CN202650184U - Obscuration-forward scatter composite spot-type photoelectric smoke fire detector - Google Patents
Obscuration-forward scatter composite spot-type photoelectric smoke fire detector Download PDFInfo
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- CN202650184U CN202650184U CN 201220206838 CN201220206838U CN202650184U CN 202650184 U CN202650184 U CN 202650184U CN 201220206838 CN201220206838 CN 201220206838 CN 201220206838 U CN201220206838 U CN 201220206838U CN 202650184 U CN202650184 U CN 202650184U
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Abstract
The utility model relates to an obscuration-forward scatter composite spot-type photoelectric smoke fire detector, and belongs to the technical field of fire detection. The obscuration-forward scatter composite spot-type photoelectric smoke fire detector is the optimal combination of an obscuration photoelectric smoke detector and a forward photoelectric smoke detector. The detector comprises a smoke-sensing maze which is composed of a maze cover and a maze pedestal. The detector is characterized in that the inside of the smoke-sensing maze is provided with a first infrared luminescent tube, a second infrared luminescent tube and an infrared receiving tube, wherein the included angle COA taking the center of the smoke-sensing maze as the angular point between the second infrared luminescent tube and the infrared receiving tube is 123-139 degrees, the included angle BOA taking the center of the smoke-sensing maze as the angular point between the first infrared luminescent tube and the infrared receiving tube is 180 degrees, and the first infrared luminescent tube, the second infrared luminescent tube and the infrared receiving tube are separately connected with a control circuit.
Description
Technical field:
The utility model belongs to the fire detection technology field, particularly relates to a kind of dim light and forward scattering and recovers box-like spot-type photoelectric smoke detector.
Background technology:
Spot-type photoelectric smoke detector is present automatic fire detection-alarm field output maximum and the most widely used fire detector.Spot-type photoelectric smoke detector can be divided into astigmatic formula (using smoke particle to light scattering principle) and dim light formula (use smoke particle light path is blocked principle) two large classes by the difference of Fundamentals of Sensors.Dim light formula smoke detector has preferably response for black smog, but relatively poor for the low concentration white smoke response sensitivity of during Initial Stage of Fire generation, is significantly less than astigmatic formula smoke detector.Astigmatism formula smoke detector is divided into again two kinds of forward direction astigmatism formula and backward astigmatic formulas, wherein scattering angle greater than 90 ° forward direction astigmatism formula smoke detector because simple in structure, so spot-type photoelectric smoke detector adopts forward direction astigmatism formula smoke detector mostly for a long time, it has higher response sensitivity to larger white and the grey smog (such as thermal decomposition of wood smoldering fire, cotton cord hidden combustion fire etc.) of particle diameter that during Initial Stage of Fire produces, and the black smog less to particle diameter (such as polyurethane plastics naked light, normal heptane naked light etc.) response sensitivity is relatively poor; To such an extent as in some application places, when during Initial Stage of Fire occurs incuring loss through delay when main and reports to the police even fail to report accident to produce black smoke.In order to solve this defective of forward direction astigmatism formula smoke detector, in recent years, people develop again scattering angle less than 90 °, the backward astigmatic formula smoke detector of complicated structure, although it has improved the response sensitivity to black smog, it but is significantly less than forward direction astigmatism formula smoke detector to the response sensitivity of white smoke.Single dim light formula, forward direction astigmatism formula, backward astigmatic formula smoke detector all are difficult to the wide spectrum smog of different colours, different-grain diameter is reached balanced sensitive response performance, nor effectively Zhen Do smog, water vapour, oil smoke and dust, so that the rate of false alarm of working in the environment such as dust, water vapour, oil smoke are arranged is higher.
The utility model content:
For the realistic problem that present single dim light formula or astigmatic formula smoke detector are relatively poor to the balanced sensitive response performance of wide spectrum smog, rate of false alarm is higher, the utility model provides a kind of wide spectrum smoke particle based on different colours, different-grain diameter and non-smoke particles such as water vapour, oil smoke, dust to the blocking with scattering properties and quantize the achievement in research of rule of infrared light, and box-like spot-type photoelectric smoke detector is recovered in the dim light and the forward scattering that dim light formula and two kinds of optical detector of fire smokes of forward direction astigmatism formula are optimized combination.
