Electrostatic potential measuring device with collector plate

Abstract

The application relates to a static electric potential measuring device with a collecting plate, which comprises a static electric collecting plate, a one-way charge valve, a collecting plate, a static electric induction probe and a static electric potential meter, collects a charge signal through the static electric collecting plate, and electrically connects the static electric collecting plate with the collecting plate through the one-way charge valve; the collecting plate is used for accumulating the received charge signal; when the static electric potential is low, the static electric charge from the static electric collecting plate is collected through the collecting plate; the static electric charge of the static electric collecting plate is accumulated due to the effect of the one-way charge valve and the accumulation of the charge signal, until the trigger potential is reached; the static electric induction probe senses the charge signal on the collecting plate; and the static electric potential meter is used for determining the static electric potential of the present measuring point; the static electric potential measuring device with the collecting plate can improve the detection capability of the static electric potential and improve the measurement precision of the static electric potential.

Description

Technical Field

[0001] This invention relates to an electrostatic potential measuring device with a current collector. Background Technology

[0002] The phenomenon of tiny and unevenly distributed electrostatic potentials generated by dilute phase fine solid particles during pipeline transportation. During transportation, friction between particles and between particles and the inner surface of the pipeline causes static electricity to form on the surface of the fine solid particles. Different substances, different transportation concentrations, different transportation speeds, particle temperature and humidity all result in different electrostatic potentials. Of course, the uneven distribution of these solid particles in the transportation pipeline also leads to different electrostatic potential distributions in different parts of the pipeline. Accurately measuring the electrostatic potential values ​​at these different locations is of great significance for understanding the flow state of solid particles in the pipeline.

[0003] Currently, common electrostatic potential measurement devices include insertion-type and ring-type devices. Insertion-type devices only measure the electrostatic potential around the probe; while ring-type devices only receive the strongest electrostatic induction at the point of contact within the pipe, masking the lower electrostatic potentials at other points on the ring. This results in an inaccurate representation of the electrostatic potential distribution and lower measurement accuracy. More importantly, temperature and humidity significantly affect electrostatic potential. If the solid particles are at low temperatures or have high moisture content (high humidity), the electrostatic potential at the measurement point will be too low, causing the measurement system to malfunction and resulting in inaccurate measurements. Summary of the Invention

[0004] This invention provides an electrostatic potential measuring device with a current collector to solve the technical problem of low measurement accuracy in existing electrostatic potential measuring devices.

[0005] The present invention adopts the following technical solution:

[0006] An electrostatic potential measuring device with a current collector includes an electrostatic acquisition plate, a one-way charge valve, a current collector, an electrostatic induction probe, and an electrostatic potentiometer. The electrostatic acquisition plate is electrically connected to the electrical signal input terminal of the one-way charge valve, and the electrical signal output terminal of the one-way charge valve is electrically connected to the current collector. The current collector is used to accumulate the received charge signals. The electrostatic induction probe is spaced apart from the current collector and is used to sense the charge signals on the current collector. The electrical signal output terminal of the electrostatic induction probe is electrically connected to the electrostatic potentiometer.

[0007] Furthermore, the current collector board includes a current collector layer sub-board, a current application layer sub-board, and an adder circuit layer sub-board arranged sequentially from top to bottom. The current collector layer sub-board is used to receive charge signals, the current application layer sub-board is used to apply a preset fixed voltage signal, and the adder circuit layer sub-board is used to add the charge signal received by the current collector layer sub-board and the fixed voltage signal applied by the current application layer sub-board.

[0008] Furthermore, insulating plates are provided between the current collector sub-board and the current application sub-board, as well as between the current application sub-board and the addition circuit sub-board.

[0009] Furthermore, the electrostatic acquisition board includes a first cross-sectional electrostatic acquisition sub-board, a first signal electrostatic acquisition sub-board, a second cross-sectional electrostatic acquisition sub-board, a second signal electrostatic acquisition sub-board, and a third cross-sectional electrostatic acquisition sub-board arranged sequentially at intervals and of equal length. The width of the first cross-sectional electrostatic acquisition sub-board, the second cross-sectional electrostatic acquisition sub-board, and the third cross-sectional electrostatic acquisition sub-board is equal to a preset first width threshold. The width of the first signal electrostatic acquisition sub-board is equal to a second width threshold. The width of the second signal electrostatic acquisition sub-board is equal to a third width threshold. The first width threshold is less than the third width threshold, and the third width threshold is less than the second width threshold.

