Atmospheric environment pollution deposition quality detection sensor and preparation method thereof

Abstract

The invention discloses an atmospheric environment pollution deposition quality detection sensor and a preparation method thereof, the atmospheric environment pollution deposition quality detection sensor comprises a quartz crystal microbalance, the upper surface of the quartz crystal microbalance is provided with a detection electrode, and the lower surface of the quartz crystal microbalance is provided with an excitation electrode. The excitation electrode is provided with a conductive wire which is connected with the PCB, and the PCB is provided with an elastic needle which is connected with detection equipment so as to carry out signal detection. According to the atmospheric environment dirt deposition quality detection sensor provided by the invention, the quality of dirt adsorbed on the upper surface of the quartz crystal microbalance is directly detected by detecting the change of the resonant frequency of the quartz crystal microbalance, so that the frequency and accuracy of data updating are improved; the sensor is reasonable in structural design, can accurately reflect the quality of dirt, and provides powerful guarantee for safe operation of a detection system.

Description

Technical Field

[0001] The invention relates to the technical field of pollution deposition amount detection, and in particular to a pollution deposition amount detection sensor on an insulator surface in a power grid environment. Background Art

[0002] With the deterioration of the atmospheric environment, the intensification of air pollution and the increase in the amount of dust in the air, many components and equipment, especially power components and equipment such as photovoltaic panels and insulators, will have dirt deposited on their surfaces. The operating voltage of the power grid increases. After a period of operation, the power grid is affected by the attachment and deposition of dirt, resulting in the reduction of the external insulation protection performance of the equipment, which is prone to flashover accidents. In order to ensure the safe operation of the line, inspection, cleaning and maintenance systems have been established. The existing method of measuring the degree of dirtiness is mainly on-site manual cleaning and wiping sampling, and the accumulated dirt quality data is obtained after processing and calculation.

[0003] However, this method is too cumbersome, requires a lot of manpower and material resources, has a long data update cycle, and the amount of accumulated pollution is a dynamically changing data as it is washed away by rainwater, which leads to low accuracy, and cannot timely reflect environmental changes and changes in the amount of accumulated pollution, and it is difficult to meet the needs of online detection and real-time updates. In order to achieve the purpose of real-time online detection of the quality of pollution deposition, the existing common technologies include leakage current method, pollution layer conductivity method and optical fiber method, but these methods have certain disadvantages. For example, leakage current has high measurement requirements and complex installation, and cannot directly obtain quality data. The optical fiber method uses optical fiber as a receiving detection unit, but its surface morphology and exposure method are very different from those of insulators, and it is related to the composition state of the object being measured through the refraction and scattering of light, and cannot accurately reflect the quality of the pollutant. Summary of the invention

[0004] In view of the fact that the current online pollution deposition mass detection sensor cannot meet the requirements of having a material similar to that of the object to be tested (insulator), having the same exposure and pollution accumulation conditions, and detecting the pollution deposition mass quickly and accurately, the present invention provides a pollution deposition mass sensor with a completely exposed and unobstructed surface and a surface state similar to that of an insulator, which can directly detect the pollution deposition mass.

[0005] To achieve the above object, the embodiments of the present invention adopt the following technical solutions:

[0006] A sensor for detecting the mass of pollution deposition in an atmospheric environment comprises a housing, a quartz crystal microbalance and a PCB board, wherein the quartz crystal microbalance is arranged at the upper part of the housing, and the PCB board is arranged at the lower part of the housing, a detection electrode is arranged on the upper surface of the quartz crystal microbalance, and the detection electrode is connected to the edge of the lower surface of the quartz crystal microbalance through an electrode lead, and an excitation electrode, a first electrode connection point and a second electrode connection point are arranged on the lower surface of the quartz crystal microbalance; the detection electrode is connected to the edge of the lower surface of the quartz crystal microbalance and the first electrode connection point through an electrode lead; the excitation electrode is connected to the second electrode connection point; the first electrode connection point and the second electrode connection point are connected to the PCB board through a conductive wire; a spring pin is arranged on the PCB board, and the spring pin is connected to a detection device for signal detection.