To achieve these goals, the utility model adopts following technical scheme, box-like spot-type photoelectric smoke detector is recovered in a kind of dim light and forward scattering, comprise the sense cigarette labyrinth that is formed by labyrinth lid and labyrinth base combination, be characterized in being provided with the first infraluminescence pipe, the second infraluminescence pipe and infrared receiving tube in inside, described sense cigarette labyrinth; Center, the angle ∠ COA between the infrared receiving tube in described the second infraluminescence pipe and sense cigarette labyrinth are 123 °～139 °, the center in described the first infraluminescence pipe and sense cigarette labyrinth, the angle ∠ BOA between the infrared receiving tube are 180 °, and described the first infraluminescence pipe, the second infraluminescence pipe are connected with control circuit respectively with infrared receiving tube.
Center, the angle ∠ COA between the infrared receiving tube in described the second infraluminescence pipe and sense cigarette labyrinth are preferably 129 °～135 °.
More preferably 132 ° of center, the angle ∠ COA between the infrared receiving tube in described the second infraluminescence pipe and sense cigarette labyrinth.
It is 10 that described labyrinth lid and labyrinth base adopt conductivity
8The conduction ABS raw material casting of S/cm forms.
Described control circuit comprises signal processing circuit, telecommunication circuit, emission control circuit, photosignal change-over circuit, signal amplification and filtering circuit, fire alarm control unit and power circuit, signal processing circuit is connected with fire alarm control unit by telecommunication circuit, signal processing circuit is connected with emission control circuit, the output terminal of photosignal change-over circuit amplifies with signal and the input end of filtering circuit is connected, and signal amplifies and the output terminal of filtering circuit is connected with signal processing circuit; Power circuit amplifies with telecommunication circuit, emission control circuit, photosignal change-over circuit, signal processing circuit and signal respectively and filtering circuit is connected.
Described emission control circuit comprises the first infraluminescence pipe, the second infraluminescence pipe, the 22 resistance, the 24 resistance, the positive pole of the first infraluminescence pipe and the second infraluminescence pipe is connected with the positive pole of power supply respectively, the negative pole of the second infraluminescence pipe is connected through the collector of the 22 resistance with the 4th triode, the emitter of the 4th triode is connected to the ground and connects, and the base stage of the 4th triode is connected with the control port of single-chip microcomputer through the 23 resistance; The negative pole of the first infraluminescence pipe is connected through the collector of the 24 resistance with the 5th triode, and the emitter of the 5th triode is connected to the ground and connects, and the base stage of the 5th triode is connected with the control port of single-chip microcomputer through the 8th resistance.
Described photosignal change-over circuit comprises infrared receiving tube, the 9th resistance, the tenth resistance, the 6th electric capacity and the 7th electric capacity, and the positive pole of power supply is connected with the negative pole of infrared receiving tube, the negative pole of the 7th electric capacity respectively through the 9th resistance; The positive pole of infrared receiving tube is connected to the ground through the tenth resistance and connects, and the positive pole of the 7th electric capacity is connected to the ground and connects, and is parallel with the 6th electric capacity at the two ends of the tenth resistance, and the positive pole of infrared receiving tube amplifies with signal and the input end of filtering circuit is connected.
Described signal amplifies and filtering circuit comprises first order amplifier, second level amplifier, the positive input one tunnel of second level amplifier is connected through the output terminal of the 5th electric capacity with first order amplifier, another Lu Jingdi 13 resistance are connected to the ground and connect, the positive input of first order amplifier is the input end of signal amplification and filtering circuit, the reverse input end of first order amplifier is connected to the ground through the 11 resistance and connects, and is parallel with the 12 resistance and the 12 electric capacity between the reverse input end of first order amplifier and output terminal; The output terminal of second level amplifier is connected with the input end of single-chip microcomputer; The reverse input end of second level amplifier is connected to the ground through the 14 resistance and connects, and is parallel with the 15 resistance and the 13 electric capacity between the reverse input end of second level amplifier and output terminal.
