CN107851355A - There is optical measurement chamber in alarm housing and be the scattered light smoke warner that the housing part locates minute surface on the inside of alarm cover - Google Patents
There is optical measurement chamber in alarm housing and be the scattered light smoke warner that the housing part locates minute surface on the inside of alarm cover Download PDFInfo
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- CN107851355A CN107851355A CN201680046315.7A CN201680046315A CN107851355A CN 107851355 A CN107851355 A CN 107851355A CN 201680046315 A CN201680046315 A CN 201680046315A CN 107851355 A CN107851355 A CN 107851355A
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
- G08B17/103—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device
- G08B17/107—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device for detecting light-scattering due to smoke
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- Business, Economics & Management (AREA)
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- General Physics & Mathematics (AREA)
- Fire-Detection Mechanisms (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The present invention relates to a kind of scattered light smoke warner（1）, it has the optical measurement chamber being connected with surrounding air.The latter is contained in alarm housing（2）Inside（IR）In and by matrix（3）With the alarm cover of the alarm housing（4）Gauge.Preferably flat circuit carrier is accommodated in described matrix（7）.On this circuit carrier the light emitting diode in optical assembly is scattered adjacently is disposed with the measurement chamber（5）And optical sensor（6）.The light emitting diode and the optical sensor have at least almost optical axial orthogonal with the circuit carrier respectively（A）, and with measuring the inner side of chamber described in the alarm cover, gauge（IS）It is opposed.A part for the inner side has at least one minute surface（S）, the minute surface is opposed with the light emitting diode.The minute surface has such mirror geometry so that the light cone of the light emitting diode（R、B）In the first scattering body of light product positioned at the measurement intracavitary（Z1、Z）In receiving area with the optical sensor（E）It is intersecting, and the light cone actually contactlessly traverses the inner space of the alarm housing with the measurement chamber after its reflection and is imported into light absorptive ligh trap.
Description
The present invention relates to a kind of scattered light smoke warner, the scattered light smoke warner has what is be connected with surrounding air
Optical measurement chamber.The measurement chamber is contained in the inside of alarm housing, and by the alarm of matrix and the alarm housing
Device cover gauge.Described matrix and the alarm cover also can be single types.The two is preferably plastic injection piece.In the base
Preferably flat circuit carrier is accommodated in body, is adjacently disposed with scattering light with the measurement chamber on the circuit carrier
Light emitting diode and optical sensor, such as photodiode in component.
Such scattered light smoke warner is well-known.They with according to the present invention scattered light smoke warner
It can equally be configured to and alarm bus or alarm connection.If detecting minimum smokescope, export
Alarm or caution signal are in the alarm bus.The alarm or caution signal can alternatively, or additionally lead to
Cross radio and/or exported at the scattered light smoke warner in a manner of optics and/or acoustics.Observed, construction
The independence fortune based on battery can be alternatively, or additionally configured to for the scattered light smoke warner of point type alarm
OK（Stand-Alone-Betrieb）.
The prior art being previously mentioned from the outset is set out, and task of the invention is to provide a kind of particularly compact scattering light cigarette
Fog siren.
The task solves using the object of main claim.The advantageous embodiment of the present invention is in dependent claims
In provide.
According to the present invention, the light emitting diode and the optical sensor have respectively at least almost with the circuit carrier
Orthogonal optical axial.In other words, two optical axials are at least almost parallel to each other.The light emitting diode and the light sensing
Device is opposed with the inner side that chamber is measured described in the alarm cover gauge.A part on the inside of this has at least one minute surface, the mirror
Face is opposed with the light emitting diode.The minute surface has such mirror geometry so that the light cone of the light emitting diode
Intersect in the scattering body of light product positioned at the measurement intracavitary with the receiving area of the optical sensor, and the light cone is anti-at its
After penetrating（Actually contactlessly）Traverse the inner space of the alarm housing with the measurement chamber and be imported into light absorptive
In ligh trap.
The minute surface can have plane or concave surface.It can be the paper tinsel of silver color either by metal, such as aluminium or steel
Manufactured plate.The paper tinsel can be pasted onto on the inner side of the alarm cover.The plate can for example be pasted onto the alarm
It is arranged on simultaneously at the inner side of the alarm cover at the inner side of cover or when being molded the alarm cover.The minute surface also can be
Metallization face, the metallization face are for example applied by means of CVD method in a vacuum.The minute surface also can be tool
There are the plastic lens in glossiness or polishing face, such as be made up of black plastic.
The circuit carrier is preferably flat circuit board.Especially, this circuit board is at least two circuit carrier sides
In one it is upper be used for it is surface-mounted, that is contact surface for so-called SMD assemblings.
The core of the present invention is the inner side of the alarm cover being used as mirror or as reflector, to make by described
Light emitting diode is orthogonal to the central area that the light beam that the circuit carrier is sent is turned through in the inside of the alarm housing
Domain.
Thereby, it is possible to be advantageously carried out it is compact while in structure particularly simple scattered light smoke warner.
In addition, turn to by the focusing of the light beam and targetedly, it is advantageously possible that, the light beam is effectively fixed
It is imported into ground in the ligh trap set for this, the ligh trap has almost complete light absorbs." actually contactless " herein means
, reflected light beam, in addition to the edge beam that the light beam is separated, it is imported into completely in the ligh trap, and before
The other parts of the housing are not contacted.
