CN103267591B - Tree-type optical fiber temperature sensor system and using method thereof - Google Patents
Tree-type optical fiber temperature sensor system and using method thereof Download PDFInfo
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- CN103267591B CN103267591B CN201310197614.9A CN201310197614A CN103267591B CN 103267591 B CN103267591 B CN 103267591B CN 201310197614 A CN201310197614 A CN 201310197614A CN 103267591 B CN103267591 B CN 103267591B
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Abstract
A tree-type optical fiber temperature sensor system comprises four temperature measuring optical cables with identical structures. Each temperature measuring optical cable comprises a light source, a 1*4 optical fiber coupler and four optical fiber temperature sensors. When the tree-type optical fiber temperature sensor system is used, the temperature measuring optical cables work in turn, the four light sources emit light in turn, each light source drives four optical temperature sensor corresponding to each light source to carry out temperature measurement, four obtained temperature detecting signals respectively enter a central processing unit to carry out signal identification through photoelectric detectors corresponding to the light sources, and therefore point type locating is achieved, the tree-type optical fiber temperature sensor system is beneficial for the identification of the addresses of the temperature sensors, and the light sources all are LED light sources or LD light sources. The tree-type optical fiber temperature sensor system is strong in locating performance, capable of completely preventing electronic components from detecting temperature, strong in light splitting or coupling effect, strong in signal stability and long in transmission distance.
Description
Technical field
The present invention relates to a kind of temperature sensor system, relate in particular to a kind of tree type optical fiber temperature transducer system and using method thereof, be specifically applicable to temperature monitoring on a large scale, realize the Address Recognition of temperature sensor, thereby improve treatment effeciency.
Background technology
The temperature sensor that conventional temperature sensor system adopts is taking electric signal as working foundation, and as thermopair, thermistor, pyroelectric detector etc., they have following defect:
1. because there is electric signal, have potential safety hazard 2. electronic devices and components are easily aging in the place inflammable and explosive, electromagnetic radiation intensity is large, moisture-sensitive, and then the even malfunctioning 3. line-type heat detector fire locating poor performance of wrong report, 5. actuation of an alarm temperature range is wide can not to reuse 4. maintenance cost height, cause the low 6. linear optical fiber of sensitivity grating heat fire detector use cost and maintenance cost very high, general user is difficult to accept 7. must be used in conjunction with expensive detection controller (being commonly called as main frame) 8. must Attended mode.
Chinese patent Granted publication number is CN202584343U, Granted publication day is that the utility model patent on Dec 5th, 2012 discloses a kind of intelligent smog detector, comprise central control unit, described central control unit is connected with smoke signal processing module, processes temperature signal module, wireless transmitter module, acoustic-optic alarm, fire extinguishing flusher, described smoke signal processing module is connected with smoke transducer, described processes temperature signal module is connected with temperature sensor, described wireless transmitter module is connected communication wirelessly with wireless receiving module, wireless receiving module is connected with background monitoring platform, background monitoring platform is connected with backstage warning device.Although the generation of this utility model energy detection of fires, and remote monitoring and warning function can be provided, it still has following defect:
1. cannot make Address Recognition to temperature sensor, can not determine in time fire origination point, treatment effeciency is lower;
2. utilize electric signal to carry out temperature sensing, be unsuitable in the place inflammable and explosive, electromagnetic radiation intensity is large installing, have certain potential safety hazard; Electronic devices and components are easily aging, and aging rear easy generation wrong report is even malfunctioning;
3. penetration capacity, the diffracting power of transmission of wireless signals in basement, buildings is very poor, cause may losing in fire signal transmission, thereby hide some dangers for, and transmission range is limited.
Summary of the invention
The object of the invention is to overcome the employing electronic devices and components detecting temperature that exists in prior art, cannot make Address Recognition, signal stabilization weak defect and problem to temperature sensor, provide a kind of and stop electronic devices and components detecting temperature, can make Address Recognition, tree type optical fiber temperature transducer system and using method thereof that signal stabilization is stronger to temperature sensor.
For realizing above object, technical solution of the present invention is: a kind of tree type optical fiber temperature transducer system, comprise temperature sensor assembly, signal processor and central processing unit, one end of described signal processor is connected with temperature sensor assembly, and the other end is connected with central processing unit;
Described temperature sensor assembly comprises a temperature measuring optical cable, No. two temperature measuring optical cables, No. three temperature measuring optical cables and No. four temperature measuring optical cables;
A described temperature measuring optical cable comprises A light source, fibre optic temperature sensor of A, No. bis-fibre optic temperature sensors of A, No. tri-fibre optic temperature sensors of A and No. tetra-fibre optic temperature sensors of A;
Described No. two temperature measuring optical cables comprise B light source, fibre optic temperature sensor of B, No. bis-fibre optic temperature sensors of B, No. tri-fibre optic temperature sensors of B and No. tetra-fibre optic temperature sensors of B;
Described No. three temperature measuring optical cables comprise C light source, fibre optic temperature sensor of C, No. bis-fibre optic temperature sensors of C, No. tri-fibre optic temperature sensors of C and No. tetra-fibre optic temperature sensors of C;
Described No. four temperature measuring optical cables comprise D light source, fibre optic temperature sensor of D, No. bis-fibre optic temperature sensors of D, No. tri-fibre optic temperature sensors of D and No. tetra-fibre optic temperature sensors of D;
Described A light source, B light source, C light source, D light source are connected with one end of a photodetector respectively after fibre optic temperature sensor of corresponding A, fibre optic temperature sensor of B, fibre optic temperature sensor of C, fibre optic temperature sensor of D;
Described A light source, B light source, C light source, D light source are connected with one end of No. two photodetectors respectively after No. bis-fibre optic temperature sensors of corresponding A, No. bis-fibre optic temperature sensors of B, No. bis-fibre optic temperature sensors of C, No. bis-fibre optic temperature sensors of D;
Described A light source, B light source, C light source, D light source are connected with one end of No. three photodetectors respectively after No. tri-fibre optic temperature sensors of corresponding A, No. tri-fibre optic temperature sensors of B, No. tri-fibre optic temperature sensors of C, No. tri-fibre optic temperature sensors of D;
Described A light source, B light source, C light source, D light source are connected with one end of No. four photodetectors respectively after No. tetra-fibre optic temperature sensors of corresponding A, No. tetra-fibre optic temperature sensors of B, No. tetra-fibre optic temperature sensors of C, No. tetra-fibre optic temperature sensors of D;
The other end of a described photodetector, No. two photodetectors, No. three photodetectors, No. four photodetectors is all connected with central processing unit through signal processor.
