Ceramic part dielectric constant stability measuring device

Abstract

The utility model discloses a ceramic part dielectric constant stability measuring device which comprises a panel, a ceramic block to be measured, a pole piece, a first fixing plate, a second fixing plate, a bottom plate, a wire outlet groove, an insulating spacer and an insulating fixing piece. The dielectric constant of a certain batch of ceramic parts can be rapidly measured by replacing the to-be-measured ceramic block, the production cost is low, the operation is convenient, the test cost of the dielectric constant stability of the ceramic parts is reduced, and the method can be widely applied to the technical field of measurement of electrical characteristics of parts.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electrical characteristic measurement of spare parts, especially relates to a ceramic spare part dielectric constant stability measuring device. BACKGROUND

[0002] Dielectric constant refers to the ratio of the capacitance of the same substance as the dielectric and vacuum in the same capacitor, and is the main parameter reflecting the relative ability of the dielectric to store static electricity in the electric field, and its value represents the relative ability of the dielectric to store static electricity in the electric field. Substances with high dielectric constant have high ion separation ability and strong solvation ability.

[0003] In the point type probe of the capacitive sensor, ceramic is usually selected as the insulator of the two electrode plates and the dielectric layer between the two electrode plates. According to the basic principle of flat plate capacitor:

[0004]

[0005] Among them, k is the dielectric constant of the medium, C is the capacitance value of the capacitor, A is the effective area of the electrode plate, and d is the distance between the two electrode plates. Therefore, in the point type probe of the capacitive sensor, the dielectric constant k value of the ceramic has a direct impact on the capacitance value of the probe.

[0006] In the batch production process of the capacitive sensor point type probe, the size precision and assembly precision of each spare part need to be ensured to ensure the consistency of the capacitive probe quality. However, in the actual production process, due to the influence of raw material purity, manufacturing process and environmental factors, there may be great difference in the dielectric constant between ceramic blocks of the same size, resulting in poor consistency between capacitive probes and failing to meet the sensitivity requirements of scientific experiments.

[0007] The current instrument for measuring the dielectric constant of a substance is mainly a dielectric constant measuring instrument. Its working principle is to measure the dielectric constant of the medium by high frequency resonance method. After the measured medium is inserted into the resonance loop, the resonance frequency and quality factor of the loop will change accordingly. The operation of frequency setting, resonance frequency search, range adjustment and data processing is completed by the built-in single-chip microcomputer of the instrument, so as to complete the measurement of the dielectric constant of the measured medium.

[0008] However, the common dielectric constant measuring instrument has requirements for the shape of the measured medium, which usually requires the measured medium to be a solid flat plate, while the ceramic block as the insulating medium of the capacitive probe is usually a hollow cylindrical special shape. At the same time, the existing dielectric constant measuring instrument also has the problems of complex structure, high production cost, complicated operation process and unsuitability for large-scale detection. UTILITY MODEL CONTENTS

[0009] The utility model discloses a purpose lies in at least one of the technical problems existing in the prior art is solved to some extent.

[0010] Therefore, one purpose of the utility model embodiment is to provide a kind of ceramic parts dielectric constant stability measuring device, adopt the structure of the detachable design of stratification imitates electric capacity probe, the dielectric constant of the way of replacing ceramic block can be measured quickly in certain batch ceramic parts, production cost is low, it is convenient to operate, and the test cost of ceramic parts dielectric constant stability is reduced.

[0011] The first technical scheme adopted by the utility model is:

[0012] A kind of ceramic parts dielectric constant stability measuring device, it is characterized in that, including panel, to be measured ceramic block, pole piece, first fixed plate, second fixed plate, bottom plate, outlet slot, insulating gasket and insulating fixed sheet, the first fixed plate is located on the bottom plate, the second fixed plate is located on the first fixed plate, the panel is located on the second fixed plate, the outlet slot is located in the bottom plate, the insulating gasket is set on the bottom plate, the center opening of the insulating gasket is communicated with the outlet slot, the pole piece and the insulating fixed sheet are all set on the insulating gasket, the insulating fixed sheet is sleeved on the bottom of the pole piece, the first fixed plate is sleeved on the outside of the insulating gasket and the insulating fixed sheet, the to be measured ceramic block is detachably connected with the top of the pole piece, the second fixed plate is detachably connected with the to be measured ceramic block, the panel is detachably connected with the second fixed plate.

