CN202770554U - Multi-point series optical fiber point-mode temperature measuring system - Google Patents
Multi-point series optical fiber point-mode temperature measuring system Download PDFInfo
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- CN202770554U CN202770554U CN201220286912.6U CN201220286912U CN202770554U CN 202770554 U CN202770554 U CN 202770554U CN 201220286912 U CN201220286912 U CN 201220286912U CN 202770554 U CN202770554 U CN 202770554U
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- optical fiber
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Abstract
The utility model discloses a multi-point series optical fiber point-mode temperature measuring system, comprising a plurality of structurally-identical collection ends and a demodulation end, wherein each of the collection ends is provided with a filter, first, second and third spatial light paths and an optical fiber power taking module, the demodulation end is provided with a filter and fourth, fifth and sixth spatial light paths, each of the collection ends is connected with a corresponding coupler through an optical fiber jumper, and the multiple couplers are connected with the spatial light paths at the demodulation end after being connected in series. The technical scheme of the utility model has the advantages that the size of a probe can be obviously reduced and the miniaturization of the probe can be realized as the collection ends and the demodulation end are connected by the spatial light paths instead of real cables; a low-power processor and a low-power sensor are adopted in the collection ends and they work in an intermittent mode so that ultra-low power consumption can be achieved and the average power consumption is less than 0.1mW; and the system has strong anti-interference capability as the collection ends transmit the collected data to the demodulation end through the optical fiber jumpers in the mode of pulse position modulation.
Description
Technical field
The utility model relates to the sensing and detecting system technical field that use in electric power apparatus integrated monitoring field, relates in particular to a kind of multiple spot cascaded fiber point type temp measuring system.
Background technology
Traditional sensing transducer is a kind of measured physics amount isolation that will input and becomes the device that send as electric signal according to certain ratio.Its output can be directly and the Input matching of the equipment such as system remote control device, recorder, forms data acquisition and monitoring system, is to guarantee the open the light vitals of the power equipment safety such as cabinet, economy, stable operation of transformer, frequency converter unit, high pressure.
In actual applications, above-mentioned site environment is often extremely abominable, operating personnel often can't reach the spot and must gather at a distance these simulating signals, distance is to hundreds of rice even several kilometers, (discharge is disturbed such as celestial body except the various interference owing to industry spot, the corona spark discharge disturbs, the electrical equipment frequency interferences, inductive disturbance) can enter measuring system by different coupling scheme makes outside the signal serious distortion, owing to often exist several kilovolts between in-site measurement circuit ground and the rear end Acquisition Circuit ground wire to the common mode voltage of volts up to ten thousand, if directly link to each other with cable, can produce very large ground loop electric current, safety to equipment and operating personnel consists of great threat, therefore must just can finish high-precision measurement under the state of mutually isolation.
Under such background, even the Fibre Optical Sensor transmitter that has been born is with necessarily lying prostrate step voltage and communicated data signal betwixt between optical fiber isolation collection terminal and the equipment.Optical fiber is because the ability of its excellent electrical insulative property and good anti-electromagnetic interference (EMI), the application very attractive in the electrical hazard environment.Present existing Fibre Optical Sensor transmitter mainly is divided into two large classes: one utilizes the spectrum measurement mode for the fiber grating class; Two is microcontroller class digital transmitter.
The fiber grating class utilizes the Fibre Optical Sensor transmitter of spectrum measurement mode to have completely electrical isolation characteristic, there is not electric part at collection terminal, and be a kind of passive transmitter, but therefore fiber grating class sensing transducer has restricted its popularization and development owing to will use S-LED light source and grating with high costs.Consider cost, in the following high-tension switch cabinet of 35KV, transformer and high voltage converter, use fiber grating class sensing transducer can not be given birth to manufacturer to accept.
Microcontroller class digital transmitter is at the inner disposition built-in micro control system of high-tension apparatus, gathers simulating signal, it is passed back by optical fiber again, can realize equally the optical fiber isolation.But because need to powering, embedded micro control system could normally move, these electric wirings for the micro control system power supply of collection terminal can bring a series of security challenge to product, and the excessive limitation of its volume also is to cause its not high reason of feasibility in high voltage electric power equip ment in addition.
The utility model content
In order to solve problems of the prior art, the utility model provides a kind of multiple spot cascaded fiber point type temp measuring system, support the collection terminal operation by the optical fiber power taking, and the optical cable connected mode discards tradition, adopt the space optics structure, to overcome high, the low defective of security of cost in the prior art, the reduction small product size also reduces power consumption.
