CN216955061U - Vibration test platform centering and excessive displacement detection structure - Google Patents
Vibration test platform centering and excessive displacement detection structure Download PDFInfo
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- CN216955061U CN216955061U CN202220641466.XU CN202220641466U CN216955061U CN 216955061 U CN216955061 U CN 216955061U CN 202220641466 U CN202220641466 U CN 202220641466U CN 216955061 U CN216955061 U CN 216955061U
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Abstract
A vibration test bed centering and over-displacement detection structure comprises a magnetic cylinder body and a moving coil, wherein the moving coil is axially arranged in the magnetic cylinder body in a reciprocating motion manner, a baffle is arranged on the moving coil, two photoelectric switch sensors which are arranged corresponding to the baffle are arranged on the magnetic cylinder body, the length of the baffle is half of the stroke of the moving coil, and the length of the baffle is equal to the distance between the two photoelectric switch sensors; in the centering state, the two photoelectric sensors are simultaneously shielded by the baffle; under the excessive displacement state, two photoelectric sensor are not sheltered from by the baffle. In the scheme, the length of the baffle is consistent with the distance between the two photoelectric switch sensors, and the two photoelectric switch sensors can be simultaneously shielded by the baffle and can be used as centering signals only when the baffle is positioned in the middle; only when the amplitude of the moving coil exceeds the length of the baffle, namely, when the moving coil is over-displaced, the two photoelectric switch sensors can not be shielded at the same time and can be used as over-displacement signals.
Description
Technical Field
The utility model relates to the field of vibration tests, in particular to a vibration test bed centering and over-displacement detection structure.
Background
The vibration test bed is used as a mechanical environment test device, is mainly used for verifying the quality of products in a mechanical environment, and along with the continuous improvement of requirements of people on the quality of the products, the electric vibration test bed is widely applied to various fields such as national defense, aviation, aerospace, communication, electronics, automobiles, household appliances and the like.
The electric vibration table is a device which converts electric energy into mechanical energy and provides excitation force for a test piece. The principle of the method is that an exciting force is generated to drive a component according to the interaction of a constant magnetic field and a moving component which is positioned in the constant magnetic field and is electrified with alternating current, and a test piece is placed on the moving component for vibration test. During testing, the moving part of the vibration table needs to be automatically centered.
At present, the moving coil needs to be manually centered in the traditional vibration test bed pair, and different manual inflation and deflation are needed when different loads are changed. And is inflexible and wastes time and energy.
To this, chinese utility model patent CN207336016U discloses a vibration test platform automatic centering device, including the testing machine organism, the testing machine organism links to each other with the control box, the singlechip is equipped with in the control box, be equipped with the movable coil in the testing machine organism, the movable coil both sides are equipped with the excitation coil, the movable coil top is equipped with automatic centering device, and optical fiber transmitter is equipped with to automatic centering device one end, and optical fiber receiver is equipped with to the other end, the movable coil below is equipped with guide system, the guide system below is equipped with air formula suspending device, air formula suspending device's one end is passed through the trachea and is linked to each other with the solenoid valve, be equipped with the manometer on the trachea, the solenoid valve other end links to each other with automatic inflation device.
However, the above-mentioned automatic centering device for the vibrating table has the problems of complicated structure, high cost, space occupation and the like.
In addition, in vibration testing, the amplitude (i.e., half of the stroke) of the moving coil exceeding a specified range is called over-displacement, which may cause damage to the test product. Therefore, how to realize the over-displacement detection of the vibration test bed is also a problem to be solved.
Therefore, in order to overcome the disadvantages of the prior art, it is necessary to design a vibration testing stand centering and over-displacement detecting structure to solve the above problems.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects in the prior art, the utility model aims to provide a vibration test bed centering and over-displacement detection structure.
