Negative pressure sucker type voltage signal measuring device

Abstract

The invention belongs to the technical field of voltage signal measurement, and particularly relates to a negative pressure sucker type voltage signal measuring device, the edge of a flexible sucker is fixed at the edge of the bottom of a cavity, the center of the flexible sucker is provided with an opening, the opening is communicated with an elastic cavity through a conducting pipe, and the conducting pipe movably penetrates through the top of the cavity and is connected with the elastic cavity through a connecting pipe. The first annular electrode and the second annular electrode are arranged on the outer side of the cavity on the flexible suction cup, the first annular electrode is located on the side close to the edge of the cavity, the second annular electrode is located on the side close to the center of the flexible suction cup, and the first annular electrode does not make contact with the second annular electrode. According to the invention, through negative pressure adsorption force formed by the flexible sucker, the electrode is in close contact with the surface of the to-be-measured object, so that measurement errors caused by poor contact are avoided; meanwhile, double annular electrodes are designed and are matched with each other, so that the signal purity and the measurement precision are improved. According to the above effects, the method has a good application prospect in the technical field of voltage signal measurement.

Description

Technical Field

[0001] The present application belongs to the technical field of voltage signal measurement, and in particular relates to a negative pressure suction cup type voltage signal measurement device. Background Art

[0002] Voltage signal measurement plays an important role in modern technology applications and is widely used in industrial automation, environmental monitoring, medical monitoring and other fields. The traditional voltage signal measurement method usually attaches electrodes directly to the surface of the object to be measured. Although this method is simple, it has many problems and limitations in practical applications, which affects the stability, accuracy and reliability of the measurement.

[0003] For example, in industrial automation and environmental monitoring, voltage signal measurement equipment needs to have high anti-interference ability and stability to work properly in complex and harsh environments. The method of directly attaching electrodes is more susceptible to electromagnetic interference and mechanical vibration in such an environment, resulting in unstable measurement data and failure to meet the needs of high-precision measurement. Oil, dust, etc. in industrial environments will also affect the contact quality between the electrode and the surface of the object to be measured, further reducing the measurement accuracy and reliability. In addition, after the electrode is attached to the surface of the object to be measured, it is not easy to move the electrode again.

[0004] Therefore, it is of great significance to design a new voltage signal measurement device to overcome the shortcomings of traditional surface voltage signal measurement devices. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a negative pressure suction cup type voltage signal measuring device, including a cavity, a flexible suction cup, a conducting tube, an elastic cavity, a first annular electrode, and a second annular electrode. The edge of the flexible suction cup is fixed to the edge of the bottom of the cavity; in a natural state, the flexible suction cup is recessed into the cavity. An opening is provided in the center of the flexible suction cup, and the opening is connected to the elastic cavity through a conducting tube, and the conducting tube can movably pass through the top of the cavity. The first annular electrode and the second annular electrode are arranged on the outer side of the cavity on the flexible suction cup, the first annular electrode is located on the side close to the edge of the cavity, and the second annular electrode is located on the side close to the center of the flexible suction cup, and the first annular electrode and the second annular electrode are not in contact. When used, the first wire passes through the flexible suction cup, one end of the first wire is electrically connected to the second annular electrode, and the other end of the first wire is used for signal output, squeezing the elastic cavity, forming a negative pressure in the elastic cavity, and the flexible suction cup is adsorbed on the surface of the object to be measured, and the first annular electrode and the second annular electrode are closely attached to the surface of the object to be measured.

[0006] The present invention uses a flexible suction cup and negative pressure adsorption technology to achieve stable contact between the electrode and the surface of the object to be measured, thereby improving the stability and accuracy of the measurement signal; at the same time, the layout of the annular electrode is used to optimize the collection of voltage signals and interference shielding.

[0007] Furthermore, the material of the cavity is low carbon steel. Low carbon steel has a high electromagnetic field absorption capacity, and the low carbon steel material forms a good shielding shell, effectively shielding external electromagnetic interference, protecting the internal measurement signal from the influence of the external environment, and improving the measurement accuracy and stability.

[0008] Furthermore, the material of the conducting tube is stainless steel. Stainless steel has high mechanical strength and hardness, can withstand greater pressure and mechanical stress, and ensure the stability and durability of the conducting tube during use. In addition, the surface of stainless steel is smooth and the friction coefficient is low, so the conducting tube can remain smooth when moving and reduce friction; at the same time, the stainless steel conducting tube also has low resistance to the gas flowing inside.

