CN114062213A - Smoke detection sensor circuit and smoke sensor - Google Patents
Smoke detection sensor circuit and smoke sensor Download PDFInfo
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- CN114062213A CN114062213A CN202111505492.6A CN202111505492A CN114062213A CN 114062213 A CN114062213 A CN 114062213A CN 202111505492 A CN202111505492 A CN 202111505492A CN 114062213 A CN114062213 A CN 114062213A
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- 239000000779 smoke Substances 0.000 title claims abstract description 108
- 238000001514 detection method Methods 0.000 title claims abstract description 40
- 239000003990 capacitor Substances 0.000 claims description 9
- 238000005070 sampling Methods 0.000 claims description 9
- 238000005259 measurement Methods 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 5
- 230000004044 response Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/075—Investigating concentration of particle suspensions by optical means
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- Investigating Or Analysing Materials By Optical Means (AREA)
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Abstract
The invention relates to a smoke detection sensor circuit and a smoke sensor, wherein the smoke detection sensor circuit comprises: a transmitting circuit, a receiving circuit and a controller; the transmitting circuit comprises an infrared transmitting tube, and the infrared transmitting tube is used for transmitting infrared light; the receiving circuit comprises an infrared receiving tube, and the infrared receiving tube is used for receiving the infrared light emitted by the emitting circuit; the controller is respectively electrically connected with the transmitting circuit and the receiving circuit, controls the intensity of infrared light transmitted by the transmitting circuit by controlling the current flowing through the infrared transmitting tube, and determines the smoke concentration according to the intensity of the infrared light received by the receiving circuit; the smoke alarm control method solves the technical problems that in the prior art, the smoke dynamic measurement range is narrow and cannot be adjusted, and the range of the smoke alarm response threshold value is limited, increases the detection range of the smoke detector, and realizes the self-adaptive adjustment of the smoke detector dynamic measurement range.
Description
Technical Field
The invention relates to the technical field of smoke sensors, in particular to a smoke detection sensor circuit and a smoke sensor.
Background
The smoke concentration is usually detected by using the principle that light is scattered when encountering smoke particles. A common implementation is to use near infrared photodetection technology. When infrared light from the infrared emitter strikes a cloud of smoke particles, the light is diffusely reflected, which is enhanced as the concentration of smoke particles increases. The infrared light receiver receives the reflected light, and converts the light intensity analog signal into a discrete digital signal which can be identified and processed by the microprocessor through the photoelectric conversion circuit. The smoke detector can measure the concentration of the smoke by running an algorithmic analysis program in the microprocessor.
However, for the existing smoke detector, the smoke dynamic measurement range is narrow and cannot be adjusted, so that the range of the smoke alarm response threshold is limited, and the applicable scene of the smoke detector is limited; and the long-time use easily causes false alarm.
Disclosure of Invention
In view of the above, it is desirable to provide a smoke detection sensor circuit and a smoke sensor, which have a wide measurement range and are capable of adaptively adjusting the measurement range.
An embodiment of the present invention provides a smoke detection sensor circuit, including: a transmitting circuit, a receiving circuit and a controller;
the transmitting circuit comprises an infrared transmitting tube, and the infrared transmitting tube is used for transmitting infrared light;
the receiving circuit comprises an infrared receiving tube, and the infrared receiving tube is used for receiving the infrared light emitted by the emitting circuit;
the controller is respectively electrically connected with the transmitting circuit and the receiving circuit, controls the intensity of infrared light transmitted by the transmitting circuit by controlling the magnitude of current flowing through the infrared transmitting tube, and determines the smoke concentration according to the intensity of the infrared light received by the receiving circuit;
when the controller detects that the smoke concentration is greater than the maximum concentration, the current flowing through the infrared emission tube is controlled to be reduced to 1/N so as to increase the measuring range of the smoke detection sensor circuit, wherein N is greater than 1.