[0007] Preferably, the quartz crystal microbalance is a quartz disc; the quartz crystal microbalance has a diameter of 25 mm and a thickness of 0.2 mm.

[0008] Preferably, the quartz disc is a high-purity quartz crystal; the quartz disc is obtained by AT cutting.

[0009] Preferably, the detection electrode is a gold electrode, and the diameter of the detection electrode is 10-15 mm.

[0010] Preferably, the excitation electrode is a gold electrode, and the diameter of the excitation electrode is 5-10 mm.

[0011] Preferably, the electrode lead is a gold electrode, and the electrode lead is arranged on the surface of the quartz crystal microbalance by electroplating.

[0012] Preferably, the edge of the quartz crystal microbalance is fixed to the housing by epoxy glue.

[0013] On the other hand, a method for preparing a sensor for detecting atmospheric pollution deposition quality is provided, characterized in that the method is used to prepare the above-mentioned sensor, comprising:

[0014] Sensor manufacturing: AT cutting of high purity quartz crystal to obtain quartz crystal microbalance;

[0015] Electrode arrangement: gold is plated on the lower surface of the quartz crystal microbalance to form an excitation electrode, gold is plated on the upper surface of the quartz crystal microbalance to form a detection electrode, and gold is plated on the surface of the quartz crystal microbalance to form an electrode lead while gold is plated to form the detection electrode, and gold is plated at the position of the electrode lead on the lower surface to form a circuit connection point between the excitation electrode and the detection electrode;

[0016] Sealing and fixing: the non-electrode part of the lower surface of the quartz crystal microbalance is sealed and fixed on the housing;

[0017] Electrode connection: solder the spring pins on the PCB board, solder one end of the conductive wire to the connection point of the quartz crystal microbalance circuit, and solder the other end of the conductive wire to the PCB board.

[0018] Preferably, in the electrode connection, the conductive wire is welded by soldering platinum wire or ultrasonically welding aluminum wire.

[0019] Preferably, epoxy glue is used to seal and fix the non-electrode portion of the lower surface of the quartz crystal microbalance.

[0020] The advantages of the implementation of the present invention are as follows: by adopting a quartz crystal microbalance as the main component of the sensor, the change in the resonant frequency of the quartz crystal microbalance is detected to directly detect the quality of the dirt adsorbed on the upper surface of the quartz crystal microbalance, thereby realizing real-time online detection of the dirt deposition quality, avoiding the tediousness and time-consuming nature of the traditional method, and improving the frequency and accuracy of data updates; the sensor has a reasonable structural design, the upper surface is completely exposed and unobstructed, and the pollution accumulation condition is the same as that of the insulator, which can accurately reflect the quality of the dirt and provide a strong guarantee for the safe operation of the detection system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a schematic diagram of the structure of a sensor for detecting the quality of pollution deposition in an atmospheric environment according to the present invention;

[0023] Figure 2 It is a schematic diagram of the lower side appearance of an atmospheric environment pollution deposition mass detection sensor and a preparation method thereof according to the present invention;

[0024] Figure 3 It is a schematic diagram of the upper appearance of an atmospheric environment pollution deposition mass detection sensor and a preparation method thereof according to the present invention;

[0025] Figure 4 A top view of an atmospheric pollution deposition mass detection sensor and a preparation method thereof according to the present invention;

[0026] Figure 5 It is a bottom view of an atmospheric environment pollution deposition mass detection sensor and a preparation method thereof according to the present invention.