In order to achieve the above objects and other related objects, the present invention provides the following technical solutions: a vibration test bed centering and over-displacement detection structure comprises a magnetic cylinder body and a moving coil, wherein the moving coil is axially and reciprocally arranged in the magnetic cylinder body, a baffle is arranged on the moving coil, two photoelectric switch sensors which are correspondingly arranged with the baffle are arranged on the magnetic cylinder body, the distance between the two photoelectric switch sensors is consistent with the length of the baffle, and the length of the baffle is consistent with one half of the stroke of the moving coil; in the centering state, the two photoelectric sensors are simultaneously shielded by the baffle; under the over-displacement state, the two photoelectric sensors are not shielded by the baffle.
The preferable technical scheme is as follows: the bottom of the magnetic cylinder body is provided with a fixing frame, and the upper end and the lower end of the fixing frame are provided with sensor mounting supports.
The preferable technical scheme is as follows: the photoelectric switch sensor is fixedly arranged on the sensor mounting bracket, and a probe of the photoelectric switch sensor is arranged inwards and corresponds to the baffle.
The preferable technical scheme is as follows: the baffle is strip-shaped and is arranged on the outer side of the bottom end of the moving coil along the axial direction.
Due to the application of the technical scheme, the utility model has the beneficial effects that:
1. according to the vibration test bed centering and over-displacement detection structure provided by the utility model, the length of the baffle is set to be consistent with the distance between the two photoelectric switch sensors, and the two photoelectric switch sensors can be shielded by the baffle simultaneously only when the baffle is positioned in the middle, so that the two photoelectric switch sensors can be used as centering signals.
2. According to the centering and over-displacement detection structure of the vibration test bed, the length of the baffle is set to be consistent with the distance between the two photoelectric switch sensors, and the two photoelectric switch sensors can not be shielded at the same time and can be used as over-displacement signals only when the amplitude of the moving coil exceeds the length of the baffle; and the over-displacement direction can also be judged according to the sequence that the two photoelectric switch sensors are not shielded.
Drawings
FIG. 1 is a schematic view of the present invention.
In the above drawings, 1, a magnetic cylinder body; 2. moving coils; 3. a baffle plate; 4. a photoelectric switch sensor; 5. a fixing frame.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1. It should be understood that in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which the products of the present invention are usually placed in when used, which is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. The terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should be further noted that, unless otherwise specifically stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, and a communication between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example (b):
as shown in fig. 1, the centering and over-displacement detecting structure for a vibration testing stand provided by the present invention comprises a magnetic cylinder body 1 and a moving coil 2.
The magnetic cylinder body 1 is of a cylindrical structure, and a plurality of magnetic steels are arranged on the inner wall of the magnetic cylinder body in a surrounding mode. The moving coil 2 is axially reciprocatingly provided in the cylinder block 1.
Usually, before the test, the movable coil 2 is driven to reciprocate in the cylinder block 1 by a driving mechanism (not shown) to perform centering positioning.
This scheme is equipped with a mount 5 in the bottom of cylinder block 1, has arranged two sensor installing supports (not shown) along the axial on mount 5, is fixed with photoelectric switch sensor 4 on the sensor installing support. The outer side of the bottom end of the moving coil 2 is provided with a baffle 3, and the baffle 3 is strip-shaped and is arranged along the axial direction and corresponds to the photoelectric switch sensor 4. The length of the baffle 3 is consistent with the distance between the two photoelectric switch sensors 4, and the length of the baffle 3 is consistent with one half of the stroke of the moving coil 2. It is defined that the amplitude of the moving coil 2 exceeds the length of the baffle 3, which is the over-displacement.
In the scheme, the length of the baffle 3 is set to be consistent with the distance between the two photoelectric switch sensors 4; therefore, only when the baffle 3 is located in the middle of the two photoelectric switch sensors 4, the two photoelectric switch sensors 4 are simultaneously shielded by the baffle 3 and can be used as centering signals accordingly.
In the scheme, the length of the baffle 3 is set to be consistent with the distance between the two photoelectric switch sensors 4; therefore, only when the amplitude of the moving coil 2 exceeds the length of the baffle 3, namely, when the moving coil is over-displaced, the two photoelectric switch sensors 4 are not shielded by the baffle 3 at the same time, and can be used as over-displacement signals; and the over-displacement direction can also be judged according to the sequence that the two photoelectric switch sensors 4 are not shielded by the baffle 3.