Described telecommunication circuit comprises communications reception circuit and the answer circuit of communicating by letter, described communications reception circuit comprises the 18 resistance, the 19 resistance, the 20 resistance, the 21 resistance, the 3rd electric capacity, the 4th electric capacity and the 3rd triode, the positive pole of power supply is connected through the collector of the 21 resistance with the 3rd triode, and the emitter of the 3rd triode is connected to the ground and connects; The collector of the 3rd triode is connected with the input/output end port of single-chip microcomputer, between the base stage of the positive pole of power supply and the 3rd triode, be connected with the 20 resistance, between the collector of the 3rd triode and emitter, be connected with the 4th electric capacity, between the base stage of the 3rd triode and emitter, be connected with the 19 resistance; The base stage of the 3rd triode is connected with antenna through the 18 resistance, the 3rd electric capacity successively; Described communication is answered circuit and is comprised the 16 resistance, the second triode and the 17 resistance, the base stage of the second triode is connected with the input/output end port of single-chip microcomputer through the 16 resistance, the emitter of the second triode is connected to the ground and connects, and the collector of the second triode is connected with antenna through the 17 resistance.
Described signal processing circuit is comprised of single-chip microcomputer and peripheral circuit thereof.
The principle of work of detector of the present utility model is as follows:
Dim light and forward scattering are recovered and are provided with 2 infraluminescence pipe B, C in the box-like spot-type photoelectric smoke detector, and infraluminescence pipe B, C have consisted of dim light formula and two kinds of smoke detection light paths of forward direction astigmatism formula with 1 infrared receiving tube A respectively.2 infraluminescence pipe B, C are luminous by single-chip microcomputer timesharing control, infrared receiving tube A Synchronous Receiving infrared light strength signal.Forward scattering light sensation cigarette principle of work is: when in the detector during non smoke, infrared receiving tube A only can receive the radiative faint light intensity of infraluminescence pipe C; When having smog to enter detector, because light runs into smoke particle generation forward scattering effect, the light intensity that infrared receiving tube A is received increases, enter the smoke particle more (smoke density is larger) in the detector, the light intensity that infrared receiving tube A receives is then larger, reach the purpose of fire smoke detection after light/electric signal conversion, forward direction astigmatism formula sense smoking set has the larger sensitive characteristic of white smoke response of pair particle diameter.Dim light sense cigarette principle of work is: when in the detector during non smoke, the light that is sent by infraluminescence pipe B is not blocked shines infrared receiving tube A, when having smog to enter detector, because smog blocks effect to light, the light intensity that shines infrared receiving tube A is weakened, enter the smoke particle more (smoke density is larger) in the detector, then more decay of the light intensity received of infrared receiving tube A, thereby reach the purpose of fire smoke detection, dim light formula sense smoking set has pair sensitive characteristic of black smog response.
The beneficial effects of the utility model:
1. wide spectrum sense cigarette:
Detector of the present utility model has good balanced sensitive response performance to the smoke particle of different colours, different-grain diameter, particularly the material normal temperature black smog that produces that glows had sensitiveer detection feature, can Effective Raise early fire detection alert capability in engineering is used, thoroughly do away with fire and produce the black smoke place and the dangerous situation of warning occurs failing to report or incuring loss through delay.
2. hang down rate of false alarm:
Detector of the present utility model has consisted of forward scattering light and two kinds of smoke detection light paths of dim light by 2 infraluminescence pipes and 1 infrared receiving tube, and by great many of experiments grasped typical smoke particle and non-smoke particle in this detector to the scattering properties of infrared light with quantize rule, take the effective Zhen Do of algorithm process technology smog, water vapour, oil smoke and dust etc., thereby greatly reduce the rate of false alarm that detector is subjected to such environmental effects.
3. good cost performance:
Owing to having taked following measures, having made detector cost of the present utility model a little less than present domestic single forward scattering or Back spot-type photoelectric smoke detector.(1) labyrinth of detector of the present utility model lid and labyrinth base employing conductivity are 10
8The conduction ABS raw material casting of S/cm forms, and has essence shielding electromagnetic wave and antistatic effect, can save traditional copper or stainless steel shielding cover; (2) adopt electronics to compile (address) code and the programmable bus communication technology, saved 8 toggle switchs and private communication chip; (3) detection circuit of the present utility model is compared with the photoelectric smoke detection circuit of common single sensing mode only increases by 1 infraluminescence pipe.
