the output end of the signal amplifier (630), and the output end of the inverter (640) is electrically connected with the connecting wire (500).

6. The partial pressure sensor according to claim 5, further comprising:

and the object placing cavity (650) is arranged on the outer surface of the metal shell (100), and the rectifier (610), the voltage follower (620), the signal amplifier (630) and the inverter (640) are arranged in the object placing cavity (650).

7. A partial pressure sensor according to claim 1, wherein the capacitive component (400) comprises a plurality of capacitors connected in parallel.

8. A partial pressure sensor according to claim 7, characterized in that the metal housing (100) is a cylindrical structure; the first shielding electrode (310) and the second shielding electrode (320) are respectively arranged on the upper bottom surface and the lower bottom surface of the metal shell (100).

9. A partial pressure sensor according to claim 8, wherein the plurality of capacitors are arranged around the receiving cavity (110) at equal intervals; the central point of the first shielding electrode (310), the central point of the second shielding electrode (320), the central axis of the metal shell (100) and the arrangement central axes of the plurality of capacitors are all located on the same straight line.

10. A partial pressure sensor according to claim 1, characterised in that the metal sensing member (200) is a sensing metal plate.

Technical Field

The present application relates to the field of electronic circuit technology, and more particularly, to a partial pressure sensor.

Background

The voltage sensor is a device which can convert the measured parameter into direct current and direct voltage and can isolate and output an analog signal or a digital signal. The voltage sensor is used for measuring voltage or current signals with serious waveform distortion in a power grid, and can also measure non-sinusoidal waveforms such as square waves, triangular waves and the like. For example, the most common voltage sensor used today is the hall voltage sensor, which is a type of voltage sensor made using the hall effect. The Hall voltage sensor limits the current formed by the primary side voltage within 10mA through an external resistor or an internal resistor to form primary side current, the primary side current generates an electromagnetic field through a multi-turn winding, and the electromagnetic field is detected by a Hall element in an air gap and induces corresponding electromotive force. The electromotive force is adjusted by a circuit or the like to generate an electromagnetic field having the same magnitude and the opposite direction to the magnetic flux generated by the primary current, thereby keeping the magnetic flux at zero in the magnetic core. Most of the current voltage sensors comprise a voltage division sensor and an electromagnetic oscillation circuit, the requirement of the voltage division sensor on an electric field in an application environment is high in the using process, the voltage division sensor is generally used in a closed electric appliance or an electric environment, and the voltage division sensor cannot be used in an open environment.

Disclosure of Invention

In view of this, it is necessary to provide a partial pressure sensor that addresses the problem that conventional partial pressure sensors cannot be used in an open environment.

A partial pressure sensor, comprising:

the metal shell is internally provided with a containing cavity and is grounded;

the metal induction piece is arranged outside the metal shell;

the first shielding electrode is arranged on the surface of the metal shell;

the second shielding electrode is arranged on the surface of the metal shell and is opposite to the first shielding electrode;

the capacitor assembly is arranged between the first shielding electrode and the second shielding electrode, is positioned in the accommodating cavity and is electrically connected with the metal induction piece;

and one end of the connecting wire is electrically connected with the capacitor assembly, and the other end of the connecting wire penetrates through the metal shell and is positioned outside the metal shell.

In one embodiment, the method further comprises the following steps:

and the rectifier is arranged on the outer surface of the metal shell.

In one embodiment, the method further comprises the following steps:

the voltage follower is arranged on the outer surface of the metal shell, the input end of the voltage follower is electrically connected with the rectifier, and the output end of the voltage follower is electrically connected with the first shielding electrode and the second shielding electrode respectively.

In one embodiment, the method further comprises the following steps:

the signal amplifier is arranged on the outer surface of the metal shell, the input end of the signal amplifier is electrically connected with the capacitor assembly, and the output end of the signal amplifier is electrically connected with the connecting wire.

In one embodiment, the method further comprises the following steps:

the inverter is arranged on the outer surface of the metal shell, the input end of the inverter is electrically connected with the output end of the signal amplifier, and the output end of the inverter is electrically connected with the connecting wire.

