CN203672390U - Long-distance sensing device of combining energy conversion type sensor and optical fiber - Google Patents
Long-distance sensing device of combining energy conversion type sensor and optical fiber Download PDFInfo
- Publication number
- CN203672390U CN203672390U CN201420012344.XU CN201420012344U CN203672390U CN 203672390 U CN203672390 U CN 203672390U CN 201420012344 U CN201420012344 U CN 201420012344U CN 203672390 U CN203672390 U CN 203672390U
- Authority
- CN
- China
- Prior art keywords
- energy conversion
- type sensor
- conversion type
- optical
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model relates to a long-distance sensing device of combining an energy conversion type sensor and an optical fiber. The long-distance sensing device of combining the energy conversion type sensor and the optical fiber comprises a sensing head, a host and a connecting optical cable 5. The sensing head comprises the energy conversion type sensor 1 of current or voltage output and an electro-optical conversion unit 2, the host comprises an electro-optical conversion unit 3 and a signal analysis and processing unit 4, and the connecting optical cable 5 is communicated with the sensing head and the host. The energy conversion type sensor 1 generates the corresponding current output when sensing physical quantity change, and an outputted current is used to drive the electro-optical conversion unit 2. An optical signal generated by the electro-optical conversion unit 2 is transmitted remotely via the connecting optical cable 5, then is reverted to an electric signal via an electro-optical conversion unit 4, and finally the signal analysis and processing unit 4 carries out signal analysis, thereby analyzing a physical quantity. The long-distance sensing device of combining the energy conversion type sensor and the optical fiber can be suitable for a lot of conventional energy conversion type sensors, so that the sensors can work on a long-distance condition without needing power supply. The long-distance sensing device of combining the energy conversion type sensor and the optical fiber has the advantages of simple installation and high applicability, and brings great conveniences for the actual on-site installation and system design.
Description
Technical field
The utility model relates to the remote recording device of a kind of combination energy conversion type sensor and optical fiber, detects for the passive sensing of special remote occasion.
Background technology
From the angular divisions of energy conversion, sensor has two kinds of energy conversion type and energy control types.Energy conversion type sensor, is mainly made up of energy conversion element, and it does not need external power, as the sensor of the sensor based on piezoelectric effect, thermoelectric effect, photoelectric effect, Hall effect etc. Mechanism Design all belongs to sensors with auxiliary electrode were.Energy conversion type sensor is the energy that measured energy directly can be converted to output, as electric current, voltage etc.
In a lot of more special occasions of site of deployment, require sensing device can realize remote, on-the-spot passive detection.Such as field does not power, generally use sun power and powered battery, but its long-term reliability existing problems are affected by weather environment larger; And if field returns by cable or wireless transmission data, need to have at the scene power supply, and easily be subject to electromagnetic interference (EMI).
Summary of the invention
The purpose of this utility model is for the detection demand under some special occasions, and as the power supply of on-the-spot non-transformer, measured point is distant etc. from main equipment room, provides one can not need at tested scene Power supply, the sensing device that operating distance is distant.
The technical solution of the utility model: according to particular application requirement, operating distance is far away, on-the-spot passive, anti-electromagnetic interference (EMI), applicability are strong etc., and many existing energy conversion type sensors, as long as slightly design, just can meet these requirements.
A remote pickup for combination Conversion of Energy type sensor and optical fiber, comprises sensing head, main frame, three parts of connection optical cable.
The energy conversion type sensor that sensing head comprises electric current or Voltage-output, electrooptic switching element; Main frame comprises photoelectric conversion unit, signal analysis and processing unit; Connecting optical cable is used for, by distant distance sensing head and the two UNICOM of main frame, making light signal can transmit back main frame.Energy conversion type sensor produces corresponding electric current output in the time of the quantitative change of perception physics, and its output current is used for driving electrooptic switching element; The light signal that electrooptic switching element produces is realized long-distance transmissions by optical fiber, then in machine room, by photoelectric conversion unit, light signal is reverted to electric signal, and carries out signal analysis, parses surveyed physical quantity.