Described A light source is connected with fibre optic temperature sensor of A, No. bis-fibre optic temperature sensors of A, No. tri-fibre optic temperature sensors of A, No. tetra-fibre optic temperature sensors of A after No. A 1 × 4 fiber coupler;
Described B light source is connected with fibre optic temperature sensor of B, No. bis-fibre optic temperature sensors of B, No. tri-fibre optic temperature sensors of B, No. tetra-fibre optic temperature sensors of B after No. B 1 × 4 fiber coupler;
Described C light source is connected with fibre optic temperature sensor of C, No. bis-fibre optic temperature sensors of C, No. tri-fibre optic temperature sensors of C, No. tetra-fibre optic temperature sensors of C after No. C 1 × 4 fiber coupler;
Described D light source is connected with fibre optic temperature sensor of D, No. bis-fibre optic temperature sensors of D, No. tri-fibre optic temperature sensors of D, No. tetra-fibre optic temperature sensors of D after No. D 1 × 4 fiber coupler.
Fibre optic temperature sensor of described A, fibre optic temperature sensor of B, fibre optic temperature sensor of C, fibre optic temperature sensor of D are connected with one end of a photodetector after 1 × 4 fiber coupler;
No. bis-fibre optic temperature sensors of described A, No. bis-fibre optic temperature sensors of B, No. bis-fibre optic temperature sensors of C, No. bis-fibre optic temperature sensors of D are connected with one end of No. two photodetectors after No. two 1 × 4 fiber couplers;
No. tri-fibre optic temperature sensors of described A, No. tri-fibre optic temperature sensors of B, No. tri-fibre optic temperature sensors of C, No. tri-fibre optic temperature sensors of D are connected with one end of No. three photodetectors after No. three 1 × 4 fiber couplers;
No. tetra-fibre optic temperature sensors of described A, No. tetra-fibre optic temperature sensors of B, No. tetra-fibre optic temperature sensors of C, No. tetra-fibre optic temperature sensors of D are connected with one end of No. four photodetectors after No. four 1 × 4 fiber couplers.
The other end of a described photodetector, No. two photodetectors, No. three photodetectors, No. four photodetectors is all connected with 485 signal wires or CAN bus successively after signal processor, central processing unit.
Described A light source, B light source, C light source, D light source are all LED or LD light source.
A using method for above-mentioned tree type optical fiber temperature transducer system, described using method comprises the following steps:
The first step: A light source is opened, B light source, C light source, D light source is closed, No. one temperature measuring optical cable starts thermometric: the light that A light source sends is first through ovennodulation, evenly be divided into again four bundles to enter respectively fibre optic temperature sensor of A, No. bis-fibre optic temperature sensors of A, No. tri-fibre optic temperature sensors of A, in No. tetra-fibre optic temperature sensors of A, then by fibre optic temperature sensor of A, No. bis-fibre optic temperature sensors of A, No. tri-fibre optic temperature sensors of A, No. tetra-fibre optic temperature sensors of A respectively output optical signal enter a corresponding photodetector, No. two photodetectors, No. three photodetectors, No. four photodetectors are to carry out opto-electronic conversion, signal after opto-electronic conversion enters central processing unit to process one by one through signal processor again, now, central processing unit is to fibre optic temperature sensor of A, No. bis-fibre optic temperature sensors of A, No. tri-fibre optic temperature sensors of A, fixed point monitoring is realized in No. tetra-fibre optic temperature sensors of A address separately,
Second step: B light source is opened, and A light source, C light source, D light source are closed, and No. one temperature measuring optical cable finishes thermometric, and No. two temperature measuring optical cable starts thermometric; C light source is opened, and A light source, B light source, D light source are closed, and No. two temperature measuring optical cable finishes thermometric, and No. three temperature measuring optical cable starts thermometric; D light source is opened, and A light source, B light source, C light source are closed, and No. three temperature measuring optical cable finishes thermometric, and No. four temperature measuring optical cable starts thermometric; A light source is opened, and B light source, C light source, D light source are closed, and No. four temperature measuring optical cable finishes thermometric, and No. one temperature measuring optical cable starts thermometric, carries out in turn successively; The thermometric operation of described No. two temperature measuring optical cables, No. three temperature measuring optical cables, No. four temperature measuring optical cables is identical with the thermometric operation of a temperature measuring optical cable.
Be 800ms the luminous interval time of described A light source, B light source, C light source, D light source.
Described light source is connected with fibre optic temperature sensor through 1 × 4 fiber coupler, described fibre optic temperature sensor is connected with photodetector through 1 × 4 fiber coupler, and between light source, 1 × 4 fiber coupler, fibre optic temperature sensor, photodetector, all adopts communication stage optical fiber cable to connect.
Compared with prior art, beneficial effect of the present invention is:
1, in a kind of tree type optical fiber temperature transducer system of the present invention and using method thereof, comprise altogether four temperature measuring optical cables, each temperature measuring optical cable mainly comprises a light source and four fibre optic temperature sensors, when use, light source in four temperature measuring optical cables is luminous in turn, each light source drives respectively four fibre optic temperature sensors of its correspondence to survey, corresponding four photodetectors of these four fibre optic temperature sensors, thereby it is corresponding one by one with each fibre optic temperature sensor to guarantee that photodetector is delivered to the signal of central processing unit, realize point type location, and then be conducive to the identification of sensor address, improve positioning performance, be convenient to staff and make rapid reaction according to the address of each sensor.Therefore, the present invention not only positioning performance is stronger, and treatment effeciency is higher.