[0010] Furthermore, the first cross-section electrostatic acquisition sub-board, the first signal electrostatic acquisition sub-board, the second cross-section electrostatic acquisition sub-board, the second signal electrostatic acquisition sub-board, and the third cross-section electrostatic acquisition sub-board are all arc-shaped boards.

[0011] Furthermore, insulating material is provided between adjacent sub-boards.

[0012] Furthermore, the unidirectional charge valve is a diode or is composed of at least two diodes connected in series.

[0013] The beneficial effects of this invention include: by collecting charge signals through an electrostatic collection plate, and under the action of a one-way charge valve, not only can unidirectional charge flow be achieved, but also conduction is only activated when the charge potential reaches a corresponding level. The collector plate is used to accumulate the received charge signals. When the electrostatic potential is low, the collector plate collects the electrostatic charge from the electrostatic collection plate. Due to the action of the one-way charge valve and the accumulation of charge signals, the electrostatic charge on the electrostatic collection plate is accumulated until the trigger potential is reached. The electrostatic induction probe senses the charge signal on the collector plate, and the electrostatic potential at the current measurement point is determined by an electrostatic potentiometer. The electrostatic potential measuring device with a collector plate provided by this invention can improve the detection capability of electrostatic potential and enhance the measurement accuracy of electrostatic potential. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below:

[0015] Figure 1 This is a schematic diagram of the composition structure of an electrostatic potential measuring device with a current collector provided in an embodiment of this application;

[0016] Figure 2 This is a schematic diagram of the electrostatic discharge collection board;

[0017] Figure 3 This is a schematic diagram of the current collector plate;

[0018] Figure 4 This is the addition circuit diagram in the current collector board;

[0019] Figure 5 This is a schematic diagram of the internal structure of an electrostatic potential measuring device with a current collector provided in an embodiment of this application;

[0020] Among them, 1 is the electrostatic acquisition board, 2 is the one-way charge valve, 3 is the collector board, 4 is the electrostatic induction probe, 5 is the electrostatic potentiometer, 6 is the device housing, 7 is the acquisition board adjustment block, 8 is the collector board positioning block, 9 is the collector board gap adjustment screw, 10 is the acquisition board positioning block, 11 is the acquisition board fixing bolt, 12 is the insulating filler, 13 is the terminal block, 101 is the first cross-section type electrostatic acquisition sub-board, 102 is the first signal electrostatic acquisition sub-board, 103 is the second cross-section type electrostatic acquisition sub-board, 104 is the second signal electrostatic acquisition sub-board, 105 is the third cross-section type electrostatic acquisition sub-board, 106 is the insulating material, 301 is the collector layer sub-board, 302 is the power-on layer sub-board, 303 is the addition circuit layer sub-board, and 304 is the insulating board. Detailed Implementation

[0021] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0022] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0023] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0024] As used in this application specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if detected [the described condition or event]" may be interpreted, depending on the context, as meaning "once determined," "in response to determination," "once detected [the described condition or event]," or "in response to detection [the described condition or event]."

[0025] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0027] To illustrate the technical solution described in this application, specific embodiments will be described below.

[0028] like Figure 1 As shown, the electrostatic potential measuring device with a current collector provided in this embodiment includes an electrostatic acquisition plate 1, a one-way charge valve 2, a current collector 3, an electrostatic induction probe 4, and an electrostatic potentiometer 5.

[0029] The electrostatic sampling plate 1 is used to collect electrostatic information, i.e., charge information, at the measurement point location (such as a conveying pipeline). The area of ​​the electrostatic sampling plate 1 can be set according to actual measurement needs, and the electrostatic sampling plate 1 can be a straight plate or an arc-shaped plate. The electrostatic sampling plate 1 can be a conventional sampling plate mechanism for collecting charges. As a specific implementation, for example... Figure 2As shown, the electrostatic acquisition board 1 includes a first cross-sectional electrostatic acquisition sub-board 101, a first signal electrostatic acquisition sub-board 102, a second cross-sectional electrostatic acquisition sub-board 103, a second signal electrostatic acquisition sub-board 104, and a third cross-sectional electrostatic acquisition sub-board 105 arranged sequentially at intervals. The first cross-sectional electrostatic acquisition sub-board 101, the first signal electrostatic acquisition sub-board 102, the second cross-sectional electrostatic acquisition sub-board 103, the second signal electrostatic acquisition sub-board 104, and the third cross-sectional electrostatic acquisition sub-board 105 have the same length. The first cross-sectional electrostatic acquisition sub-board 101, the first signal electrostatic acquisition sub-board 102, the second cross-sectional electrostatic acquisition sub-board 103, the second signal electrostatic acquisition sub-board 104, and the third cross-sectional electrostatic acquisition sub-board 105 can all be straight boards (i.e., rectangular boards) or they can all be curved boards. This embodiment uses curved boards as an example for explanation. Furthermore, an insulating material 106 (specifically, a high-temperature resistant insulating material, such as thermoplastic resin) is provided between adjacent sub-boards. The spacing between adjacent sub-boards is set according to actual needs, that is, the width of the insulating material 106 between adjacent sub-boards is set according to actual needs.

