CN202511872U - Novel low-frequency vibration laser detection device under strong electromagnetic interference - Google Patents
Novel low-frequency vibration laser detection device under strong electromagnetic interference Download PDFInfo
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- CN202511872U CN202511872U CN2012201062020U CN201220106202U CN202511872U CN 202511872 U CN202511872 U CN 202511872U CN 2012201062020 U CN2012201062020 U CN 2012201062020U CN 201220106202 U CN201220106202 U CN 201220106202U CN 202511872 U CN202511872 U CN 202511872U
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Abstract
The utility model discloses a novel low-frequency vibration laser detection device under strong electromagnetic interference. The novel low-frequency vibration laser detection device comprises a position sensor, a laser adhered to a measured vibration object, a lens for converging laser beams to a light-sensitive plane of the position sensor, a signal amplification conditioning circuit connected with the position sensor, an analog/digital conversion circuit connected with the signal amplification conditioning circuit, a digital signal processor connected with the analog/digital conversion circuit, and a display and man-machine interaction interface circuit connected with the digital signal processor. The detection device can be widely applied to the field of low-frequency vibration detection, and has the following advantages: 1, the device is simple in installation, accurate in measurement and low in construction cost; 2, the device can be far away from the measured vibration object, and the interference of a strong electromagnetic environment nearby the measured object can be avoided; and 3, and the characteristics such as energy concentration and high directionality of the laser are utilized.
Description
Technical field
The utility model relates to novel low-frequency vibratory laser pick-up unit under the strong electromagnetic.
Background technology
Low-frequency vibration is meant that vibration frequency is below 5-10HZ; Because its vibration acceleration value is little, less to people's direct feel influence, so usually ignored by people; But at some special dimension; For example in the heavy construction structure such as large rotating machine device, but can not ignore low-frequency vibration, thereby be necessary the low-frequency vibration that equipment produces is detected machine or the caused material impact of structure; But existing pick-up unit is installed complicated, and can't the tested vibrating object that be under the strong electromagnetic interference environment be detected.
The utility model content
To the problems referred to above that existing low-frequency vibration detection device exists, the utility model proposes novel low-frequency vibratory laser pick-up unit under the strong electromagnetic.The technological means that the utility model adopts is following:
Novel low-frequency vibratory laser pick-up unit under a kind of strong electromagnetic is provided, has comprised: position transducer; Fit the laser instrument that gives off laser beam perpendicular to the tested vibrating object plane of oscillation with tested vibrating object; Laser beam is converged to the lens on the sensitization plane of position transducer; The link position sensor, the laser spot position electric signal that position transducer is exported amplifies the signal amplifying and conditioning circuit of conditioning; Connect signal amplifying and conditioning circuit, mould/number conversion circuit that the electric signal that signal amplifying and conditioning circuit is exported carries out mould/number conversion; Connection mode/number conversion circuit, with the digital signal of mould/number conversion circuit 5 outputs sample and FFT computing and spectrum analysis after obtain the digital signal processor of characterisitic parameters such as tested vibrating object vibration displacement, frequency; Linking number word signal processor, the characterisitic parameter that the display digit signal processor obtains and demonstration and style man-machine interactive interface circuit that user's Man Machine Interface is provided.
This pick-up unit can be widely used in the low-frequency vibration detection field, and beneficial effect is: 1. install simple measure accurately and cost lower.2. can be away from tested vibrating object, and then can avoid near the interference of the forceful electric power magnetic environment testee.3. utilize the concentration of energy of laser, the characteristic of good directionality.
Description of drawings
Below in conjunction with accompanying drawing and embodiment, the utility model is further elaborated:
Fig. 1 is the structure drawing of device of the utility model.
Embodiment
As shown in Figure 1, the pick-up unit of the utility model comprises: position transducer 3; Fit the laser instrument 1 that gives off laser beam perpendicular to the tested vibrating object plane of oscillation with tested vibrating object; Laser beam is converged to the lens 2 on the sensitization plane of position transducer 3; Link position sensor 3, the laser spot position electric signal that position transducer 3 is exported amplifies the signal amplifying and conditioning circuit 4 of conditioning; Connect signal amplifying and conditioning circuit 4, mould/number conversion circuit 5 that the electric signal that signal amplifying and conditioning circuit 4 is exported carries out mould/number conversion; Connection mode/number conversion circuit 5, with the digital signal of mould/number conversion circuit 5 outputs sample and FFT computing and spectrum analysis after obtain the digital signal processor 6 of characterisitic parameters such as tested vibrating object vibration displacement, frequency; Linking number word signal processor 6, the characterisitic parameter that display digit signal processor 6 obtains and demonstration and style man-machine interactive interface circuit 7 that user's Man Machine Interface is provided.Position transducer 3 is the Two-dimensional PSD sensor preferably, and the distance between Two-dimensional PSD sensor and the lens 2 is greater than the two focus length of lens.