In one embodiment, the transmit circuit comprises: the analog-to-digital converter, the first operational amplifier and the switch module;
the input end of the analog-to-digital converter is electrically connected with the controller, and the output end of the analog-to-digital converter is electrically connected with the first operational amplifier and is used for converting an analog signal output by the controller into a digital signal and outputting the digital signal to the first operational amplifier;
a first input end of the first operational amplifier is electrically connected with an output end of the analog-to-digital converter, a second input end of the first operational amplifier is electrically connected with a second end of the switch module, and an output end of the first operational amplifier is electrically connected with a control end of the switch module;
the first end of the switch module is electrically connected with the infrared transmitting tube, and the second end of the switch module is grounded.
In one embodiment, the transmit circuit comprises: a load resistance;
the first end of the load resistor is electrically connected with the second end of the switch module and the second end of the first operational amplifier, and the second end of the load resistor is grounded.
In one embodiment, the receiving circuit includes: a second operational amplifier;
the first input end of the second operational amplifier is electrically connected with the first end of the infrared receiving tube, the second input end of the second operational amplifier is electrically connected with the second end of the infrared receiving tube, and the output end of the second operational amplifier is electrically connected with the controller;
the second operational amplifier sends detection voltage to the controller through the output end, and the controller determines the smoke concentration according to the detection voltage.
In one embodiment, a first end of the infrared emission tube is electrically connected to a power supply voltage, and a second end of the infrared emission tube is electrically connected to a first end of the switch module.
In one embodiment, the receiving circuit includes a sampling resistor;
the first end of the sampling resistor is electrically connected with the second end of the second operational amplifier, and the second end of the sampling resistor is grounded.
In one embodiment, the receiving circuit includes: a feedback resistor;
the first end of the feedback resistor is electrically connected with the second end of the second operational amplifier, and the second end of the feedback resistor is electrically connected with the output end of the second operational amplifier.
In one embodiment, the receiving circuit includes: a compensation capacitor;
the first end of the compensation capacitor is electrically connected with the second end of the second operational amplifier, and the second end of the compensation capacitor is electrically connected with the output end of the second operational amplifier.
In one embodiment, the infrared emitting tube is a light emitting diode and the infrared receiving tube is a photodiode.
Another embodiment of the invention provides a smoke sensor comprising the smoke detection sensor circuit of the above embodiment.
The invention provides a smoke detection sensor circuit and a smoke sensor, wherein the smoke detection sensor circuit comprises: a transmitting circuit, a receiving circuit and a controller; the transmitting circuit comprises an infrared transmitting tube, and the infrared transmitting tube is used for transmitting infrared light; the receiving circuit comprises an infrared receiving tube, and the infrared receiving tube is used for receiving the infrared light emitted by the emitting circuit; the controller is respectively electrically connected with the transmitting circuit and the receiving circuit, controls the intensity of infrared light transmitted by the transmitting circuit by controlling the current flowing through the infrared transmitting tube, and determines the smoke concentration according to the intensity of the infrared light received by the receiving circuit; when the controller detects that the smoke concentration is higher than the maximum concentration, the current flowing through the infrared receiving tube is controlled to be reduced to 1/N so as to increase the range of the smoke detection sensor circuit, wherein N is larger than 1; the smoke detector solves the technical problems that in the prior art, the smoke dynamic measurement range is narrow and cannot be adjusted, the range of a smoke alarm response threshold value is limited, and the applicable scene of the smoke detector is limited, increases the detection range of the smoke detector, realizes the self-adaptive adjustment of the dynamic measurement range of the smoke detector, and can automatically adjust the appropriate measurement range in real time according to the smoke concentration condition.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the conventional technologies, the drawings used in the description of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a smoke detection sensor circuit in accordance with one embodiment of the present invention;
FIG. 2 is a schematic diagram of a smoke detection sensor circuit in accordance with another embodiment of the present invention;
FIG. 3 is a schematic diagram of a transmit circuit in one embodiment of the invention;
fig. 4 is a schematic diagram of a receiving circuit according to an embodiment of the invention.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Embodiments of the invention are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. Further, "connection" in the following embodiments is understood to mean "electrical connection", "communication connection", or the like, if there is a transfer of electrical signals or data between the connected objects.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.