According to a kind of embodiment, at least one aperture and/or at least one ligh trap are disposed with the circuit carrier
And/or light absorptive structure.Preferably, single type cover plate is installed on the circuit carrier, the cover plate, which has, to be at least used for
The light emitting diode and the groove for the optical sensor.The cover plate has at least one aperture and/or ligh trap
And/or light absorptive structure or form these.Preferably, the cover plate, in addition to the groove being previously mentioned before, basic overlying
The whole upside circuit carrier, opposed with the inner side of the alarm is covered, and so as to form the bottom of the optical measurement chamber.
The plastic injection piece of the cover plate especially black.
At least one aperture is constructed as far as possible, so that only a small amount of light is fallen on such seamed edge simultaneously sharp edge
And reflected.The ligh trap is preferably configured as tank shape or infundibulate.They have the light beam on the light emitting diode
The face and/or fold that main incident direction is so orientated in size and geometry so that fall into the light beam of there after some secondary reflections
" move towards terminal（Disappear）”.The major part of the remaining upside of the cover plate is preferably configured as fold shape.The aperture and/or ligh trap
And/or the surface of fold or fold face preferable configuration obtain glossy, and worked as black mirror.Under this has
State advantage：Light not diffusing scattering on falling but reflect with being directed.
Preferably, the inner side of the alarm cover, in addition to the minute surface, also have as light absorptive structure fold,
The especially fold of black glossy.The alarm, which covers on, can also have light absorptive coating, such as black coating at its inner side.
As such, it is advantageous to reduce so-called basis pulses.Therefore, less quilt at the wall and part of the optical measurement chamber
The light of reflection reaches the optical sensor.
The optical measurement chamber therefore by the adjoining on the circuit carrier cover plate and the alarm cover it is opposed
Inner side is formed.Thereby, it is possible to advantageously abandon the lid of tank shape, the lid of the tank shape is generally inserted into the optical measurement chamber
On bottom or cover plate.Such arrangement is also referred to as labyrinth.Such, representative cylindrical configuration labyrinth generally has thin
Piece, the thin slice is as the light shielding element at radially outer periphery.So configuration the latter so that they realize to be detected
Smoke particle is the direct ambient light of internal shield in the labyrinth by the inside in the labyrinth.
Preferably, such light shielding element is the integration section for the cover plate of the circuit carrier.They can make
It is injection molding together there for working of plastics.The light shielding element can be alternatively integrated in the alarm cover or in institute
State in matrix.
Preferably, alarm housing with the alarm cover with substantially rotational symmetry or mirror image foreign steamer
It is wide.Thus achieve the smoke detection of largely independent of direction.
According to a kind of advantageous embodiment, the alarm cover has the outline of protrusion and is at least partially recessed into interior
Profile.Corresponding minute surface is at the inner side of the alarm cover with the Internal periphery being at least partially recessed into for following the alarm cover
Mirror geometry.The minute surface can be for example including spheroid, spheroid, parabola or the recessed portion on bi-curved surface
Point.The minute surface, corresponding recessed Internal periphery in size and geometry are produced by the outline of the protrusion, here, on condition that,
The wall thickness of the alarm cover is kept essentially constant.
It is advantageously possible by the Internal periphery of the female, it is falling into, sent by the opposed light emitting diode
Light beam focus on.
According to a kind of advantageous embodiment of the scattered light smoke warner, the optical sensor is arranged in the alarm
The center of housing, so that the scattering body of light product formed in the inner space of the alarm housing is surrounded through the smog
Main shaft center extension, in structure of alarm.As such, it is advantageous to realize the smog of independent of direction to the full extent
Detection.
Preferably, at least one other light emitting diode is disposed with the circuit carrier, it is described at least one another
Outer light emitting diode has the optical axial orthogonal with the circuit carrier.In other words, the optic axis of three optoelectronic components
Line is at least almost parallel to each other.At least one at least one other light emitting diode is arranged to and the described first hair
Optical diode is adjacent.Alternatively, at least one other light emitting diode is formed double-colored with first light emitting diode
Or multi-color LED, as incorporated light electronic component.At least one other light emitting diode and first hair
The minute surface of optical diode is opposed.The light sent by corresponding light emitting diode has wavelength different from each other.
By the assessment of the particular color of the photosensor signal it is possible that the particulate of the smoke particles to being detected is big
The small progress technical analysis of fire.
Preferably, first light emitting diode is a length of 940 ± 70 nm of light wave（Monochromatic）The pole of emitting red light two
Pipe or（Monochromatic）Infrarede emitting diode.Second light emitting diode is preferably a length of 470 ± 70 nm's of light wave
（Monochromatic）Blue LED or in UV-A scopes（Monochromatic）UV light emitting diodes.First and second hair
Optical diode can be combined into dichromatic LED.Such light emitting diode is also referred to as dual LED or double LED.
Substantially, two light emitting diodes have approximately uniform optical axial, so that advantageously in the inner side of the alarm cover
Place does not need other minute surface.
