CN221200517U - Photoelectric smoke detection device and equipment - Google Patents
Photoelectric smoke detection device and equipment Download PDFInfo
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- CN221200517U CN221200517U CN202323037958.1U CN202323037958U CN221200517U CN 221200517 U CN221200517 U CN 221200517U CN 202323037958 U CN202323037958 U CN 202323037958U CN 221200517 U CN221200517 U CN 221200517U
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- 239000000779 smoke Substances 0.000 title claims abstract description 79
- 238000001514 detection method Methods 0.000 title claims abstract description 53
- 238000005286 illumination Methods 0.000 claims abstract description 21
- 230000003287 optical effect Effects 0.000 claims abstract description 17
- 239000003990 capacitor Substances 0.000 claims description 10
- 230000035945 sensitivity Effects 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
Abstract
The application discloses a photoelectric smoke detection device and equipment. The photoelectric smoke detection device and equipment comprise a primary circuit, a secondary circuit and a primary circuit, wherein the primary circuit is used for generating an optical signal with preset illumination intensity; and the secondary side receiving circuit is arranged corresponding to the primary side circuit and is used for receiving the optical signal, detecting the illumination intensity of the received optical signal and giving an alarm when the illumination intensity reaches a preset threshold value. The photoelectric smoke detection device and the device provided by the embodiment of the application can continuously detect the smoke concentration, and timely alarm when the smoke concentration rises to the preset threshold value, so that the accuracy, the sensitivity and the usability of smoke detection are improved.
Description
Technical Field
The application relates to the technical field of fire safety, in particular to a photoelectric smoke detection device and equipment.
Background
With the rapid development of urban, dense and compact building structures, and popularization of electric power systems and fuel gas, hazard and occurrence probability of fire disaster are greatly improved, market demands of smoke alarms are expanded year by year, and rapidly-increased situations are presented, so that requirements on production and manufacturing efficiency and precision of the smoke alarms are higher and higher, and meanwhile, higher requirements on performance of smoke detection circuits are also provided.
The smoke detection circuit is a key point of the smoke alarm, when a fire disaster occurs, smoke passes through the smoke inlet seam to enter the maze, the smoke scatters infrared rays emitted by the infrared emission tube, the infrared rays are received by the receiving tube, and the maze converts optical signals into electric signals, so that the smoke detection function is completed.
At present, when some smoke detection circuits collect signals, as the signals sent by the primary side are in a pulse form, the signals received by the processor can be continuously changed in high and low levels, so that the signals are unstable, and therefore, the signal collection means has limitations, and the defects of data transmission speed, insufficient precision, performance and sensitivity of the smoke detection circuits or incapability of alarming in time can be caused, and even the occurrence of fire disaster can not be detected, so that potential safety hazards are caused; therefore, it is necessary to provide a smoke detection device with higher stability and sensitivity when the smoke detection circuit collects signals.
Disclosure of utility model
The embodiment of the application provides a photoelectric smoke detection device and equipment, which are used for improving stability and sensitivity when a smoke detection circuit collects signals.
In one aspect, an embodiment of the present application provides an optoelectronic smoke detection apparatus, including:
the primary circuit is used for generating a continuous optical signal with preset illumination intensity;
The secondary side receiving circuit is arranged corresponding to the primary side circuit and is used for receiving the continuous light signals generated by the primary side circuit, detecting the illumination intensity of the received light signals and giving an alarm when the illumination intensity reaches a preset threshold value.
In some embodiments of the application, the primary side circuit includes a power source and a light emitting diode connected to the power source to generate a continuous light signal of the predetermined illumination intensity.
In some embodiments of the present application, the driving mode of the led driving power supply is continuous driving.
In some embodiments of the present application, the primary side circuit further includes a first resistor, and the light emitting diode and the power supply are electrically connected to the first resistor, respectively.
In some embodiments of the application, the secondary side receiving circuit comprises a processor, a photodiode, and an integrating amplifier, the photodiode being connected to the processor through the integrating amplifier;
The position of the photodiode is correspondingly arranged with the light emitting diode so as to realize the receiving of the continuous optical signal generated by the primary circuit and the acquisition of the received data;
The processor is used for carrying out data processing on the received data and starting an alarm when the smoke concentration corresponding to the received data reaches a preset threshold value.
