CN202795641U - Reflecting type point-pattern optical fiber smoke and temperature sensing fire detector - Google Patents
Reflecting type point-pattern optical fiber smoke and temperature sensing fire detector Download PDFInfo
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- CN202795641U CN202795641U CN 201220382938 CN201220382938U CN202795641U CN 202795641 U CN202795641 U CN 202795641U CN 201220382938 CN201220382938 CN 201220382938 CN 201220382938 U CN201220382938 U CN 201220382938U CN 202795641 U CN202795641 U CN 202795641U
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Abstract
The utility model discloses a reflecting type point-pattern optical fiber smoke and temperature sensing fire detector, comprising a front-end detecting part and a background processing part, wherein the front-end detecting part comprises a smoke room, transmitting/reflecting card racks, a reflecting film, a temperature sensing temperature, transmitting/receiving optical cables and a hard plastic pipe; the background processing part comprises a light source, a light source modulator and a signal detecting processor; the light source is either a green light emitting diode (LED) or a green light laser; the transmitting/receiving optical cables are communication-stage plastic optical cables with one end horizontal with a top end opening of the hard plastic pipe while the other ends respectively connected with the light source and the signal detecting processor; the reflecting film is arranged on the side face of the reflecting card rack; the same smoke room is covered outside the transmitting/reflecting card racks and the hard plastic pipe; and the temperature sensing device is arranged in the smoke room. The design not only can avoid an electronic component and can be applied to flammable and combustible places with high intensity of electromagnetic radiation, but can simultaneously satisfy demands of fire protection and alarm products which are capable of detecting the smoke and the temperature; and the reflecting type point-pattern optical fiber smoke and temperature sensing fire detector is high in sensitivity and low in costs of production and maintenance.
Description
Technical field
The utility model relates to a kind of an automatic equipment which can report a fire, relate in particular to a kind of reflective some type optical fiber smoke-temperature sensing fire detector, specifically be applicable to eliminate electronic devices and components defective, reduce cost, improve sensitivity, maintain easily, have great practicality.
Background technology
At present, the point type combined type smoke-temperature sensing fire detector that is used on the automatic fire alarm both at home and abroad mainly is photo-electric point type combined type smoke-temperature sensing fire detector, in use there are many problems in it, is difficult to satisfy the needs of automatic fire alarm in the current fire-fighting.
The problem that traditional some type combined type smoke-temperature sensing fire detector exists is:
Because electric signal is arranged, be unsuitable for installing in inflammable and explosive, the large place of electromagnetic radiation intensity, there is certain potential safety hazard
Electronic devices and components are easily aging, the aging rear wrong report even malfunctioning that easily produces
The detector cost is high, and dust cleans inconvenient, and later maintenance cost is high
Poor sealing, is got rusty at the easy short circuit of components and parts under wet environment, has larger potential safety hazard.
The utility model content
The purpose of this utility model be overcome that the employing electronic devices and components that exist in the prior art survey that smog/temperature, complex structure, production maintenance cost are very high, corrosion resistance and bad defective and the problem of moisture-proof, provide a kind of stop electronic devices and components survey smog/temperature, simple in structure, the production maintenance cost is very low, corrosion resistance and moisture-proof reflective some type optical fiber smoke-temperature sensing fire detector preferably.
For realizing above purpose, technical solution of the present utility model is: reflective some type optical fiber smoke-temperature sensing fire detector, comprise light source, emission optical cable, receive optical cable and input processor, described light source is connected with the emission optical cable after the light modulator modulation, described input processor is connected with the reception optical cable, described emission optical cable, reception optical cable are the same optical cables, and its inside all is wrapped with optical fiber;
Described reflective some type optical fiber smoke-temperature sensing fire detector also comprises emission card holder, reflection card holder, reflectance coating and temperature sensing device, described light source is green light LED or green (light) laser, described emission optical cable, reception optical cable are the communication stage plastic optical fiber cable, and described optical fiber is the communication stage plastic optical fiber;
Described emission optical cable, the reception optical cable is arranged side by side the inside in plastic conduit, the emission optical cable, the end face that receives optical cable one end is all mutually concordant with the top end opening of plastic conduit, the other end of emission optical cable is connected with light source behind the tail end opening of plastic conduit, the other end that receives optical cable is connected with the input processor behind the tail end opening of plastic conduit, be positioned at top end opening on the outside of described plastic conduit, position between the tail end opening is set with the emission card holder, top end opening is positioned at the emission card holder, between the reflection card holder, be provided with the reflectance coating corresponding with top end opening on the side of reflection card holder; The outside of described emission card holder, reflection card holder plastic conduit, temperature sensing device all is covered with same smoke-box, and this smoke-box is closed reticulate texture.