4. flexible with system compatible:
Detector of the present utility model adopts the mode of software programming can support any bus communication protocol, and changing detector hardware circuit and structure by programming, need not can be compatible with the fire alarm control unit wide area of any producer.
Detector of the present utility model has good balanced sensitive response performance to particle diameter less black smog and the larger light smog of particle diameter in itself, particularly the during Initial Stage of Fire material normal temperature black smog that produces that glows there is sensitiveer detection feature, be a kind of novel photoelectric smoke fire detector with wide spectrum smoke detection performance, reducing wrong report, stopping to fail to report the spot-type photoelectric smoke detector that the aspects such as fire, raising fire early detection warning performance are better than tradition (single forward direction astigmatism formula, backward astigmatic formula or dim light formula).
Detector general technical level of the present utility model and combination property have reached the earlier 2000s international most advanced level, the selling price of same kind of products at abroad higher (more than 50 dollars), and detector of the present utility model is with low cost, only in 30 yuans.The development and application of detector of the present utility model for China complex building place provides fire detecting and alarm new technology, the new product be badly in need of, to reducing the loss of fire, is safeguarded people's lives and properties and will be played significant role with economic construction.Its operation and apply and not only can satisfy China to the new demand of security against fire, also alternative imported product for country saves a large amount of foreign exchanges, will produce significant economic results in society.
Description of drawings:
Fig. 1 is the structural representation of detector of the present utility model;
Fig. 2 is the schematic block circuit diagram of the control circuit of detector of the present utility model;
Fig. 3 is the circuit theory diagrams of emission control circuit in the control circuit of detector of the present utility model;
Fig. 4 is the circuit theory diagrams of photosignal change-over circuit in the control circuit of detector of the present utility model;
Fig. 5 is that signal amplifies and the circuit theory diagrams of filtering circuit in the control circuit of detector of the present utility model;
Fig. 6 is the circuit theory diagrams of telecommunication circuit in the control circuit of detector of the present utility model;
Among Fig. 1,1-infrared receiving tube, 2-labyrinth lid, the center in 3-sense cigarette labyrinth, 4-sense cigarette labyrinth, 5 first infraluminescence pipes, 6-labyrinth base, 7-the second infraluminescence pipe.
Embodiment:
As shown in Figure 1, box-like spot-type photoelectric smoke detector is recovered in a kind of dim light and forward scattering, comprise the sense cigarette labyrinth 4 that is combined by labyrinth lid 2 and labyrinth base 6, be provided with the first infraluminescence pipe 5, the second infraluminescence pipe 7 and infrared receiving tube 1 in 4 inside, described sense cigarette labyrinth; The center 3 in described the second infraluminescence pipe 7 and sense cigarette labyrinth, the angle ∠ COA between the infrared receiving tube 1 are 132 °, the center 3 in described the first infraluminescence pipe 5 and sense cigarette labyrinth, the angle ∠ BOA between the infrared receiving tube 1 are 180 °, and described the first infraluminescence pipe 5, the second infraluminescence pipe 7 are connected with control circuit respectively with infrared receiving tube 1.
It is 10 that described labyrinth lid 2 and labyrinth base 6 adopt conductivity
8The conduction ABS raw material casting of S/cm forms, and has essence shielding electromagnetic wave and antistatic effect, can save traditional copper or stainless steel shielding cover.Described sense cigarette labyrinth 4 can prevent effectively that the interference sources such as external environment light and insect from entering in the detector of the present utility model.
As shown in Figure 2, described control circuit comprises signal processing circuit, telecommunication circuit, emission control circuit, photosignal change-over circuit, signal amplification and filtering circuit, fire alarm control unit and power circuit, signal processing circuit is connected with fire alarm control unit by telecommunication circuit, signal processing circuit is connected with emission control circuit, the output terminal of photosignal change-over circuit amplifies with signal and the input end of filtering circuit is connected, and signal amplifies and the output terminal of filtering circuit is connected with signal processing circuit; Power circuit amplifies with telecommunication circuit, emission control circuit, photosignal change-over circuit, signal processing circuit and signal respectively and filtering circuit is connected.