In some embodiments of the application, two ends of the photodiode are respectively connected to two input ends of the integrating amplifier, and an output end of the integrating amplifier is connected to an input end of the processor.
In some embodiments of the application, the processor is a DSP processor.
In some embodiments of the application, the secondary side receiving circuit further comprises a signal amplifying unit disposed between the photodiode and the processor.
In some embodiments of the present application, the signal amplifying unit includes a first capacitor and a second resistor, the second resistor is connected in parallel to two ends of the first capacitor, and the first capacitor is connected in parallel between an inverting input terminal and an output terminal of the integrating amplifier.
On the other hand, the application also provides photoelectric smoke detection equipment, which comprises any one of the photoelectric smoke detection devices.
According to the photoelectric smoke detection device and equipment provided by the embodiment of the application, the primary side circuit can generate continuous optical signals according to the preset illumination intensity, and the secondary side receiving circuit can not generate the problem of unstable signals caused by the change of pulse and high-low level when receiving the optical signals, so that the smoke concentration can be continuously detected, and the device and the equipment timely respond and alarm when the smoke concentration rises to the preset threshold value, thereby improving the accuracy, sensitivity and usability of smoke detection.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a primary side circuit and a secondary side receiving circuit in an embodiment of the application.
Fig. 2 is a schematic structural diagram of an electro-optical smoke detection device according to an embodiment of the present application.
Fig. 3 is a second schematic structural diagram of the photoelectric smoke detection device according to the embodiment of the present application.
Reference numerals
R1, a first resistor; r2, a second resistor; d1, a light emitting diode; d2, photodiode; c1, a first capacitor; u1, DSP processor; u2, an integrating amplifier; 1. a circuit board; 11. positioning holes; 2. a photoelectric maze.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.
The term "module" or "unit" as used herein may be considered a software object executing on the computing system. The various components, modules, engines, and services described herein may be viewed as implementing objects on the computing system. The apparatus and methods described herein are preferably implemented in software, but may of course also be implemented in hardware, all within the scope of the application.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. The term "and/or" as used herein includes all or any element and all combination of one or more of the associated listed items.
In the related art, the smoke detection circuit model is generally a circuit model in which an infrared emission tube is connected with a triode in series, and the power consumption is often reduced by using a mode of driving a processor to send pulse signals because the requirements on the power consumption are very strict; however, in the acquisition mode, the processor receives signals to continuously change the high level and the low level, so that the signals are unstable, and the defect of data transmission speed can exist, so that the alarm function can be realized only by improving the detection threshold value when the smoke concentration is higher, the alarm function can not be found in time in the early stage of fire occurrence, and a certain potential safety hazard exists.
Based on the above, the embodiment of the application provides a photoelectric smoke detection device and equipment.
Referring to fig. 1, the photoelectric smoke detection device includes a primary side circuit and a secondary side receiving circuit; the primary circuit is used for generating a continuous optical signal with preset illumination intensity; the secondary side receiving circuit is arranged corresponding to the primary side circuit and is used for receiving the continuous light signals generated by the primary side circuit, detecting the illumination intensity of the received light signals and giving an alarm when the illumination intensity reaches a preset threshold value.
According to the photoelectric smoke detection device, the primary circuit can generate continuous optical signals according to the preset illumination intensity, and when the secondary receiving circuit receives the optical signals, the problem that signals are unstable due to the change of pulses and high and low levels is avoided, so that the smoke concentration can be continuously detected, and when the smoke concentration rises to the preset threshold value, the smoke concentration responds in time and alarms, and the accuracy, the sensitivity and the usability of the smoke detection are improved.
The primary circuit is first described as follows:
In some embodiments, the primary circuit includes a power source and a light emitting diode D1, where the light emitting diode D1 is connected to the power source to generate a continuous light signal with a preset illumination intensity, and the light emitting diode D1 may be an infrared light emitting diode, where infrared light is invisible, so that the photoelectric smoke detection device is not visible light spots when in use, and can provide enough illumination for the secondary receiving circuit; in addition, the preset illumination intensity can be set based on different detection scenes or selected for purchase in the market according to other different use requirements; of course, the light emitting diode D1 may be a strong overcurrent light emitting diode, such as a high brightness light emitting diode, so as to have higher illumination intensity and be easier to transmit light signals.