[0013] Further, the lower surface of the pole piece is welded with wire, and the wire is connected with the outside through the center opening of the insulating gasket and the outlet slot.

[0014] Further, the shape of the insulating fixed sheet is adapted to the bottom of the pole piece, and the insulating fixed sheet is used for fixing the pole piece.

[0015] Further, the shape of the insulating gasket, the shape of the insulating fixed sheet and the shape of the to be measured ceramic block are all adapted to the shape of the first fixed plate, and a gap is left between the first fixed plate and the top of the pole piece, the bottom of the to be measured ceramic block is embedded in the gap between the first fixed plate and the top of the pole piece, and the first fixed plate is used for fixing the insulating gasket, the insulating fixed sheet and the to be measured ceramic block.

[0016] Further, the shape of the first fixed plate is adapted to the shape of the second fixed plate.

[0017] Further, the second fixing plate is in shape adapted to the shape of the ceramic block to be measured, and the second fixing plate is sleeved on the top of the ceramic block to be measured, and the second fixing plate is used for fixing the ceramic block to be measured.

[0018] Further, the device further comprises a rubber pad arranged on the lower surface of the panel.

[0019] Further, the second fixing plate is in shape adapted to the shape of the panel.

[0020] The utility model discloses the beneficial effect is: the utility model discloses through the detachable design of layering imitates the structure of capacitance probe, and the pole piece in tooling is as one pole of capacitor, and the panel, bottom plate, first fixed plate and second fixed plate are as another pole of capacitor, and rubber pad, ceramic block, insulating gasket and insulating fixed sheet are as the insulating medium of capacitor, and the capacitance value of tooling is measured under the condition that only ceramic block is replaced, thereby realizing the dielectric constant stability of quick measurement of certain batch ceramic parts, and the production cost is low, and the operation is convenient, and the test cost of ceramic parts dielectric constant stability is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A ceramic parts dielectric constant stability measurement device provided by the utility model embodiment is shown in the cross section view;

[0022] Figure 2 A ceramic block to be measured provided by the utility model embodiment is shown in the structural view;

[0023] Figure 3 A ceramic parts dielectric constant stability measurement device provided by the utility model embodiment is shown in the cross section view before installing the ceramic block to be measured;

[0024] Figure 4 A ceramic parts dielectric constant stability measurement device provided by the utility model embodiment is shown in the structural view before installing the ceramic block to be measured;

[0025] Figure 5 A ceramic parts dielectric constant stability measurement device provided by the utility model embodiment is shown in the cross section view after installing the ceramic block to be measured;

[0026] Figure 6 A ceramic parts dielectric constant stability measurement device provided by the utility model embodiment is shown in the structural view after installing the ceramic block to be measured;

[0027] Figure 7 A ceramic parts dielectric constant stability measurement device provided by the utility model embodiment is shown in the cross section view after installing the ceramic block to be measured, second fixed plate, rubber pad and panel;

[0028] Figure 8 The structural schematic diagram after the ceramic block to be measured, the second fixing plate, the rubber pad and the panel are installed in the ceramic part dielectric constant stability measuring device provided by the embodiment of the present application;

[0029] Figure 9 The test data curve graph of the ceramic block to be measured and the corresponding capacitance value provided by the embodiment of the present application. DETAILED DESCRIPTION

[0030] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application. For the step numbers in the following embodiments, they are only set for the convenience of description and explanation, and the order between the steps is not limited in any way, and the execution order of each step in the embodiments can be adaptively adjusted according to the understanding of those skilled in the art.