As shown in Figure 3, described emission control circuit comprises the first infraluminescence pipe A, the second infraluminescence pipe B, the 22 resistance R 22, the 24 resistance R 24, the positive pole of the first infraluminescence pipe A and the second infraluminescence pipe B is connected with the positive pole of power supply respectively, the negative pole of the second infraluminescence pipe B is connected with the collector of the 4th triode T4 through the 22 resistance R 22, the emitter of the 4th triode T4 is connected to the ground and connects, and the base stage of the 4th triode T4 is connected with the control port RC4 of single-chip microcomputer U1 through the 23 resistance R 23; The negative pole of the first infraluminescence pipe A is connected with the collector of the 5th triode T5 through the 24 resistance R 24, and the emitter of the 5th triode T5 is connected to the ground and connects, and the base stage of the 5th triode T5 is connected with the control port RC3 of single-chip microcomputer U1 through the 8th resistance R 8.In emission control circuit, controlled respectively the luminous intensity of infraluminescence pipe A, B by current-limiting resistance R24, R22, by the output terminal RC3 of single-chip microcomputer U1, the luminance of RC4 timesharing control infraluminescence pipe A, B, the pulsed illumination mode is modulated to 100 μ S/S, that is: luminous 100 microseconds of per second, thus can guarantee that the infraluminescence plumber does the life-span up to more than 100 years.
As shown in Figure 4, described photosignal change-over circuit comprises infrared receiving tube C, the 9th resistance R 9, the tenth resistance R 10, the 6th capacitor C 6 and the 7th capacitor C 7, and the positive pole of power supply is connected with the negative pole of infrared receiving tube C, the negative pole of the 7th capacitor C 7 respectively through the 9th resistance R 9; The positive pole of infrared receiving tube C is connected to the ground through the tenth resistance R 10 and connects, and the positive pole of the 7th capacitor C 7 is connected to the ground and connects, and is parallel with the 6th capacitor C 6 at the two ends of the tenth resistance R 10, and the positive pole of infrared receiving tube C amplifies with signal and the input end SI of filtering circuit is connected.The photosignal change-over circuit can be converted to the infrared light strength signal that receives Voltage-output signal SI, single-chip microcomputer U1 takes the timesharing light emitting control to infraluminescence pipe A, B, and synchronous acquisition SI amplifying signal ADI, thereby forward scattering sense smoke signal and back scattering sense smoke signal are made a distinction, and C7 and C6 play voltage stabilizing and filter action.
As shown in Figure 5, described signal amplifies and filtering circuit comprises first order amplifier F1, second level amplifier F2, the positive input one tunnel of second level amplifier F2 is connected through the output terminal of the 5th capacitor C 5 with first order amplifier F1, another Lu Jingdi 13 resistance R 13 are connected to the ground and connect, the positive input of first order amplifier F1 is the input end SI of signal amplification and filtering circuit, the reverse input end of first order amplifier F1 is connected to the ground through the 11 resistance R 11 and connects, and is parallel with the 12 resistance R 12 and the 12 capacitor C 12 between the reverse input end of first order amplifier F1 and output terminal; The output terminal of second level amplifier F2 is connected with the input end ADI of single-chip microcomputer U1; The reverse input end of second level amplifier F2 is connected to the ground through the 14 resistance R 14 and connects, and is parallel with the 15 resistance R 15 and the 13 capacitor C 13 between the reverse input end of second level amplifier F2 and output terminal.The ADI voltage signal of the output signal SI of photosignal change-over circuit after two-stage is amplified received by the input end RA0 of single-chip microcomputer U1, single-chip microcomputer U1 includes 8 scale-of-two A/D converters, can be that resolution is 0～255 digital signal with ADI voltage signal linear transformation, first order enlargement factor is determined by the ratio of R12/R11, C5 and R13 can filter out the background DC voltage composition in the first order amplifying signal, allow by the smoke detection pulse signal; Filtered first order amplifying signal carries out the second level again and amplifies, and second level enlargement factor is by the ratio decision of R15/R14, and the ADI voltage signal that makes output is 0.30V～4.70V, and C12, C13 work to suppress SI glitch signal.