The method specifically comprises the following steps: when the photoelectric switch sensor 4 is shielded, the photoelectric switch is set to be at a low voltage, and when the photoelectric switch is not shielded, the photoelectric switch is set to be at a high voltage.
In a standing state, when the upper photoelectric switch sensor 4 and the lower photoelectric switch sensor 4 are completely shielded, the movable coil 2 is judged to be in the central position at the moment; when the upper photoelectric switch sensor 4 is shielded and the lower photoelectric switch sensor 4 is not shielded, the movable coil 2 is judged to be upward, and the driving mechanism needs to give a downward force to the movable coil 2 for centering; on the contrary, when the lower photoelectric switch sensor 4 is shielded and the upper photoelectric switch sensor 4 is not shielded, the movable coil 2 is judged to be downward, and the driving mechanism needs to apply an upward force to the movable coil 2 for centering; the automatic centering of the moving coil 2 can be realized by the method.
In a test state, when the photoelectric switch sensors 4 on the upper side and the lower side are not shielded at the same time, namely the stroke of the moving coil 2 exceeds the length of the baffle 3, the moving coil 2 is judged to be in an over-displacement state at the moment. Therefore, the equipment needs protection, the drive mechanism starts chain protection, and the equipment needs shutdown inspection. In addition, the over-displacement direction can be judged according to the sequence that the photoelectric switch sensors 4 on the upper side and the lower side are not shielded.
Therefore, the utility model has the following advantages:
1. according to the vibration test bed centering and over-displacement detection structure provided by the utility model, the length of the baffle is set to be consistent with the distance between the two photoelectric switch sensors, and the two photoelectric switch sensors can be shielded by the baffle simultaneously only when the baffle is positioned in the middle, so that the two photoelectric switch sensors can be used as centering signals.
2. According to the centering and over-displacement detection structure of the vibration test bed, the length of the baffle is set to be consistent with the distance between the two photoelectric switch sensors, and the two photoelectric switch sensors can not be shielded at the same time and can be used as over-displacement signals only when the amplitude of the moving coil exceeds the length of the baffle; and the over-displacement direction can also be judged according to the sequence that the two photoelectric switch sensors are not shielded.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the utility model. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (4)
1. The utility model provides a vibration test platform centering and excessive displacement detect structure, includes cylinder block and moving coil, but the moving coil axial reciprocating motion is located in the cylinder block, its characterized in that: the moving coil is provided with a baffle, the magnetic cylinder body is provided with two photoelectric switch sensors which are arranged corresponding to the baffle, the length of the baffle is one half of the stroke of the moving coil, and the length of the baffle is equal to the distance between the two photoelectric switch sensors; in the centering state, the two photoelectric switch sensors are simultaneously shielded by the baffle; and under the over-displacement state, the two photoelectric switch sensors are not shielded by the baffle.
2. The vibration test bed centering and over-displacement detection structure according to claim 1, characterized in that: the bottom of the magnetic cylinder body is provided with a fixing frame, and the upper end and the lower end of the fixing frame are provided with sensor mounting supports.
3. The vibration test bed centering and over-displacement detection structure according to claim 2, characterized in that: the photoelectric switch sensor is fixedly arranged on the sensor mounting bracket, and a probe of the photoelectric switch sensor is arranged inwards and corresponds to the baffle.
4. The vibration test bed centering and over-displacement detection structure according to claim 1, characterized in that: the baffle is strip-shaped and is arranged on the outer side of the bottom end of the moving coil along the axial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220641466.XU CN216955061U (en) | 2022-03-23 | 2022-03-23 | Vibration test platform centering and excessive displacement detection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220641466.XU CN216955061U (en) | 2022-03-23 | 2022-03-23 | Vibration test platform centering and excessive displacement detection structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216955061U true CN216955061U (en) | 2022-07-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220641466.XU Active CN216955061U (en) | 2022-03-23 | 2022-03-23 | Vibration test platform centering and excessive displacement detection structure |
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| Country | Link |
|---|---|
| CN (1) | CN216955061U (en) |
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- 2022-03-23 CN CN202220641466.XU patent/CN216955061U/en active Active
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