2, a kind of tree type optical fiber temperature transducer system of the present invention and using method thereof have also adopted eight 1 × 4 fiber couplers using light splitting or coupled apparatus as between light source and fibre optic temperature sensor, fibre optic temperature sensor and photodetector, not only can guarantee the uniform distribution of light between input, output optical fibre, be that splitting ratio approaches 25% as far as possible, generally between 20% – 30 %, and insertion loss is less than 3.5dB, homogeneity is less than 0.5dB, be conducive to reduce optical fiber use amount, save cost.Therefore, the present invention not only effect of light splitting or coupling is stronger, and cost is lower.
3, a kind of temperature sensor of setting in type optical fiber temperature transducer system and using method thereof of the present invention is fibre optic temperature sensor, what on it, connect is communication stage optical fiber cable, thereby the design does not comprise any electronic devices and components, can avoid the shortcoming of electronic devices and components detecting temperature in prior art, essence is very safe, be difficult for agingly, there will not be because of aging wrong report or the malfunctioning situation of causing, the place that spy is applicable to is inflammable and explosive, electromagnetic radiation intensity is large.Therefore, the present invention can stop electronic devices and components detecting temperature.
4, a kind of tree type of the present invention optical fiber temperature transducer system adopts 16 fibre optic temperature sensor detecting temperatures, be applied to large-scale temperature survey, the output terminal of central processing unit is connected with 485 signal wires or CAN bus, not only the stability of signal transmission is strong, and the expansion of being convenient to system be connected, fibre optic temperature sensor number is easy to adjust.Therefore, the present invention not only the stability of signal strong, can meet the needs to transmission range in fire protection warning product, and transmission range is long, expansion is convenient, cost is very low.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
In figure: a temperature measuring optical cable A, A light source 11, fibre optic temperature sensor 31 of A, No. bis-fibre optic temperature sensors 32 of A, No. tri-fibre optic temperature sensors 33 of A, No. tetra-fibre optic temperature sensors 34 of A, No. two temperature measuring optical cable B, B light source 12, fibre optic temperature sensor 35 of B, No. bis-fibre optic temperature sensors 36 of B, No. tri-fibre optic temperature sensors 37 of B, No. tetra-fibre optic temperature sensors 38 of B, No. three temperature measuring optical cable C, C light source 13, fibre optic temperature sensor 39 of C, No. bis-fibre optic temperature sensors 310 of C, No. tri-fibre optic temperature sensors 311 of C, No. tetra-fibre optic temperature sensors 312 of C, No. four temperature measuring optical cable D, D light source 14, fibre optic temperature sensor 313 of D, No. bis-fibre optic temperature sensors 314 of D, No. tri-fibre optic temperature sensors 315 of D, No. tetra-fibre optic temperature sensors 316 of D, No. A 1 × 4 fiber coupler 21, No. B 1 × 4 fiber coupler 22, No. C 1 × 4 fiber coupler 23, No. D 1 × 4 fiber coupler 24, 1 × 4 fiber coupler 25, No. two 1 × 4 fiber couplers 26, No. three 1 × 4 fiber couplers 27, No. four 1 × 4 fiber couplers 28, a photodetector 51, No. two photodetectors 52, No. three photodetectors 53, No. four photodetectors 54, signal processor 6, central processing unit 7.
Embodiment
Below in conjunction with brief description of the drawings and embodiment, the present invention is further detailed explanation.
Referring to Fig. 1, a kind of tree type optical fiber temperature transducer system, comprises temperature sensor assembly, signal processor 6 and central processing unit 7, and one end of described signal processor 6 is connected with temperature sensor assembly, and the other end is connected with central processing unit 7;
Described temperature sensor assembly comprises a temperature measuring optical cable A, No. two temperature measuring optical cable B, No. three temperature measuring optical cable C and No. four temperature measuring optical cable D;
A described temperature measuring optical cable A comprises A light source 11, fibre optic temperature sensor 31 of A, No. bis-fibre optic temperature sensors 32 of A, No. tri-fibre optic temperature sensors of A 33 and No. tetra-fibre optic temperature sensors 34 of A;
Described No. two temperature measuring optical cable B comprise B light source 12, fibre optic temperature sensor 35 of B, No. bis-fibre optic temperature sensors 36 of B, No. tri-fibre optic temperature sensors of B 37 and No. tetra-fibre optic temperature sensors 38 of B;
Described No. three temperature measuring optical cable C comprise C light source 13, fibre optic temperature sensor 39 of C, No. bis-fibre optic temperature sensors 310 of C, No. tri-fibre optic temperature sensors of C 311 and No. tetra-fibre optic temperature sensors 312 of C;
Described No. four temperature measuring optical cable D comprise D light source 14, fibre optic temperature sensor 313 of D, No. bis-fibre optic temperature sensors 314 of D, No. tri-fibre optic temperature sensors of D 315 and No. tetra-fibre optic temperature sensors 316 of D;
Described A light source 11, B light source 12, C light source 13, D light source 14 are connected with one end of a photodetector 51 respectively after fibre optic temperature sensor 31 of corresponding A, fibre optic temperature sensor 35 of B, fibre optic temperature sensor 39 of C, fibre optic temperature sensor 313 of D;
Described A light source 11, B light source 12, C light source 13, D light source 14 are connected with one end of No. two photodetectors 52 respectively after No. bis-fibre optic temperature sensors 32 of corresponding A, No. bis-fibre optic temperature sensors 36 of B, No. bis-fibre optic temperature sensors 310 of C, No. bis-fibre optic temperature sensors 314 of D;
Described A light source 11, B light source 12, C light source 13, D light source 14 are connected with one end of No. three photodetectors 53 respectively after No. tri-fibre optic temperature sensors 33 of corresponding A, No. tri-fibre optic temperature sensors 37 of B, No. tri-fibre optic temperature sensors 311 of C, No. tri-fibre optic temperature sensors 315 of D;
Described A light source 11, B light source 12, C light source 13, D light source 14 are connected with one end of No. four photodetectors 54 respectively after No. tetra-fibre optic temperature sensors 34 of corresponding A, No. tetra-fibre optic temperature sensors 38 of B, No. tetra-fibre optic temperature sensors 312 of C, No. tetra-fibre optic temperature sensors 316 of D;
The other end of a described photodetector 51, No. two photodetectors 52, No. three photodetectors 53, No. four photodetectors 54 is all connected with central processing unit 7 through signal processor 6.