[0027] Figure numerals: 1. quartz crystal microbalance; 2. detection electrode; 3. excitation electrode; 4. conductive wire; 5. PCB board; 6. spring pin; 7. housing; 8. electrode lead; 9. electrode connection point; 10. epoxy glue. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Example 1

[0030] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a sensor for detecting the quality of pollution deposition in an atmospheric environment comprises a housing 7, a quartz crystal microbalance 1 and a PCB board 5, wherein the quartz crystal microbalance 1 is arranged at the upper part of the housing 7, and the PCB board 5 is arranged at the lower part of the housing 7, and a detection electrode 2 is arranged on the upper surface of the quartz crystal microbalance 1, and the detection electrode 2 is connected to the edge of the lower surface of the quartz crystal microbalance 1 through an electrode lead 8, and an excitation electrode 3, a first electrode connection point 9 and a second electrode connection point 91 are arranged on the lower surface of the quartz crystal microbalance 1; the detection electrode 2 is connected to the edge of the lower surface of the quartz crystal microbalance 1 and the first electrode connection point 9 through the electrode lead 8; the excitation electrode 3 is connected to the second electrode connection point 91; the first electrode connection point 9 and the second electrode connection point 91 are connected to the PCB board 5 through a conductive wire 4; a spring pin 6 is arranged on the PCB board 5, and the spring pin 6 is connected to a detection device for signal detection.

[0031] Among them, the quartz crystal microbalance 1 is a quartz disc; the diameter of the quartz crystal microbalance 1 is 25mm and the thickness is 0.2mm. The quartz disc is a high-purity quartz crystal; the quartz disc is obtained by AT cutting. There is a linear relationship between the change in the resonant frequency of this quartz disc and the mass of the contaminants adsorbed on its upper surface, and its temperature coefficient can be ignored at room temperature. The basic frequency of the quartz crystal is about 8MHz. By using the quartz crystal microbalance 1 as the core detection element, the mass of the contaminants adsorbed on the upper surface of the quartz crystal microbalance 1 can be directly detected by detecting the change in the resonant frequency of the quartz crystal microbalance 1. The theoretical mass resolution of the quartz crystal microbalance 1 can reach the nanogram level.

[0032] The detection electrode 2 is a gold electrode, and the diameter of the detection electrode 2 is 12 mm. The excitation electrode 3 is a gold electrode, and the diameter of the excitation electrode 3 is 6 mm. The electrode lead 8 is a gold electrode, and the electrode lead 8 is arranged on the surface of the quartz crystal microbalance 1 by electroplating. In order to solve the problem that the upper surface of the contamination surface is unobstructed, which is the same as the contamination condition of the insulator, the present invention uses the circuit connection points on the lower surface and the upper surface is completely exposed and unobstructed.

[0033] Example 2

[0034] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a sensor for detecting the quality of pollution deposition in an atmospheric environment comprises a housing 7, a quartz crystal microbalance 1 and a PCB board 5, wherein the quartz crystal microbalance 1 is arranged at the upper part of the housing 7, and the PCB board 5 is arranged at the lower part of the housing 7, and a detection electrode 2 is arranged on the upper surface of the quartz crystal microbalance 1, and the detection electrode 2 is connected to the edge of the lower surface of the quartz crystal microbalance 1 through an electrode lead 8, and an excitation electrode 3, a first electrode connection point 9 and a second electrode connection point 91 are arranged on the lower surface of the quartz crystal microbalance 1; the detection electrode 2 is connected to the edge of the lower surface of the quartz crystal microbalance 1 and the first electrode connection point 9 through the electrode lead 8; the excitation electrode 3 is connected to the second electrode connection point 91; the first electrode connection point 9 and the second electrode connection point 91 are connected to the PCB board 5 through a conductive wire 4; a spring pin 6 is arranged on the PCB board 5, and the spring pin 6 is connected to a detection device for signal detection.

[0035] Among them, the quartz crystal microbalance 1 is a quartz disc; the diameter of the quartz crystal microbalance 1 is 25mm and the thickness is 0.2mm. The quartz disc is a high-purity quartz crystal; the quartz disc is obtained by AT cutting. There is a linear relationship between the change in the resonant frequency of this quartz disc and the mass of the contaminants adsorbed on its upper surface, and its temperature coefficient can be ignored at room temperature. The basic frequency of the quartz crystal is about 8MHz. By using the quartz crystal microbalance 1 as the core detection element, the mass of the contaminants adsorbed on the upper surface of the quartz crystal microbalance 1 can be directly detected by detecting the change in the resonant frequency of the quartz crystal microbalance 1. The theoretical mass resolution of the quartz crystal microbalance 1 can reach the nanogram level.

