CN108196131A - A kind of fiber optic telecommunications detection device based on MEMS - Google Patents
A kind of fiber optic telecommunications detection device based on MEMS Download PDFInfo
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- CN108196131A CN108196131A CN201810280460.2A CN201810280460A CN108196131A CN 108196131 A CN108196131 A CN 108196131A CN 201810280460 A CN201810280460 A CN 201810280460A CN 108196131 A CN108196131 A CN 108196131A
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- 238000001514 detection method Methods 0.000 title claims abstract description 16
- 239000000835 fiber Substances 0.000 title claims abstract description 15
- 230000003287 optical effect Effects 0.000 claims abstract description 31
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 230000005611 electricity Effects 0.000 claims description 6
- 238000005070 sampling Methods 0.000 claims description 2
- 239000013307 optical fiber Substances 0.000 description 4
- 230000002411 adverse Effects 0.000 description 3
- 239000000306 component Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
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Abstract
The invention discloses a kind of fiber optic telecommunications detection devices based on MEMS.The device includes the first sample circuit, light source, electro-optical modulation device, signal outlet terminal, supply unit, the electro-optical modulation device is used to that the electric signal to be measured that the first sample circuit is acquired to be modulated to the optical signal of light source output and the modulated optical signal generated is transmitted through the fiber to signal outlet terminal, signal outlet terminal is used to demodulate the electric signal in modulated optical signal, and the supply unit is used to provide electric energy for electro-optical modulation device；The supply unit includes：Photoelectric conversion unit, for a part of optical signal of the light source output to be converted to electric signal；Pressure regulation unit is converted to the electric energy being adapted with the electro-optical modulation device and supplies electro-optical modulation device for photoelectric conversion unit to be exported electric signal.The part luminous energy of light source is directly converted to electric energy power supply optical modulator component and used by the present invention, is avoided and is introduced various problems caused by supply unit in systems.
Description
Technical field
The present invention relates to a kind of electrical signal detection devices more particularly to one kind to be based on MEMS (Micro-Electro-
Mechanical System, MEMS) fiber optic telecommunications detection device.
Background technology
Fiber optic telecommunications detection device based on MEMS, core component are the MEMS device for Electro-optical Modulation.Existing
In some systems, energized to provide stable low-voltage to MEMS device, may be used and take electricity from busbar using taking energy coil
And with the mode of batteries to store energy.But such mode is there are many defects, such as is difficult to meet to provide when bus current is extremely low
Enough electric energy and do not puncture when line short circuit current is very big, electromagnetic interference, common electric power storage are easily caused under high pressure adverse circumstances
The problems such as pond self discharge can consume.Another common method is to being placed on high-pressure side with an energy supply laser by optical fiber
Photocell for luminous energy, energized by driving circuit of the photocell to MEMS device.But cost and complexity certainly will be increased in this way.Cause
How this, give fiber optic telecommunications detection device under various environment to provide reliable and stable energy supply, is one and urgently to be resolved hurrily asks
Topic.
Further, since electro-optical modulation device has centainly non-linear, therefore the signal and measured signal that output terminal measures
There are certain offsets.In order to reduce error rate, improve system accuracy, need to deviation be eliminated using effective method.
Invention content
The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and to provide a kind of optical fiber electricity based on MEMS
The part luminous energy of light source is directly converted to electric energy power supply optical modulator component and used, avoided in systems by signal supervisory instrument
Introduce various problems caused by supply unit.
It is of the invention that above-mentioned technical problem is specifically solved using following technical scheme：
A kind of fiber optic telecommunications detection device based on MEMS, including the first sample circuit, light source, electro-optical modulation device,
Signal outlet terminal, supply unit, the electro-optical modulation device are used for the electric signal tune to be measured for being acquired the first sample circuit
It is formed on the optical signal of light source output and the modulated optical signal generated is transmitted through the fiber to signal outlet terminal, signal output
Terminal is used to demodulate the electric signal in modulated optical signal, and the supply unit is used to provide electric energy for electro-optical modulation device；Institute
Supply unit is stated to include：
Photoelectric conversion unit, for a part of optical signal of the light source output to be converted to electric signal；
Pressure regulation unit is converted to for photoelectric conversion unit to be exported electric signal and is adapted with the electro-optical modulation device
Electric energy and supply electro-optical modulation device.