Described A light source 11 is connected with fibre optic temperature sensor 31 of A, No. bis-fibre optic temperature sensors 32 of A, No. tri-fibre optic temperature sensors 33 of A, No. tetra-fibre optic temperature sensors 34 of A after No. A 1 × 4 fiber coupler 21;
Described B light source 12 is connected with fibre optic temperature sensor 35 of B, No. bis-fibre optic temperature sensors 36 of B, No. tri-fibre optic temperature sensors 37 of B, No. tetra-fibre optic temperature sensors 38 of B after No. B 1 × 4 fiber coupler 22;
Described C light source 13 is connected with fibre optic temperature sensor 39 of C, No. bis-fibre optic temperature sensors 310 of C, No. tri-fibre optic temperature sensors 311 of C, No. tetra-fibre optic temperature sensors 312 of C after No. C 1 × 4 fiber coupler 23;
Described D light source 14 is connected with fibre optic temperature sensor 313 of D, No. bis-fibre optic temperature sensors 314 of D, No. tri-fibre optic temperature sensors 315 of D, No. tetra-fibre optic temperature sensors 316 of D after No. D 1 × 4 fiber coupler 24.
Fibre optic temperature sensor 31 of described A, fibre optic temperature sensor 35 of B, fibre optic temperature sensor 39 of C, fibre optic temperature sensor 313 of D are connected with one end of a photodetector 51 after 1 × 4 fiber coupler 25;
No. bis-fibre optic temperature sensors 32 of described A, No. bis-fibre optic temperature sensors 36 of B, No. bis-fibre optic temperature sensors 310 of C, No. bis-fibre optic temperature sensors 314 of D are connected with one end of No. two photodetectors 52 after No. two 1 × 4 fiber couplers 26;
No. tri-fibre optic temperature sensors 33 of described A, No. tri-fibre optic temperature sensors 37 of B, No. tri-fibre optic temperature sensors 311 of C, No. tri-fibre optic temperature sensors 315 of D are connected with one end of No. three photodetectors 53 after No. three 1 × 4 fiber couplers 27;
No. tetra-fibre optic temperature sensors 34 of described A, No. tetra-fibre optic temperature sensors 38 of B, No. tetra-fibre optic temperature sensors 312 of C, No. tetra-fibre optic temperature sensors 316 of D are connected with one end of No. four photodetectors 54 after No. four 1 × 4 fiber couplers 28.
The other end of a described photodetector 51, No. two photodetectors 52, No. three photodetectors 53, No. four photodetectors 54 is all connected with 485 signal wires or CAN bus successively after signal processor 6, central processing unit 7.
Described A light source 11, B light source 12, C light source 13, D light source 14 are all LED or LD light source.
A using method for above-mentioned tree type optical fiber temperature transducer system, described using method comprises the following steps:
The first step: A light source 11 is opened, B light source 12, C light source 13, D light source 14 is closed, and No. one temperature measuring optical cable A starts thermometric: the light that A light source 11 sends is first through ovennodulation, is more evenly divided into four bundles to enter respectively fibre optic temperature sensor 31 of A, No. bis-fibre optic temperature sensors 32 of A, No. tri-fibre optic temperature sensors 33 of A, in No. tetra-fibre optic temperature sensors 34 of A, then by fibre optic temperature sensor 31 of A, No. bis-fibre optic temperature sensors 32 of A, No. tri-fibre optic temperature sensors 33 of A, No. tetra-fibre optic temperature sensors 34 of A respectively output optical signal enter a corresponding photodetector 51, No. two photodetectors 52, No. three photodetectors 53, No. four photodetectors 54 are to carry out opto-electronic conversion, and the signal after opto-electronic conversion enters central processing unit 7 to process one by one through signal processor 6 again, and now, central processing unit 7 is to fibre optic temperature sensor 31 of A, No. bis-fibre optic temperature sensors 32 of A, No. tri-fibre optic temperature sensors 33 of A, fixed point monitoring is realized in No. tetra-fibre optic temperature sensors 34 of A address separately,
Second step: B light source 12 is opened, A light source 11, C light source 13, D light source 14 are closed, and No. one temperature measuring optical cable A finishes thermometric, and No. two temperature measuring optical cable B starts thermometric; C light source 13 is opened, and A light source 11, B light source 12, D light source 14 are closed, and No. two temperature measuring optical cable B finishes thermometric, and No. three temperature measuring optical cable C starts thermometric; D light source 14 is opened, and A light source 11, B light source 12, C light source 13 are closed, and No. three temperature measuring optical cable C finishes thermometric, and No. four temperature measuring optical cable D starts thermometric; A light source 11 is opened, and B light source 12, C light source 13, D light source 14 are closed, and No. four temperature measuring optical cable D finishes thermometric, and No. one temperature measuring optical cable A starts thermometric, carries out in turn successively; The thermometric operation of described No. two temperature measuring optical cable B, No. three temperature measuring optical cable C, No. four temperature measuring optical cable D is identical with the thermometric operation of a temperature measuring optical cable A.
Be 800ms the luminous interval time of described A light source 11, B light source 12, C light source 13, D light source 14.
Described light source is connected with fibre optic temperature sensor through 1 × 4 fiber coupler, described fibre optic temperature sensor is connected with photodetector through 1 × 4 fiber coupler, and all adopts communication stage optical fiber cable 4 to connect between light source, 1 × 4 fiber coupler, fibre optic temperature sensor, photodetector.