[0009] Furthermore, the elastic cavity and the flexible suction cup are made of rubber. For the flexible suction cup, the rubber can closely fit various shapes and textures of the surface of the object to be measured, ensuring good contact between the electrode and the surface, making it suitable for measuring complex and irregular surfaces. For the elastic cavity, the rubber material has good sealing performance and can effectively form negative pressure, so that the flexible suction cup is firmly adsorbed on the surface of the object to be measured, improving the stability and durability of adsorption.

[0010] Furthermore, the cross section of the first annular electrode extends to the other side of the flexible suction cup. In application, the parts of the first annular electrode on both sides of the flexible suction cup are connected through some through holes. In this way, the first annular electrode has a larger shielding area, lower resistance and inductance, and can more effectively shield electromagnetic interference from the surface of the object, reducing the influence of external noise on the measurement signal.

[0011] Furthermore, the material of the first annular electrode is conductive rubber, and the material of the second annular electrode is silver / silver chloride. Conductive rubber has excellent flexibility, can better fit and adapt to the shape and texture of the surface of the object to be measured, and ensure good contact and stability of the electrode; conductive rubber also has good conductivity and electromagnetic shielding performance, and can effectively shield external electromagnetic interference. Silver / silver chloride electrodes have low and stable electrode potentials, which are conducive to high-precision voltage signal measurements; in addition, silver / silver chloride exhibits excellent stability in electrochemical reactions, can reduce fluctuations in interface potential, and ensure the stability and reliability of measurement signals. In the present invention, conductive rubber, as the first annular electrode, is mainly responsible for electromagnetic shielding; silver / silver chloride electrodes, as the second annular electrode, focus on high-static voltage signal measurements; the combination of the two materials optimizes the performance of the entire measurement system.

[0012] Furthermore, the thickness of the first annular electrode is small on the side close to the edge of the cavity, and large on the side close to the center of the flexible suction cup. In other words, by designing the electrode thickness to gradually increase, a shielding effect that gradually increases from the edge to the center is achieved, which more effectively blocks external electromagnetic interference and ensures that the measurement signal in the center area is purer. In addition, the electrode thickness is larger on the side close to the center, which increases the mechanical strength and stability of the electrode in the center area, ensuring that the electrode maintains good contact with the surface of the object to be measured in the center area; at the same time, the thickness is smaller on the side close to the edge, making the electrode edge softer, and can better fit and adapt to subtle changes in the surface of the object to be measured, ensuring the contact quality of the entire electrode.

[0013] Furthermore, the top surface of the first annular electrode is wide, and the bottom surface of the first annular electrode is narrow. The design of the wide top surface increases the contact area of ​​the electrode, enhances the support capacity of the flexible suction cup and the cavity, and increases the stability of the overall structure. When used, the first annular electrode is adsorbed on the surface of the object to be measured. Such a design can better block the air from flowing through the cross section between the first annular electrode and the object to be measured, thereby enhancing the stability of the system.

[0014] Furthermore, a scale is marked on the conduction tube outside the cavity. Through the scale, the user can accurately locate the position of the conduction tube to achieve precise negative pressure regulation and adsorption strength of the flexible suction cup. This precise control ensures the consistency of each operating condition and improves the repeatability and reliability of experiments and measurements. In addition, the scale can also help users intuitively see the position of the conduction tube, reducing the blindness and uncertainty of adjustment, thereby simplifying the operation steps. This intuitive design not only reduces errors caused by human factors, but also improves the accuracy and efficiency of the overall operation.

[0015] Furthermore, when applied, a second wire is applied to penetrate the flexible suction cup to connect the first annular electrode; and at the same time, the first wire is applied to penetrate the flexible suction cup to connect the second annular electrode. The electrical signals of the first annular electrode and the second annular electrode are collected respectively to obtain two independent signal channels. The two signals are amplified respectively using a low-noise preamplifier to improve the signal strength and reduce the influence of noise. The two signals are filtered respectively to remove high-frequency noise and unnecessary frequency components to ensure the purity of the signal. The amplified and filtered signals are input into the differential amplifier to calculate the difference between the two electrode signals. The differential amplifier can effectively suppress common-mode noise, thereby enhancing the signal-to-noise ratio. By comparing the difference between the two electrode signals, the strength of the noise signal can be determined. If the difference between the two electrode signals is large, it means that there is strong noise interference; if the difference is small, it means that the noise influence is weak. Combine the signals of the two electrodes, and extract a more stable and accurate voltage signal through weighted averaging or other fusion algorithms. In addition, according to the result of differential processing, the measurement signal can also be corrected and compensated for noise to improve the accuracy of the final signal.