In order to effectively reduce system detectio error, further, described device is further included for the electrooptic modulator
Part carries out the close loop control circuit of closed-loop control, and the close loop control circuit includes：
Second sample circuit, it is identical with the first sample circuit, and telecommunications to be measured can be acquired simultaneously with the first sample circuit
Number；
Comparator, the telecommunications that electric signal to be measured and signal outlet terminal for being acquired to the second sample circuit demodulate
It number makes the difference, and gained difference signal is added in the output signal of the first sample circuit.
Preferably, the first sample circuit and the second sample circuit are sampling resistor or mutual inductor.
In order to which apparatus of the present invention is enable to be used safely in hyperbaric environment, it is preferable that the signal outlet terminal includes：
Low-pressure end photoreceiver, for demodulating the electric signal in modulated optical signal；
Luminous component, the electric signal for low-pressure end photoreceiver to be demodulated are converted to optical signal；
High-pressure side photoreceiver, for inputting the comparison after the optical signal that luminous component is sent out is converted to electric signal
Device.
Preferably, it is single to the energy supply to separate from the exporting of light source a part of optical signal using beam splitter for described device
Member.
Compared with prior art, technical solution of the present invention and its be further improved or optimal technical scheme have below beneficial to effect
Fruit：
1st, the present invention avoids introducing any supply unit, and simplifying system by way of light source energy supply energizes, admirably
The electromagnetic interference of (such as strong hyperbaric environment) system power supply generation is avoided under adverse circumstances.
2nd, technical solution of the present invention is not limited to common current-voltage measurement, is applicable to all signals related with electricity
It measures, applicability is wider.
3rd, the present invention substantially increases the stability of energy supply voltage by photoelectric conversion and pressure regulation.
4th, the present invention is further controlled by closed loop, can effectively reduce the error of measurement.
Description of the drawings
Fig. 1 is the system principle schematic diagram of fiber optic telecommunications detection device；
Fig. 2 is the principle schematic diagram of supply unit in the present invention；
Fig. 3 is the principle schematic diagram of close loop control circuit in the present invention.
Specific embodiment
Technical scheme of the present invention is described in detail below in conjunction with the accompanying drawings：
The basic structure principle of fiber optic telecommunications detection device based on MEMS is as shown in Figure 1.The core device of this kind equipment
Part is electro-optical modulation device, and light source and signal outlet terminal are connected by optical fiber.After optical signal input, pass through the inside of the device
Modulation, can completely detect all kinds of electric signals acted in the system in the signal outlet terminal side of output terminal.
The basic principle of the electro-optical modulation device is as follows：
Light is incident to the device by optical fiber, can be reflected on the surface of different materials, two beam reflected lights are produced each other
Raw interference phenomenon.When electric signal acts on the device, electrostatic force can change interference optical path difference, so as to influence to export.Electricity
Relationship of the optical modulation device between the dough softening of light and the electric signal being applied thereto can be expressed as：
POUT=PIN·K(E)
Wherein, P represents luminous power, and K represents the attenuation function related with electric signal.
And then the signal detected can be subjected to reduction output, therefore can be in signal outlet terminal in signal outlet terminal
Completely detect electric signal.
Sensor-based system in the present invention can be applied to the detection of electric signal under all kinds of environment.In the presence of a harsh environment, in order to have
Electromagnetic interference etc. is avoided to effect, DC power supply apparatus should be reduced as far as, for this purpose, the thinking of the present invention is directly from light source
Output in extraction portion of energy be converted to electric energy supply electro-optical modulation device, to avoid the introducing of external power supply.Specifically,
The fiber optic telecommunications detection device of the present invention including the first sample circuit, light source, electro-optical modulation device, signal outlet terminal, supplies
Energy unit, the electro-optical modulation device are used to the electric signal to be measured that the first sample circuit is acquired being modulated to the light of light source output
The modulated optical signal generated is simultaneously transmitted through the fiber to signal outlet terminal by signal, and signal outlet terminal is used to demodulate tune
Electric signal in optical signal processed, the supply unit are used to provide electric energy for electro-optical modulation device；The supply unit includes：
Photoelectric conversion unit, for a part of optical signal of the light source output to be converted to electric signal；
Pressure regulation unit is converted to for photoelectric conversion unit to be exported electric signal and is adapted with the electro-optical modulation device
Electric energy and supply electro-optical modulation device.