Principle of the present invention is described as follows:
The temperature sensor that conventional temperature sensor system adopts is taking electric signal as working foundation, as thermopair, thermistor, pyroelectric detector equitemperature sensor.Under strong electromagnetic or inflammable and explosive occasion, the conventional temperature sensor based on electric signal measurement be just very restricted and electronic devices and components easily aging, make moist, easily produce wrong report even malfunctioning.
The present invention not only can in one plane monitor respectively the nearly temperature of 16 location points, and can many cover native systems be installed simultaneously according to application places size, realize omnibearing temperature survey, without dead angle, and have that cost is low, the many and high feature of reliability of function.Totally have the following advantages:
1. temperature sensing and signal transmission all adopt optical fiber, essential safety;
2. temp probe does not have electronic devices and components, has solved electronic devices and components because of moist and the aging wrong report causing and Its Failures;
3. fibre optic temperature sensor is simple in structure, volume is little, quality gently makes native system installation, production, easy to maintenance, maintenance cost is low;
4. the response time short, highly sensitive, reusable, do not fear pollution, acid and alkali-resistance;
5. adopt warm spot many, 16 fibre optic temperature sensors are worked respectively, survey the temperature of diverse location point;
6. fibre optic temperature sensor quantity can be adjusted at random, increases or reduce system fibre optic temperature sensor number according to needs;
7. adopt the output of 485 signal wires or CAN digital signal, the expansion that facilitates system be connected;
8. point type location, staff can react rapidly according to the address of each sensor;
9. adopt 1 × 4 light splitting, close light technology, saved optical fiber and cost, and be conducive to the identification of optical fiber type temperature sensor address;
10. can Intelligent Recognition fibercuts position.
In addition, the present invention includes four temperature measuring optical cables (each temperature measuring optical cable comprises four fibre optic temperature sensors), four photodetectors and eight 1 × 4 fiber couplers, each light source is connected by 1 × 4 fiber coupler, four fibre optic temperature sensors corresponding with it, in four temperature measuring optical cables, respectively there is a fibre optic temperature sensor to be connected by same 1 × 4 fiber coupler photodetector corresponding with it, but this is optimal design of the present invention, do not mean that amount of parts of the present invention is only defined in this.From the present invention, the quantity (quantity of light source) of temperature measuring optical cable, the quantity of fibre optic temperature sensor in each temperature measuring optical cable, the quantity (refering in particular to the fiber coupler between fibre optic temperature sensor and photodetector) of fiber coupler, the quantity of photodetector is all with the light splitting of fiber coupler or to close light quantity identical, at least be also proportional relation, thereby, if the quantity of temperature measuring optical cable is less than 4, the quantity of the fibre optic temperature sensor that each temperature measuring optical cable comprises, the quantity (refering in particular to the fiber coupler between fibre optic temperature sensor and photodetector) of fiber coupler, the quantity of photodetector, fiber coupler light splitting or the quantity of closing light all can correspondingly reduce, in like manner, if the quantity of temperature measuring optical cable is more than 4, the quantity of the fibre optic temperature sensor that each temperature measuring optical cable comprises, the quantity (refering in particular to the fiber coupler between fibre optic temperature sensor and photodetector) of fiber coupler, the quantity of photodetector, fiber coupler light splitting or the quantity of closing light all can correspondingly increase.
Embodiment 1:
A kind of tree type optical fiber temperature transducer system, comprise temperature measuring optical cable A, No. two temperature measuring optical cable B, No. three temperature measuring optical cable C, No. four temperature measuring optical cable D, signal processor 6 and central processing units 7, a described temperature measuring optical cable A comprises A light source 11, fibre optic temperature sensor 31 of A, No. bis-fibre optic temperature sensors 32 of A, No. tri-fibre optic temperature sensors of A 33 and No. tetra-fibre optic temperature sensors 34 of A; Described No. two temperature measuring optical cable B comprise B light source 12, fibre optic temperature sensor 35 of B, No. bis-fibre optic temperature sensors 36 of B, No. tri-fibre optic temperature sensors of B 37 and No. tetra-fibre optic temperature sensors 38 of B; Described No. three temperature measuring optical cable C comprise C light source 13, fibre optic temperature sensor 39 of C, No. bis-fibre optic temperature sensors 310 of C, No. tri-fibre optic temperature sensors of C 311 and No. tetra-fibre optic temperature sensors 312 of C; Described No. four temperature measuring optical cable D comprise D light source 14, fibre optic temperature sensor 313 of D, No. bis-fibre optic temperature sensors 314 of D, No. tri-fibre optic temperature sensors of D 315 and No. tetra-fibre optic temperature sensors 316 of D; Described A light source 11, B light source 12, C light source 13, D light source 14 are all LED or LD light source;
Described A light source 11 is connected with fibre optic temperature sensor 31 of A, No. bis-fibre optic temperature sensors 32 of A, No. tri-fibre optic temperature sensors 33 of A, No. tetra-fibre optic temperature sensors 34 of A after No. A 1 × 4 fiber coupler 21; Described B light source 12 is connected with fibre optic temperature sensor 35 of B, No. bis-fibre optic temperature sensors 36 of B, No. tri-fibre optic temperature sensors 37 of B, No. tetra-fibre optic temperature sensors 38 of B after No. B 1 × 4 fiber coupler 22; Described C light source 13 is connected with fibre optic temperature sensor 39 of C, No. bis-fibre optic temperature sensors 310 of C, No. tri-fibre optic temperature sensors 311 of C, No. tetra-fibre optic temperature sensors 312 of C after No. C 1 × 4 fiber coupler 23; Described D light source 14 is connected with fibre optic temperature sensor 313 of D, No. bis-fibre optic temperature sensors 314 of D, No. tri-fibre optic temperature sensors 315 of D, No. tetra-fibre optic temperature sensors 316 of D after No. D 1 × 4 fiber coupler 24;
Fibre optic temperature sensor 31 of described A, fibre optic temperature sensor 35 of B, fibre optic temperature sensor 39 of C, fibre optic temperature sensor 313 of D are connected with one end of a photodetector 51 after 1 × 4 fiber coupler 25; No. bis-fibre optic temperature sensors 32 of described A, No. bis-fibre optic temperature sensors 36 of B, No. bis-fibre optic temperature sensors 310 of C, No. bis-fibre optic temperature sensors 314 of D are connected with one end of No. two photodetectors 52 after No. two 1 × 4 fiber couplers 26; No. tri-fibre optic temperature sensors 33 of described A, No. tri-fibre optic temperature sensors 37 of B, No. tri-fibre optic temperature sensors 311 of C, No. tri-fibre optic temperature sensors 315 of D are connected with one end of No. three photodetectors 53 after No. three 1 × 4 fiber couplers 27; No. tetra-fibre optic temperature sensors 34 of described A, No. tetra-fibre optic temperature sensors 38 of B, No. tetra-fibre optic temperature sensors 312 of C, No. tetra-fibre optic temperature sensors 316 of D are connected with one end of No. four photodetectors 54 after No. four 1 × 4 fiber couplers 28;
The other end of a described photodetector 51, No. two photodetectors 52, No. three photodetectors 53, No. four photodetectors 54 is all connected with 485 signal wires or CAN bus successively after signal processor 6, central processing unit 7; Between described light source, 1 × 4 fiber coupler, fibre optic temperature sensor, photodetector, all adopt communication stage optical fiber cable 4 to connect.