As shown in Figure 6, described telecommunication circuit comprises communications reception circuit and the answer circuit of communicating by letter, described communications reception circuit comprises the 18 resistance R 18, the 19 resistance R 19, the 20 resistance R 20, the 21 resistance R 21, the 3rd capacitor C 3, the 4th capacitor C 4 and the 3rd triode T3, the positive pole of power supply is connected with the collector of the 3rd triode T3 through the 21 resistance R 21, and the emitter of the 3rd triode T3 is connected to the ground and connects; The collector of the 3rd triode T3 is connected with the input/output end port RC0 of single-chip microcomputer U1, between the base stage of the positive pole of power supply and the 3rd triode T3, be connected with the 20 resistance R 20, between the collector of the 3rd triode T3 and emitter, be connected with the 4th capacitor C 4, between the base stage of the 3rd triode T3 and emitter, be connected with the 19 resistance R 19; The base stage of the 3rd triode T3 is connected with antenna L+ through the 18 resistance R 18, the 3rd capacitor C 3 successively; Described communication is answered circuit and is comprised the 16 resistance R 16, the second triode T2 and the 17 resistance R 17, the base stage of the second triode T2 is connected with the input/output end port RC5 of single-chip microcomputer U1 through the 16 resistance R 16, the emitter of the second triode T2 is connected to the ground and connects, and the collector of the second triode T2 is connected with antenna L+ through the 17 resistance R 17.Described communications reception circuit can be with host computer, the carrier communication signal that is formed by high level 24V and low level 16V that comes such as bus transfer such as fire alarm control units, the corresponding signal that is converted to high level 5V and low level 0V, and received and decoding by the input end RC0 of single-chip microcomputer U1; Single-chip microcomputer U1 is according to the communications command of host computer, answer circuit by communication again and answer the status informations such as the current fire alarm of detector, fault, normal monitoring to host computer, also can be according to information such as the sense cigarette analog quantity of the command transfer detector of host computer, type codes, setting address codes.
Described signal processing circuit is comprised of single-chip microcomputer and peripheral circuit thereof.Described single-chip microcomputer mainly comprises 10 scale-of-two A/D converters, timer, counter, 12 I/O pin, random memory ram, read/writable nonvolatile memory EEPROM, memory under program EPROM etc. that possess independent, direction control.10 scale-of-two A/D converters can with ADI 0.00V～4.70V voltage signal linear transformation is 0～1023 digital signal, 10 high resolution A/D converters provide hardware supported for slight change and many criterions of exploitation smoke detector algorithm process technology of identification smokescope.
To infrared light forward scattering and dim light characteristic and quantize the experimental study of rule, show: light scattering characteristic has stronger forward scattering effect for particle diameter larger white or grey smog based on typical smoke particle and non-smoke particle.As shown in Figure 1, forward-scattering angle ∠ COA is 123 °～139 ° higher to the larger light smog response sensitivity of particle diameter, and wherein ∠ COA gets 132 ± 3 ° for best; So detector of the present utility model is set as 132 ° with forward-scattering angle ∠ COA.And the dim light characteristic is to be stronger optical attenuation effect for the less black smog of particle diameter, and the larger and light-emitting area of luminotron and receiving tube spacing and sensitive surface Aligning degree are better, and then the response sensitivity to smog is higher; So, the weakening structure of detector of the present utility model is designed to: divide the upper left corner and the lower right corner that is located at sense cigarette labyrinth with the first infraluminescence pipe B and infrared receiving tube A, and with the base structural member the first infraluminescence pipe B and infrared receiving tube A are fixed on the diagonal angle straight line, namely ∠ BOA is set as 180 °.
Detector of the present utility model by programming development electronic code technology, the programmable bus communication technology and algorithm process technology, make detector of the present utility model with good cost performance, compatibility and reliable realization the functions such as intelligent decision fire, real-time information transmission.
