CN209787438U - Novel electret polarizing device - Google Patents
Novel electret polarizing device Download PDFInfo
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- CN209787438U CN209787438U CN201920582995.5U CN201920582995U CN209787438U CN 209787438 U CN209787438 U CN 209787438U CN 201920582995 U CN201920582995 U CN 201920582995U CN 209787438 U CN209787438 U CN 209787438U
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Abstract
The utility model provides a novel electret polarizing device, is applied to polarizing device technical field, and the device includes: the low-voltage power supply, the upper polar plate, the public bottom plate and the fixing piece. The upper polar plate is provided with a first upper surface and a first lower surface, the public baseplate is provided with a second upper surface and a second lower surface, the first lower surface of the upper polar plate is opposite to the second upper surface of the public baseplate, and the second lower surface of the public baseplate is provided with a grounding wire. The low-voltage power supply is provided with a first voltage output end and a second voltage output end, the first voltage output end is electrically connected with the first upper surface of the upper polar plate through a first lead, the second voltage output end is electrically connected with the second lower surface of the common bottom plate through a second lead, and the polarities of output voltages of the first voltage output end and the second voltage output end are opposite. The upper polar plate is fixed above the public bottom plate through a fixing piece. The device utilizes the low voltage power to polarize the operation to the electret, can promote the uniformity of polarization, improves the security of polarization operation, reduces environmental pollution.
Description
Technical Field
The utility model relates to a polarization technical field especially relates to a novel electret polarizes device.
Background
The electret diaphragm or the back plate of the microphone head in the condenser microphone needs to be polarized to form a charged body, so that the microphone can normally work. The existing electret polarization equipment is generally high-voltage polarization equipment which is composed of components such as a high-voltage polarization power supply, a high-voltage discharge molybdenum wire, a medium-voltage-equalizing net, a polarization device supporting plate, a bottom plate and the like. The high-voltage output end of the high-voltage polarization power supply is connected with the high-voltage discharge molybdenum wire, the medium-voltage output end is connected with the medium-voltage-equalizing net, and the grounding end is connected with the bottom plate. When the polarization operation is carried out, the high-voltage polarization power supply generates and outputs direct current negative high-voltage electricity of about 2 ten thousand volts, the direct current negative high-voltage electricity is connected into the high-voltage discharge molybdenum wire, then high-voltage discharge is carried out on the bottom plate through a medium-voltage equalizing net and a polarized device (such as a membrane or a back plate) in the polarization device supporting plate, and the polarization of the polarized device on the polarization device supporting plate can be realized through a high-voltage electric field generated by the high-voltage discharge. The above-mentioned high-voltage polarization apparatus generally has the following disadvantages:
1. A high voltage source of 20000V (volts) and an adjustable medium voltage source of 1000V are required, so the manufacturing cost is high;
2. the high-voltage power supply is easy to have the danger of high-voltage breakdown of equipment, and particularly in rainy days, the high-voltage power supply can discharge air at high voltage, so that unsafe factors exist for the equipment and human bodies;
3. during the operation of the plant, ozone gas (o3) is generated due to the ionization of oxygen in the air by the high pressure, thus causing adverse effects on the air environment and consequently on the health of the staff.
SUMMERY OF THE UTILITY MODEL
A primary object of the present invention is to provide a novel electret polarizing device, which utilizes a low voltage power supply to polarize an electret, and can improve the uniformity of polarization, improve the safety of polarization operation, and reduce environmental pollution.
the embodiment of the utility model provides a novel electret polarizes device, include:
The low-voltage power supply, the upper polar plate, the public bottom plate and the fixing piece are arranged on the base plate;
The upper polar plate is provided with a first upper surface and a first lower surface, the public baseplate is provided with a second upper surface and a second lower surface, the first lower surface of the upper polar plate is opposite to the second upper surface of the public baseplate, and the second lower surface of the public baseplate is provided with a grounding wire;
The low-voltage power supply is provided with a first voltage output end and a second voltage output end, wherein the first voltage output end is electrically connected with the first upper surface of the upper polar plate through a first lead, the second voltage output end is electrically connected with the second lower surface of the common bottom plate through a second lead, and the polarities of output voltages of the first voltage output end and the second voltage output end are opposite;
The upper polar plate is fixed above the public bottom plate through the fixing piece, so that a space for accommodating a device to be polarized is formed between the upper polar plate and the public bottom plate.