A using method for above-mentioned tree type optical fiber temperature transducer system, comprises the following steps:
The first step: A light source 11 is opened, B light source 12, C light source 13, D light source 14 is closed, and No. one temperature measuring optical cable A starts thermometric: the light that A light source 11 sends is first through ovennodulation, is more evenly divided into four bundles to enter respectively fibre optic temperature sensor 31 of A, No. bis-fibre optic temperature sensors 32 of A, No. tri-fibre optic temperature sensors 33 of A, in No. tetra-fibre optic temperature sensors 34 of A, then by fibre optic temperature sensor 31 of A, No. bis-fibre optic temperature sensors 32 of A, No. tri-fibre optic temperature sensors 33 of A, No. tetra-fibre optic temperature sensors 34 of A respectively output optical signal enter a corresponding photodetector 51, No. two photodetectors 52, No. three photodetectors 53, No. four photodetectors 54 are to carry out opto-electronic conversion, and the signal after opto-electronic conversion enters central processing unit 7 to process one by one through signal processor 6 again, and now, central processing unit 7 is to fibre optic temperature sensor 31 of A, No. bis-fibre optic temperature sensors 32 of A, No. tri-fibre optic temperature sensors 33 of A, fixed point monitoring is realized in No. tetra-fibre optic temperature sensors 34 of A address separately,
Second step: B light source 12 is opened, A light source 11, C light source 13, D light source 14 are closed, and No. one temperature measuring optical cable A finishes thermometric, and No. two temperature measuring optical cable B starts thermometric; C light source 13 is opened, and A light source 11, B light source 12, D light source 14 are closed, and No. two temperature measuring optical cable B finishes thermometric, and No. three temperature measuring optical cable C starts thermometric; D light source 14 is opened, and A light source 11, B light source 12, C light source 13 are closed, and No. three temperature measuring optical cable C finishes thermometric, and No. four temperature measuring optical cable D starts thermometric; A light source 11 is opened, and B light source 12, C light source 13, D light source 14 are closed, and No. four temperature measuring optical cable D finishes thermometric, and No. one temperature measuring optical cable A starts thermometric, carries out in turn successively; The thermometric operation of described No. two temperature measuring optical cable B, No. three temperature measuring optical cable C, No. four temperature measuring optical cable D is identical with the thermometric operation of a temperature measuring optical cable A; Be generally 800ms the luminous interval time of described A light source 11, B light source 12, C light source 13, D light source 14.
In summary, four temperature sensings that temperature measuring optical cable A comprises are put a corresponding fibre optic temperature sensor 31, No. two fibre optic temperature sensors 32, No. three fibre optic temperature sensors 33, the temperature signal that No. four fibre optic temperature sensors 34 detect is separate, non-interfering, can carry out accurate Address Recognition, thereby realize fixed point monitoring, in the same way, a temperature measuring optical cable A, No. two temperature measuring optical cable B, No. three temperature measuring optical cable C, the temperature signal that in No. four temperature measuring optical cable D, included 16 fibre optic temperature sensors altogether detect is all separate, non-interfering, can carry out accurate Address Recognition, thereby jointly complete the temperature monitoring to diverse location point.
The present invention is a kind of, and to set the concrete applicable cases of type optical fiber temperature transducer system as follows:
1, be applied to the temperature monitoring system of silo, tobacco, coal.Because grain, tobacco, coal are many, volume is large, and their stacking volumes are large, and temperature easily raises and causes accident to occur, and the temperature of diverse location is different, must carry out multimetering.This system architecture is simple, be easy to expansion, adopt warm spot number can adjust as required.An optical fiber temperature transducer system can be monitored the temperature of 16 location points simultaneously, has saved to greatest extent multimetering cost.Employing 485 or the output of CAN digital signal, convenient with from outside equipment connection, be convenient to the expansion of system performance.
2, be applied to the other types such as food, chemical industry warehouse.Inflammable, explosive goods is stacked in these places throughout the year, and existing temp measuring system is arranged on and in warehouse, has circuit and the device short circuit of electronics unit, the aging hidden danger of bringing.This system adopts optical fiber technology to carry out temperature survey and signal transmission, avoids using circuit and electronic devices and components, essential safety, the monitoring temperature in very applicable this class place.