For the conventional smoke sensor, the measuring range and the maximum smoke concentration which can be detected are fixed and cannot be adjusted, so the conventional smoke sensor has the following problems:
1. the range of the alarm response threshold of the smoke sensor is limited by the fixed and unadjustable measuring range, and the applicable scene of the smoke sensor is limited;
2. the compensation space for the sensitivity drift of the smoke sensor caused by the environment (such as dust and aging of the device) is narrowed;
3. the narrower the sensitivity drift compensation space is, the shorter the normal use period of the smoke sensor is, and the more easily the smoke sensor is falsely reported when the smoke sensor is close to the end of a period;
4. the narrower the sensitivity drift compensation space is, the easier the smoke sensor reports a fault due to dust accumulation, manual cleaning is needed after the fault is reported, and the maintenance cost is high.
In order to solve the above problem, referring to fig. 1 and 2, the present invention provides a smoke detection sensor circuit, including: a transmitting circuit 100, a receiving circuit 200 and a controller 300.
The transmitting circuit 100 includes an infrared transmitting tube 110, and the infrared transmitting tube 110 is used to transmit infrared light.
The receiving circuit 200, the receiving circuit 200 includes an infrared receiving tube 210, and the infrared receiving tube 210 is used for receiving the infrared light emitted by the emitting circuit 110. Further, the infrared receiving tube 210 receives the infrared light emitted from the infrared emitting tube 110.
The controller 300 is electrically connected to the transmitting circuit 100 and the receiving circuit 200, respectively, and the controller 300 controls the intensity of the infrared light emitted from the transmitting circuit 100 by controlling the magnitude of the current flowing through the infrared transmitting tube 110, and determines the smoke concentration according to the intensity of the infrared light received by the receiving circuit 200.
When the controller 300 detects that the smoke concentration is higher than the maximum concentration, the current flowing through the infrared transmitting tube 110 is controlled to be reduced to 1/N, so as to increase the measuring range of the smoke detection sensor circuit, and N is higher than 1.
In the embodiment of the present invention, the controller 300 controls the intensity of the current flowing through the infrared transmitting tube 110 to control the intensity of the infrared light emitted by the infrared transmitting tube 110, and the infrared receiving tube 210 converts the received infrared light into an electrical signal, and converts the electrical signal into a digital signal that can be recognized by the controller 300 through the receiving circuit 200, and sends the digital signal to the controller 300. The controller 300 calculates the smoke concentration based on the control signal and performs feedback.
When the controller 300 detects that the smoke concentration is greater than the maximum concentration, the range of the smoke sensor cannot meet the current smoke detection work, and at this time, the range of the smoke sensor needs to be adjusted, so that the maximum smoke concentration which can be detected by the smoke sensor is increased to meet the current work requirement. The controller controls the current flowing through the infrared transmitting tube 110 to be reduced to 1/N, and at the same time, the electric signal fed back by the infrared receiving tube 210 is reduced to 1/N, so that the measuring range of the smoke sensor is changed to be N times of the original measuring range. For example, the range of the smoke sensor is 300-. By the mode, the range of the smoke sensor is automatically adjusted to be twice of the original range, and the range of the smoke sensor is increased.
In the embodiment of the present invention, referring to fig. 3, the transmitting circuit 100 includes: an analog-to-digital converter 120, a first operational amplifier 130, and a switching module 140.
The input end 121 of the analog-to-digital converter 120 is electrically connected to the controller 300, and the output end 122 of the analog-to-digital converter 120 is electrically connected to the first operational amplifier 130, for converting the analog signal output by the controller 300 into a digital signal and outputting the digital signal to the first operational amplifier 130.
The first input end 131 of the first operational amplifier 130 is electrically connected to the output end 122 of the analog-to-digital converter 120, the second input end 132 of the first operational amplifier 130 is electrically connected to the second end of the switch module 140, and the output end 133 of the first operational amplifier 140 is electrically connected to the control end of the switch module 140.
