CN207351545U - Vibration signal extraction element based on gradual change transmitance filter - Google Patents
Vibration signal extraction element based on gradual change transmitance filter Download PDFInfo
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- CN207351545U CN207351545U CN201721397512.1U CN201721397512U CN207351545U CN 207351545 U CN207351545 U CN 207351545U CN 201721397512 U CN201721397512 U CN 201721397512U CN 207351545 U CN207351545 U CN 207351545U
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- vibration signal
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- 238000000605 extraction Methods 0.000 title claims abstract description 11
- 230000003287 optical effect Effects 0.000 claims abstract description 13
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 5
- 230000003321 amplification Effects 0.000 claims description 4
- 239000004065 semiconductor Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 4
- 241000222712 Kinetoplastida Species 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 208000000187 Abnormal Reflex Diseases 0.000 description 1
- 241000931526 Acer campestre Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
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- 238000012544 monitoring process Methods 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
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- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
A kind of vibration signal extraction element based on gradual change transmitance filter is the utility model is related to, including：Laser, gradual change transmitance filter, convex lens, photoelectric sensor and data collecting system；Laser launches laser beam to the optical reflection face of vibrating body to be measured, and the reflected light of formation passes sequentially through the gradual change transmitance filter and convex lens being coaxially disposed；Then it is arranged on the optical sensor at concave lens focus to receive, the signal of optical sensor output is gathered by data collecting system.The utility model is simple in structure, of low cost, can effectively extract vibration signal waveforms.
Description
Technical field
It the utility model is related to vibration measuring technical field, and in particular to a kind of vibration signal based on gradual change transmitance filter carries
Take device.
Background technology
The non-cpntact measurement of vibration signal, has reality in building and bridge safety supervision and anti-terrorism monitoring etc.
Applying value, optically realize the non-contact reading of vibration signal, can expand significantly vibration signal measurement should
Use scope.From the principle of forced vibration, vibration frequency and the vibration source of building, bridge or glass are consistent.Therefore,
It is that would know that the vibration information of vibration source to detect the Oscillation Amplitude of forced oscillation kinetoplast and frequency.
By light beam irradiate vibrating body reflecting surface, reflecting surface because vibration can cause reflected light at grade under back and forth
Fluctuation, the fluctuation carry the amplitude and frequency information of forced oscillation kinetoplast.But in most cases, the amplitude of forced oscillation kinetoplast compared with
It is small, cause that the reflected beams swing laterally apart from very little, and have enter opto-electronic receiver using part flare in the prior art
The method of device receives vibration signal, can complete demodulated signal frequency, but the vibration signal waveforms recovered have it is obvious
Distortion.
Utility model content
The utility model provides a kind of vibration signal extraction element based on gradual change transmitance filter, simple in structure, cost
It is cheap, it can effectively extract vibration signal waveforms.
The technical solution of the utility model is：Based on the vibration signal extraction element of gradual change transmitance filter, including：Laser
Device, gradual change transmitance filter, convex lens, photoelectric sensor and data collecting system；
Laser transmitting laser beam to the optical reflection face of vibrating body to be measured, the reflected light of formation passes sequentially through together
The gradual change transmitance filter and convex lens that axis is set；Then it is arranged on the optical sensor at concave lens focus to receive, light sensing
The signal of device output is gathered by data collecting system.
Further, the photoelectric sensor includes sequentially connected photoelectric tube, pre-amplification circuit, low-pass filter circuit
And second amplifying circuit.
Further, along reflection light direction, a bandpass filter is set before the gradual change transmitance filter.
Further, the laser is the semiconductor laser module of 650nm 5mW.
Further, the gradual change transmitance filter model ND8.
The utility model has beneficial effect：Select the big the Graduated Filter of transmitance variable gradient, make the light intensity of light beam with
Vibration frequency produces change, and the pendular reflex light of isocandela is converted to the optical signal of strength fluctuation, improves the spirit of signal detection
Sensitivity；Using bandpass filter, most of clutter interference light beyond optical maser wavelength is filtered out, improves the signal-to-noise ratio of detecting system.
Brief description of the drawings
Fig. 1 is utility model works schematic diagram；
Fig. 2 is the utility model photosensor structure schematic diagram；
Fig. 3 is the pre-amplification circuit schematic diagram of one embodiment of the utility model；
Fig. 4 is the second amplifying circuit schematic diagram of one embodiment of the utility model.
Embodiment
The utility model is described further with reference to the accompanying drawings and embodiments.
As shown in Figure 1, the vibration signal extraction element based on gradual change transmitance filter, including：Laser, gradual change transmitance
Filter, convex lens, photoelectric sensor and data collecting system；
Laser launches laser beam to the optical reflection face of vibrating body to be measured, and the reflected light of formation, which passes sequentially through, coaxially to be set
The gradual change transmitance filter and convex lens put；Then it is arranged on the optical sensor at concave lens focus to receive, optical sensor is defeated
The signal gone out is gathered by data collecting system.