In some embodiments, the driving mode of the driving power supply of the light emitting diode D1 may be continuous driving, for example, constant current mode is selected; as a voltage converter, the driving power supply of the light emitting diode D1 can be converted into specific voltage and current to drive the light emitting diode D1 to emit light, and when the continuous driving mode is selected, the power supply and current which are completely controlled and output by the primary side circuit can be realized, so that the current control precision is higher, fluctuation is not easy to occur, the illumination intensity and stability of the light emitting diode D1 are ensured as much as possible, and the secondary side receiving circuit only needs to receive an optical signal and output according to the optical signal, so that the photoelectric smoke detection device is more sensitive to smoke response.
In some embodiments, the primary circuit further includes a first resistor R1, the light emitting diode U1 and the power supply are electrically connected to the first resistor R1, and the first resistor R1 can protect the power supply and the light emitting diode D1, so as to limit phenomena such as breakdown and damage of the light emitting diode D1 caused by excessive current.
Next, the following describes a secondary side receiving circuit:
In some embodiments, the secondary side receiving circuit includes a processor U1, a photodiode D2, an integrating amplifier U2, the photodiode D2 being connected to the processor U1 through the integrating amplifier U2; the processor U1 is used for carrying out data processing on the received data and starting an alarm when the smoke concentration corresponding to the received data reaches a preset threshold value;
It should be noted that the position of the photodiode D2 is set corresponding to the light emitting diode D1, and receives the continuous optical signal generated by the primary circuit and acquires the received data; two ends of the photodiode D2 are respectively connected to two input ends of the integrating amplifier U2, and an output end of the integrating amplifier U2 is connected to an input end of the processor U1.
In some embodiments, the processor U1 may be a DSP processor or an MCU processor.
In one example, the processor U1 is a DSP processor, where the DSP processor performs data processing on the received data, and starts an alarm when the smoke concentration corresponding to the received data reaches a preset threshold, where the alarm may be implemented by electrically connecting an audible and visual alarm, for example, the audible and visual alarm is set to be a buzzer or an indicator light, and where the DSP processor is electrically connected to be the buzzer or the indicator light, and where the buzzer sounds by setting the sound level of the buzzer to be more than 80dB or other sound level with sufficient promptness, and where the buzzer blinks when the smoke concentration reaches the preset threshold.
In some embodiments, the secondary side receiving circuit further includes a signal amplifying unit, the signal amplifying unit is disposed between the photodiode D2 and the processor U1, the signal amplifying unit includes a first capacitor C1 and a second resistor R2, the second resistor R2 is connected in parallel to two ends of the first capacitor C1, and the first capacitor C1 is connected in parallel between the inverting input end of the integrating amplifier U2 and the output end thereof;
The signal amplification unit can perform anti-interference processing on the electric signal transmitted by the photodiode D2, and improves the sensitivity of the photoelectric smoke detection device to smoke detection.
Finally, in order to facilitate understanding of the arrangement positions of the primary side circuit and the secondary side receiving circuit, the structure of the photoelectric smoke detection device of the present application is further described:
In one embodiment, the photoelectric smoke detection device further comprises a bearing structure for installing and accommodating the primary side circuit and the secondary side receiving circuit, wherein the bearing structure comprises a shell and a smoke labyrinth arranged in the shell, the labyrinth can be communicated with the external environment through a smoke inlet, and the primary side circuit and the secondary side receiving circuit are arranged in the shell; in order to improve the adaptability and durability to fire, the shell and the labyrinth formed by the shell can be prepared from flame retardant materials.
The primary side circuit and the secondary side receiving circuit are arranged in the shell, the light emitting diode D1 and the photodiode D2 are arranged in the labyrinth, an infrared light signal is emitted through the light emitting diode D1, the photodiode D2 is correspondingly arranged with the light emitting diode D1, and the correlation angle is 135 degrees; when no smoke exists in the environment, the photodiode D2 cannot receive the infrared light signal emitted by the light-emitting diode D1, so that the subsequent secondary side receiving circuit has no electric signal change; when smoke exists in the environment, smoke particles enter the labyrinth through the smoke inlet, so that infrared light emitted by the emission tube is scattered; it should be noted that, the intensity of the scattered infrared light has a certain linear relation with the smoke concentration, and the smoke concentration threshold value can be set in advance according to the detection gradients of different photoelectric smoke detection devices.