[0016] Beneficial effects of the present invention: (1) The negative pressure adsorption force formed by the flexible suction cup of the present invention enables the electrode to be in close contact with the surface of the object to be measured, thereby avoiding measurement errors caused by poor contact.

[0017] (2) The present invention designs a double annular electrode, wherein the first annular electrode is located at the edge of the cavity to shield external electromagnetic interference; the second annular electrode is located at the center of the flexible suction cup to accurately measure the voltage signal; the two cooperate with each other to improve the signal purity and measurement accuracy.

[0018] (3) The cavity in the present invention reduces the influence of external dust and moisture on voltage measurement, thereby improving the reliability of the measurement results.

[0019] (4) The structure of the present invention is relatively simple and easy to manufacture and operate. After measuring one part of an object, it is easy to move the device to measure another part of the object.

[0020] Based on the above beneficial effects, the present invention has good application prospects in the field of voltage signal measurement technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The schematic diagram of a negative pressure suction cup voltage signal measuring device is shown in FIG.

[0022] Figure 2 It is a schematic diagram of another negative pressure suction cup type voltage signal measuring device.

[0023] In the figure: 1. cavity; 2. flexible suction cup; 3. conducting tube; 4. elastic cavity; 5. first annular electrode; 6. second annular electrode. DETAILED DESCRIPTION

[0024] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and examples.

[0025] The present invention provides a negative pressure suction cup type voltage signal measuring device, such as Figure 1As shown, it includes a cavity 1, a flexible suction cup 2, a conducting tube 3, an elastic cavity 4, a first annular electrode 5, and a second annular electrode 6. The material of the cavity 1 is low carbon steel, the cavity 1 is cylindrical, and the specific size is designed according to actual needs, and no specific restrictions are made here; the cavity 1 provides structural support and mechanical protection, and low carbon steel has a good electromagnetic shielding effect, which can effectively shield external electromagnetic interference and improve the accuracy of measurement. The material of the flexible suction cup 2 is rubber, the flexible suction cup 2 is circular, and the shape of the flexible suction cup 2 matches the shape of the cavity 1. The edge of the flexible suction cup 2 is fixed to the edge of the bottom of the cavity 1. In the natural state, the flexible suction cup 2 is recessed into the cavity 1. An opening is provided in the center of the flexible suction cup 2, and the opening is connected to the elastic cavity 4 through the conducting tube 3. The material of the conducting tube 3 is stainless steel, the conducting tube 3 is a cylindrical pipe, and the diameter and length of the conducting tube 3 are determined according to the specific design requirements of the device. The conducting tube 3 can movably pass through the top of the cavity 1. There are scales on the conducting tube 3 outside the cavity 1. The conducting tube 3 provides an airtight passage for controlling and adjusting the negative pressure of the flexible suction cup 2, ensuring that the flexible suction cup 2 can be tightly adsorbed on the surface of the object to be measured; at the same time, the scale mark facilitates accurate control of the position of the conducting tube 3. The material of the elastic cavity 4 is rubber, and the elastic cavity 4 is a deformable cavity, and the size is adjusted according to the design of the flexible suction cup 2 and the conducting tube 3. The elastic cavity 4 is located outside the cavity 1, which is convenient for manipulation. The function of the elastic cavity 4 is to form a negative pressure. By squeezing the elastic cavity 4, a negative pressure is generated inside the flexible suction cup 2, so that the flexible suction cup 2 is tightly adsorbed on the surface of the object to be measured, ensuring good contact between the electrode and the surface. The material of the first annular electrode 5 is conductive rubber, and the first annular electrode 5 is arranged on the outside of the cavity 1 on the flexible suction cup 2, and the first annular electrode 5 is located on the edge side close to the cavity 1. The first annular electrode 5 provides electromagnetic shielding, reduces external electromagnetic interference, and improves the purity of the measurement signal. In addition, when in use, the first annular electrode 5 is closely attached to the surface of the object to be measured, and also blocks the outside air from entering the internal negative pressure area. The material of the second annular electrode 6 is silver / silver chloride. The second annular electrode 6 is also arranged on the outer side of the cavity 1 on the flexible suction cup 2, and the second annular electrode 6 is located near the center of the flexible suction cup 2. The second annular electrode 6 is used to accurately measure the voltage signal on the surface of the object to be measured. The silver / silver chloride material has excellent conductivity and electrochemical stability, ensuring the accuracy and reliability of the signal measurement. The first annular electrode 5 and the second annular electrode 6 do not contact, and the distance between the first annular electrode 5 and the second annular electrode 6 is greater than 10 microns.

