CN212723048U - Passive current detection device used in low-frequency mechanical vibration environment - Google Patents
Passive current detection device used in low-frequency mechanical vibration environment Download PDFInfo
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- CN212723048U CN212723048U CN202021468889.3U CN202021468889U CN212723048U CN 212723048 U CN212723048 U CN 212723048U CN 202021468889 U CN202021468889 U CN 202021468889U CN 212723048 U CN212723048 U CN 212723048U
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- 238000001514 detection method Methods 0.000 title claims abstract description 9
- 238000004806 packaging method and process Methods 0.000 claims description 7
- 238000005452 bending Methods 0.000 claims description 5
- 238000005538 encapsulation Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005477 standard model Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The utility model discloses a device that is arranged in passive current detection of low frequency mechanical vibration environment, including two core wires, wire buckle closure, adjusting device top knob, cantilever beam stiff end slider, lead screw, side scale mark, cantilever beam sensor adjusting device etc.. The device is designed in the scheme that the interference vibration force and the electromagnetic force are in the same direction, the current value under the disturbance environment is calculated by reading the readings of the piezoelectric patches in the two cantilever beam sensors, the voltage amplitude is amplified by 2 times, and the low-frequency mechanical vibration interference in the direct current measurement process of the twin-core wire is completely eliminated, so that the measurement is accurate.
Description
Technical Field
The utility model belongs to the measurement field relates to a direct current's passive current detection device of high accuracy height, high sensitivity piezoelectric type in measuring twin-core wire under environment suitable for there is low frequency mechanical vibration.
Background
MEMS technology is used as the leading-edge subject field with high crossing of multiple subjects, is rapidly developed in recent years, and has wide application in the fields of aviation, aerospace, biotechnology and the like. The technology can realize high quality, high yield and low consumption, greatly improves the reliability and intelligent function of the system, and becomes one of active development directions in the electronic field. With the higher requirements and mature technology of people, the application field and range of piezoelectric current sensors are more and more extensive. This requires that the piezoelectric current sensor can satisfy the requirement of maintaining sufficiently high measurement accuracy and sensitivity in various working environments with interference, i.e., can overcome the interference in the environment. The prior art has the equipment design problem that interference vibration and electromagnetic force non-equidirectional lead to prior art equipment can't eliminate the low frequency mechanical vibration interference among the twin-core wire direct current measurement process, and then can't accurately carry out the detection of the passive current in the low frequency mechanical vibration environment.
SUMMERY OF THE UTILITY MODEL
In order to solve the shortcomings and disadvantages of the prior art, the utility model provides a passive current detection device used in low-frequency mechanical vibration environment.
A passive current detection device used in a low-frequency mechanical vibration environment is characterized in that a twin-core lead is positioned above a lead supporting end, a lead buckling cover covers the twin-core lead and is fixedly connected with the lead supporting end, the lead supporting end is fixedly connected with a bottom plate, and the lead buckling cover is designed to be a tangent fitting structure near the centers of the two leads; two cantilever beam sensor adjusting devices are respectively arranged at two ends of the double-core wire, the outer side of the cantilever beam sensor adjusting device at one end is connected with an encapsulated upper-end cantilever beam sensor, the outer side of the cantilever beam sensor adjusting device at the other end is connected with an encapsulated lower-end cantilever beam sensor, the encapsulated upper-end cantilever beam sensor is positioned above the double-core wire, and the encapsulated lower-end cantilever beam sensor is positioned below the double-core wire; the cantilever beam sensor adjusting device is fixed on the base and consists of an adjusting device top knob, an adjusting device shell, a cantilever beam fixed end sliding block, a lead screw and side scale marks; the top knob of the adjusting device is fixed at the top end of the adjusting device shell and is connected with the fixed end sliding block of the cantilever beam through a lead screw, and the top knob of the adjusting device adjusts the position of the fixed end sliding block of the cantilever beam; the cantilever beam fixed end sliding block moves on the lead screw, the lead screw is fixed in the adjusting device shell for measuring, the cantilever beam fixed end sliding block is connected with the encapsulated cantilever beam sensor, and the encapsulated cantilever beam sensor can be adjusted by the knob at the top of the adjusting device and is positioned at the central symmetrical position of the double-core wire.
Preferably, the wire cover is fixed to the wire support end by a bolt and a nut.
Preferably, the packaged upper cantilever beam sensor and the packaged lower cantilever beam sensor are respectively composed of a packaging shell, a permanent magnet, a cantilever beam and a piezoelectric sheet; the permanent magnet is fixedly connected to the free end of the cantilever beam, the piezoelectric sheet is fixed on the cantilever beam, the polarity of the piezoelectric sheet is symmetrical about the Z axis, and the cantilever beam is positioned in the packaging shell; the permanent magnet of the packaged upper end cantilever beam sensor and the permanent magnet of the packaged lower end cantilever beam sensor have the same magnetic pole direction so as to ensure that the cantilever beam bending direction synchronously faces to or is away from the double-core wire when the wire to be tested is electrified.