Energy conversion type sensor in sensing head is based on piezoelectric effect, Hall effect or other effect, can without under condition of power supply by induction your generation current of measurand or voltage signal, when the quantitative change of perception physics, produce corresponding electric current output, its output current is used for driving electrooptic switching element.What produce after changing is not current signal but voltage signal perception is extraneous many sensors, as the sensor based on sensing material piezoelectric effect, its direct output quantity is voltage, now only need to design the circuit of a voltage transitions electric current, just can be used for driving electrooptic switching element.
In sensing head, the effect of electrooptic switching element is that current signal is converted to corresponding light signal.The general light emitting semiconductor device that adopts current drives, comprises LED, VCSEL or semiconductor laser LD etc.According to the intensity difference of the current signal producing, can select different luminescent devices, the light signal that this luminescent device produces has corresponding relation with the electric current flowing through, and this light signal can coupled into optical fibres be realized long-distance transmissions.The feature of LED is that light signal and current signal are linear relationship substantially, can bear larger electric current, but conversion efficiency is lower; And generally at 850nm wave band, can only be coupled with multimode optical fiber, transmission range is within the scope of hundreds of rice.VCSEL has 850nm wavelength, also has 1300nm and 1550nm wave band, and the range of current that can bear is smaller, and the power bracket of output is also smaller, but the efficiency of electric light conversion is higher.The conversion efficiency of LD laser instrument and the scope that can bear are all higher, can realize transmission range farthest, and general 1310nm and 1550nm use morely.Be characterized in generally having the threshold value of several mA, exceed and just can have higher luminous power output after this threshold value.
Have different driving circuits from different luminescent devices are supporting, to ensure that current signal can drive luminescent device work normally.
The light signal producing is realized long-distance transmissions by connecting optical cable, and the connection optical cable adopting is different according to light source meetings different from distance.If as luminescent device, generally adopt multimode optical fiber with LED.VCSEL can select single mode or multimode optical fiber according to wavelength difference, and 850nm's is general with multimode optical fiber, and 1300nm and 1550nm generally use single-mode fiber.LD is conventional is all to adopt standard single-mode fiber.Because be long Distance Transmission, according to site environment, optical fiber is had to different protected modes.Will the be anti-extraneous requirement insulation destroying, have of wanting waterproof, having having, can require select different optical cables according to varying environment.
The interior photoelectric conversion unit of main frame comprises detector and signal amplifying part is divided, and detector can be PIN photodiode light-detecting device or APD light-detecting device.Detector adopts the material corresponding with optical source wavelength.If the general employing GaAs detector of 850nm, if the general employing InGaAs detector of 1300nm or 1550nm.Because signal is generally more weak, connect small signal amplification circuit after detector, after will signal amplifying, pass to signal analysis and processing unit by electric wire.
Signal analysis and processing unit carries out after denoising the signal after amplifying, and calculates the measured of correspondence according to the different principle of sensor with different algorithms.
A key of the utility model device is, according to measured difference, select the sensor of different ranges, different principle, according to the corresponding electrooptic switching element match circuit of sensor design, comprising current/charge-voltage convertor, with the output current value that ensures sensor in sensing head in electrooptic switching element in the current margin of luminescent device.
The beneficial effect of utility model: this device goes for the energy conversion type sensor of wide variety of conventional, make these sensors can be under remote condition without the work of Power supply, have simple, the strong advantage of applicability is installed, for actual field is installed and system has brought very large convenience.
Brief description of the drawings
Fig. 1 is the utility model device schematic diagram.
Fig. 2 is that the utility model adopts Rogowski coil current sensor embodiment schematic diagram.
Fig. 3 is integrating circuit figure.
Fig. 4 is that the utility model adopts magnetic induction sensor embodiment schematic diagram.
1. energy conversion type sensors in figure; 2. electrooptic switching element; 3. photoelectric conversion unit; 4. signal analysis and processing unit; 5. optical cable; 6. Rogowski coil current sensor; 7. Voltage-current conversion unit; 8. magnetic induction sensor; 9. protective cover; 10. permanent magnet; 11. output lines; 12. inductive coils; 13. wheels.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further.