Claims (8)
1. a tree type optical fiber temperature transducer system, comprise temperature sensor assembly, signal processor (6) and central processing unit (7), one end of described signal processor (6) is connected with temperature sensor assembly, and the other end is connected with central processing unit (7), it is characterized in that:
Described temperature sensor assembly comprises a temperature measuring optical cable (A), No. two temperature measuring optical cables (B), No. three temperature measuring optical cables (C) and No. four temperature measuring optical cables (D);
A described temperature measuring optical cable (A) comprises A light source (11), a fibre optic temperature sensor of A (31), No. bis-fibre optic temperature sensors of A (32), No. tri-fibre optic temperature sensors of A (33) and No. tetra-fibre optic temperature sensors of A (34);
Described No. two temperature measuring optical cables (B) comprise B light source (12), a fibre optic temperature sensor of B (35), No. bis-fibre optic temperature sensors of B (36), No. tri-fibre optic temperature sensors of B (37) and No. tetra-fibre optic temperature sensors of B (38);
Described No. three temperature measuring optical cables (C) comprise C light source (13), a fibre optic temperature sensor of C (39), No. bis-fibre optic temperature sensors of C (310), No. tri-fibre optic temperature sensors of C (311) and No. tetra-fibre optic temperature sensors of C (312);
Described No. four temperature measuring optical cables (D) comprise D light source (14), a fibre optic temperature sensor of D (313), No. bis-fibre optic temperature sensors of D (314), No. tri-fibre optic temperature sensors of D (315) and No. tetra-fibre optic temperature sensors of D (316);
Described A light source (11), B light source (12), C light source (13), D light source (14) are connected with one end of a photodetector (51) respectively after a fibre optic temperature sensor of corresponding A (31), a fibre optic temperature sensor of B (35), a fibre optic temperature sensor of C (39), a fibre optic temperature sensor of D (313);
Described A light source (11), B light source (12), C light source (13), D light source (14) are connected with one end of No. two photodetectors (52) respectively after No. bis-fibre optic temperature sensors of corresponding A (32), No. bis-fibre optic temperature sensors of B (36), No. bis-fibre optic temperature sensors of C (310), No. bis-fibre optic temperature sensors of D (314);
Described A light source (11), B light source (12), C light source (13), D light source (14) are connected with one end of No. three photodetectors (53) respectively after No. tri-fibre optic temperature sensors of corresponding A (33), No. tri-fibre optic temperature sensors of B (37), No. tri-fibre optic temperature sensors of C (311), No. tri-fibre optic temperature sensors of D (315);
Described A light source (11), B light source (12), C light source (13), D light source (14) are connected with one end of No. four photodetectors (54) respectively after No. tetra-fibre optic temperature sensors of corresponding A (34), No. tetra-fibre optic temperature sensors of B (38), No. tetra-fibre optic temperature sensors of C (312), No. tetra-fibre optic temperature sensors of D (316);
The other end of a described photodetector (51), No. two photodetectors (52), No. three photodetectors (53), No. four photodetectors (54) is all connected with central processing unit (7) through signal processor (6).
2. a kind of tree type optical fiber temperature transducer system according to claim 1, is characterized in that:
Described A light source (11) is connected with a fibre optic temperature sensor of A (31), No. bis-fibre optic temperature sensors of A (32), No. tri-fibre optic temperature sensors of A (33), No. tetra-fibre optic temperature sensors of A (34) after No. A 1 × 4 fiber coupler (21);
Described B light source (12) is connected with a fibre optic temperature sensor of B (35), No. bis-fibre optic temperature sensors of B (36), No. tri-fibre optic temperature sensors of B (37), No. tetra-fibre optic temperature sensors of B (38) after No. B 1 × 4 fiber coupler (22);
Described C light source (13) is connected with a fibre optic temperature sensor of C (39), No. bis-fibre optic temperature sensors of C (310), No. tri-fibre optic temperature sensors of C (311), No. tetra-fibre optic temperature sensors of C (312) after No. C 1 × 4 fiber coupler (23);
Described D light source (14) is connected with a fibre optic temperature sensor of D (313), No. bis-fibre optic temperature sensors of D (314), No. tri-fibre optic temperature sensors of D (315), No. tetra-fibre optic temperature sensors of D (316) after No. D 1 × 4 fiber coupler (24).
3. a kind of tree type optical fiber temperature transducer system according to claim 1, is characterized in that:
A fibre optic temperature sensor of described A (31), a fibre optic temperature sensor of B (35), a fibre optic temperature sensor of C (39), a fibre optic temperature sensor of D (313) are connected with one end of a photodetector (51) after 1 × 4 fiber coupler (25);
No. bis-fibre optic temperature sensors of described A (32), No. bis-fibre optic temperature sensors of B (36), No. bis-fibre optic temperature sensors of C (310), No. bis-fibre optic temperature sensors of D (314) are connected with one end of No. two photodetectors (52) after No. two 1 × 4 fiber couplers (26);
No. tri-fibre optic temperature sensors of described A (33), No. tri-fibre optic temperature sensors of B (37), No. tri-fibre optic temperature sensors of C (311), No. tri-fibre optic temperature sensors of D (315) are connected with one end of No. three photodetectors (53) after No. three 1 × 4 fiber couplers (27);
No. tetra-fibre optic temperature sensors of described A (34), No. tetra-fibre optic temperature sensors of B (38), No. tetra-fibre optic temperature sensors of C (312), No. tetra-fibre optic temperature sensors of D (316) are connected with one end of No. four photodetectors (54) after No. four 1 × 4 fiber couplers (28).
4. according to the one tree type optical fiber temperature transducer system described in claim 1,2 or 3, it is characterized in that: the other end of a described photodetector (51), No. two photodetectors (52), No. three photodetectors (53), No. four photodetectors (54) is all connected with 485 signal wires or CAN bus successively after signal processor (6), central processing unit (7).
5. according to the one tree type optical fiber temperature transducer system described in claim 1,2 or 3, it is characterized in that: described A light source (11), B light source (12), C light source (13), D light source (14) are all LED or LD light source.
