Multi-shielding double-grounding anti-static interference probe for measuring friction electrification quantity

Abstract

The utility model discloses a multi-shielding double-grounding anti-static interference probe for measuring friction electrification quantity, which is provided with a probe head, two grounding wires, three coaxial lines and a bayonet nut connector (BNC) interface, and is characterized in that the center of the probe head is sequentially wrapped by brass, polyvinyl chloride (PVC) materials and brass, the two grounding wires are connected with the middles of the brass and the PVC materials of the probe head, and the three coaxial lines are connected with the BNC interface. The three-coaxial line is provided with a plurality of insulating layers and metal nets, so that external signal interference is reduced, and the BNC interface is used for outputting electric signals measured by the probe head. According to the utility model, the area of the probe exposed in the air is reduced as much as possible, multiple insulation shielding and metal shielding layers are adopted, two grounding wires are used to ensure a zero potential point, and the probe has the advantages of small environmental influence factors, strong anti-interference capability, accurate voltage signal output and the like.

Description

Technical Field

[0001] The utility model relates to the field of radio frequency probe design, in particular to a multi-shielded double-grounded anti-static interference probe for measuring triboelectric charge. Background Art

[0002] Triboelectric charging is a very common phenomenon in our lives. Its essence is the transfer of charge. Because the amount of triboelectric charge is very small, external environmental interference such as air flow and static electricity will affect the measurement of the triboelectric charge, resulting in inaccurate measured charge. In order to more accurately measure the amount of triboelectric charge and shield the interference of the external environment on the triboelectric charge, the utility model, when rubbing against a granular object, generates an electrical signal that is input to the measuring instrument through a three-coaxial cable. Multiple shielding layers such as insulation layers and metal layers are used to shield external interference. Double grounding ensures that the potential at one end is 0V, ensuring measurement accuracy. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a multi-shielded double-grounded anti-static probe for measuring the amount of electricity generated when the probe rubs against a granular object, thereby reducing the interference of the external environment on the triboelectric measurement.

[0004] The technical solution of the present invention is as follows: in order to reduce electron dissipation and external interference, the entire probe head is almost entirely wrapped with PVC material. In order to measure the friction charge, a brass wire with a length of 20 mm and a diameter of 1 mm is exposed to the air. When in use, the probe is inserted into the granular object to be measured. The electricity generated by the friction between the brass wire and the granular object is transmitted to the electrical measuring instrument through the three coaxial cables, thereby obtaining parameters such as voltage, current and charge. The brass wire is wrapped with a layer of PVC material for insulation, and the PVC material is wrapped with a layer of brass for electrostatic shielding, and the brass is wrapped with a layer of PVC material, and so on. There are a total of 3 layers of PVC material and 2 layers of brass outside the brass wire, thus achieving multiple shielding. Two grounding wires are led out between the two PVC materials and the brass to further control the absolute potential to 0V and ensure accurate measurement.

[0005] The probe head is centered in brass, with PVC material and brass wrapped around it in multiple layers. Two grounding wires are connected between the brass and PVC layers of the probe head to ensure a zero-voltage potential at one end. The triaxial cable features multiple insulation layers and metal mesh to reduce external signal interference. A BNC port is used to output the electrical signal measured by the probe head. This reduces the area of ​​the probe exposed to air, utilizes multiple insulation and metal shielding layers, and uses two grounding wires to ensure a zero-voltage point. This design offers advantages such as minimal environmental impact, strong anti-interference capabilities, and precise voltage signal output.

[0006] Compared with the existing technology, the present invention has the following significant benefits:

[0007] Preferably, the contact area between the probe head and the granular object is reduced, thereby reducing electron dispersion.

[0008] Preferably, insulating PVC material and conductive brass are used alternately to achieve multi-layer shielding, thereby preventing electrons from diffusing from the probe and avoiding external interference with the probe measurement.

[0009] Preferably, double grounding is adopted to ensure that the potential of one end is 0V, so that the measurement result is more accurate.