Described temperature sensing device comprises interconnective temperature-sensing element and light barrier; The top of described reflectance coating is provided with light barrier, and the temperature-sensing element that arranges on an end of light barrier and the reflection card holder side is connected, and the other end extends between reflectance coating, the top end opening, and temperature-sensing element near reflex film arranges, and temperature-sensing element is temperature-sensitive deformation element.
Described temperature sensing device comprises interconnective temperature-sensing element and light barrier; The top of described top end opening is provided with light barrier, the temperature-sensing element that arranges on one end of light barrier and the plastic conduit side is connected, the other end extends between reflectance coating, the top end opening, the nearly top end opening setting of temperature-sensing element, and temperature-sensing element is temperature-sensitive deformation element.
The power of the green light LED that described light source adopts is 20 milliwatts, and operating voltage is less than 3V, and working current is less than 10 milliamperes.
Described emission optical cable, the diameter that receives the optical cable inner fiber are 1 millimeter, and the distance between described reflectance coating, the top end opening is 2.5 millimeters of 2 –, on the described light barrier between reflectance coating, top end opening the length of part less than 2 millimeters.
The manufactured materials of described light barrier is metal, and its thickness is less than or equal to 0.1 millimeter.
The reflectivity of described reflectance coating 〉=95%, thickness are less than 0.2 millimeter, and area is less than 30 square millimeters; The manufactured materials of described plastic conduit is PP plastics or ABS plastic.
The aperture of described smoke-box is less than 1 millimeter, and thickness is less than 0.3 millimeter.
Described smoke-box, emission card holder, reflection card holder, reflectance coating, emission optical cable, reception optical cable, plastic conduit, temperature sensing device are integrated into front end detection section, described light source, light modulator, input processor are integrated into background process section, and front end detection section and background process section are separate.
The quantity of described background process section is one, and the quantity of described front end detection section is at least one.
Compared with prior art, the beneficial effects of the utility model are:
1, be responsible for smog/temperature sensing in reflective type optical fiber of the utility model smoke-temperature sensing fire detector, the front end detection section of communication comprises the emission optical cable, receive optical cable, the emission card holder, the reflection card holder, reflectance coating, temperature sensing device, plastic conduit and smoke-box, do not comprise any electronic devices and components, essence is very safe, thoroughly eliminated the electric signal that has that electronic devices and components bring, the defective that easily wears out, so that the utility model not only can be inflammable and explosive, install in the place that electromagnetic radiation intensity is large, there is not potential safety hazard, but also be difficult for wearing out, can not occur because of the aging wrong report that causes or malfunctioning situation; In addition, the emission optical cable that the utility model adopts, receive optical cable and be plastic optical fiber cable, be not subjected to electromagnetic interference (EMI) fully, so that the place that the utility model spy is suitable for is inflammable and explosive, electromagnetic radiation intensity is large.Therefore the utility model can be stopped electronic devices and components and survey smog/temperature, be difficult for aging, the place that the spy is applicable to is inflammable and explosive, electromagnetic radiation intensity is large.
2, adopt green light LED or green (light) laser as light source in reflective type optical fiber of the utility model smoke-temperature sensing fire detector, adopt the communication stage plastic optical fiber cable to make emission optical cable and reception optical cable, the advantage of green light LED and the collocation of communication stage plastic optical fiber cable is as follows: at first, under the Same Efficieney condition, the distance that green light LED transmits in the communication stage plastic optical fiber cable can reach 350 meters of one way 300 – farthest; Secondly, the price of green light LED is very cheap, operating voltage is little, and can satisfy fire protection warning product regulation supply voltage is that 24V, product standby power supply must satisfy the requirement of powering continually and steadily more than 8 hours after the dispatch from foreign news agency outage, and, LED utilizes the charge carrier spontaneous radiation recombination luminescence that is injected with the source region, do not have threshold property, be not vulnerable to voltage fluctuation and temperature fluctuation impact, stability is stronger, but more than the continuous working 100,000 hours (about 11.5), the life-span is very long; Again, the communication stage plastic optical fiber cable is attenuation coefficient≤0.2dB/m not only, transmission range is longer, and the diameter of the optical fiber of its parcel is 1mm, there is enough large area to allow optically-coupled as much as possible advance fibre core and transmits, can improve light intensity and transmission range, in addition, the communication stage plastic optical fiber cable is compared with the quartzy optical cable of communication stage commonly used, and price only has 1/10th; At last, can the be multiplexing a plurality of front end detection of 1 green light LED section, thereby can further reduce cost.In addition, adopt green (light) laser to comprise as the advantage of light source: power density is large, the output optical alignment is good, light energy output better is coupled into plastic optical fiber (cable), transmission range is far away than the green light LED of Same Efficieney in plastic optical fiber (cable), equally, also can the be multiplexing a plurality of front end detection of 1 green (light) laser section also can further reduce cost.Therefore not only cost is very low, transmission range is long for the utility model, and stability by force, can satisfy in the fire protection warning product needs to transmission range.