Typically, the smoke alarm has electronic control unit, especially microcontroller.Described control unit and phase
The light emitting diode answered connects with the optical sensor, especially on signalling technique or data technique.If it is associated with institute
The sensor signal for stating corresponding light emitting diode exceedes scattering optical extremes or the scattering optical extremes of combination, the then control
Unit processed exports alarm of fire.In addition, the microcontroller is provided for, at least indirectly and with multiple light-emitting diodes
The light emitting diode is alternately manipulated during pipe, and assesses corresponding photosensor signal with possession in time.
According to another embodiment, thermal radiation sensor is accommodated in the alarm housing, the heat radiation passes
Sensor is in middle infrared（MIR）In thermal radiation responsive and non-contact operation." middle infrared " is referred to for heat
3 μm to 20 μm of wave-length coverage for radiation.The thermal radiation sensor especially thermoelectric pile or bolometer.But
It is, in dialect, more usually english terminology " Thermopile " for thermoelectric pile.With when heat radiation changes
Only the pyrotechnics sensor of one signal of output is compared, and such thermal radiation sensor is when heat radiation is constant corresponding to its intensity
Export a sensor signal.
According further to the present invention, the thermal radiation sensor is optically aligned with the inner side of the alarm cover
Middle section, to detect the case temperature of there, the case temperature is substantially followed in the scattered light smoke warner
Close to environment in environment temperature.The middle section typically comprises the master of the geometry of the scattered light smoke warner
Axis or rotationally symmetric axis.The middle section also is located in the optical detection scope of the thermal radiation sensor.In addition, including
The alarm cover in whole alarm housing be embodied as it is lighttight so that either in visible-range,
Noticeable light in ultraviolet ray range or near infrared region and middle infrared can not all pass through the alarm housing.
The heat radiation detected has direct relation with the temperature at the inner side of the alarm cover, described in the alarm
Temperature at the inner side of cover follows actual environment temperature with small, rational delay.Here, work as by the regulation installation cover period of the day from 11 p.m. to 1 a.m,
The most fast heating of middle section of the usual alarm cover.Therefore, it can so arrange the wall thickness of the alarm cover so that at this
Environment temperature existing for the outside of alarm cover due to the heat conduction of the alarm cover material property with less than 30s, especially
Time constant less than 10s follows.Especially, the housing component has the wall thickness in 1 to 2 mm scope, so that can
Can, the time constant for the heated conveying in the middle section of the alarm cover from the outside to the inner side is less than
10 seconds.
In addition, described control unit is connected and is provided for the thermal radiation sensor, in a manner of calculating from by
Export corresponds to the temperature value of the environment temperature in the hot transducing signal of the thermal radiation sensor output, and should in output
Consider this temperature value simultaneously during alarm of fire.Here, when naked light occurs, too high temperature value can be used in the cigarette detected
The Credence test of mist.When occurring, smokeless naked light, such as alcohol are on fire, but the environment temperature is too high, is greater than 65
Degree Celsius when, also alarm of fire can be exported by described control unit.
Described control unit be provided for according to high temperature measurement principle in the case where considering stored radiation coefficient really
The fixed temperature value.Surface nature and/or material and heat radiation with launched of the radiation coefficient with the alarm cover
Wavelength it is relevant.Preferably, the value of the radiation coefficient in the middle infrared is at least 0.8, preferably at least 0.9.This energy
It is enough for example by being realized in black plastic of the inner side of the alarm cover in middle section or black paint covering.
The radiation coefficient can be determined for example in the framework of specimen inspection in e measurement technology.
The non-contact type temperature detection carried out by using the thermal radiation sensor, can advantageously dispense with temperature survey
Resistance, expensive hand assembled（Including in being routed in necessary to this）.
Housing component is included to this alternative embodiment, the alarm cover according to one kind, the housing component comprises at least
The middle section of the alarm cover.This housing component is preferably integrated in the alarm cover.In addition, this housing component
It is transparent for the heat radiation in middle infrared.In contrast, remaining housing component is preferably implemented as lighttight,
So that either in visible-range, in ultraviolet ray range or near infrared region and middle infrared in being worth noting
Light can not all pass through remaining alarm housing.The material of the housing component in center can be, for example, plastics, be, for example, based on poly-
The thermoplastic of methyl methacrylate, or ceramics, be, for example, based on magnesia and aluminum oxide, transparent, fine
The spinel ceramics of crystallization.Especially, this material seems light tight, especially opaque or white in optics visible range
Color is opaque.Therefore the scattered-light alarm has following housings or an alarm cover, the housing for the observer as
Conventional fire-alarm is the same.
In addition, according to the present invention control unit be connected and be provided for the thermal radiation sensor, according to for
The appearance of the naked light either significant fluctuation of raging flames or flash frequency monitors what is exported by the thermal radiation sensor
Hot transducing signal, and consider that the heat sensing exported by the thermal radiation sensor is believed simultaneously when exporting the alarm of fire
Number.Monitoring in the frequency technique can be analyzed for example by means of digital filter or by means of digital Fourier（FFT、
DFT）To realize.
Thus, when detecting naked light, before caused smoke particle herein reaches the optical measurement chamber, with regard to energy
It is enough to export alarm of fire at once.Therefore quickly alarmed.