In one embodiment, the method further comprises the following steps:

and the object placing cavity is arranged on the outer surface of the metal shell, and the rectifier, the voltage follower, the signal amplifier and the inverter are arranged in the object placing cavity.

In one embodiment, the capacitive assembly comprises a plurality of capacitors connected in parallel.

In one embodiment, the metal shell is a cylindrical structure; the first shielding electrode and the second shielding electrode are respectively arranged on the upper bottom surface and the lower bottom surface of the metal shell.

In one embodiment, the plurality of capacitors are annularly arranged in the accommodating cavity at equal intervals; the central point of the first shielding electrode, the central point of the second shielding electrode, the central axis of the metal shell and the arrangement central axes of the capacitors are all located on the same straight line.

In one embodiment, the metal inductor is an induction metal plate.

The embodiment of the application provides a partial pressure sensor, includes: the metal induction piece, metal casing, first shielding electrode, second shielding electrode, electric capacity subassembly and connecting wire. The first shielding electrode and the second shielding electrode are oppositely arranged, the capacitor assembly is arranged in the metal shell, and the capacitor assembly is respectively electrically connected with the metal induction part and the capacitor assembly. When using, only need with the metal response piece is close to the conductor that awaits measuring can, whole in-process need not will partial pressure sensor with the conductor direct contact that awaits measuring or through other electron device such as wires and connect, do not have special requirement to service condition and service environment, can be applied to and detect voltage in the open environment. The partial pressure sensor solves the technical problem that the existing partial pressure sensor cannot be used in an open environment, and achieves the technical effect of improving the working performance of the partial pressure sensor.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a partial pressure sensor according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a partial pressure sensor according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a partial pressure sensor according to an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of a partial pressure sensor according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a partial pressure sensor according to an embodiment of the present application.

Description of reference numerals:

10. a partial pressure sensor;

100. a metal housing;

110. a receiving cavity;

200. a metal sensing member;

310. a first shield electrode;

320. a second shield electrode;

400. a capacitive component;

500. a connecting wire;

610. a rectifier;

620. a voltage follower;

630. a signal amplifier;

640. an inverter;

650. a storage cavity;

20. a conductor to be tested;

21. and fitting the capacitance.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, a partial pressure sensor of the present application is described in further detail below by way of embodiments and with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be considered as limiting the present application.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

The embodiment of the application provides a partial pressure sensor 10, which can be applied to any environment needing voltage detection, a closed environment and an open environment.

Referring to fig. 1, an embodiment of the present application provides a partial pressure sensor 10 including: metal shell 100, metal inductor 200, first shielding electrode 310, second shielding electrode 320, capacitor assembly 400 and connecting wires 500.

The metal shell 100 has a receiving cavity 110 therein, and the metal shell 100 is grounded. The metal case 100 may have any shape, such as a cylindrical shape, a spherical shape, a square shape, and the like. The metal casing 100 may be a fully-enclosed structure or a semi-enclosed structure. The metal housing 100 may be made of any metal material, and may also be made of any alloy material with high hardness, such as stainless steel material.

The metal inductor 200 is disposed outside the metal casing 100, and the metal inductor 200 is configured to perform electric field induction on the conductor 20 to be tested to generate charges having the same size and opposite polarities as those of the conductor 20 to be tested. When the metal inductor 200 is close to the conductor 20 to be tested, a fitting capacitor 21 is formed between the metal inductor 200 and the conductor 20 to be tested. The metal inductor 200 and the conductor 20 to be tested are two plates of the fitting capacitor 21, respectively, the middle air layer is a dielectric layer, the dielectric coefficients of the dielectric layer have different values in different environments, and the metal inductor and the conductor can be specifically tested or calculated and determined according to different environments in the embodiment. The fitting capacitor 21 converts the voltage on the conductor 20 to be tested into voltages of two polar plates on the fitting capacitor 21, so that the voltage is transmitted from the conductor 20 to be tested to the metal induction part 200. The metal inductor 200 may be plate-shaped, spherical or irregular, and the metal inductor 200 is not limited in this embodiment, and only needs to fulfill the function of inducing the voltage on the conductor 20 to be measured.