[0031] In the description of the present application, the meaning of multiple is two or more than two, and if it is described as first, second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features. In addition, unless otherwise defined,

[0032] All technical and scientific terms used herein have the same meaning as understood by those skilled in the art.

[0033] Figure 1 The cross-sectional schematic view of the ceramic part dielectric constant stability measuring device provided by the embodiment of the present application, with reference to Figure 1 The embodiment of the present application provides a ceramic part dielectric constant stability measuring device, which is characterized by comprising a panel, a pole piece, a first fixing plate, a second fixing plate, a bottom plate, a wire outlet groove, an insulating gasket and an insulating fixing piece, the first fixing plate is located above the bottom plate, the second fixing plate is located above the first fixing plate, the panel is located above the second fixing plate, the wire outlet groove is located in the bottom plate, the insulating gasket is arranged on the bottom plate, the center opening of the insulating gasket is communicated with the wire outlet groove, the pole piece and the insulating fixing piece are both arranged on the insulating gasket, the insulating fixing piece is sleeved on the bottom of the pole piece, the first fixing plate is sleeved on the outside of the insulating gasket and the insulating fixing piece, the ceramic block to be measured is detachably connected with the top of the pole piece, the second fixing plate is detachably connected with the ceramic block to be measured, and the panel is detachably connected with the second fixing plate.

[0034] Specifically, Figure 1The utility model provides a kind of ceramic parts dielectric constant stability measuring device's section view schematic diagram provided for the embodiment of the utility model, in the embodiment, the connecting relationship of each component is as shown in Figure 1 As shown in the following: 1: panel, 2: rubber pad, 3: to be measured ceramic block, 4: pole piece, 5: second fixed plate, 6: first fixed plate, 7: bottom plate 8: outlet slot, 9: insulating gasket, 10: insulating fixed piece, 11: wire.

[0035] Referring Figure 1 The working principle of the embodiment is: in the embodiment, pole piece, panel, bottom plate, first fixed plate, second fixed plate, rubber pad, to be measured ceramic block, insulating gasket and insulating fixed piece jointly constitute a capacitor, wherein pole piece is one pole of the capacitor, panel, bottom plate, first fixed plate and second fixed plate are the other pole of the capacitor, rubber pad, to be measured ceramic block, insulating gasket and insulating fixed piece are the insulating medium of the capacitor, in the case where keeping external environment unchanged, only replacing to be measured ceramic block in tooling, the difference between the dielectric constant between different to be measured ceramic blocks will become the only factor causing the change of the capacitor capacitance value, therefore, if it is necessary to judge the dielectric constant stability of to be measured ceramic block of a production batch, only to be measured ceramic block is replaced continuously, the corresponding capacitor capacitance value is measured, when the capacitor capacitance value corresponding to a certain to be measured ceramic block is greatly different from the capacitor capacitance value of other to be measured ceramic blocks, the to be measured ceramic block can be removed, and the dielectric constant stability of to be measured ceramic block of the batch is quickly measured, without the need for accurate measurement of the dielectric constant of a single to be measured ceramic block.

[0036] In the embodiment, the functions of each component are as follows: the bottom plate is the lower support component of the tooling, the insulating gasket is mainly used to ensure the electrical insulation between the pole piece and the bottom plate, the outlet slot is provided in the bottom plate, the wire can pass through the center opening of the insulating gasket via the outlet slot, is welded to the bottom of the pole piece, connects the pole piece and the external capacitor transmitter, the insulating fixed piece is mainly used to ensure the electrical insulation between the pole piece and the first fixed plate, and also provides support and fixing functions for the lower part of the pole piece, to prevent measurement instability caused by factors such as vibration, the shape of the first fixed plate is adapted to the shape of the insulating gasket, the shape of the insulating fixed piece and the shape of the to be measured ceramic block, to provide support for them, the bottom of the to be measured ceramic block can be embedded in the gap between the top of the pole piece and the first fixed plate, the structure of the to be measured ceramic block is as shown in Figure 2 The second fixed plate is located above the first fixed plate, to further fix the to be measured ceramic block, the rubber pad is located on the lower surface of the panel, to play the roles of buffering, sealing and insulation, the panel can be covered on the first fixed plate, to play the roles of fixing and ensuring the closed structure of the device.