In order to achieve the above object, the utility model adopts a kind of multiple spot cascaded fiber point type temp measuring system, comprises collection terminal and a demodulating end that a plurality of structures are identical, and wherein said each collection terminal comprises: the sensor of measuring physical quantity; The data message that sensor is measured and inputs uses the processor of pulse-position modulation method coding; To be converted to from the electric signal of processor input the modulated laser of light signal, described demodulating end comprises laser instrument, the frequency divider that is subjected to the peripheral equipment control Emission Lasers and a plurality of optical demodulators that are connected with a plurality of output terminals of described frequency divider, it is characterized in that: described optical fiber point type temp measuring system also comprises: optical patchcord, and its two ends connect respectively described collection terminal and coupling mechanism; The optical fiber electricity-fetching module is positioned at collection terminal, and the one end connects processor, and the two ends of processor connect respectively described sensor and described modulated laser; Described optical fiber electricity-fetching module is described processor, sensor and modulated laser power supply; The first filter plate is positioned at described collection terminal, is the first space optical path between described the first filter plate and the described modulated laser; Be the second space light path between described the first filter plate and the described optical fiber electricity-fetching module; Be the 3rd space optical path between described the first filter plate and the described optical patchcord, the second filter plate, being positioned at described demodulating end, is the 5th space optical path between described the second filter plate and the described laser instrument, is the 6th space optical path between described the second filter plate and the described frequency divider.
Described coupling mechanism has a plurality of, and an end of each coupling mechanism is connected respectively optical patchcord and a plurality of coupling mechanism connects with series system.
Be the 4th space optical path between first coupling mechanism in described a plurality of coupling mechanism and the second filter plate.
Described a plurality of collection terminal is configured in a plurality of positions, and a plurality of above-mentioned collection terminal is connected with a described demodulating end by a plurality of coupling mechanism series connection.
Described a plurality of collection terminal enters dormant state after each collection period finishes.
Described processor adopting low power processor, described sensor adopts low-power consumption sensor, can realize super low-power consumption, and average power consumption is less than 0.1mW.
Adopt technical scheme advantage described in the utility model to be: between a plurality of collection terminals and demodulating end two parts, to connect replacement entity optical cable with space optical path and connect, can obviously dwindle probe size, realize the probe miniaturization; Adopt low power processor and low-power consumption sensor in the collection terminal, with intermittent work mode, can realize super low-power consumption, average power consumption is less than 0.1mW; Collection terminal is passed the data that collect back demodulating end in the mode of pulse-position modulation in optical patchcord, so that the system rejection to disturbance ability is strong.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment
Further specify implementation step of the present utility model below in conjunction with accompanying drawing.
Embodiment one: present embodiment be to by a plurality of collection terminal 1x1,1x2 ..., the 1xn explanation of measuring the multiple spot cascaded fiber point type temp measuring system structure of temperature signal.
In this embodiment, system with a demodulating end 2 process a plurality of collection terminal 1x1,1x2 ..., the data-signal of 1xn.
As shown in Figure 1, collection terminal 1x1,1x2 ..., 1xn is configured in a plurality of environment to be detected, demodulating end 2 and external unit 3 are configured in the place away from test environment.
At a plurality of collection terminal 1x1,1x2, ..., in each of 1xn, optical fiber electricity-fetching module 6x1,6x2, ..., 6xn is to collection terminal 1x1,1x2, ..., the 1xn power supply, sensor 8x1,8x2, ..., 8xn begins the collecting temperature data and with data input processor 7x1,7x2, ..., 7xn, processor 7x1,7x2, ..., 7xn is with sensor 8x1,8x2, ..., input modulated laser 9x1 behind the method coding of the data message of 8xn input with pulse-position modulation, 9x2, ..., 9xn, modulated laser 9x1,9x2, ..., 9xn launches light into space optical path 13x1,13x2, ..., 13xn, again through filter plate 5x1,5x2, ..., 5xn, space optical path 15x1,15x2, ..., 15xn, optical patchcord 4x1,4x2, ..., 4xn, described each optical patchcord 4x1,4x2, ..., 4xn respectively is connected respectively a coupling mechanism x1, x2, ..., xn, light is through coupling mechanism x1, x2, ..., xn is coupled to space optical path 16, the filter plate 10 to the demodulating end 2 again, filter plate 10 is respectively λ 1 with wavelength, λ 2, ..., the light of λ n is separated, input frequency divider 19, frequency divider 19 has a plurality of output terminals to connect respectively a plurality of optical demodulator 11x1,11x2, ..., 11xn, each optical demodulator 11x1,11x2, ..., the output terminal of 11xn connects respectively external unit 3 and the temperature data after the demodulation is outputed to external unit 3, for applications equipment.
In demodulating end 2, laser instrument 12 emission wavelengths through external unit 3 controls are the laser of λ p, described wavelength is that the laser of λ p is along the direction of space optical path 17 successively wave plate 10 after filtration, 16 minutes coupling mechanism x1 to each series connection of space optical path, x2, ..., xn, enter respectively again optical patchcord 4x1,4x2, ..., 4xn, space optical path 15x1,15x2, ..., 15xn is to filter plate 5x1,5x2, ..., 5xn, filter plate 5x1,5x2, ..., 5xn is respectively that the light of λ p is through space optical path 14x1 with wavelength, 14x2, ..., 14xn input optical fibre electricity-fetching module 6x1,6x2, ..., 6xn, optical fiber electricity-fetching module 6x1,6x2, ..., 6xn respectively with processor 7x1,7x2, ..., 7xn, sensor 8x1,8x2, ..., 8xn and modulated laser 9x1,9x2, ..., 9xn connects, be that the light of λ p is at optical fiber electricity-fetching module 6x1 when wavelength, 6x2, ..., just can be to processor 7x1 when savings arrives to a certain degree among the 6xn, 7x2, ..., 7xn, sensor 8x1,8x2, ..., 8xn and modulated laser 9x1,9x2, ..., the 9xn power supply, with drive system running, sensor 8x1,8x2, ..., 8xn begins to measure temperature data.