In one embodiment of the utility model, as shown in Fig. 2, photoelectric sensor includes sequentially connected photoelectric tube, preposition
Amplifying circuit, low-pass filter circuit and second amplifying circuit.Photoelectric tube is PIN photodiode, pre-amplification circuit and two level
Amplifying circuit selects AD620, this is a inexpensive, high-precision instrument amplifier, it is only necessary to which a non-essential resistance is set
Gain, has the characteristics that the high and low noise of input impedance.Pre-amplification circuit and second level amplifying circuit are as shown in Figure 3 and Figure 4.
Using 5 order clusters of Maxim companies into Butterworth LPF, its model MAX7410, is supplied low-pass filter circuit using 5V
Electricity, according to vibration signal to be measured, the frequency of change low-pass filtering input clock signal, so as to fulfill good matching.
In one embodiment of the utility model, along reflection light direction, one is set before the gradual change transmitance filter
The bandpass filter of 650nm.
In one embodiment of the utility model, the laser is the semiconductor laser module of 650nm 5mW, in the module
650nm laser diodes, constant power driven circuit plate and collimation lens are installed, conducting wire connects 5V DC power supplies can point
It is bright, send the good red laser beam of collimation；Module front lens part is rotatable, can adjust the size of hot spot, facilitates signal
Receiving terminal alignment receives reflected light signal.
In one embodiment of the utility model, the gradual change transmitance filter model ND8, transmitance variable gradient is big.
Because the amplitude of forced vibration is smaller, the reflected beams horizontal swing apart from very little, using the big filter of transmitance variable gradient
The sensitivity of signal detection can be effectively improved.
In one embodiment of the utility model, audio signal is sent using speaker, allows the glass of building to do forced vibration；
Laser and reflection light receiving part are fixed on tripod respectively, adjust suitable beam incident angle, adjustment reflection
The position of light receiving part, the hot spot for reflecting next on glass is all projected into lens, through data collecting system acquisition process, is made
The audio frequency vibration signal that speaker is sent or the vibration signal extracted using oscillograph observation can be successfully listened to earphone.
The above is only the preferred embodiment of the present invention, it is all done according to present utility model application the scope of the claims it is equal
Deng change and modify, should all belong to the covering scope of the utility model.
Claims (5)
1. the vibration signal extraction element based on gradual change transmitance filter, it is characterised in that including：Laser, gradual change transmitance
Filter, convex lens, photoelectric sensor and data collecting system；
The laser launches laser beam to the optical reflection face of vibrating body to be measured, and the reflected light of formation, which passes sequentially through, coaxially to be set
The gradual change transmitance filter and convex lens put；Then it is arranged on the optical sensor at concave lens focus to receive, optical sensor is defeated
The signal gone out is gathered by data collecting system.
2. the vibration signal extraction element according to claim 1 based on gradual change transmitance filter, it is characterised in that described
Photoelectric sensor includes sequentially connected photoelectric tube, pre-amplification circuit, low-pass filter circuit and second amplifying circuit.
3. the vibration signal extraction element according to claim 1 based on gradual change transmitance filter, it is characterised in that along anti-
Light direction is penetrated, a bandpass filter is set before the gradual change transmitance filter.
4. the vibration signal extraction element according to claim 1 based on gradual change transmitance filter, it is characterised in that described
Laser is the semiconductor laser module of 650nm 5mW.
5. the vibration signal extraction element according to claim 1 based on gradual change transmitance filter, it is characterised in that described
Gradual change transmitance filter model ND8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721397512.1U CN207351545U (en) | 2017-10-27 | 2017-10-27 | Vibration signal extraction element based on gradual change transmitance filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721397512.1U CN207351545U (en) | 2017-10-27 | 2017-10-27 | Vibration signal extraction element based on gradual change transmitance filter |
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| Publication Number | Publication Date |
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| CN207351545U true CN207351545U (en) | 2018-05-11 |
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| CN201721397512.1U Expired - Fee Related CN207351545U (en) | 2017-10-27 | 2017-10-27 | Vibration signal extraction element based on gradual change transmitance filter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107560713A (en) * | 2017-10-27 | 2018-01-09 | 罗沛棋 | Vibration signal extraction element based on gradual change transmitance filter |
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2017
- 2017-10-27 CN CN201721397512.1U patent/CN207351545U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107560713A (en) * | 2017-10-27 | 2018-01-09 | 罗沛棋 | Vibration signal extraction element based on gradual change transmitance filter |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180511 |