According to a kind of embodiment, described control unit can be additionally provided in being used for, from the constant of the hot transducing signal
--- as illustrated by beginning --- export corresponds to the temperature value of the environment temperature in component in a manner of calculating, and
And equally consider the temperature value corresponding to the environment temperature simultaneously when exporting the alarm of fire.
Thus, the fire characteristic parameter of two characteristics just can be advantageously detected only by means of a thermal radiation sensor.
Single other component for carrying out temperature detection in the environment of the danger detector can omit.
According to another embodiment, optical lens is formed only for transparent housing component for heat radiation, to expand
The optical detection scope of the big thermal radiation sensor.Thus, it is possible to monitor bigger model in the environment of the scattered light smoke warner
Enclose.
The favourable embodiment of the present invention and the present invention are illustrated by the example of following accompanying drawings.It is shown in which：
Fig. 1 according to the present invention, have minute surface scattered light smoke warner first embodiment,
Fig. 2 has the second embodiment of two minute surfaces,
Fig. 3 according to the present invention, have be used for detect environment temperature thermal radiation sensor the 3rd embodiment,
Fig. 4 according to the present invention, have two minute surfaces and two scattering optical assemblies the 4th embodiments,
Fig. 5 is according to the heat radiation biography present invention, in fire alarm meaning, for detecting environment temperature and detecting naked light
5th embodiment of sensor,
Fig. 6 is according to Fig. 5 top view embodiment, along the direction of observation VI drawn there.
Fig. 1 shows the first embodiment of scattered light smoke warner 1 according to the present invention, with minute surface S.It is shown
Scattered light smoke warner 1 there is alarm housing 2, the alarm housing is made up of matrix 3 and alarm cover 4.The report
Alert device 1 is arranged at alarm pedestal not shown further with its connecting side AN, and the alarm pedestal is typically fastened on
On ceiling.Opening OF is configured between matrix 3 and alarm cover 4, so that smoke particle can by these openings
Into the inside IR of the alarm housing 2, for optical smoke detection.In addition, in the scope of the opening OF exist with
The light shielding element of thin slice LAM form, the thin slice make the smoke particle by but the direct ambient light of shielding（Referring to
Fig. 6）.
For the smoke detection, optical measurement chamber is accommodated or is configured with the inside IR of the alarm housing 2,
The optical measurement chamber is by described matrix 3 and the gauge of alarm cover 4.Circuit carrier 7 is accommodated in described matrix 3,
On the circuit carrier light emitting diode 5 and optical sensor 6 in optical assembly is scattered adjacently are disposed with the measurement chamber.
In such an arrangement, direct light can not reach the optical sensor 6 from the light emitting diode 5.The hair
Optical diode 5 and the optical sensor 6 are all arranged so as on the circuit carrier 7 so that their optical axial A with it is described
Circuit carrier 7 is orthogonal or almost orthogonal, and is therefore parallel to each other.In preferable actual conditions, the light emitting diode 5
It is SMD components with the optical sensor 6, the SMD components can be applied with high accuracy and automatically with being set for this
On the circuit carrier 7 for the contact surface put.
According to the present invention, the inner side IS of the light emitting diode 5 and the optical sensor 6 and the alarm cover 4 is directly right
Put, wherein, optical measurement chamber described in the inner side gauge.In other words, the light emitting diode 5 irradiates on direct path is somebody's turn to do
The inner side IS of alarm cover 4.Lack labyrinth lid compared with prior art, if so, then the labyrinth lid is on the one hand positioned at described
Between light emitting diode 5 and the optical sensor 6, on the other hand between the inner side IS of the alarm cover 4.
In addition, the inner side IS of the alarm cover 4 part has minute surface S, the minute surface and the light emitting diode 5 are right
Put.It is arranged the minute surface S so that light cone R, the B sent by the light emitting diode 5 is mapped on the minute surface S completely.Institute
State minute surface S has such mirror geometry herein so that described light cone R, B are positioned at the first of the optical measurement intracavitary
Intersect in scattering body of light product Z with the receiving area E of the optical sensor 6.Here, only scatter the particulate during body of light is accumulated at this
It is detected by the optical sensor 6 to scatter light.Typically, the receiving area E is to receive cone.
In addition, according to the present invention, aperture BL, ligh trap LF are provided with the optical measurement chamber and in the form of fold
Light absorptive structure AB, minimize basis pulses.In the present example, previously mentioned structural detail BL, LF, AB are black
The integrated component of the plastic cover plate 8 in coloured light pool, the plastic cover plate of the black glossy are provided for covering or installed in described
At circuit carrier 7 and it may be said that form the bottom of the optical measurement chamber.The cover plate 8 is integrated plastic note in this example
Plastic.This part can be also made up of multiple working of plastics in a manner of it can not be separated.In addition, have in the cover plate 8
Two exist for the light emitting diode 5 and the groove for the optical sensor 6, the groove in the form of breach.It is excellent
Selection of land, the inner side IS of the alarm cover 4 also have light absorptive structure AB, and the light absorptive structure is for example with fold or fold face
Form exist（It is not shown）.Except that the minute surface S, the minute surface can for example by mounted reflection plate or by
The metal of vapour deposition, such as aluminium are realized.
Shown scattered light smoke warner 1 additionally have substantially rotational symmetry or mirror image outline.