3; the temperature sensing device of taking in reflective type optical fiber of the utility model smoke-temperature sensing fire detector comprises temperature-sensing element and light barrier; and temperature-sensing element is temperature-sensitive deformation element; it utilizes the principle of fiber reflection to carry out temperature-sensitive; that is: the light of emission optical cable emission is injected the reception optical cable after the reflectance coating reflection; simultaneously; closure preferably smoke-box passes to temperature-sensing element with the temperature of surrounding environment; when temperature rose, temperature-sensing element can produce deformation gradually and bending drives light barrier to move down simultaneously; and block reflectance coating; die down thereby cause receiving the light intensity that optical cable receives, and then the light intensity that causes delivering to the input processor dies down, come detecting temperature by the variation of light intensity; not only the reaction time is very short; sensitivity is higher; the alarm temperature error can be controlled at ± 2 ℃ in, and simple in structure, be convenient to produce and safeguard; cost is lower; in addition, the closure of smoke-box is better, not only can improve the sensitivity of indoor temperature-sensing element temperature-sensitive; and can protect preferably indoor part, security is higher.Therefore not only sensitivity is higher, simple in structure for the utility model, and the temperature alarming value can arrange arbitrarily in 85 ℃ of 40 ℃ –, and the production maintenance cost is very low, security is higher.
4; reflective type optical fiber of the utility model smoke-temperature sensing fire detector is in the emission card holder; the reflection card holder; plastic conduit; the outside of temperature sensing device all is covered with same closed cancellated smoke-box; this smoke-box not only can prevent that the exotics such as insect from entering; satisfy the requirement of the smoke fire detector that proposes among the GB14003 – 2005; sealing is strong; corrosion resistance and moisture-proof are better; even components and parts also are difficult for short circuit under wet environment; get rusty; potential safety hazard is very little; and can work the effect of gathering to the smog in the smoke-box; be convenient to improve the relative concentration of smog in the smoke-box; thereby raising detector sensitivity; in addition, the closure of smoke-box is better, not only can improve the sensitivity of indoor temperature-sensing element temperature-sensitive; and can protect preferably indoor part, security is higher.Therefore the utility model can not only satisfy the requirement of the fire detector that proposes among the GB14003 – 2005, and can improve the sensitivity of sense cigarette, temperature-sensitive, and sensitivity is higher, and corrosion resistance and moisture-proof are better.
5, reflective type optical fiber of the utility model smoke-temperature sensing fire detector comprises separate front end detection section and background process section, front end detection section comprises smoke-box, the emission card holder, the reflection card holder, reflectance coating, temperature sensing device, the emission optical cable, receive optical cable and plastic conduit, background process section comprises light source, light modulator and input processor, not only amount of parts is less, small volume, and layout is clear, be convenient to install, in addition, when later maintenance, only need use air pressure gun or hair dryer to blow the interior dust of smoke-box off and get final product, greatly reduce after service cost.Therefore the utility model is not only simple in structure, and the cost of installation and maintenance is lower.
Description of drawings
Fig. 1 is the structural representation of embodiment 1 in the utility model.
Fig. 2 is the structural representation of embodiment 2 in the utility model.
Fig. 3 is application synoptic diagram of the present utility model.
Among the figure: light source 1, emission optical cable 2, reception optical cable 3, input processor 4, light modulator 5, emission card holder 6, reflection card holder 7, reflectance coating 71, plastic conduit 8, top end opening 81, tail end opening 82, smoke-box 9, optical fiber 10, front end detection section 11, background process section 12, temperature sensing device 13, temperature-sensing element 131, light barrier 132.
Embodiment
Below in conjunction with description of drawings and embodiment the utility model is described in further detail.