The programmable bus communication technology: detector of the present utility model is supported any bus communication protocol with the mode of software programming, changes the detector hardware circuit by programming, need not and just can work with the fire alarm control unit of any producer is compatible.The detector programmable bus communication technology of the present utility model, solved in the past bus detector processed can only with fixedly producer, the fixedly fire alarm control unit auxiliary work of brand, fixed communication agreement, and problem that can not the wide area compatibility.
Bus detector electronic code processed technology: one of 1～255 address code can be set to detector by manual operation Lineside encoding unit (for the electronic code isolated plant of the supporting exploitation of detector of the present utility model), when the single-chip microcomputer in the detector is received the address setting order of Lineside encoding unit transmission, being about to this setting address code is kept among the single-chip microcomputer nonvolatile memory EEPROM, in detector and the fire alarm control unit networking operation, each detector receives in real time and compares by the address information of controller two bus transfer and with the setting address of this detector,, the address answers the current state information of this detector if judging unanimously to controller, if the address is judged inconsistent then do not answered.This electronic code bus communication technology can be save in the past bus detector processed need be with the hardware spending of 8 toggle switchs.
Claims (9)
1. box-like spot-type photoelectric smoke detector is recovered in a dim light and forward scattering, comprise the sense cigarette labyrinth that is formed by labyrinth lid and labyrinth base combination, it is characterized in that being provided with the first infraluminescence pipe, the second infraluminescence pipe and infrared receiving tube in inside, described sense cigarette labyrinth; Center, the angle ∠ COA between the infrared receiving tube in described the second infraluminescence pipe and sense cigarette labyrinth are 123 °～139 °, the center in described the first infraluminescence pipe and sense cigarette labyrinth, the angle ∠ BOA between the infrared receiving tube are 180 °, and described the first infraluminescence pipe, the second infraluminescence pipe are connected with control circuit respectively with infrared receiving tube.
2. box-like spot-type photoelectric smoke detector is recovered in a kind of dim light according to claim 1 and forward scattering, it is characterized in that center, the angle ∠ COA between the infrared receiving tube in described the second infraluminescence pipe and sense cigarette labyrinth is 129 °～135 °.
3. box-like spot-type photoelectric smoke detector is recovered in a kind of dim light according to claim 2 and forward scattering, it is characterized in that the center in described the second infraluminescence pipe and sense cigarette labyrinth, the angle ∠ COA between the infrared receiving tube are 132 °.
4. box-like spot-type photoelectric smoke detector is recovered in a kind of dim light according to claim 1 and forward scattering, it is characterized in that it is 10 that described labyrinth lid and labyrinth base adopt conductivity
8The conduction ABS raw material casting of S/cm forms.
5. box-like spot-type photoelectric smoke detector is recovered in a kind of dim light according to claim 1 and forward scattering, it is characterized in that described control circuit comprises signal processing circuit, telecommunication circuit, emission control circuit, the photosignal change-over circuit, signal amplifies and filtering circuit, fire alarm control unit and power circuit, signal processing circuit is connected with fire alarm control unit by telecommunication circuit, signal processing circuit is connected with emission control circuit, the output terminal of photosignal change-over circuit amplifies with signal and the input end of filtering circuit is connected, and signal amplifies and the output terminal of filtering circuit is connected with signal processing circuit; Power circuit amplifies with telecommunication circuit, emission control circuit, photosignal change-over circuit, signal processing circuit and signal respectively and filtering circuit is connected.
6. box-like spot-type photoelectric smoke detector is recovered in a kind of dim light according to claim 5 and forward scattering, it is characterized in that described emission control circuit comprises the first infraluminescence pipe, the second infraluminescence pipe, the 22 resistance, the 24 resistance, the positive pole of the first infraluminescence pipe and the second infraluminescence pipe is connected with the positive pole of power supply respectively, the negative pole of the second infraluminescence pipe is connected through the collector of the 22 resistance with the 4th triode, the emitter of the 4th triode is connected to the ground and connects, and the base stage of the 4th triode is connected with the control port of single-chip microcomputer through the 23 resistance; The negative pole of the first infraluminescence pipe is connected through the collector of the 24 resistance with the 5th triode, and the emitter of the 5th triode is connected to the ground and connects, and the base stage of the 5th triode is connected with the control port of single-chip microcomputer through the 8th resistance.