[0036] The detection electrode 2 is a gold electrode, and the diameter of the detection electrode 2 is 12 mm. The excitation electrode 3 is a gold electrode, and the diameter of the excitation electrode 3 is 6 mm. The electrode lead 8 is a gold electrode, and the electrode lead 8 is arranged on the surface of the quartz crystal microbalance 1 by electroplating. In order to solve the problem that the upper surface of the contamination surface is unobstructed, which is the same as the contamination condition of the insulator, the present invention uses the circuit connection points on the lower surface and the upper surface is completely exposed and unobstructed.

[0037] Among them, the edge of the quartz crystal microbalance 1 is fixed to the housing 7 by epoxy glue 10. Sealing the electrode lead 8 by epoxy glue 10 has significant advantages. It has high adhesion and sealing properties, can firmly adhere to the electrode lead 8, and effectively prevent external erosion; chemical medium stability, ensure that the electrode lead 8 is not affected by chemical substances; excellent electrical insulation performance, to ensure circuit stability and safety; good temperature resistance, adapt to high temperature working environment; and small curing shrinkage and low water absorption, to maintain sealing tightness and prevent moisture erosion. These advantages together improve the stability and reliability of the electrode lead 8 and extend the service life of electronic products.

[0038] Example 3

[0039] A method for preparing an atmospheric pollution deposition quality detection sensor comprises the following steps:

[0040] Sensor manufacturing: AT cutting is performed on high-purity quartz crystal to obtain quartz crystal microbalance 1;

[0041] Electrode arrangement: the lower surface of the quartz crystal microbalance 1 is plated with gold to form an excitation electrode 3, the upper surface of the quartz crystal microbalance 1 is plated with gold to form a detection electrode 2, and while the detection electrode 2 is plated with gold, the surface of the quartz crystal microbalance 1 is plated with gold to form an electrode lead 8, and the position of the electrode lead 8 on the lower surface is plated with gold to form a circuit connection point between the excitation electrode 3 and the detection electrode 2;

[0042] Sealing and fixing: the non-electrode part of the lower surface of the quartz crystal microbalance 1 is sealed and fixed on the housing 7;

[0043] Electrode connection: solder the spring pin 6 on the PCB board 5, solder one end of the conductive wire 4 to the circuit connection point of the quartz crystal microbalance 1, and solder the other end of the conductive wire 4 to the PCB board 5.

[0044] Among them, in the electrode connection, the welding method of the conductive wire 4 is tin soldering platinum wire or ultrasonic welding aluminum wire.

[0045] The non-electrode portion of the lower surface of the quartz crystal microbalance 1 is sealed and fixed using epoxy glue 10 .

[0046] Example 1 adopts the preparation method of Example 3, and the products and preparation methods of Examples 4-6 are the same as those of Example 1, and the only difference is the diameter of the quartz crystal microbalance 1. The diameter and performance test results of the quartz crystal microbalance 1 of Example 1 and Examples 4-6 are shown in Table 1.

[0047] Table 1 Quartz disc diameter and frequency of the embodiment

[0048]

[0049] The basic frequency of the quartz crystal microbalance 1 is 3-10MHz, and quartz crystal microbalances 1 of different diameters can achieve the purpose of quality detection. From the analysis of Example 1 and Examples 4-6, it can be seen that the higher the frequency of the quartz crystal microbalance 1, the higher the resolution. However, the thickness of the quartz crystal microbalance 1 itself becomes thinner and fragile. Through the analysis of the embodiments, it can be seen that Example 1 has the best comprehensive performance, is not fragile, and has a high resolution.