Referring to figure 1 – Fig. 3, reflective some type optical fiber smoke-temperature sensing fire detector, comprise light source 1, emission optical cable 2, receive optical cable 3 and input processor 4, described light source 1 is connected with emission optical cable 2 after light modulator 5 modulation, described input processor 4 is connected with reception optical cable 3, described emission optical cable 2, reception optical cable 3 are same optical cables, and its inside all is wrapped with optical fiber 10;
Described reflective some type optical fiber smoke-temperature sensing fire detector also comprises emission card holder 6, reflection card holder 7, reflectance coating 71 and temperature sensing device 13, described light source 1 is green light LED or green (light) laser, described emission optical cable 2, reception optical cable 3 are the communication stage plastic optical fiber cable, and described optical fiber 10 is the communication stage plastic optical fiber;
Described emission optical cable 2, receiving optical cable 3 is arranged side by side in the inside of plastic conduit 8, emission optical cable 2, the end face that receives optical cable 3 one ends is all mutually concordant with the top end opening 81 of plastic conduit 8, the other end of emission optical cable 2 is connected with light source 1 behind the tail end opening 82 of plastic conduit 8, the other end that receives optical cable 3 is connected with input processor 4 behind the tail end opening 82 of plastic conduit 8, be positioned at top end opening 81 on the outside of described plastic conduit 8, position between the tail end opening 82 is set with emission card holder 6, top end opening 81 is positioned at emission card holder 6, between the reflection card holder 7, be provided with the reflectance coating 71 corresponding with top end opening 81 on the side of reflection card holder 7; The outside of described emission card holder 6, reflection card holder 7, plastic conduit 8, temperature sensing device 13 all is covered with same smoke-box 9, and this smoke-box 9 is closed reticulate textures.
Described temperature sensing device 13 comprises interconnective temperature-sensing element 131 and light barrier 132; The top of described reflectance coating 71 is provided with light barrier 132, the temperature-sensing element 131 that arranges on one end of light barrier 132 and reflection card holder 7 sides is connected, the other end extends between reflectance coating 71, the top end opening 81, temperature-sensing element 131 near reflex films 71 arrange, and temperature-sensing element 131 is temperature-sensitive deformation elements.
Described temperature sensing device 13 comprises interconnective temperature-sensing element 131 and light barrier 132; The top of described top end opening 81 is provided with light barrier 132, the temperature-sensing element 131 that arranges on one end of light barrier 132 and plastic conduit 8 sides is connected, the other end extends between reflectance coating 71, the top end opening 81, temperature-sensing element 131 nearly top end openings 81 arrange, and temperature-sensing element 131 is temperature-sensitive deformation elements.
The power of the green light LED that described light source 1 adopts is 20 milliwatts, and operating voltage is less than 3V, and working current is less than 10 milliamperes.
Described emission optical cable 2, the diameter that receives optical cable 3 inner fibers 10 are 1 millimeter, and the distance between described reflectance coating 71, the top end opening 81 is 2.5 millimeters of 2 –, on the described light barrier 132 between reflectance coating 71, top end opening 81 length of part less than 2 millimeters.
The manufactured materials of described light barrier 132 is metal, and its thickness is less than or equal to 0.1 millimeter.
The reflectivity of described reflectance coating 71 〉=95%, thickness are less than 0.2 millimeter, and area is less than 30 square millimeters; The manufactured materials of described plastic conduit 8 is PP plastics or ABS plastic.
The aperture of described smoke-box 9 is less than 1 millimeter, and thickness is less than 0.3 millimeter.
Described smoke-box 9, emission card holder 6, reflection card holder 7, reflectance coating 71, emission optical cable 2, reception optical cable 3, plastic conduit 8, temperature sensing device 13 are integrated into front end detection section 11, described light source 1, light modulator 5, input processor 4 are integrated into background process section 12, and front end detection section 11 is separate with background process section 12.
The quantity of described background process section 12 is one, and the quantity of described front end detection section 11 is at least one.
Principle of the present utility model is described as follows:
One, green light LED or green (light) laser and communication stage plastic optical fiber cable:
1, green light LED or green (light) laser:
The advantage of light signal: green light LED is green light LED, what it transmitted in the communication stage plastic optical fiber cable is light signal, even if having high voltage or very strong terrestrial magnetic field also can not affect the light signal generating in the optical cable around the communication stage plastic optical fiber cable, comparatively speaking, electric signal but is easy to be subject to high voltage or terrestrial magnetic field and disturbs, and causes distorted signals and produces wrong report; In addition, electric signal is unsuitable in the place inflammable and explosive, that electromagnetic radiation intensity is large installing, and has certain potential safety hazard, and the electronic devices and components that produce electric signal are also easily aging, and easily produce wrong report even malfunctioning after aging, the green light LED that the utility model adopts can both be avoided these defectives.
Stability: the green light LED utilization is injected with the charge carrier spontaneous radiation recombination luminescence in source region, there is not threshold property, spectral concentration is than the high several orders of magnitude of LASER Light Source, stability is stronger, and LASER Light Source is the stimulated radiation recombination luminescence, have optical resonator, be easy to be subject to voltage fluctuation and temperature fluctuation impact, it is very serious to cause LASER Light Source light decay and temperature to be floated.Therefore the stability of green light LED is far above LASER Light Source.