7. box-like spot-type photoelectric smoke detector is recovered in a kind of dim light according to claim 5 and forward scattering, it is characterized in that described photosignal change-over circuit comprises infrared receiving tube, the 9th resistance, the tenth resistance, the 6th electric capacity and the 7th electric capacity, the positive pole of power supply is connected with the negative pole of infrared receiving tube, the negative pole of the 7th electric capacity respectively through the 9th resistance; The positive pole of infrared receiving tube is connected to the ground through the tenth resistance and connects, and the positive pole of the 7th electric capacity is connected to the ground and connects, and is parallel with the 6th electric capacity at the two ends of the tenth resistance, and the positive pole of infrared receiving tube amplifies with signal and the input end of filtering circuit is connected.
8. box-like spot-type photoelectric smoke detector is recovered in a kind of dim light according to claim 5 and forward scattering, it is characterized in that described signal amplifies and filtering circuit comprises first order amplifier, second level amplifier, the positive input one tunnel of second level amplifier is connected through the output terminal of the 5th electric capacity with first order amplifier, another Lu Jingdi 13 resistance are connected to the ground and connect, the positive input of first order amplifier is the input end of signal amplification and filtering circuit, the reverse input end of first order amplifier is connected to the ground through the 11 resistance and connects, and is parallel with the 12 resistance and the 12 electric capacity between the reverse input end of first order amplifier and output terminal; The output terminal of second level amplifier is connected with the input end of single-chip microcomputer; The reverse input end of second level amplifier is connected to the ground through the 14 resistance and connects, and is parallel with the 15 resistance and the 13 electric capacity between the reverse input end of second level amplifier and output terminal.
9. box-like spot-type photoelectric smoke detector is recovered in a kind of dim light according to claim 5 and forward scattering, it is characterized in that described telecommunication circuit comprises communications reception circuit and the answer circuit of communicating by letter, described communications reception circuit comprises the 18 resistance, the 19 resistance, the 20 resistance, the 21 resistance, the 3rd electric capacity, the 4th electric capacity and the 3rd triode, the positive pole of power supply is connected through the collector of the 21 resistance with the 3rd triode, and the emitter of the 3rd triode is connected to the ground and connects; The collector of the 3rd triode is connected with the input/output end port of single-chip microcomputer, between the base stage of the positive pole of power supply and the 3rd triode, be connected with the 20 resistance, between the collector of the 3rd triode and emitter, be connected with the 4th electric capacity, between the base stage of the 3rd triode and emitter, be connected with the 19 resistance; The base stage of the 3rd triode is connected with antenna through the 18 resistance, the 3rd electric capacity successively; Described communication is answered circuit and is comprised the 16 resistance, the second triode and the 17 resistance, the base stage of the second triode is connected with the input/output end port of single-chip microcomputer through the 16 resistance, the emitter of the second triode is connected to the ground and connects, and the collector of the second triode is connected with antenna through the 17 resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220206838 CN202650184U (en) | 2012-05-09 | 2012-05-09 | Obscuration-forward scatter composite spot-type photoelectric smoke fire detector |
Applications Claiming Priority (1)
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| CN 201220206838 CN202650184U (en) | 2012-05-09 | 2012-05-09 | Obscuration-forward scatter composite spot-type photoelectric smoke fire detector |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103684297A (en) * | 2013-12-03 | 2014-03-26 | 成都国科海博信息技术股份有限公司 | Electric amplifying circuit used for detector |
| WO2021104148A1 (en) * | 2019-11-27 | 2021-06-03 | Xuedan Wu | Detection component, detection system and fire alarm for photoelectric smoke detection fire alarm |
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2012
- 2012-05-09 CN CN 201220206838 patent/CN202650184U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103684297A (en) * | 2013-12-03 | 2014-03-26 | 成都国科海博信息技术股份有限公司 | Electric amplifying circuit used for detector |
| WO2021104148A1 (en) * | 2019-11-27 | 2021-06-03 | Xuedan Wu | Detection component, detection system and fire alarm for photoelectric smoke detection fire alarm |
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Granted publication date: 20130102 Termination date: 20130509 |