Of course, other forms of carrying structures for accommodating the primary circuit and the secondary receiving circuit may be used, and a specific example of the carrying structures is described with reference to fig. 2-3, where the smoke detection device in the related art includes a housing, a circuit board 11 disposed in the housing, and a photoelectric labyrinth 22, the primary circuit and the secondary receiving circuit are disposed on the circuit board 11, the photoelectric labyrinth 22 is fixedly mounted on the circuit board 11 through a positioning hole 1111, a light emitting diode D1 in the primary circuit emits infrared light to generate an optical signal, a light emitting diode D13 emits light in the photoelectric labyrinth 22, and a photodiode D24 is used for receiving the light emitted by the light emitting diode D13 and scattered and reflected by smoke particles in the photoelectric labyrinth 22; when the light quantity received by the photodiode D24 in a period of time is smaller than the light quantity threshold value, the photodiode D2 transmits data to the DSP processor in the form of an electric signal, and the DSP processor judges that the fire disaster does not occur according to the received electric signal; conversely, when the light quantity received by the photodiode D24 in a period of time is greater than the light quantity threshold value, the DSP processor judges that the fire disaster occurs, and the alarm is started through the buzzer or the indicator light and other related alarm equipment.
In addition, the application also provides photoelectric smoke detection equipment, which comprises any embodiment of the photoelectric smoke detection device.
The above description of the photoelectric smoke detection device and the apparatus provided by the embodiments of the present application has been provided in detail, and specific examples are applied herein to illustrate the principles and embodiments of the present application, and the above description of the embodiments is only for helping to understand the method and the core idea of the present application; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, the present description should not be construed as limiting the present application.
Claims (10)
1. An electro-optical smoke detection apparatus, comprising:
the primary circuit is used for generating a continuous optical signal with preset illumination intensity;
The secondary side receiving circuit is arranged corresponding to the primary side circuit and is used for receiving the continuous light signals generated by the primary side circuit, detecting the illumination intensity of the received light signals and giving an alarm when the illumination intensity reaches a preset threshold value.
2. The photoelectric smoke detection apparatus according to claim 1, wherein said primary side circuit comprises a power source and a light emitting diode connected to said power source to generate a continuous light signal of said predetermined illumination intensity.
3. The photoelectric smoke detection apparatus according to claim 2, wherein the driving mode of the light emitting diode driving power supply is continuous driving.
4. The photoelectric smoke detection apparatus according to claim 3, wherein the primary side circuit further comprises a first resistor, and the light emitting diode and the power source are electrically connected to the first resistor, respectively.
5. The photoelectric smoke detection apparatus according to claim 2, wherein the secondary side receiving circuit includes a processor, a photodiode, an integrating amplifier, the photodiode being connected to the processor through the integrating amplifier;
The position of the photodiode is correspondingly arranged with the light emitting diode so as to realize the receiving of the continuous optical signal generated by the primary circuit and the acquisition of the received data;
The processor is used for carrying out data processing on the received data and starting an alarm when the smoke concentration corresponding to the received data reaches a preset threshold value.
6. The photoelectric smoke detection apparatus according to claim 5, wherein both ends of the photodiode are connected to both input ends of the integrating amplifier, respectively, and an output end of the integrating amplifier is connected to an input end of the processor.
7. The photoelectric smoke detection apparatus according to claim 6, wherein the processor is a DSP processor.
8. The photoelectric smoke detection apparatus according to any one of claims 5 to 7, wherein the secondary side receiving circuit further comprises a signal amplifying unit provided between the photodiode and the processor.
9. The photoelectric smoke detection apparatus according to claim 8, wherein the signal amplifying unit comprises a first capacitor and a second resistor, the second resistor is connected in parallel to both ends of the first capacitor, and the first capacitor is connected in parallel between an inverting input terminal and an output terminal of the integrating amplifier.
10. An electro-optical smoke detection apparatus comprising an electro-optical smoke detection device as claimed in any one of claims 1 to 9.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221200517U true CN221200517U (en) | 2024-06-21 |
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