Price advantage: general 20 milliwatts of power of the green light LED that the utility model adopts, operating voltage is about 3V, working current is less than 10 milliamperes, 1 green light LED can multiplexing a plurality of reflective some type optical fiber smoke-temperature sensing fire detectors, and its market price is 0.09 yuan/, and the green laser light source of 20 milliwatts, high voltage supply, about 150 milliamperes of working current, its market price are 20 milliwatt green light LED market price more than 1500 times, and volume is very large.
The fire protection warning product requirement: the supply voltage of national regulation fire protection warning product is 24V, high pressure can not be provided, and the standby power supply of mandatory provisions product must satisfy after the dispatch from foreign news agency outage powers more than 8 hours continually and steadily, LASER Light Source not only needs high voltage supply, and considering under practicality and the condition cheaply, if the light source of detector 1 adopts LASER Light Source, then be difficult to its standby power supply of assurance and after the dispatch from foreign news agency outage, can power continually and steadily 8 hours.
Serviceable life: but more than the green light LED life-span continuous working 100,000 hours (about 11.5), but at most continuous workings 7500 hours (about 1 month) of LASER Light Source.
The green (light) laser advantage: power density is large, the output optical alignment is good, light energy output better is coupled into plastic optical fiber (cable), transmission range is far away than the green light LED of Same Efficieney in plastic optical fiber (cable), if the stability of low power green (light) laser is also relatively good, the transmission range of powerful green (light) laser will be much larger than green light LED.
Therefore, the LASER Light Source of comparing, the utility model takes green light LED as light source 1, not only can satisfy the fire protection warning product requirement, stability is stronger, and serviceable life is longer, and especially price is very cheap, has greatly improved cost performance of the present utility model.And if require the plastic optical fiber cable transmission range very long, green light LED does not satisfy when requiring, and then adopts powerful green (light) laser.
2, communication stage plastic optical fiber cable:
The inside of communication stage plastic optical fiber cable is wrapped with communication stage optical fiber, in actual applications, need to peel off a bit of protective sleeve in communication stage plastic optical fiber cable surface is convenient to continue except positions such as joints, and all the other positions all are shown as the communication stage plastic optical fiber cable.With the electric wire in the communication stage plastic optical fiber cable replacement existing product, low energy consumption, the low pollution, cost is lower, meets the industry policy of country's " light entering and copper back and energy-saving and emission-reduction ".
Fibre diameter compares: the utility model utilizes light scattering to smog/temperature sensing, it is large as far as possible that this just requires to be scattered light intensity, the size of light intensity is directly related with the diameter of optical fiber, fibre diameter can allow greatly light as much as possible enter fibre core to transmit, communication stage plastic optical fiber diameter is 1mm, communication stage silica fibre diameter then is 0.125mm, differ 8 times, under the light source of same power, the communication stage silica fibre is because diameter is too little, its internal transmission light intensity too a little less than, be not suitable for detection smog/temperature, if must survey smog/temperature, carry out optical signal transmission with regard to adopting the silica fibre of bunchy, will increase difficulty and the cost of end face processing this moment, the diameter of silica fibre only has 0.125mm, and is not only thin but also soft, and its end face processing not only accuracy requirement is high, length consuming time, and the quality of end face processing needs specialized equipment just can detect, processing cost is very high, and has adopted fibre bundle, and this meaning will be processed a large amount of silica fibres, consuming time longer, cost is higher.Comparatively speaking, the communication stage plastic optical fiber cable that the utility model adopts has 1mm owing to diameter, and certain degree of hardness is arranged, and its end face processing with the naked eye just can be judged quality, and only need process one, and one just can be satisfied the requirement of surveying smog/temperature after all.
Attenuation coefficient compares: the utility model comprises front end detection section 11 and background process section 12, front end detection section 11 need to be arranged on the occasion of easy breaking out of fire to detect, and backstage handling part 12 needs the long distance in interval to process to carry out data, connect by optical cable between the two, this just requires optical cable to have lower attenuation coefficient to support the longer-distance transmission of light signal.Attenuation coefficient≤the 0.2dB/m of the communication stage plastic optical fiber cable that the utility model adopts can satisfy in the fire alarm requirement to transmission range.
Price comparison: on the market, domestic communication stage plastic optical fiber cable price is 0.6 yuan/m,, the quartzy optical cable price of domestic communication stage is 3 yuan/m, price differs 5 times.
Therefore the communication stage plastic optical fiber cable diameter that the utility model adopts is large, attenuation coefficient is little, not only can improve the intensity of light signal, and can carry out remote optical signal transmission, and price is also very cheap, and cost performance is very high.