Fig. 2 shows an example of the supply unit.As shown in Fig. 2, the laser output as light source is by dividing
Beam device is divided into two parts, light input end of the part as light carrier input electro-optical modulation device, and another part then first passes through
Electrooptical device is converted to electric signal, and photoelectric conversion unit then is exported electric signal is converted to and the electrooptic modulator
Electric energy that part is adapted simultaneously supplies electro-optical modulation device.Voltage in the present embodiment after opto-electronic conversion is alternating voltage, passes through liter
After pressure and AC-DC conversions are carried out, can obtain the steady dc voltage needed for system, supply electro-optical modulation device (such as horse
Conspicuous Zeng Deer modulators) bias voltage port.
According to different demands, different performance and the electro-optical modulation device of sensitivity may be selected in system, it is sensitive to correspond to its
Degree response optimal wavelength range, may be selected different light sources (Communication ray to visible light region), but can be divided into the light source
Two parts, while modulate and energize.
Since electro-optical modulation device has centainly non-linear, there are one with measured signal for the signal that output terminal measures
Fixed offset.In order to reduce error rate, improve system accuracy, the present invention is further introduced in the apparatus for the electricity
Optical modulation device carries out the close loop control circuit of closed-loop control, and the close loop control circuit includes：
Second sample circuit, it is identical with the first sample circuit, and telecommunications to be measured can be acquired simultaneously with the first sample circuit
Number；
Comparator, the telecommunications that electric signal to be measured and signal outlet terminal for being acquired to the second sample circuit demodulate
It number makes the difference, and gained difference signal is added in the output signal of the first sample circuit.
Fig. 3 shows an example of the close loop control circuit.Detection device in the present embodiment acts on Special Ring
In such as high-voltage fence of border, it is divided into high-pressure side and low-pressure end, is represented in figure 3 with dotted-line ellipse frame.It is as shown in figure 3, sharp
Electric signal to be measured is sampled respectively with two identical sample circuits (such as two identical sample resistances), wherein all the way
Sampled signal (signal I I) inputs electrooptic modulator.The output of photoreceiver electrooptic modulator I that will be connect with electrooptic modulator
Electric signal is applied on LED, is converted into optical signal, then carry out photoelectric conversion by the photoreceiver I I of high-pressure side, is then incited somebody to action
To electric signal be compared with sampled signal all the way (signal I), then difference signal is superimposed on signal I I and acts on electric light
Modulator so as to form an effective close loop control circuit, can effectively reduce systematic error.
The present invention uses signal optical source to be energized for system, effectively prevents strong caused by normal power supplies energy supply under adverse circumstances
Electromagnetic interference, while optimize the situation of powering device complexity.It the composite can be widely applied to the severe ring such as strong high pressure, high-intensity magnetic field
Electrical signal detection under border can also use it for bioelectric detection, by the bioelectrical signals detected, by the data and sea
Normal value in amount database is compared, and can be utilized for the application in terms of biologic medical.
Claims (5)
1. a kind of fiber optic telecommunications detection device based on MEMS, including the first sample circuit, light source, electro-optical modulation device, letter
Number outlet terminal, supply unit, the electro-optical modulation device are used for the electric signal to be measured for being acquired the first sample circuit and modulate
In light source output optical signal and the modulated optical signal generated is transmitted through the fiber to signal outlet terminal, signal output is eventually
For demodulating the electric signal in modulated optical signal, the supply unit is used to provide electric energy for electro-optical modulation device at end；It is special
Sign is that the supply unit includes：
Photoelectric conversion unit, for a part of optical signal of the light source output to be converted to electric signal；
Pressure regulation unit is converted to the electricity being adapted with the electro-optical modulation device for photoelectric conversion unit to be exported electric signal
It can and supply electro-optical modulation device.
2. device as described in claim 1, which is characterized in that further include to carry out closed-loop control to the electro-optical modulation device
Close loop control circuit, the close loop control circuit includes：
Second sample circuit, it is identical with the first sample circuit, and electric signal to be measured can be acquired simultaneously with the first sample circuit；
Comparator, the electric signal that the electric signal to be measured for being acquired to the second sample circuit is demodulated with signal outlet terminal are done
Difference, and gained difference signal is added in the output signal of the first sample circuit.
3. device as claimed in claim 2, which is characterized in that the first sample circuit and the second sample circuit be sampling resistor or
Mutual inductor.