[0050] The advantages of the implementation of the present invention are as follows: by adopting a quartz crystal microbalance 1 as the main component of the sensor, the change in the resonant frequency of the quartz crystal microbalance 1 is detected to directly detect the mass of the dirt adsorbed on the upper surface of the quartz crystal microbalance 1, thereby realizing real-time online detection of the dirt deposition mass, avoiding the tediousness and time-consuming nature of the traditional method, and improving the frequency and accuracy of data updates; the sensor has a reasonable structural design, the upper surface is completely exposed and unobstructed, and is in the same pollution accumulation condition as the insulator, and can accurately reflect the quality of the dirt, providing a strong guarantee for the safe operation of the detection system.

[0051] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the art within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A sensor for detecting the mass of atmospheric pollution deposition, comprising a housing (7), a quartz crystal microbalance (1) and a PCB board (5), characterized in that: The quartz crystal microbalance (1) is arranged at the upper part of the housing (7), and the PCB board (5) is arranged at the lower part of the housing (7). The upper surface of the quartz crystal microbalance (1) is provided with a detection electrode (2), and the detection electrode (2) is connected to the edge of the lower surface of the quartz crystal microbalance (1) through an electrode lead (8). The lower surface of the quartz crystal microbalance (1) is provided with an excitation electrode (3), a first electrode connection point (9), and a second electrode connection point (91); the detection electrode (2) is connected to the edge of the lower surface of the quartz crystal microbalance (1) and the first electrode connection point (9) through the electrode lead (8); the excitation electrode (3) is connected to the second electrode connection point (91); the first electrode connection point (9) and the second electrode connection point (91) are connected to the PCB board (5) through a conductive wire (4); and a spring pin (6) is provided on the PCB board (5), and the spring pin (6) is connected to a detection device for signal detection.

2. The sensor according to claim 1, characterized in that The quartz crystal microbalance (1) is a quartz disc; the diameter of the quartz crystal microbalance (1) is 10-30 mm, and the thickness is 0.1-0.3 mm.

3. The sensor according to claim 2, characterized in that The quartz disc is a quartz crystal; the quartz disc is obtained by AT cutting.

4. The sensor according to claim 1, characterized in that The detection electrode (2) is a gold electrode, and the diameter of the detection electrode (2) is 10-15 mm.

5. The sensor according to claim 1, characterized in that The excitation electrode (3) is a gold electrode, and the diameter of the excitation electrode (3) is 5-10 mm.

6. The sensor according to claim 1, characterized in that The electrode lead (8) is a gold electrode, and the electrode lead (8) is arranged on the surface of the quartz crystal microbalance (1) by electroplating.

7. The sensor according to claim 1, characterized in that The edge of the quartz crystal microbalance (1) is fixed to the housing (7) by epoxy glue (10).

8. A method for preparing a sensor for detecting atmospheric pollution deposition quality, characterized in that: For preparing the sensor according to any one of claims 1 to 7, comprising: Sensor manufacturing: AT cutting of high purity quartz crystal to obtain quartz crystal microbalance (1); Electrode arrangement: the lower surface of the quartz crystal microbalance (1) is plated with gold to form an excitation electrode (3), the upper surface of the quartz crystal microbalance (1) is plated with gold to form a detection electrode (2), and while the detection electrode (2) is plated with gold, the surface of the quartz crystal microbalance (1) is plated with gold to form an electrode lead (8), and gold is plated at the position of the electrode lead (8) on the lower surface to form a circuit connection point between the excitation electrode (3) and the detection electrode (2); Sealing and fixing: sealing and fixing the non-electrode portion of the lower surface of the quartz crystal microbalance (1) on the housing (7); Electrode connection: solder a spring pin (6) on a PCB board (5), solder one end of a conductive wire (4) to a circuit connection point of a quartz crystal microbalance (1), and solder the other end of the conductive wire (4) to a PCB board (5).

9. The preparation method according to claim 9, characterized in that: In the electrode connection, the conductive wire (4) is welded by tin soldering platinum wire or ultrasonic welding aluminum wire.

10. The sensor according to claim 8-9, characterized in that: The epoxy glue (10) is used to seal and fix the non-electrode portion of the lower surface of the quartz crystal microbalance (1).

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