The utility model discloses the theory of operation: the device is designed in the scheme, when the interference vibration force and the electromagnetic force are in the same direction, the current value under the disturbance environment is calculated by reading the readings of the piezoelectric sheets in the two cantilever beam sensors.
The utility model discloses the beneficial effect who reaches is: 1. the detection device enables the interference vibration force and the electromagnetic force to be in the same direction, avoids the interference problems of parameter vibration and the like, and enables the measurement to be accurate; 2. the device can overcome environmental interference, and can accurately amplify output signals, so that the device reading is more sensitive and accurate.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is an isometric test chart of the present invention;
fig. 2 is a front view of the present invention;
fig. 3 is a side view of the present invention;
fig. 4 is a top view of the present invention;
FIG. 5 is a schematic structural view of the piezoelectric cantilever beam sensor of the present invention;
in the figure: 1. a two-core wire; 2. a wire buckle cover; 3. a nut; 4. a bolt; 5. a wire support end; 6. adjusting a device top knob; 7. an adjustment device housing; 8. a cantilever beam fixed end sliding block; 9. a lead screw; 10. side scale lines; 11. a packaged upper cantilever sensor; 12. a packaged lower cantilever sensor; 13. a base; 1101. a package housing; 1102. a permanent magnet; 1103. a cantilever beam; 1104. a piezoelectric sheet; 14. cantilever beam sensor adjusting device.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
Example 1
A device for detecting passive current in a low-frequency mechanical vibration environment is characterized in that a twin-core lead 1 is positioned above a lead supporting end 5, a lead buckling cover 2 covers the twin-core lead and is fixedly connected with the lead supporting end, the lead supporting end is fixedly connected with a bottom plate 13, and the lead buckling cover is designed to be a tangent fitting structure near the centers of the two leads, so that the leads can be clamped more effectively; two cantilever beam sensor adjusting devices 14 are respectively arranged at two ends of the double-core wire, the outer side of the cantilever beam sensor adjusting device at one end is connected with an encapsulated upper-end cantilever beam sensor 11, the outer side of the cantilever beam sensor adjusting device at the other end is connected with an encapsulated lower-end cantilever beam sensor 12, the encapsulated upper-end cantilever beam sensor is positioned above the double-core wire, and the encapsulated lower-end cantilever beam sensor is positioned below the double-core wire; the cantilever beam sensor adjusting device 14 is fixed on the base 13 and consists of an adjusting device top knob 6, an adjusting device shell 7, a cantilever beam fixed end sliding block 8, a lead screw 9 and a side scale mark 10; the top knob of the adjusting device is fixed at the top end of the adjusting device shell and is connected with the fixed end sliding block of the cantilever beam through a lead screw, and the top knob of the adjusting device adjusts the position of the fixed end sliding block of the cantilever beam; the cantilever beam fixed end sliding block moves on the lead screw, the lead screw is fixed in the adjusting device shell for measuring, the cantilever beam fixed end sliding block is connected with the encapsulated cantilever beam sensor, and the encapsulated cantilever beam sensor can be adjusted by the knob at the top of the adjusting device and is positioned at the central symmetrical position of the double-core wire. The wire buckle cover is fixed at the wire supporting end by a bolt 4 and a nut 3. The packaged upper end cantilever beam sensor and the packaged lower end cantilever beam sensor are respectively composed of a packaging shell 1101, a permanent magnet 1102, a cantilever beam 1103 and a piezoelectric sheet 1104; the permanent magnet is fixedly connected to the free end of the cantilever beam, the piezoelectric sheet is fixed on the cantilever beam, the polarity of the piezoelectric sheet is symmetrical about the Z axis, and the cantilever beam is positioned in the packaging shell; the permanent magnet of the packaged upper end cantilever beam sensor and the permanent magnet of the packaged lower end cantilever beam sensor have the same magnetic pole direction so as to ensure that the cantilever beam bending direction synchronously faces to or is away from the double-core wire when the wire to be tested is electrified.