On the other hand, main shaft or the symmetrical axial direction in the structure are marked using SA.In addition, the alarm cover 4 is in its outside
AS has the outline of protrusion.The alarm cover 4 has the about not wall thickness of Varying-thickness in 1 to 2 mm scopes, so as to
So that the alarm cover 4 forms the Internal periphery in structurally corresponding protrusion at its inner side IS.Minute surface S mirror is several
What shape also almost follows this profile.Resulting recessed mirror geometry can be advantageously used for converging poly and poly
The light cone that Jiao is sent.In other words, by suitably selecting the outline of the alarm cover to realize desired favourable mirror
Geometry.
In the example shown, the minute surface S has such mirror geometry so that the light emitting diode 5
Light cone R, B actually contactlessly traverse the inner space of the alarm housing 2 with the optical measurement chamber after its reflection
IR, and be imported into the light absorptive ligh trap LF.Light falling into there, being scattered not at smoke particle is effective there
Ground absorbs.
Shown scattered light smoke warner has electronic control unit 10, to manipulate and assess the photoelectron structure
Part 5,6 and to export warning message.This electronic control unit is preferably microcontroller and is used in the circuit
On carrier 7.Described control unit 10 is provided in program technic at least indirectly pulsedly manipulating the light emitting diode
5, and assess the corresponding sensor signal from the optical sensor 6.If the sensor signal exceedes scattering auroral poles
Limit value, then export warning message.
Shown light emitting diode 5 can be the light emitting diode, infrarede emitting diode, the hair of blue light-emitting to glow
Optical diode or ultraviolet LED.Here, marking the light cone of red or the light beam of red with R, blueness is marked with B
Light cone or blueness light beam.The light emitting diode 5 also can be dual light emitting diode 50 or multicolor luminous two pole
Pipe, such as RGB light emitting diodes.By suitably pulsedly manipulating this light emitting diode 50 and by attaching troops to a unit in time
The corresponding, sensor signal from the optical sensor 6 is assessed it is possible that the particle of the smoke particle to detecting is big in ground
Small and/or color carries out spectrum, the technical assessment of fire.Thus it is possible that determine smog type and fire type with
And differentiated alarm.
Fig. 2 shows the second embodiment with two minute surfaces S1, S2.Compared with previous example, the second minute surface is provided with
S2, second minute surface are opposed with the optical sensor 6 and with such mirror geometry so that the first initial scattering
Light center Z1（When without the second minute surface S2）It can be expanded with the described second scattering light center Z2.As such, it is advantageous to more thickness
The scattering light of mist particulate reaches the optical sensor 6 from the scattering light center Z being expanded.The first and second scatterings light center
Z1, Z2 also can be partly overlapping.
Fig. 3 shows the 3rd embodiment party according to the present invention, with the thermal radiation sensor 9 for being used to detect environment temperature T
Formula.Compared to Figure 1, the optical sensor 6 is arranged on the circuit carrier 7 in the center of the alarm housing 2 now.Shape
Surround through the center of the smoke alarm 1 and prolong now into the scattering body of light product Z in the inner space IR of the alarm housing 2
Main shaft SA or rotation axis in stretch, structure.With invade the direction of the smog in the optical measurement chamber independently,
Equally rapidly carry out the smoke detection.In addition, the cover plate 8 exemplarily also forms other ligh trap LF.
According to the present invention, thermal radiation sensor 9 is accommodated in the alarm housing 2, the thermal radiation sensor for
Thermal radiation responsive and non-contact operation in middle infrared, the thermal radiation sensor is to be likewise constructed to SMD components
The form of thermoelectric pile is present.The thermal radiation sensor 9 is equally arranged in center and in the circuit with the optical sensor 6
On carrier 7.Hot optical, taper the detection range of the thermal radiation sensor 9 is marked with W.The detection range W is limited herein
At the inner side IS of the alarm cover 4（Virtual）Measurement surface MF, to detect the case temperature of there.
In other words, detected from this measurement surface MF towards the heat radiation and sensed by the thermal radiation sensor 9
The heat radiation launched on the direction of device 9.It can be exported in temperature existing for the measurement surface, institute by the heat radiation detected
State temperature substantially follow the scattered light smoke warner 1 close to environment in environment temperature T.Such as fire is occurring
When the temperature change that occurs most can be detected soon at following summit SP.In the structure of the scattered light smoke warner 1
Main shaft SA also through this point SP.This point is therefore opposed with the measurement surface MF.The environment temperature T is due to the report
Alert device cover 4, thin housing wall and after short times, be for example applied to after 10s at the measurement surface MF
On the IS of inner side.In order to accelerate in time, the alarm cover 4 can have heat conduction special in measurement surface MF scope
Good plastics or one block of metal, such as copper.The thermal radiation sensor 9 is connected in outlet side with described control unit 10, should
Export corresponds to the environment to control unit from the hot transducing signal exported by the thermal radiation sensor 9 in a manner of calculating
Temperature T temperature value, and consider this temperature value simultaneously when exporting the alarm of fire.
Fig. 4 shows the 4th embodiment according to the present invention, having two minute surfaces S1, S2 and two scattering optical assemblies.