A first terminal of the switch module 140 is electrically connected to the ir transmitting tube 110, and a second terminal of the switch module 140 is grounded.
A first terminal of the infrared transmitting tube 110 is electrically connected to a power voltage, and a second terminal of the infrared transmitting tube 110 is electrically connected to a first terminal of the switch module 140.
Further, the transmission circuit 100 includes: a first end of the load resistor R1, a first end of the load resistor R1 is electrically connected to the second end of the switch module 140 and the second end 132 of the first operational amplifier 130, and a second end of the load resistor R1 is grounded.
In one embodiment, the controller 300 obtains the current flowing through the ir transmitting tube 110 by obtaining the current flowing through the load resistor R1, and controls the current flowing through the ir transmitting tube 110 through the analog-to-digital converter 120 and the first operational amplifier 130.
In the embodiment of the present invention, the controller 300 drives the infrared emission tube 110 with a constant current in a negative feedback manner through the analog-to-digital converter 120 and the first operational amplifier 130, and the controller 300 adjusts the output of the analog-to-digital converter 120 to change the equivalent current flowing through the infrared emission tube 110, so that the infrared emission tube 110 emits infrared light with different intensity levels. The infrared light irradiates on the smoke particles to generate scattering action, and is received by the infrared receiving tube 210 and converted into a digital signal which can be recognized by the controller 300 through the signal conditioning circuit.
For example, when the smoke concentration gradually increases, the digital signal received by the controller 300 also increases, and when the first full scale of the controller 300 is reached (i.e. when the initial scale is reached), the controller 300 reduces the amplitude of the output signal of the analog-to-digital converter 120 to the original 1/N, the infrared light emission intensity is also reduced to the original 1/N, and the amplitude of the output signal change of the infrared receiving tube 210 is also reduced to the original 1/N. This means that for the new second-order range (i.e. the expanded range), the output signal of the ir receiving tube 210 has a 1/N full-range variation range, and the dynamic measurement range of the smoke sensor is N times of the original first-order range.
In addition, the embodiment of the present invention normalizes the emission intensity of the discrete infrared emission tubes by negatively feeding back and adjusting the infrared emission current flowing through the infrared emission tubes by means of the analog-to-digital converter 120 and the first operational amplifier 130.
In one embodiment, referring to fig. 4, the receiving circuit 200 includes: a second operational amplifier 220, wherein a first input end 221 of the second operational amplifier 220 is electrically connected to the first end of the infrared receiving tube 210, a second input end 222 of the second operational amplifier 220 is electrically connected to the second end of the infrared receiving tube 210, and an output end 223 of the second operational amplifier 220 is electrically connected to the controller 300.
The second operational amplifier 220 sends a detection voltage to the controller 300 through the output 223, and the controller 300 determines the smoke concentration according to the detection voltage.
Further, the receiving circuit 200 includes a sampling resistor R3, a feedback resistor R2, and a compensation capacitor C.
The first terminal of the sampling resistor R3 is electrically connected to the second terminal 222 of the second operational amplifier 220, and the second terminal of the sampling resistor R3 is grounded.
A first terminal of the feedback resistor R2 is electrically connected to the second terminal 222 of the second operational amplifier 220, and a second terminal of the feedback resistor R2 is electrically connected to the output terminal 223 of the second operational amplifier 220.
A first terminal of the compensation capacitor C is electrically connected to the second terminal 222 of the second operational amplifier 220, and a second terminal of the compensation capacitor C is electrically connected to the output terminal 223 of the second operational amplifier 220.
It should be noted that, in the embodiment of the present invention, the infrared emission tube is a light emitting diode, and the infrared reception tube is a photodiode.