[0010] Preferably, a three-coaxial line is used so that the electrical signal generated by the friction of the brass wire can be transmitted to the electrical measuring instrument through the three-coaxial line, thereby avoiding external interference with the electrical signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Axonometric drawing of the schematic diagram of the utility model

[0012] Figure 2 Schematic diagram of the probe head of this utility model

[0013] Figure 3 This is a cross-sectional view of the probe head of the utility model

[0014] As shown in the figure:

[0015] 1. Probe head, 2. Two ground wires, 3. Triaxial cable, 4. BNC interface. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0017] See also Figure 1-3 The technical solution of the present invention is as follows: in order to reduce electron dissipation and external interference, the probe head 1 is almost entirely wrapped with PVC material. In order to measure the friction charge, a brass wire with a length of 20 mm and a diameter of 1 mm is exposed to the air. When in use, the probe is inserted into the granular object to be measured. The electricity generated by the friction between the brass wire and the granular object is transmitted to the electrical measuring instrument through the three coaxial cables 3, thereby obtaining parameters such as voltage, current and charge. The brass wire is wrapped with a layer of PVC material for insulation, and the PVC material is wrapped with a layer of brass for electrostatic shielding, and the brass is wrapped with a layer of PVC material, and so on. There are a total of 3 layers of PVC material and 2 layers of brass outside the brass wire, thus achieving multiple shielding. Two grounding wires 2 are led out between the two PVC materials and the brass to further control the absolute potential to 0V and ensure accurate measurement.

[0018] Compared with the existing technology, the present invention has the following significant benefits:

[0019] Preferably, the contact area between the probe head 1 and the granular object is reduced, thereby reducing electron dispersion.

[0020] Preferably, insulating PVC material and conductive brass are used alternately to achieve multi-layer shielding, thereby preventing electrons from diffusing from the probe and avoiding external interference with the probe measurement.

[0021] Preferably, double grounding is adopted to ensure that the potential of one end is 0V, so that the measurement result is more accurate.

[0022] Preferably, a three-coaxial line 3 is used so that the electrical signal generated by the friction of the brass wire can be transmitted to the electrical measuring instrument through the three-coaxial line 3, thereby avoiding external interference with the electrical signal.

[0023] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multi-shielded, double-grounded, anti-static interference probe for measuring triboelectric charge, comprising: The probe head (1) is characterized in that: the center of the probe head (1) is brass, and PVC material and brass are wrapped in multiple layers in sequence; two grounding wires (2) are connected to the middle of the brass and PVC materials of the probe head (1) to ensure that the potential at one end is 0V; the three coaxial lines (3) have multiple insulation layers and metal meshes to reduce external signal interference; and a BNC interface (4) is used to output the electrical signal measured by the probe head (1).

2. A multi-shielded double-grounded anti-static interference probe for measuring triboelectric charge according to claim 1, characterized in that: The probe head is wrapped with PVC material. In order to measure the triboelectric charge, a brass wire with a length of 20 mm and a diameter of 1 mm is exposed to the air and transmitted to the electrical measuring instrument through three coaxial cables (3), thereby obtaining the voltage, current and charge parameters.

3. A multi-shielded double-grounded anti-static interference probe for measuring triboelectric charge according to claim 1, characterized in that: The brass wire at the core of the probe head (1) is wrapped with a layer of PVC material for insulation, the PVC material is wrapped with a layer of brass for electrostatic shielding, and the brass is wrapped with a layer of PVC material.

4. A multi-shielded double-grounded anti-static interference probe for measuring triboelectric charge according to claim 3, characterized in that: There are 3 layers of PVC material and 2 layers of brass outside the brass wire, thus achieving multiple shielding.

5. The multi-shielded double-grounded anti-static interference probe for measuring triboelectric charge according to claim 1, characterized in that: Two grounding wires (2) are drawn between the two PVC materials and the brass to further control the absolute potential to 0V and ensure the accuracy of the measurement.

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