[0026] When used, the first wire passes through the flexible suction cup 2, one end of the first wire is electrically connected to the second annular electrode 6, and the other end of the first wire is used for signal output. By squeezing the elastic cavity 4, a negative pressure is formed in the elastic cavity 4, and through the conductive tube 3, a negative pressure is also formed in the flexible suction cup 2, and the flexible suction cup 2 is adsorbed on the surface of the object to be measured. The first annular electrode 5 and the second annular electrode 6 are closely attached to the surface of the object to be measured. The original voltage signal on the surface of the object to be measured is transmitted on the first wire. After filtering, analog-to-digital conversion, and digital signal processing, the original voltage signal is obtained. The final voltage signal.

[0027] Preferably, if Figure 2 As shown, the cross section of the first annular electrode 5 extends to the other side of the flexible suction cup 2. The flexible suction cup 2 is provided with a through hole, and the first annular electrode 5 extends to the other side of the flexible suction cup 2 through the through hole, which increases the cross-sectional area and overall volume of the first annular electrode 5 and improves the electromagnetic shielding capability of the first annular electrode 5.

[0028] Preferably, the width of the first annular electrode 5 is 10 mm. The thickness of the first annular electrode 5 is small on the side close to the edge of the cavity 1; the thickness of the first annular electrode 5 is large on the side close to the center of the flexible suction cup 2. The thickness of the first annular electrode 5 on the side close to the edge of the cavity 1 is 1 mm, which makes the electrode more flexible in the edge area and can better fit the slight unevenness of the surface of the object to be measured to ensure good contact; the thickness of the first annular electrode 5 on the side close to the center of the flexible suction cup 2 is 5 mm, which can provide a stronger electromagnetic shielding effect in the central area, reduce electromagnetic interference in the central area, and improve the purity of the measurement signal. In addition, the thicker design also provides higher mechanical strength in the central area, ensuring that the electrode is stable during the adsorption process and reducing deformation or displacement caused by mechanical stress.

[0029] Preferably, the top surface of the first annular electrode 5 is wide, and the bottom surface of the first annular electrode 5 is narrow. For example, the top surface width of the first annular electrode 5 is 8 mm, the bottom surface width is 4 mm, and the height gradually increases from the edge to the center, the edge height is 1 mm, and the center height is 5 mm. During adsorption, the top surface of the first annular electrode 5 contacts the object to be measured. The design of a wider top surface and a thinner edge makes the electrode softer when contacting the object to be measured, and can better adapt to the slight unevenness of the surface, ensuring good electrical contact. Of course, the wider top surface of the first annular electrode 5 is also more conducive to shielding the noise transmitted to the second annular electrode 6 along the surface of the object.

[0030] Preferably, when used, a second wire is used to pass through the flexible suction cup 2 and connect to the second annular electrode 6. In this way, the first annular electrode signal V1(t) and the second annular electrode signal V2(t) are collected. A low-noise preamplifier is used to amplify V1(t) and V2(t) respectively, and then the amplified signals V1(t) and V2(t) are filtered and band-pass filtered to remove high-frequency noise and unnecessary frequency components. Then, the filtered signal is input into a differential amplifier to calculate the differential signal V d (t): V d (t) =V1(t) - V2(t). By analyzing the differential signal V d The root mean square value (RMS) of (t) is used to determine the strength of the noise signal. The calculation method of RMS is: Where T is the period. If V d The RMS value of (t) is large, indicating that the noise interference is strong; if V d The RMS value of (t) is small, indicating that the noise interference is weak. A more stable and accurate voltage signal V is extracted through the weighted average algorithm. avg (t): V avg (t) =αV1(t) + βV2(t), where α and β are weight coefficients, satisfying α + β = 1. The weight coefficients are dynamically adjusted according to the noise level of the signal, where According to the differential signal V d (t) Perform noise correction and compensation. The corrected signal V corr (t) is: V corr (t) = V avg (t) – kV d (t), Where k is the compensation coefficient, which is adjusted according to the actual noise level and system characteristics.