[0037] The working process of the embodiment is as follows: Figure 3A tool sectional view when the ceramic block to be tested is not installed in the embodiment, Figure 4 A tool schematic view when the ceramic block to be tested is not installed in the embodiment, it can be seen that there is a gap between the first fixed plate and the top of the pole piece, which is matched with the bottom structure of the ceramic block to be tested, and the bottom of the ceramic block to be tested can be embedded in the gap. Figure 5 A tool sectional view after the ceramic block to be tested is installed in the embodiment, Figure 6 A tool schematic view after the ceramic block to be tested is installed in the embodiment, the ceramic block to be tested is a hollow white special-shaped cylindrical structure and can be sleeved to the outside of the pole piece. After the ceramic block to be tested is installed, the second fixed plate is used to fix the ceramic block to be tested, and the panel is covered above the ceramic block to be tested and the second fixed plate to complete the assembly of the embodiment. The assembled tool is as shown in Figure 7 and Figure 8 , Figure 6 A tool sectional view after the ceramic block to be tested, the second fixed plate, the rubber pad and the panel are installed in the embodiment, Figure 7 A tool schematic view after the ceramic block to be tested, the second fixed plate, the rubber pad and the panel are installed in the embodiment. At this time, the lead wire is connected with the external capacitance transmitter, the capacitance value corresponding to the tool at this time is measured, after the measurement is completed, the corresponding capacitance value is recorded, the ceramic block to be tested is replaced, and the above work process is repeated, so that the dielectric constant stability test of a batch of ceramic blocks to be tested is completed, and the test results are shown in the following table:

[0038] Table 1

[0039] Measurement number Capacitance C / pF Ceramic 1 17.683 Ceramic 2 18.063 Ceramic 3 17.836 Ceramic 4 17.817 Ceramic 5 17.99 Ceramic 6 18.138 Ceramic 7 18.132 Ceramic 8 17.884 Ceramic 9 17.994 Ceramic 10 17.9 Ceramic 11 17.92 Ceramic 12 17.003 Ceramic 13 17.555 Ceramic 14 17.76

[0040] Figure 9 A test data curve graph of the ceramic block to be tested and the corresponding capacitance value provided in the embodiment, the horizontal axis is each ceramic block to be tested, and the vertical axis is the corresponding capacitance value, unit: pF. The ceramic block to be tested with a large deviation of capacitance value is removed, so that the dielectric constant of the batch of ceramic blocks to be tested has high stability.

[0041] It can be recognized that the embodiment simulates the structure of the capacitance probe through the layered detachable design, takes the pole piece in the tool as one pole of the capacitor, takes the panel, the bottom plate, the first fixed plate and the second fixed plate as the other pole of the capacitor, takes the rubber pad, the ceramic block to be tested, the insulating gasket and the insulating fixed sheet as the insulating medium of the capacitor, measures the capacitance value of the tool under the condition that only the ceramic block to be tested is replaced, so that the dielectric constant stability of a batch of ceramic parts is quickly measured, the production cost is low, the operation is convenient, and the test cost of the dielectric constant stability of the ceramic parts is reduced.

[0042] Further as an optional embodiment, the lower surface of the pole piece is welded with the lead wire, and the lead wire is connected with the outside through the center opening of the insulating gasket and the lead-out slot.

[0043] Further, as an optional embodiment, the insulating fixing sheet is shaped to match the bottom of the pole sheet, and the insulating fixing sheet is used to fix the pole sheet.