According to the embodiment, the novel electret polarizing device has the beneficial effects that:
1. compared with a high-voltage polarization device, the novel electret polarization device cancels a high-voltage power supply, a high-voltage discharge molybdenum wire and a medium-voltage-sharing wire net, and can complete polarization operation only by an upper polar plate, a public bottom plate and a low-voltage power supply, so that the novel electret polarization device has the advantages of simple structure and low manufacturing cost;
2. The low-voltage power supply is adopted for polarization operation, and the low-voltage power supply has the advantages of safe operation, low fault occurrence rate, convenient maintenance and easy realization of automatic production due to low voltage and low current, and can eliminate air pollution caused by high-voltage polarization;
3. because the quantity of polarization depends on the areas of the upper polar plate and the common bottom plate, the quantity of polarization can be controlled by adjusting the areas of the upper polar plate and the common bottom plate, and the production efficiency is high.
Drawings
fig. 1 is a schematic structural diagram of a novel electret polarizing device according to an embodiment of the present invention;
fig. 2 is a schematic view of a connection structure of an upper plate, a common base plate, and a fixing member in the novel electret polarizing device shown in fig. 1.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.
the interpretation of the terms used in this application:
Polarization: the dielectric obtains the process of electric charge and presenting electric property under the action of the electric field.
Electret: electret refers to a polymer dielectric material with dipole orientation and long-term polarization, and the thin film can be used as a diaphragm or a back plate coating layer of a capacitor microphone. The electret can become a charged body and never vanishes in an electric field, so the polarized electret is also called a permanent body.
Polarization of electret vibrating diaphragm and back plate: the vibrating diaphragm and the back plate of the condenser microphone form a microphone head for sound-electricity conversion, in the design, one of the vibrating diaphragm and the back plate is made of electret dielectric materials and needs to be polarized into a charged body, and the microphone can normally work.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a novel electret polarizing device according to an embodiment of the present invention. Fig. 2 is a schematic view of a connection structure of an upper plate, a common base plate, and a fixing member in the novel electret polarizing device shown in fig. 1.
With reference to fig. 1 and 2, the novel electret polarizing device includes: a low voltage power supply 10, an upper plate 20, a common base plate 30, and a fixing member 40.
As shown in fig. 2, the upper plate 20 has a first upper surface 21 and a first lower surface 22, and the common base plate 30 has a second upper surface 31 and a second lower surface 32, wherein the first lower surface 22 of the upper plate 20 is opposite to the second upper surface 31 of the common base plate 30, and the ground line 50 is disposed on the second lower surface 32 of the common base plate 30.
The low voltage power supply 10 has a first voltage output terminal 11 and a second voltage output terminal 12, wherein the first voltage output terminal 11 is electrically connected to the first upper surface 21 of the upper plate 20 through a first conductive line 111, the second voltage output terminal 12 is electrically connected to the second lower surface 32 of the common base plate 30 through a second conductive line 121, and the polarities of the output voltages of the first voltage output terminal 11 and the second voltage output terminal 12 are opposite.
the upper plate 20 is fixed above the common base plate 30 by a fixing member 40 to form a space between the upper plate 20 and the common base plate 30 for accommodating a device to be polarized 60. Wherein the device to be polarized 60 may for example but not limited to be: a diaphragm and a back plate of a condenser microphone, and the like.
Optionally, the distance between the first lower surface 21 of the upper plate 20 and the second upper surface 32 of the common base plate 30 is in the range of 2 mm to 4 mm, preferably 2 mm, 2.5 mm, 3 mm, 3.5 mm or 4 mm.
The working principle of the application lies in that: according to the principle of polarization, the polarization charge obtained by the polarized object is in direct proportion to the polarization voltage and in inverse proportion to the distance, and according to the principle, particularly for the polarization of the electret material, the polarization can be finished even if the polarization voltage is greatly reduced to hundreds of volts by adjusting the distance between the polarization device and the polarization voltage to be the nearest.