A remote pickup for combination Conversion of Energy type sensor and optical fiber, comprises sensing head, main frame, 5 three parts of connection optical cable, the energy conversion type sensor 1 that sensing head comprises electric current or Voltage-output, electrooptic switching element 2; Main frame comprises photoelectric conversion unit 3, signal analysis and processing unit 4.
Embodiment 1 is the Luo-coil current sensor device of a long distance.
As shown in Figure 2, the utility model device comprises that a Rogowski coil current sensor 6, Voltage-current conversion unit 7, electrooptic switching element 2 adopt LED driver module, photoelectric conversion unit 3 to adopt PIN detector, signal analysis and processing unit 4, and optical cable 5.
The theoretical foundation that Luo-coil is measured electric current is Faraday's electromagnetic induction law and Ampere circuit law, in the time that tested electric current passes through Luo-coil center along axis, coil output voltage value V (t) is directly proportional to the differential of the electric current I (t) by hub of a spool, i.e. V (t)=A1*d I (t)/dt.Voltage-current conversion unit 7 is current signal by voltage signal linear transformation, supposes that coefficient is A2, and, behind Voltage-current conversion unit 7, the current value of driving LED is A1* A2*d I (t)/dt.
LED adopts 850nm wave band, and corresponding optical cable 5 adopts multimode optical fiber.General and the proportional relation of drive current of the Output optical power of LED, supposes that coefficient is A3, and its Output optical power is P (t)=A1* A2*A3*d I (t)/dt; Convert current value i (t) through optical fiber link to by PIN detector, i (t) is still proportional with P (t), is directly proportional to d I (t)/dt.
In signal analysis and processing unit 4, i (t) being carried out to integration, can be to realize with integrating circuit shown in Fig. 3, also can realize by software algorithm.The Vout finally obtaining is directly corresponding with I.
Through to after device normalization, just can realize remote passive by this device and measure electric current.
Embodiment 2 is the railway dedicated magnetic induction type sensing device of a long distance.
The present embodiment electrooptic switching element 2 adopts LD driver module, can transmit farther distance by single mode fiber cable, the longer scope of monitoring Along Railway.
Energy conversion type sensor 1 adopts railway dedicated magnetic inductosyn 8, is used for obtaining train and passes through signal.In the time that train wheel 13 passes through magnetic induction sensor 8, magnetic induction sensor 8 internal magnetic fields change, and Inside coil two ends will produce induction electromotive force.
The inner structure of magnetic induction sensor 8 is as Fig. 4, and wherein protective cover 9 is aluminium matter or engineering plastics.Inductive coil 12 is on permanent magnet 10.Utilize the irony structure of train wheel 13, in the time that train travels on rail, the motion of wheel 13 is horizontal circular motion, wheel 13 cutting magnetic line in the horizontal direction, cause the variation of inductive coil 12 magnetic flux, according to Lenz law, inductive coil 12 produces induced electromotive force, in the time having train to cross, this sensor will be responded to a string electric pulse of output by output line 11, this electric pulse (comprises preposition amplification through signal conditioning circuit, low-pass filtering etc.), deliver to current/charge-voltage convertor 7, the pulse signal of its generation converts pulsed current signal rear drive LD driver module to, the pulsed optical signals that LD sends converts pulse electrical signal to by detector after by single mode fiber cable, after signal analysis and processing unit 4 is processed, can calculate the speed of sending a car, wheel number etc. information, thereby complete the send a car detection of state of train.
Claims (3)
1. in conjunction with a remote recording device for energy conversion type sensor and optical fiber, comprise sensing head, main frame, connection optical cable (5), it is characterized in that the energy conversion type sensor (1) that sensing head comprises electric current or Voltage-output, electrooptic switching element (2); Main frame comprises photoelectric conversion unit (3), signal analysis and processing unit (4); Connect optical cable (5) UNICOM's sensing head and main frame; Energy conversion type sensor (1) produces corresponding electric current output in the time of the quantitative change of perception physics, and its output current is used for driving electrooptic switching element (2); The light signal that electrooptic switching element (2) produces carries out long-distance transmissions by connecting optical cable (5), then by photoelectric conversion unit (4), light signal is reverted to electric signal, carry out signal analysis in signal analysis and processing unit (4), parse surveyed physical quantity.