[0030] In this embodiment, the first cross-sectional electrostatic acquisition sub-plate 101, the second cross-sectional electrostatic acquisition sub-plate 103, and the third cross-sectional electrostatic acquisition sub-plate 105 are all cross-sectional electrostatic acquisition plates, i.e., electrostatic acquisition plates with very narrow widths. In this embodiment, the first cross-sectional electrostatic acquisition sub-plate 101, the second cross-sectional electrostatic acquisition sub-plate 103, and the third cross-sectional electrostatic acquisition sub-plate 105 are three identical plates, and the width of each of them is equal to a preset first width threshold, which is a relatively small value. The first cross-sectional electrostatic acquisition sub-plate 101, the second cross-sectional electrostatic acquisition sub-plate 103, and the third cross-sectional electrostatic acquisition sub-plate 105 are used to quickly acquire the electrostatic potential of particles at the measurement location, and are combined into a circular cross-section through uniform distribution on the circumference. Through grid calculation, the electrostatic potential distribution map of this cross-section can be accurately located. The flow state of the particles can be understood through the acquired potentials of these three cross-sections.

[0031] The width of the first signal electrostatic acquisition sub-board 102 is equal to the second width threshold, and the width of the second signal electrostatic acquisition sub-board 104 is equal to the third width threshold. The first width threshold is less than the third width threshold, and the third width threshold is less than the second width threshold. That is, the first signal electrostatic acquisition sub-board 102 is the widest, i.e., has the largest area; the second signal electrostatic acquisition sub-board 104 is next; and the first cross-section electrostatic acquisition sub-board 101, the second cross-section electrostatic acquisition sub-board 103, and the third cross-section electrostatic acquisition sub-board 105 are the narrowest, i.e., have the smallest areas. The specific width of each sub-board is set according to actual needs.

[0032] The first signal electrostatic acquisition sub-board 102 can be called the "low-signal electrostatic acquisition sub-board," and the second signal electrostatic acquisition sub-board 104 can be called the "high-signal electrostatic acquisition sub-board," depending on the function of the two boards. When the acquired electrostatic potential is low, using a larger acquisition board (i.e., the first signal electrostatic acquisition sub-board 102) can acquire more electrostatic signals. When the acquired electrostatic potential is high, using a smaller acquisition board (i.e., the second signal electrostatic acquisition sub-board 104) can acquire electrostatic signals quickly, improving the response speed. In short, using high and low signal electrostatic acquisition boards is to make the measurement range of the electrostatic potentiometer 5 wider and improve the detection accuracy. In addition, by combining them along the circumference of the pipe, the distribution model of the electrostatic potential concentration within the pipe section (within the enclosed cylinder) can be detected.

[0033] The one-way charge valve 2 is used to achieve unidirectional charge conduction. In this embodiment, the one-way charge valve 2 can be a diode, or it can be composed of at least two diodes connected in series. As a specific implementation, the one-way charge valve 2 can be configured as a switching type high-speed diode package circuit, which utilizes the unidirectional conductivity of semiconductor diodes, that is, electrostatic charge can flow unidirectionally from the electrostatic collection plate 1 to the collector plate 3 and accumulate on the collector plate 3.

[0034] The electrostatic acquisition board 1 is electrically connected to the electrical signal input terminal of the one-way charge valve 2 (specifically, the first cross-section electrostatic acquisition sub-board 101, the first signal electrostatic acquisition sub-board 102, the second cross-section electrostatic acquisition sub-board 103, the second signal electrostatic acquisition sub-board 104, and the third cross-section electrostatic acquisition sub-board 105 are all electrically connected to the electrical signal input terminal of the one-way charge valve 2), and the electrical signal output terminal of the one-way charge valve 2 is electrically connected to the collector board 3. Taking the one-way charge valve 2 as a diode as an example, the electrostatic acquisition board 1 is electrically connected to the anode of the diode, and the cathode of the diode is electrically connected to the collector board 3.