The utility model adopts the technical proposal that: the device structure size designs to the national standard model of wire, and two-core wire is fixed by wire buckle closure, wire support end, bolt and nut, guarantees that two-core wire does not take place the bending, and wire support end and bottom plate fixed connection. The wire buckle cover is connected with the wire supporting end through bolts and nuts. The wire buckle cover is designed to be a tangent fitting structure near the centers of the two wires, so that the wires can be clamped more effectively. The cantilever beam sensor adjusting device consists of an adjusting device top knob, an adjusting device shell, a cantilever beam fixed end sliding block, a lead screw and side scale marks, and the lower end of the adjusting device is fixed on the bottom plate. The top knob of the adjusting device is rotated according to the side scale marks, so that the position of the sliding block at the fixed end of the cantilever beam can be adjusted. The cantilever beam fixed end sliding block is connected with the encapsulated cantilever beam sensor. When the double-core wire sensor is used, the top knobs of the two adjusting devices are adjusted, so that the cantilever beam sensors arranged at the lower ends and the cantilever beam sensors arranged at the upper ends are symmetrically arranged around the position of the double-core wire. Meanwhile, the center of mass of the permanent magnet at the tail end of the cantilever beam is in the linear interval of the current magnetic field gradient of the double-core lead.
The cantilever beam sensor of encapsulation's structure be: the two symmetrically arranged packaged sensors comprise a packaged shell with the same parameters, a permanent magnet, a cantilever beam and a piezoelectric sheet. Wherein: the packaging shell is used for preventing the precision measurement component from being influenced by external environment and human factors, the two miniature permanent magnets are respectively and fixedly connected to the free ends of the two cantilever beams, the two piezoelectric patches are respectively fixed on the cantilever beams, and the polarities of the piezoelectric patches (the material distribution of each layer) are symmetrical about the Z axis. The magnetic pole directions of the two permanent magnets are the same, so that when the wire to be tested is electrified, the bending direction of the cantilever beam synchronously faces to the double-core wire or is synchronously far away from the double-core wire.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A passive current detection device for use in a low frequency mechanical vibration environment, comprising: the twin-core lead is positioned above the lead supporting end, the lead buckling cover wraps the twin-core lead and is fixedly connected with the lead supporting end, the lead supporting end is fixedly connected with the bottom plate, and the lead buckling cover is designed to be a tangent fitting structure near the centers of the two leads; two cantilever beam sensor adjusting devices are respectively arranged at two ends of the twin-core wire, the outer side of the cantilever beam sensor adjusting device at one end is connected with an encapsulated upper end cantilever beam sensor, the outer side of the cantilever beam sensor adjusting device at the other end is connected with an encapsulated lower end cantilever beam sensor, the encapsulated upper end cantilever beam sensor is positioned above the twin-core wire, and the encapsulated lower end cantilever beam sensor is positioned below the twin-core wire; the cantilever beam sensor adjusting device is fixed on the base and consists of an adjusting device top knob, an adjusting device shell, a cantilever beam fixed end sliding block, a lead screw and side scale marks; the adjusting device top knob is fixed at the top end of the adjusting device shell and connected with the cantilever beam fixed end sliding block through a lead screw, and the adjusting device top knob adjusts the position of the cantilever beam fixed end sliding block; cantilever beam stiff end slider removes on the lead screw, the lead screw is fixed in survey in the adjusting device shell, cantilever beam stiff end slider is connected with the cantilever beam sensor of encapsulation, the adjustable cantilever beam sensor of encapsulation of adjusting device top knob is located about two core wire central symmetry position.
2. A passive current sensing device for use in low frequency mechanical vibration environments according to claim 1, wherein: the wire buckle cover is fixed at the wire supporting end by a bolt and a nut.
3. A passive current sensing device for use in low frequency mechanical vibration environments according to claim 1, wherein: the packaged upper end cantilever beam sensor and the packaged lower end cantilever beam sensor are respectively composed of a packaging shell, a permanent magnet, a cantilever beam and a piezoelectric sheet; the permanent magnet is fixedly connected to the free end of the cantilever beam, the piezoelectric sheet is fixed on the cantilever beam, the polarity of the piezoelectric sheet is symmetrical about the Z axis, and the cantilever beam is positioned in the packaging shell; the permanent magnet of the packaged upper end cantilever beam sensor and the permanent magnet of the packaged lower end cantilever beam sensor have the same magnetic pole direction, and the cantilever beam bending direction synchronously faces to the double-core wire or is synchronously far away from the double-core wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021468889.3U CN212723048U (en) | 2020-07-23 | 2020-07-23 | Passive current detection device used in low-frequency mechanical vibration environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021468889.3U CN212723048U (en) | 2020-07-23 | 2020-07-23 | Passive current detection device used in low-frequency mechanical vibration environment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212723048U true CN212723048U (en) | 2021-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021468889.3U Expired - Fee Related CN212723048U (en) | 2020-07-23 | 2020-07-23 | Passive current detection device used in low-frequency mechanical vibration environment |
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| Country | Link |
|---|---|
| CN (1) | CN212723048U (en) |
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2020
- 2020-07-23 CN CN202021468889.3U patent/CN212723048U/en not_active Expired - Fee Related
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