2. the remote recording device of a kind of combination energy conversion type sensor as claimed in claim 1 and optical fiber, it is characterized in that electrooptic switching element (2) adopts the light emitting semiconductor device of current drives, the intensity difference of the current signal producing according to energy conversion type sensor (1), selecting different luminescent devices, can be LED, VCSEL or semiconductor laser LD; The light signal that luminescent device produces has corresponding relation with the electric current flowing through, and light signal can coupled into optical fibres carry out long-distance transmissions.
3. the remote recording device of a kind of combination energy conversion type sensor as claimed in claim 1 and optical fiber, it is characterized in that photoelectric conversion unit (3) comprises detector and signal amplifying part is divided, detector can be PIN photodiode light-detecting device or APD light-detecting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420012344.XU CN203672390U (en) | 2014-01-09 | 2014-01-09 | Long-distance sensing device of combining energy conversion type sensor and optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420012344.XU CN203672390U (en) | 2014-01-09 | 2014-01-09 | Long-distance sensing device of combining energy conversion type sensor and optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203672390U true CN203672390U (en) | 2014-06-25 |
Family
ID=50968676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420012344.XU Expired - Fee Related CN203672390U (en) | 2014-01-09 | 2014-01-09 | Long-distance sensing device of combining energy conversion type sensor and optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203672390U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103712640A (en) * | 2014-01-09 | 2014-04-09 | 武汉普瑞奇机电设备有限公司 | Long-distance sensing device combining energy conversion sensor and optical fiber |
-
2014
- 2014-01-09 CN CN201420012344.XU patent/CN203672390U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103712640A (en) * | 2014-01-09 | 2014-04-09 | 武汉普瑞奇机电设备有限公司 | Long-distance sensing device combining energy conversion sensor and optical fiber |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101603866B (en) | Distributed optical fiber stress temperature sensing device and sensing method thereof | |
| CN203465033U (en) | Brillouin distributed type optical-fiber temperature sensor based on wide-spectrum light source | |
| CN104569741A (en) | Transmission line fault location method based on optical fiber composite overhead ground wire | |
| CN104655908B (en) | A kind of method for transmitting signals for current transformer | |
| CN102508016A (en) | Voltage detection circuit of motor controller for electric vehicle | |
| CN101696896B (en) | Photoelectric device of distributed optical fiber temperature sensing system | |
| CN102937489A (en) | Distributed temperature measurement device and method of optical fiber composite overhead phase conductor | |
| CN103507831A (en) | Digital multipoint infrared detecting device of railway axle temperature monitoring system | |
| CN103712640A (en) | Long-distance sensing device combining energy conversion sensor and optical fiber | |
| CN106404154A (en) | Optical fiber acoustic wave detection system | |
| CN204535664U (en) | A kind of wide range optical intensity modulation type optical fibre displacement sensor of new structure | |
| CN206164535U (en) | OSC optical module with OTDR function | |
| CN203672390U (en) | Long-distance sensing device of combining energy conversion type sensor and optical fiber | |
| CN102012284B (en) | Photoelectronic device for distributed optical fiber temperature sensor | |
| CN102853936A (en) | Remote distributed fiber Raman temperature sensor | |
| CN204439726U (en) | Lightning current supervising device | |
| CN207624123U (en) | A kind of deformation formula fiber fence device | |
| CN103698047A (en) | High-voltage electrical equipment non-contact fluorescence temperature measurement system | |
| CN203811294U (en) | Fiber-Raman cable-temperature monitoring and alarm system with attenuation self-compensating function | |
| CN208421062U (en) | A kind of steel oil-gas pipeline monitoring of stray current device | |
| CN204831356U (en) | Transmission line and shaft tower state monitoring system | |
| CN104408848B (en) | A kind of precise positioning type optical fiber senses pre-alarm system | |
| CN204116404U (en) | A kind of ultra-weak electronic signal measurement by magnification circuit of fast detector | |
| CN203825757U (en) | Optical fiber anti-intrusion sensing device | |
| CN106817173B (en) | Optical fiber security signal transmitting module and circuit based on transmitter optical subassembly |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140625 Termination date: 20180109 |