[0035] The collector plate 3 is used to accumulate the received charge signals. In this embodiment, for example... Figure 3 As shown, the current collector 3 includes a current collector sub-board 301, a current-applying sub-board 302, and an adder circuit sub-board 303, arranged sequentially from top to bottom. The electrical signal output terminal of the one-way charge valve 2 is specifically electrically connected to the current collector sub-board 301. The spacing between the current collector sub-board 301 and the current-applying sub-board 302, and the spacing between the current-applying sub-board 302 and the adder circuit sub-board 303, are set according to actual needs. Furthermore, insulating plates 304 are provided between the current collector sub-board 301 and the current-applying sub-board 302, and between the current-applying sub-board 302 and the adder circuit sub-board 303. The insulating plates 304 can also be made of conventional high-temperature resistant insulating materials, such as thermoplastic resin.

[0036] The collector layer sub-board 301 is used to receive charge signals and accumulate the charge of the electrostatic acquisition board 1 onto the collector layer sub-board 301, forming a voltage signal U1. The power application layer sub-board 302 is used to apply a preset fixed voltage signal U2 onto the power application layer sub-board 302. The fixed voltage signal U2 is set according to actual needs. The addition circuit layer sub-board 303 is equipped with an addition circuit, which is used to add the charge signal received by the collector layer sub-board 301 and the fixed voltage signal applied by the power application layer sub-board 302 to obtain a high-point superimposed potential, which is output to the electrostatic induction probe 4.

[0037] like Figure 4 As shown, the addition circuit is set in the addition circuit layer sub-board 303. One end of resistor R1 is connected to voltage signal U1, that is, connected to collector layer sub-board 301. One end of resistor R2 is connected to fixed voltage signal U2, that is, connected to power layer sub-board 302. The addition operation is realized under the action of operational amplifier U1, resistor RP (three resistors RP are set in this embodiment) and resistor RF. The output signal of operational amplifier U1 is U3, that is, the potential signal after addition, which is output to electrostatic induction probe 4.

[0038] The electrostatic induction probe 4 is spaced apart from the current collector 3 to sense the charge signal U3 on the current collector 3. The distance between the electrostatic induction probe 4 and the current collector 3 is set according to actual needs, while ensuring that the electrostatic induction probe 4 can reliably sense the charge signal. It should be understood that the distance between the electrostatic induction probe 4 and the current collector 3 should not be too far.

[0039] The electrostatic induction probe 4 is a conventional induction probe used to sense charge signals. In this embodiment, the electrostatic induction probe 4 is an adjustable trigger voltage electrostatic induction probe 4. The electrical signal output terminal of the electrostatic induction probe 4 is electrically connected to the electrostatic potentiometer 5. The electrostatic potentiometer 5 is a conventional instrument used to detect the intensity of electrostatic charge. The electrostatic potentiometer 5 detects the intensity of the charge signal sensed by the electrostatic induction probe 4.

[0040] Therefore, the collector plate 3 is specifically a collector plate with an addition circuit. The reason for setting up the addition circuit is that when measuring electrostatic potential, a relatively low electrostatic potential signal may be encountered. Once the electrostatic potential signal is lower than the minimum value of the measurement range of the electrostatic induction probe 4, the actual measured electrostatic potential value will be zero, and it will be impossible to measure the relatively low electrostatic potential signal. Such situations are frequently encountered in practical applications. Therefore, by accumulating the low potential signal and superimposing a fixed high potential, the potential on the collector plate 3 increases over time. When the electrostatic potential on the collector plate 3 reaches the minimum value of the measurement range of the electrostatic induction probe 4, the measurement of the electrostatic induction probe 4 can be triggered. The electrostatic potentiometer 5 can calculate the actual electrostatic potential data received on the electrostatic acquisition plate 1 based on the trigger potential interval time, thereby improving the measurement range and accuracy.

[0041] like Figure 5 As shown in the figure, this application provides a specific internal structure diagram of an electrostatic potential measuring device with a collector plate. In the diagram, 6 is the device housing, 7 is the acquisition plate adjustment block, 8 is the collector plate positioning block, 9 is the collector plate gap adjustment screw, 10 is the acquisition plate positioning block, 11 is the acquisition plate fixing bolt, 12 is the insulating filler, and 13 is the terminal block.