Described processor adopting low power processor, described sensor adopts low-power consumption sensor, can realize super low-power consumption, and average power consumption is less than 0.1mW.
According to different detection demands, sensor 8x1,8x2 ..., 8xn can select the analog or digital sensor of temperature sensor, humidity sensor, current transformer etc., to form the different multiple spot cascaded fiber point type temperature systems that detect effects.
Claims (4)
1. a multiple spot cascaded fiber point type temp measuring system comprises collection terminal and a demodulating end that a plurality of structures are identical, and wherein said each collection terminal comprises: the sensor of measuring physical quantity; The data message that sensor is measured and inputs uses the processor of pulse-position modulation method coding; To be converted to from the electric signal of processor input the modulated laser of light signal, described demodulating end comprises laser instrument, the frequency divider that is subjected to the peripheral equipment control Emission Lasers and a plurality of optical demodulators that are connected with a plurality of output terminals of described frequency divider, it is characterized in that:
Described optical fiber point type temp measuring system also comprises: optical patchcord, and its two ends connect respectively described collection terminal and coupling mechanism;
The optical fiber electricity-fetching module is positioned at collection terminal, and the one end connects processor, and the two ends of processor connect respectively described sensor and described modulated laser; Described optical fiber electricity-fetching module is described processor, sensor and modulated laser power supply;
The first filter plate is positioned at described collection terminal, is the first space optical path between described the first filter plate and the described modulated laser; Be the second space light path between described the first filter plate and the described optical fiber electricity-fetching module; Be the 3rd space optical path between described the first filter plate and the described optical patchcord;
The second filter plate is positioned at described demodulating end, is the 5th space optical path between described the second filter plate and the described laser instrument, is the 6th space optical path between described the second filter plate and the described frequency divider;
Described coupling mechanism has a plurality of, and an end of each coupling mechanism is connected respectively optical patchcord;
Described a plurality of coupling mechanism connects with series system;
Be the 4th space optical path between first coupling mechanism in described a plurality of coupling mechanism and the second filter plate.
2. a kind of multiple spot cascaded fiber point type temp measuring system according to claim 1, it is characterized in that: described a plurality of collection terminals are configured in a plurality of positions, and a plurality of above-mentioned collection terminal is connected with a described demodulating end by a plurality of coupling mechanisms series connection.
3. a kind of multiple spot cascaded fiber point type temp measuring system according to claim 1, it is characterized in that: described sensor is temperature sensor, humidity sensor, current transformer.
4. a kind of multiple spot cascaded fiber point type temp measuring system according to claim 1 is characterized in that: described processor adopting low power processor, described sensor employing low-power consumption sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220286912.6U CN202770554U (en) | 2012-06-15 | 2012-06-15 | Multi-point series optical fiber point-mode temperature measuring system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220286912.6U CN202770554U (en) | 2012-06-15 | 2012-06-15 | Multi-point series optical fiber point-mode temperature measuring system |
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| CN202770554U true CN202770554U (en) | 2013-03-06 |
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| CN201220286912.6U Expired - Fee Related CN202770554U (en) | 2012-06-15 | 2012-06-15 | Multi-point series optical fiber point-mode temperature measuring system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308210A (en) * | 2012-03-06 | 2013-09-18 | 上海华魏光纤传感技术有限公司 | Multi-point series optical fiber point-mode temperature measuring system |
| CN113029386A (en) * | 2021-02-25 | 2021-06-25 | 武汉新楚电力集团有限公司 | Multi-optical-fiber-mode composite distributed optical fiber temperature measurement system and self-adaptive temperature measurement method |
-
2012
- 2012-06-15 CN CN201220286912.6U patent/CN202770554U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308210A (en) * | 2012-03-06 | 2013-09-18 | 上海华魏光纤传感技术有限公司 | Multi-point series optical fiber point-mode temperature measuring system |
| CN113029386A (en) * | 2021-02-25 | 2021-06-25 | 武汉新楚电力集团有限公司 | Multi-optical-fiber-mode composite distributed optical fiber temperature measurement system and self-adaptive temperature measurement method |
| CN113029386B (en) * | 2021-02-25 | 2024-03-22 | 武汉新楚电力集团有限公司 | Multi-optical-fiber-mode composite distributed optical fiber temperature measurement system and self-adaptive temperature measurement method |
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Legal Events
| Date | Code | Title | Description |
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| 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: 20130306 Termination date: 20170615 |