6. a using method for tree type optical fiber temperature transducer system claimed in claim 1, is characterized in that described using method comprises the following steps:
The first step: A light source (11) is opened, B light source (12), C light source (13), D light source (14) is closed, and a temperature measuring optical cable (A) starts thermometric: the light that A light source (11) sends is first through ovennodulation, is more evenly divided into four bundles to enter respectively a fibre optic temperature sensor of A (31), No. bis-fibre optic temperature sensors of A (32), No. tri-fibre optic temperature sensors of A (33), in No. tetra-fibre optic temperature sensors of A (34), then by a fibre optic temperature sensor of A (31), No. bis-fibre optic temperature sensors of A (32), No. tri-fibre optic temperature sensors of A (33), No. tetra-fibre optic temperature sensors of A (34) respectively output optical signal enter a corresponding photodetector (51), No. two photodetectors (52), No. three photodetectors (53), No. four photodetectors (54) are to carry out opto-electronic conversion, and the signal after opto-electronic conversion enters central processing unit (7) to process one by one through signal processor (6) again, and now, central processing unit (7) is to a fibre optic temperature sensor of A (31), No. bis-fibre optic temperature sensors of A (32), No. tri-fibre optic temperature sensors of A (33), fixed point monitoring is realized in No. tetra-fibre optic temperature sensors of A (34) address separately,
Second step: B light source (12) is opened, and A light source (11), C light source (13), D light source (14) are closed, a temperature measuring optical cable (A) finishes thermometric, and No. two temperature measuring optical cables (B) start thermometric; C light source (13) is opened, and A light source (11), B light source (12), D light source (14) are closed, and No. two temperature measuring optical cables (B) finish thermometric, and No. three temperature measuring optical cables (C) start thermometric; D light source (14) is opened, and A light source (11), B light source (12), C light source (13) are closed, and No. three temperature measuring optical cables (C) finish thermometric, and No. four temperature measuring optical cables (D) start thermometric; A light source (11) is opened, and B light source (12), C light source (13), D light source (14) are closed, and No. four temperature measuring optical cables (D) finish thermometric, and a temperature measuring optical cable (A) starts thermometric, carries out in turn successively; The thermometric operation of described No. two temperature measuring optical cables (B), No. three temperature measuring optical cables (C), No. four temperature measuring optical cables (D) is identical with the thermometric operation of a temperature measuring optical cable (A).
7. a kind of using method of setting type optical fiber temperature transducer system according to claim 6, is characterized in that: be 800ms the luminous interval time of described A light source (11), B light source (12), C light source (13), D light source (14).
8. a kind of using method of setting type optical fiber temperature transducer system according to claim 6, is characterized in that:
Described A light source (11) is connected with a fibre optic temperature sensor of A (31), No. bis-fibre optic temperature sensors of A (32), No. tri-fibre optic temperature sensors of A (33), No. tetra-fibre optic temperature sensors of A (34) after communication stage optical fiber cable (4), No. A 1 × 4 fiber coupler (21), communication stage optical fiber cable (4);
Described B light source (12) is connected with a fibre optic temperature sensor of B (35), No. bis-fibre optic temperature sensors of B (36), No. tri-fibre optic temperature sensors of B (37), No. tetra-fibre optic temperature sensors of B (38) after communication stage optical fiber cable (4), No. B 1 × 4 fiber coupler (22), communication stage optical fiber cable (4);
Described C light source (13) is connected with a fibre optic temperature sensor of C (39), No. bis-fibre optic temperature sensors of C (310), No. tri-fibre optic temperature sensors of C (311), No. tetra-fibre optic temperature sensors of C (312) after communication stage optical fiber cable (4), No. C 1 × 4 fiber coupler (23), communication stage optical fiber cable (4);
Described D light source (14) is connected with a fibre optic temperature sensor of D (313), No. bis-fibre optic temperature sensors of D (314), No. tri-fibre optic temperature sensors of D (315), No. tetra-fibre optic temperature sensors of D (316) after communication stage optical fiber cable (4), No. D 1 × 4 fiber coupler (24), communication stage optical fiber cable (4);
A fibre optic temperature sensor of described A (31), a fibre optic temperature sensor of B (35), a fibre optic temperature sensor of C (39), a fibre optic temperature sensor of D (313) are connected with one end of a photodetector (51) after communication stage optical fiber cable (4), 1 × 4 fiber coupler (25), communication stage optical fiber cable (4);
No. bis-fibre optic temperature sensors of described A (32), No. bis-fibre optic temperature sensors of B (36), No. bis-fibre optic temperature sensors of C (310), No. bis-fibre optic temperature sensors of D (314) are connected with one end of No. two photodetectors (52) after communication stage optical fiber cable (4), No. two 1 × 4 fiber couplers (26), communication stage optical fiber cable (4);
No. tri-fibre optic temperature sensors of described A (33), No. tri-fibre optic temperature sensors of B (37), No. tri-fibre optic temperature sensors of C (311), No. tri-fibre optic temperature sensors of D (315) are connected with one end of No. three photodetectors (53) after communication stage optical fiber cable (4), No. three 1 × 4 fiber couplers (27), communication stage optical fiber cable (4);
No. tetra-fibre optic temperature sensors of described A (34), No. tetra-fibre optic temperature sensors of B (38), No. tetra-fibre optic temperature sensors of C (312), No. tetra-fibre optic temperature sensors of D (316) are connected with one end of No. four photodetectors (54) after communication stage optical fiber cable (4), No. four 1 × 4 fiber couplers (28), communication stage optical fiber cable (4).
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Address after: 430000 unit 1, floor 1-5, building 3-11, phase III, optical core center, 303 Guanggu Avenue, Donghu New Technology Development Zone, Wuhan City, Hubei Province Patentee after: WUHAN NEWFIBER PHOTOELECTRIC Co.,Ltd. Address before: 430074 unit 2, building 1, Wenhua building, optical valley core center, No. 111, Guanggu Avenue, Wuhan, Hubei Province Patentee before: WUHAN NEWFIBER OPTOELECTRONIC TECHNOLOGY Co.,Ltd. |