[0042] In practical applications, the electrostatic potential measuring device with a current collector provided in this embodiment can be arranged in a spatial ring-shaped arrangement, that is, four electrostatic potential measuring devices are evenly arranged along the circumference. This can accurately measure the charge distribution of fine powder particles in the pipeline, thereby obtaining the distribution of powder particles along the cross section in real time.

[0043] This embodiment provides an electrostatic potential measuring device with a current collector that solves the problem of inaccurate electrostatic potential measurement caused by uneven distribution of micro-solid particles in the conveying pipeline during dilute phase transport of micro-solid particles; it also addresses the issue of low potentials that cannot be measured by ordinary electrostatic potentiometers due to excessively low particle concentrations during dilute phase transport of micro-solid particles, allowing the device to measure particle concentrations below 50 g / m³; and it improves the detection capability by addressing the low potentials that cannot be measured by ordinary electrostatic potentiometers due to low particle temperature (below 65°C) or high particle moisture content (greater than 15%) during dilute phase transport of micro-solid particles, which reduces the ability of the particle surface to carry static charge. The device can measure particle temperatures as low as 50°C and particle moisture contents as high as 35% during dilute phase transport of micro-solid particles. Furthermore, by adding a current collector plate 3 and an electrostatic induction probe 4, and setting a minimum sensing potential for the electrostatic induction probe 4, the induction probe signal is triggered only when the potential of the current collector plate 3 reaches the set potential of the electrostatic induction probe 4. When the electrostatic potential is low, the current collector plate 3 collects the electrostatic charge from the electrostatic acquisition plate 1 until the trigger potential is reached, and the electrostatic potential at the current measurement point is determined by the accumulation time. This improves the detection capability of the device. In addition, the device can be spatially distributed in the designed parts of the conveying pipeline to accurately measure the particle conveying status of the pipeline.

[0044] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. An electrostatic potential measuring device with a current collector, characterized in that, The device includes an electrostatic acquisition board, a one-way charge valve, a current collector, an electrostatic induction probe, and an electrostatic potentiometer. The electrostatic acquisition board is electrically connected to the electrical signal input terminal of the one-way charge valve, and the electrical signal output terminal of the one-way charge valve is electrically connected to the current collector. The current collector is used to accumulate the received charge signals. The electrostatic induction probe is spaced apart from the current collector and is used to sense the charge signals on the current collector. The electrical signal output terminal of the electrostatic induction probe is electrically connected to the electrostatic potentiometer. The current collector board includes a current collector layer sub-board, a current application layer sub-board, and an adder circuit layer sub-board arranged sequentially from top to bottom. The current collector layer sub-board is used to receive charge signals, the current application layer sub-board is used to apply a preset fixed voltage signal, and the adder circuit layer sub-board is used to add the charge signal received by the current collector layer sub-board and the fixed voltage signal applied by the current application layer sub-board. An insulating plate is provided between the current collector sub-board and the current applying sub-board, and between the current applying sub-board and the addition circuit sub-board; the insulating plate is made of thermoplastic resin.

2. The electrostatic potential measuring device with a current collector according to claim 1, characterized in that, The electrostatic acquisition board includes a first cross-sectional electrostatic acquisition sub-board, a first signal electrostatic acquisition sub-board, a second cross-sectional electrostatic acquisition sub-board, a second signal electrostatic acquisition sub-board, and a third cross-sectional electrostatic acquisition sub-board arranged at intervals of equal length. The width of the first cross-sectional electrostatic acquisition sub-board, the second cross-sectional electrostatic acquisition sub-board, and the third cross-sectional electrostatic acquisition sub-board is equal to a preset first width threshold. The width of the first signal electrostatic acquisition sub-board is equal to a second width threshold. The width of the second signal electrostatic acquisition sub-board is equal to a third width threshold. The first width threshold is less than the third width threshold, and the third width threshold is less than the second width threshold.

3. The electrostatic potential measuring device with a current collector according to claim 2, characterized in that, The first cross-section electrostatic acquisition sub-board, the first signal electrostatic acquisition sub-board, the second cross-section electrostatic acquisition sub-board, the second signal electrostatic acquisition sub-board, and the third cross-section electrostatic acquisition sub-board are all arc-shaped boards.

4. The electrostatic potential measuring device with a current collector according to claim 2, characterized in that, Insulating material is installed between adjacent sub-boards.

5. The electrostatic potential measuring device with a current collector according to claim 1, characterized in that, The unidirectional charge valve is a diode or is composed of at least two diodes connected in series.

Images