The first shielding electrode 310 is disposed on the surface of the metal shell 100, and the second shielding electrode 320 is disposed on the surface of the metal shell 100 and opposite to the first shielding electrode 310. The first shielding electrode 310 and the second shielding electrode 320 may be disposed on an outer surface, an inner surface, or a surface of the metal housing 100, and the first shielding electrode 310 and the second shielding electrode 320 are disposed opposite to each other to provide a shielding electric field for the capacitor assembly 400. The first shielding electrode 310 and the second shielding electrode 320 may be the same or different, and the first shielding electrode 310 and the second shielding electrode 320 may be one or a combination of a square shape and a cylindrical shape. The first shielding electrode 310 and the second shielding electrode 320 are not limited in this embodiment, and only need to satisfy the function of providing the shielding electric field for the capacitor assembly 400.

The capacitor assembly 400 is disposed between the first shielding electrode 310 and the second shielding electrode 320 and located in the receiving cavity 110. The capacitance assembly 400 may be formed of one or more capacitors, and when the number of the capacitors is plural, the capacitors may be connected in parallel.

One end of the connection line 500 is electrically connected to the capacitor module 400, and the other end passes through the surface of the metal housing 100 and is located outside the metal housing 100. One end of the connection line 500 is electrically connected to the positive electrode plate and the negative electrode plate of the capacitor assembly 400, respectively, and the other end of the connection line 500 is used to connect a voltage acquisition device, such as a data acquisition device, a processor, a controller, etc. In this embodiment, the connection line 500 is not limited at all, and only the function of connecting the capacitor module 400 and the voltage collecting device is required to be fulfilled.

Referring to fig. 2, the working principle of the partial pressure sensor 10 according to the present embodiment is as follows:

the metal induction part 200 is close to the conductor 20 to be tested, the metal induction part 200 and the conductor 20 to be tested form a fitting capacitor 21, and the metal induction part 200 and the conductor 20 to be tested are used as two polar plates of the fitting capacitor 21. The metal sensing element 200 generates charges with the same size and opposite charges to the conductor 20 to be measured, and at this time, the fitting capacitor 21 serves as a high-voltage arm of the voltage division sensor 10. The capacitor assembly 400 is electrically connected to the metal sensor 200, and a voltage is generated on the capacitor assembly 400 through the metal sensor 200, and at this time, the capacitor assembly 400 serves as a low voltage arm of the voltage division sensor 10. The capacitor assembly 400 is connected with the connecting line 500, and finally, the connecting line 500 transmits the divided voltage on the capacitor assembly 400 to the acquisition equipment, so that the voltage of the high-voltage arm is converted into the divided voltage of the low-voltage arm, and the purpose of divided voltage sensing of the divided voltage sensor 10 is achieved.

The present embodiment provides a partial pressure sensor 10 including: metal inductor 200, metal housing 100, first shielding electrode 310, second shielding electrode 320, capacitor assembly 400 and connecting wires 500. The first shielding electrode 310 and the second shielding electrode 320 are disposed opposite to each other, the capacitor assembly 400 is disposed in the metal housing 100, and the capacitor assembly 400 is electrically connected to the metal inductor 200 and the capacitor assembly 400, respectively. When the voltage divider is used, the metal induction part 200 only needs to be close to the conductor 20 to be detected, the voltage divider sensor 10 does not need to be directly contacted with the conductor 20 to be detected or connected with other electronic devices such as a lead in the whole process, no special requirements are required on the use conditions and the use environment, and the voltage divider can be applied to the voltage detection in the open environment. The partial pressure sensor 10 of this embodiment has solved the technical problem that present partial pressure sensor 10 can't use in open environment, has reached the technological effect who improves partial pressure sensor 10 working property.

Referring to fig. 3-5, in one embodiment, the partial pressure sensor 10 further includes: rectifier 610, voltage follower 620, signal amplifier 630, inverter 640, and storage chamber 650.