3, the collocation of green light LED or green (light) laser, communication stage plastic optical fiber cable:
The utility model with green light LED or green (light) laser as light source 1, communication stage plastic optical fiber cable as the reason of transmission cable except their advantages separately, also be the collocation advantage of green light LED or green (light) laser, communication stage plastic optical fiber cable: for LED or the laser instrument of different colours, under the Same Efficieney, the decay in the communication stage plastic optical fiber cable of green light LED or green (light) laser is minimum, and transmission range farthest.
Simultaneously, the green light LED diameter is 5mm, and the diameter of communication stage plastic optical fiber cable is 1mm, only need allow the end face of optical fiber 10 directly aim at green light LED just in the production, do not need expensive optical device and light path to regulate, simple to operate, be convenient to volume production, and the silica fibre diameter only has 0.125mm, it must could send into the transmission of silica fibre the inside to the light that light source 1 sends as far as possible by condenser lens, complicated operation, cost is high, is not suitable for volume production.
If LED or laser instrument and the collocation of communication stage plastic optical fiber cable with other colors, its shortcoming is: under the identical power conditions, only have green light LED or green (light) laser in the communication stage plastic optical fiber cable transmission range farthest, the LED of other colors or laser instrument transmission range are too short, are not suitable for reality.
If with green light LED or green (light) laser and the collocation of other optical cable, its shortcoming is: the minimum optical wavelength of decay is 850nm, 1310nm, 1550nm in the silica fibre, and the wavelength of green glow is 532nm, thereby green glow is decayed very large in silica fibre, transmission range is limited, is not suitable for reality.
Two, smoke-box 9:
Clearly propose fire detector among the GB14003 – 2005 and should be able to prevent that diameter from being that the spherical object of 0.95 – 1mm enters in it, so the GB requirement has not only been satisfied less than 1mm in the aperture of smoke-box 9 in the utility model, and can insect protected.Simultaneously; the utility model requires the thickness of smoke-box 9 in 0.3mm; can not only make things convenient for smog to enter; and can strengthen the effect of gathering of smoke-box 9 interior smog; improve the relative concentration of smoke-box 9 interior smog; thereby improve sensitivity of the present utility model; in addition; the closure of smoke-box 9 is better; can not only be preferably the temperature of surrounding environment be passed to temperature-sensing element 131, thereby improve the sensitivity of indoor temperature-sensing element 131 temperature-sensitives, and can protect preferably indoor part; security is higher, and corrosion resistance and moisture-proof are better.
Three, temperature sensing device 13:
Four, light modulator 5:
Embodiment 1: the quantity of light source 1, light modulator 5 is one, and a light source 1 acts on four front end detection sections 11 simultaneously:
Referring to Fig. 1 and Fig. 3, front end detection section 11 comprises smoke-box 9, emission card holder 6, reflection card holder 7, reflectance coating 71, temperature sensing device 13, emission optical cable 2, receives optical cable 3 and plastic conduit 8, and background process section 12 comprises light source 1, light modulator 5 and input processor 4; Described temperature sensing device 13 comprises interconnective temperature-sensing element 131 and light barrier 132;
Described light source 1 is green light LED, the power of this green light LED is 20 milliwatts, operating voltage is less than 3V, working current is less than 10 milliamperes of (or light source 1 employing green (light) lasers, this green (light) laser can adopt miniwatt to satisfy its stability and price request, when being had special requirement, transmission range adopts powerful green (light) laser), described emission optical cable 2, receive optical cable 3 and be the communication stage plastic optical fiber cable, described optical fiber 10 is the communication stage plastic optical fiber, described emission optical cable 2, the diameter that receives optical cable 3 inner fibers 10 is 1 millimeter, described reflectance coating 71, distance between the top end opening 81 is 2.5 millimeters of 2 –, be positioned at reflectance coating 71 on the described light barrier 132, the length of part is less than 2 millimeters between the top end opening 81, the manufactured materials of described light barrier 132 is metal, and its thickness is less than or equal to 0.1 millimeter;