[0044] Further, as an optional embodiment, the shape of the insulating gasket, the shape of the insulating fixing sheet, and the shape of the ceramic block to be measured all match the shape of the first fixing plate, a gap is left between the first fixing plate and the top of the pole sheet, the bottom of the ceramic block to be measured is embedded in the gap between the first fixing plate and the top of the pole sheet, and the first fixing plate is used to fix the insulating gasket, the insulating fixing sheet, and the ceramic block to be measured.

[0045] Further, as an optional embodiment, the shape of the first fixing plate matches the shape of the second fixing plate.

[0046] Further, as an optional embodiment, the shape of the second fixing plate matches the shape of the ceramic block to be measured, the second fixing plate is sleeved on the top of the ceramic block to be measured, and the second fixing plate is used to fix the ceramic block to be measured.

[0047] Further, as an optional embodiment, the device further comprises a rubber pad arranged on the lower surface of the panel.

[0048] Further, as an optional embodiment, the shape of the second fixing plate matches the shape of the panel.

[0049] The above is only a preferred embodiment of the present application, and the present application is not limited to the above-mentioned embodiments, as long as the same means are used to achieve the technical effects of the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application. The technical solutions and / or embodiments in the protection scope of the present application can have various modifications and changes.

Claims

1. A ceramic component dielectric constant stability measuring apparatus characterized by comprising: The device comprises a panel, a pole piece, a first fixing plate, a second fixing plate, a bottom plate, a wire outlet slot, an insulating gasket and an insulating fixing piece, the first fixing plate is above the bottom plate, the second fixing plate is above the first fixing plate, the panel is above the second fixing plate, the wire outlet slot is in the bottom plate, the insulating gasket is above the bottom plate, the center opening of the insulating gasket is communicated with the wire outlet slot, the pole piece and the insulating fixing piece are above the insulating gasket, the insulating fixing piece is sleeved on the bottom of the pole piece, the first fixing plate is sleeved on the outside of the insulating gasket and the insulating fixing piece, a to-be-tested ceramic block is detachably connected with the top of the pole piece, the second fixing plate is detachably connected with the to-be-tested ceramic block, and the panel is detachably connected with the second fixing plate.

2. The device for measuring the dielectric constant stability of a ceramic component according to claim 1, wherein The lower surface of the pole piece is welded with a wire, and the wire is connected with the outside through the center opening of the insulating gasket and the wire outlet slot.

3. The device for measuring the dielectric constant stability of a ceramic component according to claim 1, wherein The shape of the insulating fixing piece is matched with the bottom of the pole piece, and the insulating fixing piece is used for fixing the pole piece.

4. The device for measuring the dielectric constant stability of a ceramic component according to claim 1, wherein The shape of the insulating gasket, the shape of the insulating fixing piece and the shape of the to-be-tested ceramic block are matched with the shape of the first fixing plate, a gap is left between the first fixing plate and the top of the pole piece, the bottom of the to-be-tested ceramic block is embedded in the gap between the first fixing plate and the top of the pole piece, and the first fixing plate is used for fixing the insulating gasket, the insulating fixing piece and the to-be-tested ceramic block.

5. The device for measuring the dielectric constant stability of a ceramic part according to claim 1, wherein The shape of the first fixing plate is matched with the shape of the second fixing plate.

6. The apparatus for measuring the dielectric constant stability of a ceramic part according to claim 1, wherein The shape of the second fixing plate is matched with the shape of the to-be-tested ceramic block, the second fixing plate is sleeved on the top of the to-be-tested ceramic block, and the second fixing plate is used for fixing the to-be-tested ceramic block.

7. The device for measuring the dielectric constant stability of a ceramic component according to claim 1, wherein The device further comprises a rubber gasket arranged on the lower surface of the panel.

8. The apparatus for measuring the dielectric constant stability of a ceramic part according to claim 1, wherein The shape of the second fixing plate is matched with the shape of the panel.

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