[0031] In summary, the present invention provides a negative pressure suction cup voltage signal measuring device. The advantage of this device is that, through the flexible suction cup 2 and the negative pressure adsorption structure, the electrode can be more stably attached to the surface of the object to be measured, avoiding the measurement error caused by poor contact, vibration and environmental interference in the traditional method. At the same time, the setting of the annular electrode further optimizes the signal acquisition and interference shielding effect, making the measurement result more reliable and accurate.

[0032] The flexible suction cup voltage signal measuring device is not only suitable for medical monitoring, but also can be widely used in industrial automation, environmental monitoring, scientific research and other fields. In medical monitoring, it can be used for high-precision measurement of bioelectric signals such as electrocardiogram, electroencephalogram and electromyogram to improve the accuracy and reliability of diagnosis. In industrial automation, it can be used for monitoring the operating status of equipment and fault diagnosis to improve the safety and efficiency of the production process. In environmental monitoring, it can be used to monitor parameters such as atmospheric electric field and electromagnetic radiation, and provide accurate environmental data to support environmental protection.

[0033] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A negative pressure suction cup voltage signal measuring device, characterized in that: It includes a cavity, a flexible suction cup, a conducting tube, an elastic cavity, a first annular electrode, and a second annular electrode. The edge of the flexible suction cup is fixed to the edge of the bottom of the cavity. In a natural state, the flexible suction cup is recessed into the cavity. An opening is provided in the center of the flexible suction cup. The opening is connected to the elastic cavity through the conducting tube. The conducting tube can movably pass through the top of the cavity. The first annular electrode and the second annular electrode are arranged on the outer side of the cavity on the flexible suction cup. The first annular electrode is located on the side close to the edge of the cavity, and the second annular electrode is located on the side close to the center of the flexible suction cup. The first annular electrode and the second annular electrode are not in contact. When used, a first wire passes through the flexible suction cup, one end of the first wire is electrically connected to the second annular electrode, and the other end of the first wire is used for signal output, squeezing the elastic cavity to form a negative pressure in the elastic cavity, and the flexible suction cup is adsorbed on the surface of the object to be measured, and the first annular electrode and the second annular electrode are tightly attached to the surface of the object to be measured.

2. The negative pressure suction cup voltage signal measuring device according to claim 1, characterized in that: The material of the cavity is low carbon steel.

3. The negative pressure suction cup voltage signal measuring device according to claim 1, characterized in that: The material of the conducting tube is stainless steel.

4. The negative pressure suction cup voltage signal measuring device according to claim 1, characterized in that: The elastic cavity and the flexible suction cup are made of rubber.

5. The negative pressure suction cup voltage signal measuring device according to claim 1, characterized in that: The cross section of the first annular electrode extends to the other side of the flexible suction cup.

6. The negative pressure suction cup voltage signal measuring device according to claim 1, characterized in that: The material of the first annular electrode is conductive rubber, and the material of the second annular electrode is silver / silver chloride.

7. The negative pressure suction cup voltage signal measuring device according to claim 6, characterized in that: The thickness of the first annular electrode is small on a side close to the edge of the cavity; the thickness of the first annular electrode is large on a side close to the center of the flexible suction cup.

8. The negative pressure suction cup voltage signal measuring device according to claim 1, characterized in that: The top surface of the first annular electrode is wide, and the bottom surface of the first annular electrode is narrow.

9. The negative pressure suction cup voltage signal measuring device according to any one of claims 1 to 8, characterized in that: The conducting tube outside the cavity is marked with scale.

10. The negative pressure suction cup voltage signal measuring device according to claim 9, characterized in that: When used, a second wire is used to penetrate the flexible suction cup and connect to the first annular electrode.

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