Described emission optical cable 2, receiving optical cable 3 is arranged side by side in the inside of plastic conduit 8, emission optical cable 2, the end face that receives optical cable 3 one ends is all mutually concordant with the top end opening 81 of plastic conduit 8, the other end of emission optical cable 2 is through being connected behind the tail end opening 82 with by the light source 1 after light modulator 5 modulation, the other end that receives optical cable 3 is connected with input processor 4 behind the tail end opening 82 of plastic conduit 8, be positioned at top end opening 81 on the outside of described plastic conduit 8, position between the tail end opening 82 is set with emission card holder 6, top end opening 81 is positioned at emission card holder 6, between the reflection card holder 7, be provided with the reflectivity of the reflectance coating 71(reflectance coating 71 corresponding with top end opening 81 〉=95% on the side of reflection card holder 7, thickness is less than 0.2 millimeter, area is less than 30 square millimeters), the top of described reflectance coating 71 is provided with light barrier 132, the temperature-sensing element 131 that arranges on one end of light barrier 132 and reflection card holder 7 sides is connected, the other end extends to reflectance coating 71, between the top end opening 81, temperature-sensing element 131 near reflex films 71 arrange, and temperature-sensing element 131 is temperature-sensitive deformation elements; The outside of described emission card holder 6, reflection card holder 7, plastic conduit 8, temperature sensing device 13 all is covered with same smoke-box 9, and this smoke-box 9 is apertures less than 1 millimeter, the thickness closed reticulate texture less than 0.3 millimeter;
During use, light source 1, be the light that sends of green light LED or green (light) laser through light modulator 5 modulation after (its effect is to prevent that external environment light from disturbing), be coupled into an end of emission optical cable 2, the other end from emission optical cable 2 is incident upon on the reflectance coating 71 again, the received optical cable 3 of reflected light receives, reception optical cable 3 is delivered to input processor 4 to the light signals that receive and is processed, when smog being arranged through optical fiber 10 end faces, smog district between the reflectance coating 71 (namely launches optical cable 2, receive on the optical cable 3 and the end face of top end opening 81 equal homogeneous ends and the zone between the reflectance coating 71) time, smog can cause receiving the light intensity decreasing that optical cable 3 receives, this situation can reflect at input processor 4, and sends fire alarm signal by input processor 4; Or when ambient temperature rises, temperature-sensing element 131 can rise and gradually extremely bending of deformation by Yin Wendu, at this moment, temperature-sensing element 131 drives the light barrier 132 that the one ends paste and moves down, and is incident upon light on the reflectance coating 71 with minimizing, be equal to and reduced reflectivity, thereby reduce to receive the light intensity that optical cable 3 receives, and then the light intensity that causes delivering to input processor 4 dies down, just can detect temperature by the variation of light intensity this moment, when temperature arrives the setting threshold values, just report to the police.
Embodiment 2:
Substance is with embodiment 1, and difference is:
Referring to Fig. 2 and Fig. 3, described temperature sensing device 13 is arranged on the plastic conduit 8, be specially: the top of described top end opening 81 is provided with light barrier 132, the temperature-sensing element 131 that arranges on one end of light barrier 132 and plastic conduit 8 sides is connected, the other end extends between reflectance coating 71, the top end opening 81, temperature-sensing element 131 nearly top end openings 81 arrange, and temperature-sensing element 131 is temperature-sensitive deformation elements.
Therefore the utility model not only can be stopped electronic devices and components and survey smog/temperature, is difficult for aging, the place that the spy is applicable to is inflammable and explosive, electromagnetic radiation intensity is large, and can satisfy the requirement of fire protection warning product, transmission range is long, highly sensitive, simple in structure, the installation and maintenance cost is lower.
Be used in the automatic fire alarm that stores the oil place: front end detection section 11 is installed near the oil tank, emission optical cable 2, reception optical cable 3 can not produce oil tank dangerous, background process section 12 is installed in distant duty room, front end detection section 11 links to each other with background process section 12 by emission optical cable 2, reception optical cable 3, remote Real Time Monitoring fire condition that can be very safe, the smog that produces when monitoring simultaneously the variation of stock tank temperature anomaly and oil firing.
Be used in the automatic fire alarm of various machine rooms: because a lot of optical cables in machine room the inside and cable, cable causes environment temperature sharply to raise when short circuit and is suitable for heat fire detector, and optical cable and common material can produce thick smoke in when burning and be suitable for smoke fire detector, thereby reflective some type optical fiber smoke-temperature sensing fire detector is very suitable for the fire detecting and alarm in this class place, can with cable, optical cable construct simultaneously the wiring and do not interfere with each other, can be good at the Real Time Monitoring fire condition.