Further, the first voltage output terminal 11 is a negative voltage output terminal, and the second voltage output terminal 12 is a power supply common terminal. Wherein, the output voltage of the negative voltage output end is a negative electrode. The common terminal of the power supply is grounded, and the output voltage of the power supply is a positive pole. When a negative polarization operation is required, an electret as a device to be polarized is placed on the second upper surface 31 of the common base 30. It will be appreciated that the electrets are generally disc-shaped, with the bottom of the electrets contacting the second upper surface 31 of the common base plate 30, but the top not contacting the first lower surface 22 of the upper plate 20. Then, a power switch of the low voltage power supply 10 is turned on, the negative charges output by the low voltage power supply 10 discharge the electret in a short distance, and the charges are captured in the electret trap inside the electret microstructure, so that the electret microstructure is electrically charged to the outside, and the polarization effect is achieved. Based on the above principle, the novel electret polarization device that this application provided adopts the low-voltage, closely, presses close to the mode of polarization, has saved high voltage power supply and medium voltage equalizing power supply, directly presses close to the article surface of being polarized with low-volt high internal resistance safety DC power supply, equally can obtain good polarization effect.
Optionally, the upper plate 20 is a conductive glass plate with a thickness ranging from 3 mm to 5 mm, and preferably, the upper plate 20 is made of conductive glass with a thickness of 4 mm, so that the method has the advantages of safe single-side conduction operation, flat and uniform plate surface, uniform discharge and contribution to polarization consistency improvement.
Optionally, the common base plate 30 is a conductive glass plate with a thickness ranging from 7 mm to 9 mm, and preferably, the common base plate 30 is made of conductive glass with a thickness of 8 mm, so that the advantages of safe single-side conduction operation, flat and uniform plate surface, uniform discharge, high conductivity, stability and reliability are achieved.
Optionally, the fixing member 40 is a supporting means for supporting the upper plate 20 above the common base plate 30. Preferably, the support means is an insulating rubber pad with a thickness of 3 mm. In use, according to actual requirements, the working gap between the upper polar plate 20 and the common base plate 30 can be adjusted by replacing the insulating rubber pads with different thicknesses, so as to adapt to devices to be polarized with different thicknesses. Moreover, by replacing the insulating rubber pads with different sizes, the number of the devices to be polarized which can be placed on the common base plate 30 can be adjusted, so that the number of the devices to be polarized in one polarization operation can be controlled.
Optionally, the low voltage power supply 10 is an adjustable dc regulated power supply with an output voltage of 200 v. The adjustable direct current stabilized voltage power supply with the output voltage of 200V has the requirements of stabilized voltage, constant current source and high internal resistance on the power supply, and the output voltage can not generate the floating of current and voltage due to the change of external conditions once being set, so that the polarization stability and high precision can be ensured. Alternatively, as shown in fig. 1, the low voltage power supply 10 may further include: a voltage display 13 for displaying an output voltage, a current display 14 for displaying an output current, a voltage setting button 15 for setting a voltage, and a current setting button 16 for setting a current. Specifically, the low voltage power supply 10 may be, for example, a programmable linear dc power supply of type IPD-20001 SLU.
optionally, the first voltage output terminal 11 is a power supply common terminal, and the second voltage output terminal 12 is a negative voltage output terminal.
Alternatively, the fixing member 40 includes at least one fixing plate made of an insulating material.
The thickness of at least one end portion of the upper plate 20 and at least one end portion of the common base plate 30 is smaller as it approaches the outer edge. The fixing plate is provided with a plurality of pairs of grooves, and at least one end of the upper plate 20 and at least one end of the common base plate 30 are inserted into at least one pair of grooves of the fixing plate. The groove pitch of each pair of grooves is different, so that the distance between the upper polar plate 20 and the common base plate 30 is adjusted by inserting the upper polar plate 20 and the common base plate 30 into different groove pairs, thereby being suitable for devices to be polarized with different thicknesses.