In this example, the wall thickness of the alarm cover 4 is substantially than big in the example of foregoing figures.Thus, especially second mirror
Face S2 mirror geometry is targetedly adapted in addition to previously given also by the outline of the alarm cover 4,
So that the light beam or light cone B that are sent by opposed light emitting diode 52 are targetedly focused in the ligh trap LF.It is described
Second minute surface S2 is partly embedded in or is recessed at this in alarm cover 4.
Produce in the example in fig. 4 with two mutually different scattering angular and with two mutually different scatterings
Light center ZR、ZBTwo scattering optical assemblies.The scattering light center can overlap at least in part.It is logical by suitably assessing
The light that the optical sensor 6 is received accordingly is crossed, herein it is also possible that carrying out the technical assessment of fire.Two hairs
Optical diode 51,52 can be same type, such as infrarede emitting diode.By it is corresponding, from different scattering angular
The same chromatic dispersion light detected can determine the smog type.
Fig. 5 show according to the present invention, have be used in fire alarm meaning detect environment temperature T and detection naked light
Thermal radiation sensor 9 the 5th embodiment.According to the present invention, compared with Fig. 4, the alarm cover 4 is in the central area
Have in the MF of domain, i.e. in the region of the measurement surface only for being transparent housing component for the heat radiation in middle infrared
11.This housing component can so carry out configuration so that this housing component does not optically have area with remaining alarm housing 2
Not.The housing component 11 additionally forms optical lens, to expand optical detection scope W.Described control unit 10 is set
For, according to it is in fire alarm meaning, for the naked light either significant fluctuation of raging flames or flash frequency
Occur to monitor the hot transducing signal exported by the thermal radiation sensor 9, and examined simultaneously when exporting the alarm of fire
Consider the hot transducing signal exported by the thermal radiation sensor 9.Additionally, described control unit 10 is provided for, from the heat
The temperature value corresponding to the environment temperature T is exported in a manner of calculating in the constant component of transducing signal, and should in output
Equally consider this temperature value simultaneously during alarm of fire.In addition, all components 5,6,10 shown are all disposed within and the cover plate 8
Opposed circuit carrier side.Exist in the circuit carrier 7 for the light emitting diode 5 and for the optical sensor 6
Corresponding pass through opening DO.
Finally, Fig. 6 is shown according to top view of Fig. 5 embodiment along there the direction of observation VI drawn.At this
Visual angle, especially it can be seen that as in the thin slice LAM and the optical sensor 6 and thermal radiation sensor 9 of light shielding element
The arrangement of the heart.Fig. 6 also shows that the hull shape of the substantially rotational symmetry of the scattered light smoke warner 1.Also it can understand and see
To the light absorptive structure AB of large area of the plastic cover plate 8 on the circuit carrier 7.
Reference numerals list
1 fire-alarm, smoke alarm, danger detector
2 alarm housings
3 matrixes
4 alarm covers, vault, cover plate, lid
5 light emitting diodes, optical transmitting set
6 optical sensors, optical receiver
7 circuit carriers, circuit board
8 plastic cover plates, plastic plate
9 thermal radiation sensors, thermoelectric pile, bolometer
10 control units, microcontroller
11 central housing components
50 dichromatic LEDs（Dual-colored LED）
51st, 52 light emitting diodes, infrarede emitting diode（IR-LED）, ultraviolet LED（UV-LED）
A optical axials
AB light absorptive structures
AN connecting sides
On the outside of AS
B bluenesss light cone, blue light beam
BL apertures
DO passes through opening
E optics receiving area
IR inner spaces
On the inside of IS
LAM thin slices
LF ligh traps
MF measurement surfaces, measurement piece
OF enters cigarette opening
R red light cone, red beam
SA optical axials, the axis of symmetry, main shaft
S, S1, S2 minute surface, mirror
SP summits
T temperature, environment temperature
The hot detection ranges of W, visual field（FOV）
Z, Z1, Z2 scattering center, intersecting volume, measurement volume
ZBBlue scattering center
ZRRed scattering center
Claims (14)
1. scattered light smoke warner, it has the optical measurement chamber being connected with surrounding air, wherein, the measurement chamber is contained in
Alarm housing（2）Inside（IR）In and by matrix（3）With the alarm housing（2）Alarm cover（4）Gauge, its
In, in described matrix（3）In accommodate circuit carrier（7）, wherein, in the circuit carrier（7）The upper and optical measurement chamber
The light emitting diode being adjacently disposed with optical assembly is scattered（5）And optical sensor（6）, wherein, the light emitting diode（5）
With the optical sensor（6）Respectively have at least almost with the circuit carrier（7）Orthogonal optical axial（A）, wherein, it is described
Light emitting diode（5）With the optical sensor（6）With the alarm cover（4）The inner side of chamber is measured described in gauge（IS）It is opposed,
Wherein, the inner side（IS）A part there is at least one minute surface（S）, the minute surface and the light emitting diode（5）It is opposed,
And wherein, the minute surface（S）With such mirror geometry so that the light emitting diode（5）Light cone（R、B）
Positioned at the first scattering body of light product of the measurement intracavitary（Z1、Z）In with the optical sensor（6）Receiving area（E）It is intersecting, and
And the light cone（R、B）The alarm housing with the measurement chamber is actually contactlessly traversed after its reflection（2）It is interior
Portion space（IR）And it is imported into light absorptive ligh trap（LF）In.