The rectifier 610 is disposed on an outer surface of the metal case 100. The input end of the rectifier 610 is used for connecting an external power supply, and the output end of the rectifier 610 is electrically connected with the voltage follower 620. The rectifier 610 is used for converting the alternating current of the external power source into the direct current which can be stored by the capacitor assembly 400. The rectifier 610 may be a mechanical rectifier, an electronic tube rectifier, or a semiconductor rectifier, and in this embodiment, the rectifier 610 is not limited at all, and only needs to fulfill the function of converting ac power of an external power source into dc power.

The voltage follower 620 is disposed on an outer surface of the metal housing 100, an input end of the voltage follower 620 is electrically connected to the rectifier 610, and an output end of the voltage follower 620 is electrically connected to the first shielding electrode 310 and the second shielding electrode 320, respectively. The voltage follower 620 is a semiconductor device, and is used for stabilizing a voltage, so that the voltage on the first shielding electrode 310 and the second shielding electrode 320 is stable and does not change with the change of the load size, thereby enhancing the load capability of the voltage division sensor 10 of the embodiment. In this embodiment, the voltage follower 620 is not limited at all, and only needs to satisfy the function of stabilizing the loop voltage of the voltage division sensor 10.

The signal amplifier 630 is disposed on the outer surface of the metal shell 100, an input end of the signal amplifier 630 is electrically connected to the capacitor assembly 400, and an output end of the signal amplifier 630 is electrically connected to the connection line 500. The signal amplifier 630 is configured to amplify the voltage signal on the capacitor assembly 400, and amplify the low-voltage arm, that is, the very weak voltage signal on the capacitor assembly 400 through voltage division conversion, so as to facilitate subsequent signal acquisition by signal acquisition equipment and the like. The signal amplifier 630 is not limited in this embodiment, and only needs to satisfy the function of amplifying the voltage signal on the capacitor assembly 400.

The inverter 640 is disposed on an outer surface of the metal housing 100, an input end of the inverter 640 is electrically connected to an output end of the signal amplifier 630, and an output end of the inverter 640 is electrically connected to the connection line 500. The inverter 640 is configured to convert the dc power of the capacitor assembly 400 into ac power, which is convenient for the acquisition and processing of subsequent signal acquisition devices. In this embodiment, the type or model of the inverter 640 is not limited, and only the function of converting the direct current of the capacitor assembly 400 into the alternating current is required.

The object placing cavity 650 is disposed on the outer surface of the metal shell 100, and the rectifier 610, the voltage follower 620, the signal amplifier 630 and the inverter 640 are disposed in the object placing cavity 650. The object placing cavity 650 may be any shape such as a square shape, a rectangular shape, a circular shape, etc., the object placing cavity 650 may be made of an insulating material, and the present embodiment does not limit the object placing cavity 650 at all, and only needs to satisfy the function of accommodating the rectifier 610, the voltage follower 620, the signal amplifier 630, and the inverter 640.

In one embodiment, the capacitor assembly 400 may include a plurality of capacitors, which may be connected in parallel, and may be disposed in the receiving cavity 110 at equal intervals. The capacitor can be a fixed capacitor, a variable capacitor or a trimming capacitor, and the capacitor is not limited in any way and only needs to have a function of storing charges.

In one embodiment, the metal case 100 has a cylindrical structure, the first shielding electrode 310 and the second shielding electrode 320 are respectively disposed on the upper bottom surface and the lower bottom surface of the metal case 100, and the plurality of capacitors may be annularly disposed on the annular side surface of the metal case 100 at equal intervals or at equal angles along the central axis of the metal case 100. The plurality of capacitors may also be fixed to the upper bottom surface and/or the lower bottom surface of the metal casing 100 by a bracket or a connecting bar, and the metal casing 100 may be a fully-enclosed structure, or may be a semi-enclosed structure or an open structure.

In a specific embodiment, the center point of the first shielding electrode 310, the center point of the second shielding electrode 320, the central axis of the metal case 100, and the central axis of the plurality of capacitors are all located on the same straight line.

In an embodiment, the metal sensing element 200 may be a sensing metal plate, so that a larger mutual sensing area may be provided between the metal sensing element 200 and the conductor 20 to be measured, thereby enhancing the working performance of the partial pressure sensor of this embodiment.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.