4. device as claimed in claim 2, which is characterized in that the signal outlet terminal includes：
Low-pressure end photoreceiver, for demodulating the electric signal in modulated optical signal；
Luminous component, the electric signal for low-pressure end photoreceiver to be demodulated are converted to optical signal；
High-pressure side photoreceiver, for inputting the comparator after the optical signal that luminous component is sent out is converted to electric signal.
5. device as described in claim 1, which is characterized in that a part of optical signal is separated from the output of light source using beam splitter
To the supply unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810280460.2A CN108196131A (en) | 2018-04-02 | 2018-04-02 | A kind of fiber optic telecommunications detection device based on MEMS |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810280460.2A CN108196131A (en) | 2018-04-02 | 2018-04-02 | A kind of fiber optic telecommunications detection device based on MEMS |
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| CN108196131A true CN108196131A (en) | 2018-06-22 |
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| CN201810280460.2A Withdrawn CN108196131A (en) | 2018-04-02 | 2018-04-02 | A kind of fiber optic telecommunications detection device based on MEMS |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113644977A (en) * | 2021-08-05 | 2021-11-12 | 武汉凹伟能源科技有限公司 | Bidirectional passive laser telephone audio transmission network and sound source positioning method thereof |
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|---|---|---|---|---|
| JPH0361818A (en) * | 1989-07-29 | 1991-03-18 | Toshiba Corp | Photo power dispatching type signal processor |
| JP2003258732A (en) * | 2002-03-06 | 2003-09-12 | Mitsubishi Cable Ind Ltd | Laser light source, power feeding apparatus using the same, wireless carrier discharge system, and portable telephone base station |
| CN1580789A (en) * | 2004-05-15 | 2005-02-16 | 华中科技大学 | Photoelectric direct current sensor |
| CN101345499A (en) * | 2008-05-19 | 2009-01-14 | 西安交通大学 | Photoelectric converter used for energy supply of current mutual inductor |
| JP2010114235A (en) * | 2008-11-06 | 2010-05-20 | Nec Corp | Photoelectric transducer, optical power supply, and method for manufacturing photoelectric transducer |
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| CN103067075A (en) * | 2012-12-20 | 2013-04-24 | 南京航空航天大学 | Light single side band modulation method, light single side band modulator, optical device measuring equipment, and optical device measuring method |
| CN106483373A (en) * | 2016-11-03 | 2017-03-08 | 南京航空航天大学 | A kind of electrooptic modulator frequency response measurement method and measuring system |
| CN207992324U (en) * | 2018-04-02 | 2018-10-19 | 南京曦光信息科技有限公司 | A kind of fiber optic telecommunications detection device based on MEMS |
-
2018
- 2018-04-02 CN CN201810280460.2A patent/CN108196131A/en not_active Withdrawn
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0361818A (en) * | 1989-07-29 | 1991-03-18 | Toshiba Corp | Photo power dispatching type signal processor |
| JP2003258732A (en) * | 2002-03-06 | 2003-09-12 | Mitsubishi Cable Ind Ltd | Laser light source, power feeding apparatus using the same, wireless carrier discharge system, and portable telephone base station |
| CN1580789A (en) * | 2004-05-15 | 2005-02-16 | 华中科技大学 | Photoelectric direct current sensor |
| CN101345499A (en) * | 2008-05-19 | 2009-01-14 | 西安交通大学 | Photoelectric converter used for energy supply of current mutual inductor |
| CN102227543A (en) * | 2008-09-29 | 2011-10-26 | 普拉德研究及开发股份有限公司 | High-temperature downhole devices |
| JP2010114235A (en) * | 2008-11-06 | 2010-05-20 | Nec Corp | Photoelectric transducer, optical power supply, and method for manufacturing photoelectric transducer |
| CN103067075A (en) * | 2012-12-20 | 2013-04-24 | 南京航空航天大学 | Light single side band modulation method, light single side band modulator, optical device measuring equipment, and optical device measuring method |
| CN106483373A (en) * | 2016-11-03 | 2017-03-08 | 南京航空航天大学 | A kind of electrooptic modulator frequency response measurement method and measuring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113644977A (en) * | 2021-08-05 | 2021-11-12 | 武汉凹伟能源科技有限公司 | Bidirectional passive laser telephone audio transmission network and sound source positioning method thereof |
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Application publication date: 20180622 |