2. scattered light smoke warner according to claim 1, wherein, the inner side（IS）A part have at least one
Individual other minute surface（S2）, at least one other minute surface and the optical sensor（6）The opposed and mirror with as
Sub- geometry so that the first scattering body of light product（Z1）Can be with the second scattering body of light product（Z2）It is expanded.
3. the scattered light smoke warner according to claims 1 or 2, wherein, in the circuit carrier（7）Lid is installed
Plate（8）, the cover plate, which has, is used for the light emitting diode（5）With for the optical sensor（6）Groove, and wherein,
The cover plate（8）It is especially integral and there is at least one aperture（BL）, ligh trap（LF）And/or light absorptive structure（AB）.
4. scattered light smoke warner according to any one of the preceding claims, wherein, the alarm cover（4）It is interior
Side（IS）, except at least one minute surface（S）Outside, also with light absorptive structure（AB）, especially black glossy fold
And/or light absorptive coating.
5. scattered light smoke warner according to any one of the preceding claims, wherein, there is the alarm cover（4）
Alarm housing（2）With substantially rotational symmetry or mirror image outline.
6. scattered light smoke warner according to claim 5, wherein, the alarm cover（4）Foreign steamer with protrusion
Internal periphery that is wide and being at least partially recessed into, and wherein, corresponding minute surface（S）In the alarm cover（4）Inner side（IS）Place
With following the alarm cover（4）The Internal periphery being at least partially recessed into mirror geometry.
7. according to the scattered light smoke warner described in claim 5 or 6, wherein, the optical sensor（6）It is arranged in described
Alarm housing（2）Center so that formed in the alarm housing（2）Inner space（IR）In scattering body of light
Product（Z）Surround main shaft that the center through the smoke alarm extends, in structure（SA）.
8. scattered light smoke warner according to any one of the preceding claims, wherein, in the circuit carrier（7）On
It is disposed with least one other light emitting diode（52）, at least one other light emitting diode have and the circuit
Carrier（7）Orthogonal optical axial（A）, wherein, at least one other light emitting diode（52）In at least one cloth
Put with first light emitting diode（5、51）It is adjacent, or with first light emitting diode（5、51）Formed double-colored or more
Color light emitting diode（50）As incorporated light electronic component, wherein, at least one other light emitting diode（52）With
First light emitting diode（5、51）Minute surface（S）It is opposed, and wherein, by corresponding light emitting diode（50、51、52）Hair
The light gone out has wavelength different from each other.
9. scattered light smoke warner according to claim 8, wherein, first light emitting diode（51）Be it is red or
Person's infrarede emitting diode, second light emitting diode（52）It is that blueness either UV light emitting diodes or is combined in pairs
Color light emitting diode（50）.
10. scattered light smoke warner according to any one of the preceding claims, it has electronic control unit（10）,
The electronic control unit and corresponding light emitting diode（5、51、52）With the optical sensor（6）Connection, and wherein, such as
Fruit is associated with corresponding light emitting diode（5、51、52）Sensor signal exceed scattering optical extremes or combination dissipate
Optical extremes are penetrated, then described control unit（10）Export alarm of fire.
11. scattered light smoke warner according to claim 10, wherein, in the alarm housing（2）In accommodate
Thermal radiation sensor（9）, the thermal radiation sensor for the thermal radiation responsive and non-contact operation in middle infrared,
Wherein, the thermal radiation sensor（9）Especially thermoelectric pile or bolometer, wherein, the thermal radiation sensor（9）
It is optically aligned with the alarm cover（4）Inner side（IS）The middle section at place（MF）, to detect the housing temperature of there
Degree, the case temperature substantially follow the scattered light smoke warner close to environment in environment temperature（T）, its
In, described control unit（10）With the thermal radiation sensor（9）Connect and be provided in a manner of calculating from by described
Thermal radiation sensor（9）Export corresponds to the environment temperature in the hot transducing signal of output（T）Temperature value and exporting
Consider this temperature value simultaneously during the alarm of fire.
12. scattered light smoke warner according to claim 10, wherein, in the alarm housing（2）In accommodate
Thermal radiation sensor（9）, the thermal radiation sensor for the thermal radiation responsive and non-contact operation in middle infrared,
Wherein, the thermal radiation sensor（9）Especially thermoelectric pile, bolometer or photodiode, wherein, the hot spoke
Penetrate sensor（9）It is optically aligned with the alarm cover（4）Inner side（IS）The middle section at place（MF）, to detect that
In case temperature, wherein, the alarm cover（4）Including housing component（11）, the housing component comprises at least the alarm
Cover（4）Middle section（MF）, the housing component only for being transparent for the heat radiation in the middle infrared, and
And wherein, described control unit（10）With the thermal radiation sensor（9）Connect and be provided for, according to for naked light or
The significant fluctuation of raging flames or the appearance of flash frequency are monitored by the thermal radiation sensor（9）The heat sensing of output
Signal, and consider simultaneously by the thermal radiation sensor when exporting the alarm of fire（9）The hot transducing signal of output.