The pick-up unit of the utility model also can comprise: the communication interface 8 of linking number word signal processor 6, so that this pick-up unit utilizes this communication interface 8 to realize the remote transmission of data.Communication interface 8 is the RS485 interface preferably.
The pick-up unit of the utility model also can comprise: the extended memory 9 of linking number word signal processor 6.
The principle of work of above-mentioned detection device is described below: when laser instrument 1 with tested vibrating object X axle or Z axis vibration takes place; The Two-dimensional PSD sensor is experienced the hot spot that laser beam that laser instrument 1 sends forms on its sensitization plane X axle or Z axle change; Because the distance between Two-dimensional PSD sensor and the lens 2 is greater than the twice focal length of lens; Therefore the facula position variable quantity is at double in the vibration displacement of tested vibrating object; After the Two-dimensional PSD sensor becomes corresponding electric signal with two-dimensional laser facula position information translation, after signal amplifying and conditioning circuit 4 processing and mould/number conversion circuit 5 conversions, become digital quantity.Digital signal processor 6 passes through mould/number conversion circuit 5 to be realized the PSD signals sampling, and carries out FFT computing and spectrum analysis, and then accurately detects characterisitic parameters such as tested vibrating object displacement, frequency.System can realize the real-time demonstration and the man-machine conversation of data through demonstration and style man-machine interactive interface circuit 7, and carries out the information remote transmission through communication interface 8.
This pick-up unit can be widely used in the low-frequency vibration detection field, and beneficial effect is: 1. install simple measure accurately and cost lower.2. can be away from tested vibrating object, and then can avoid near the interference of the forceful electric power magnetic environment testee.3. utilize the concentration of energy of laser, the characteristic of good directionality.
Claims (5)
1. novel low-frequency vibratory laser pick-up unit under the strong electromagnetic is characterized in that comprising:
Position transducer (3);
Fit the laser instrument (1) that gives off laser beam perpendicular to the tested vibrating object plane of oscillation with tested vibrating object;
Laser beam is converged to the lens (2) on the sensitization plane of position transducer 3;
Link position sensor (3), the laser spot position electric signal that position transducer (3) is exported amplifies the signal amplifying and conditioning circuit (4) of conditioning;
Connect signal amplifying and conditioning circuit (4), mould/number conversion circuit (5) that the electric signal that signal amplifying and conditioning circuit (4) is exported carries out mould/number conversion;
Connection mode/number conversion circuit (5), with the digital signal of mould/number conversion circuit (5) output sample and FFT computing and spectrum analysis after obtain the digital signal processor (6) of tested vibrating object characterisitic parameter;
Linking number word signal processor (6), characterisitic parameter that display digit signal processor (6) obtains and the demonstration that user's Man Machine Interface is provided and style man-machine interactive interface circuit (7).
2. device according to claim 1 is characterized in that also comprising: the communication interface (8) of linking number word signal processor (6).
3. device according to claim 2 is characterized in that communication interface (8) is the RS485 interface.
4. device according to claim 1 is characterized in that also comprising the extended memory (9) of linking number word signal processor (6).
5. according to claim 1,2,3 or 4 described devices, it is characterized in that position transducer (3) is the Two-dimensional PSD sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201062020U CN202511872U (en) | 2012-03-20 | 2012-03-20 | Novel low-frequency vibration laser detection device under strong electromagnetic interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201062020U CN202511872U (en) | 2012-03-20 | 2012-03-20 | Novel low-frequency vibration laser detection device under strong electromagnetic interference |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202511872U true CN202511872U (en) | 2012-10-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201062020U Expired - Fee Related CN202511872U (en) | 2012-03-20 | 2012-03-20 | Novel low-frequency vibration laser detection device under strong electromagnetic interference |
Country Status (1)
| Country | Link |
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| CN (1) | CN202511872U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535170A (en) * | 2014-12-17 | 2015-04-22 | 大连民族学院 | Three-dimensional low-frequency vibration detection device |
-
2012
- 2012-03-20 CN CN2012201062020U patent/CN202511872U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535170A (en) * | 2014-12-17 | 2015-04-22 | 大连民族学院 | Three-dimensional low-frequency vibration detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121031 Termination date: 20130320 |