Optionally, the fixing member 40 further includes a spacer having at least one end inserted into the at least one groove of the fixing plate, and the low voltage power supply 10 is placed on the spacer. The partition is further provided with at least one through hole through which the first lead 111 and/or the second lead 121 pass. The bottom of the fixing plate is also provided with a notch, so that the fixing plate is convenient to carry.
Compared with a high-voltage polarization device, on one hand, a high-voltage power supply, a high-voltage discharge molybdenum wire and a medium-voltage-sharing wire net are eliminated, and the polarization operation can be completed only by an upper polar plate, a public bottom plate and a low-voltage power supply, so that the novel electret polarization device has the advantages of simple structure and low manufacturing cost; on the other hand, the low-voltage power supply is adopted for polarization operation, and the low-voltage power supply has the advantages of safe operation, low fault occurrence rate, convenience in maintenance and easy realization of automatic production due to low voltage and low current, and can eliminate air pollution caused by high-voltage polarization; in addition, because the number of polarization depends on the areas of the upper polar plate and the common bottom plate, the number of polarization can be controlled by adjusting the areas of the upper polar plate and the common bottom plate, and the method has the advantage of high production efficiency.
Above is the utility model provides a novel electret polarizes description of device to technical personnel in the field, according to the utility model discloses the thought of embodiment all has the change part on concrete implementation and application scope, to sum up, this description content should not be understood as being right the utility model discloses a restriction.
Claims (10)
1. A novel electret polarizing device, comprising: the low-voltage power supply, the upper polar plate, the public bottom plate and the fixing piece are arranged on the base plate;
the upper polar plate is provided with a first upper surface and a first lower surface, the public baseplate is provided with a second upper surface and a second lower surface, the first lower surface of the upper polar plate is opposite to the second upper surface of the public baseplate, and the second lower surface of the public baseplate is provided with a grounding wire;
The low-voltage power supply is provided with a first voltage output end and a second voltage output end, wherein the first voltage output end is electrically connected with the first upper surface of the upper polar plate through a first lead, the second voltage output end is electrically connected with the second lower surface of the common bottom plate through a second lead, and the polarities of output voltages of the first voltage output end and the second voltage output end are opposite;
the upper polar plate is fixed above the public bottom plate through the fixing piece, so that a space for accommodating a device to be polarized is formed between the upper polar plate and the public bottom plate.
2. The apparatus of claim 1, wherein a spacing between the first lower surface of the upper plate and the second upper surface of the common base plate is in a range of 2 mm to 4 mm.
3. the apparatus of claim 1, wherein the top plate is a conductive glass plate having a thickness in the range of 3 mm to 5 mm.
4. The apparatus of claim 1, wherein the common base plate is a conductive glass plate having a thickness in the range of 7 mm to 9 mm.
5. The apparatus of any one of claims 1 to 4, wherein the low voltage power supply is a regulated DC voltage regulator having an output voltage of 200 volts.
6. An apparatus according to any one of claims 1 to 4, wherein the fixing means is a support means for supporting the upper plate above the common base plate.
7. The apparatus of claim 6, wherein the support means is an insulating rubber mat having a thickness of 3 mm.
8. The apparatus of claim 1, wherein the first voltage output is a negative voltage output and the second voltage output is a power supply common.
9. The apparatus of claim 1, wherein the first voltage output terminal is a power supply common terminal and the second voltage output terminal is a negative voltage output terminal.
10. The apparatus of claim 1, wherein the fixing member includes at least one fixing plate made of an insulating material, the fixing plate is provided with a plurality of pairs of grooves, and the grooves of each pair of grooves have different groove pitches, and at least one end portion of the upper plate and at least one end portion of the common base plate are inserted into at least one pair of grooves of the fixing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920582995.5U CN209787438U (en) | 2019-04-26 | 2019-04-26 | Novel electret polarizing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920582995.5U CN209787438U (en) | 2019-04-26 | 2019-04-26 | Novel electret polarizing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209787438U true CN209787438U (en) | 2019-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920582995.5U Active CN209787438U (en) | 2019-04-26 | 2019-04-26 | Novel electret polarizing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209787438U (en) |
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- 2019-04-26 CN CN201920582995.5U patent/CN209787438U/en active Active
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