13. scattered light smoke warner according to claim 12, wherein, described control unit（10）It is additionally provided in using
In being exported from the constant component of the hot transducing signal in a manner of calculating corresponding to the environment temperature（T）Temperature value,
And equally consider to correspond to the environment temperature simultaneously when exporting the alarm of fire（T）Temperature value.
14. according to the scattered light smoke warner described in claim 12 or 13, wherein, it can be penetrated only for for heat radiation
Housing component（11）Optical lens is formed, to expand the thermal radiation sensor（9）Optical detection scope（W）.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP15180045.5A EP3128493A1 (en) | 2015-08-06 | 2015-08-06 | Scattered light smoke detector with optical measurement chamber in detector housing and with a mirror surface on the inside of a detector hood as part of the detector housing |
| EP15180045.5 | 2015-08-06 | ||
| PCT/EP2016/067794 WO2017021217A1 (en) | 2015-08-06 | 2016-07-26 | Light-scattering smoke detector having an optical measurement chamber accommodated in the detector housing and having a mirror surface on an inner face of a detector hood as part of the detector housing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107851355A true CN107851355A (en) | 2018-03-27 |
| CN107851355B CN107851355B (en) | 2020-03-17 |
Family
ID=53783596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680046315.7A Active CN107851355B (en) | 2015-08-06 | 2016-07-26 | Scattered-light smoke alarm with an optical measuring chamber in the alarm housing and a mirror surface which is part of the housing on the inside of the alarm cover |
Country Status (3)
| Country | Link |
|---|---|
| EP (2) | EP3128493A1 (en) |
| CN (1) | CN107851355B (en) |
| WO (1) | WO2017021217A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10809173B2 (en) | 2017-12-15 | 2020-10-20 | Analog Devices, Inc. | Smoke detector chamber boundary surfaces |
| KR102638997B1 (en) * | 2017-12-15 | 2024-02-20 | 아나로그 디바이시즈 인코포레이티드 | Compact optical smoke detector system and apparatus |
| US11788942B2 (en) | 2017-12-15 | 2023-10-17 | Analog Devices, Inc. | Compact optical smoke detector system and apparatus |
| USD874964S1 (en) | 2018-11-06 | 2020-02-11 | Analog Devices, Inc. | Blocking members in a smoke detector chamber |
| USD920825S1 (en) | 2018-11-06 | 2021-06-01 | Analog Devices, Inc. | Smoke detector chamber |
| US10921367B2 (en) | 2019-03-06 | 2021-02-16 | Analog Devices, Inc. | Stable measurement of sensors methods and systems |
| US11796445B2 (en) | 2019-05-15 | 2023-10-24 | Analog Devices, Inc. | Optical improvements to compact smoke detectors, systems and apparatus |
| WO2021115728A1 (en) * | 2019-12-10 | 2021-06-17 | Siemens Schweiz Ag | Smoke detection unit for a fire alarm with basic pulse suppression, and suitable method for detecting smoke |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0588232A1 (en) * | 1992-09-14 | 1994-03-23 | Cerberus Ag | Optic smoke detector |
| DE19741853A1 (en) * | 1997-09-23 | 1999-03-25 | Bosch Gmbh Robert | Hollow ellipse smoke alarm |
| CN1297213A (en) * | 1999-11-19 | 2001-05-30 | 西门子建筑技术公司 | Fire alarm device |
| US20020154018A1 (en) * | 2001-04-24 | 2002-10-24 | Matsushita Electic Works, Ltd. | Fire detector unit |
| CN1675659A (en) * | 2002-06-20 | 2005-09-28 | 瑞士西门子有限公司 | Fire detector |
| CN201616160U (en) * | 2009-05-26 | 2010-10-27 | 官洪运 | Multi-waveband infrared image-type large-space fire detector |
-
2015
- 2015-08-06 EP EP15180045.5A patent/EP3128493A1/en not_active Withdrawn
-
2016
- 2016-07-26 WO PCT/EP2016/067794 patent/WO2017021217A1/en unknown
- 2016-07-26 EP EP16745687.0A patent/EP3332395B1/en active Active
- 2016-07-26 CN CN201680046315.7A patent/CN107851355B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0588232A1 (en) * | 1992-09-14 | 1994-03-23 | Cerberus Ag | Optic smoke detector |
| DE19741853A1 (en) * | 1997-09-23 | 1999-03-25 | Bosch Gmbh Robert | Hollow ellipse smoke alarm |
| CN1297213A (en) * | 1999-11-19 | 2001-05-30 | 西门子建筑技术公司 | Fire alarm device |
| US20020154018A1 (en) * | 2001-04-24 | 2002-10-24 | Matsushita Electic Works, Ltd. | Fire detector unit |
| CN1675659A (en) * | 2002-06-20 | 2005-09-28 | 瑞士西门子有限公司 | Fire detector |
| CN201616160U (en) * | 2009-05-26 | 2010-10-27 | 官洪运 | Multi-waveband infrared image-type large-space fire detector |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3128493A1 (en) | 2017-02-08 |
| EP3332395A1 (en) | 2018-06-13 |
| WO2017021217A1 (en) | 2017-02-09 |
| CN107851355B (en) | 2020-03-17 |
| EP3332395B1 (en) | 2019-05-22 |
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