Claims (10)
1. reflective some type optical fiber smoke-temperature sensing fire detector, comprise light source (1), emission optical cable (2), receive optical cable (3) and input processor (4), described light source (1) is connected with emission optical cable (2) after light modulator (5) modulation, described input processor (4) is connected with reception optical cable (3), described emission optical cable (2), reception optical cable (3) are the same optical cables, and its inside all is wrapped with optical fiber (10), it is characterized in that:
Described reflective some type optical fiber smoke-temperature sensing fire detector also comprises emission card holder (6), reflection card holder (7), reflectance coating (71) and temperature sensing device (13), described light source (1) is green light LED or green (light) laser, described emission optical cable (2), reception optical cable (3) are the communication stage plastic optical fiber cable, and described optical fiber (10) is the communication stage plastic optical fiber;
Described emission optical cable (2), receiving optical cable (3) is arranged side by side in the inside of plastic conduit (8), emission optical cable (2), the end face that receives optical cable (3) one ends is all mutually concordant with the top end opening (81) of plastic conduit (8), the other end of emission optical cable (2) is connected with light source (1) behind the tail end opening (82) of plastic conduit (8), the other end that receives optical cable (3) is connected with input processor (4) behind the tail end opening (82) of plastic conduit (8), be positioned at top end opening (81) on the outside of described plastic conduit (8), position between the tail end opening (82) is set with emission card holder (6), top end opening (81) is positioned at emission card holder (6), between the reflection card holder (7), be provided with the reflectance coating (71) corresponding with top end opening (81) on the side of reflection card holder (7); The outside of described emission card holder (6), reflection card holder (7), plastic conduit (8), temperature sensing device (13) all is covered with same smoke-box (9), and this smoke-box (9) is closed reticulate texture.
2. reflective some type optical fiber smoke-temperature sensing fire detector according to claim 1 is characterized in that: described temperature sensing device (13) comprises interconnective temperature-sensing element (131) and light barrier (132); The top of described reflectance coating (71) is provided with light barrier (132), the temperature-sensing element (131) that arranges on one end of light barrier (132) and reflection card holder (7) side is connected, the other end extends between reflectance coating (71), the top end opening (81), temperature-sensing element (131) near reflex film (71) arranges, and temperature-sensing element (131) is temperature-sensitive deformation element.
3. reflective some type optical fiber smoke-temperature sensing fire detector according to claim 1 is characterized in that: described temperature sensing device (13) comprises interconnective temperature-sensing element (131) and light barrier (132); The top of described top end opening (81) is provided with light barrier (132), the temperature-sensing element (131) that arranges on one end of light barrier (132) and plastic conduit (8) side is connected, the other end extends between reflectance coating (71), the top end opening (81), the nearly top end opening (81) of temperature-sensing element (131) arranges, and temperature-sensing element (131) is temperature-sensitive deformation element.
4. according to claim 1,2 or 3 described reflective some type optical fiber smoke-temperature sensing fire detectors, it is characterized in that: the power of the green light LED that described light source (1) adopts is 20 milliwatts, and operating voltage is less than 3V, and working current is less than 10 milliamperes.
5. according to claim 2 or 3 described reflective some type optical fiber smoke-temperature sensing fire detectors, it is characterized in that: the diameter of described emission optical cable (2), reception optical cable (3) inner fiber (10) is 1 millimeter, distance between described reflectance coating (71), the top end opening (81) is 2.5 millimeters of 2 –, is positioned at the length of part between reflectance coating (71), the top end opening (81) on the described light barrier (132) less than 2 millimeters.
6. reflective some type optical fiber smoke-temperature sensing fire detector according to claim 5, it is characterized in that: the manufactured materials of described light barrier (132) is metal, and its thickness is less than or equal to 0.1 millimeter.
7. according to claim 1,2 or 3 described reflective some type optical fiber smoke-temperature sensing fire detectors, it is characterized in that: the reflectivity of described reflectance coating (71) 〉=95%, thickness are less than 0.2 millimeter, and area is less than 30 square millimeters; The manufactured materials of described plastic conduit (8) is PP plastics or ABS plastic.
8. according to claim 1,2 or 3 described reflective some type optical fiber smoke-temperature sensing fire detectors, it is characterized in that: the aperture of described smoke-box (9) is less than 1 millimeter, and thickness is less than 0.3 millimeter.
9. according to claim 1,2 or 3 described reflective some type optical fiber smoke-temperature sensing fire detectors, it is characterized in that: described smoke-box (9), emission card holder (6), reflection card holder (7), reflectance coating (71), emission optical cable (2), reception optical cable (3), plastic conduit (8), temperature sensing device (13) are integrated into front end detection section (11), described light source (1), light modulator (5), input processor (4) are integrated into background process section (12), and front end detection section (11) is separate with background process section (12).
10. reflective some type optical fiber smoke-temperature sensing fire detector according to claim 9, it is characterized in that: the quantity of described background process section (12) is one, the quantity of described front end detection section (11) is at least one.
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| CN 201220382938 CN202795641U (en) | 2012-08-03 | 2012-08-03 | Reflecting type point-pattern optical fiber smoke and temperature sensing fire detector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104766432A (en) * | 2015-03-19 | 2015-07-08 | 保定隶都电子科技有限公司 | Smoke and temperature sensing fire disaster detector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104766432A (en) * | 2015-03-19 | 2015-07-08 | 保定隶都电子科技有限公司 | Smoke and temperature sensing fire disaster detector |
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