In summary, the smoke detection sensor circuit and the smoke sensor provided by the present invention include: a transmitting circuit, a receiving circuit and a controller; the transmitting circuit comprises an infrared transmitting tube, and the infrared transmitting tube is used for transmitting infrared light; the receiving circuit comprises an infrared receiving tube, and the infrared receiving tube is used for receiving the infrared light emitted by the emitting circuit; the controller is respectively electrically connected with the transmitting circuit and the receiving circuit, controls the intensity of infrared light transmitted by the transmitting circuit by controlling the current flowing through the infrared transmitting tube, and determines the smoke concentration according to the intensity of the infrared light received by the receiving circuit; when the controller detects that the smoke concentration is higher than the maximum concentration, the current flowing through the infrared receiving tube is controlled to be reduced to 1/N so as to increase the range of the smoke detection sensor circuit, wherein N is larger than 1; the smoke detector solves the technical problems that in the prior art, the smoke dynamic measurement range is narrow and cannot be adjusted, the range of a smoke alarm response threshold value is limited, and the applicable scene of the smoke detector is limited, increases the detection range of the smoke detector, realizes the self-adaptive adjustment of the dynamic measurement range of the smoke detector, and can automatically adjust the appropriate measurement range in real time according to the smoke concentration condition.
Another embodiment of the invention provides a smoke sensor comprising the smoke detection sensor circuit of the above embodiment.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in embodiments provided herein may include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A smoke detection sensor circuit, comprising: a transmitting circuit, a receiving circuit and a controller;
the transmitting circuit comprises an infrared transmitting tube, and the infrared transmitting tube is used for transmitting infrared light;
the receiving circuit comprises an infrared receiving tube, and the infrared receiving tube is used for receiving the infrared light emitted by the emitting circuit;
the controller is respectively electrically connected with the transmitting circuit and the receiving circuit, controls the intensity of infrared light transmitted by the transmitting circuit by controlling the magnitude of current flowing through the infrared transmitting tube, and determines the smoke concentration according to the intensity of the infrared light received by the receiving circuit;
when the controller detects that the smoke concentration is greater than the maximum concentration, the current flowing through the infrared emission tube is controlled to be reduced to 1/N so as to increase the measuring range of the smoke detection sensor circuit, wherein N is greater than 1.
2. The smoke detection sensor circuit of claim 1, wherein the transmit circuit comprises: the analog-to-digital converter, the first operational amplifier and the switch module;
the input end of the analog-to-digital converter is electrically connected with the controller, and the output end of the analog-to-digital converter is electrically connected with the first operational amplifier and is used for converting an analog signal output by the controller into a digital signal and outputting the digital signal to the first operational amplifier;
a first input end of the first operational amplifier is electrically connected with an output end of the analog-to-digital converter, a second input end of the first operational amplifier is electrically connected with a second end of the switch module, and an output end of the first operational amplifier is electrically connected with a control end of the switch module;
the first end of the switch module is electrically connected with the infrared transmitting tube, and the second end of the switch module is grounded.
3. The smoke detection sensor circuit of claim 2, wherein the transmit circuit comprises: a load resistance;
the first end of the load resistor is electrically connected with the second end of the switch module and the second end of the first operational amplifier, and the second end of the load resistor is grounded.
4. The smoke detection sensor circuit of claim 1, wherein the receiving circuit comprises: a second operational amplifier;
the first input end of the second operational amplifier is electrically connected with the first end of the infrared receiving tube, the second input end of the second operational amplifier is electrically connected with the second end of the infrared receiving tube, and the output end of the second operational amplifier is electrically connected with the controller;
the second operational amplifier sends detection voltage to the controller through the output end, and the controller determines the smoke concentration according to the detection voltage.
5. The smoke detection sensor circuit of claim 3, wherein a first end of the infrared emitting tube is electrically connected to a supply voltage and a second end of the infrared emitting tube is electrically connected to a first end of the switch module.
6. The smoke detection sensor circuit of claim 4, wherein the receiving circuit comprises a sampling resistor;
the first end of the sampling resistor is electrically connected with the second end of the second operational amplifier, and the second end of the sampling resistor is grounded.
7. The smoke detection sensor circuit of claim 4, wherein the receiving circuit comprises: a feedback resistor;
the first end of the feedback resistor is electrically connected with the second end of the second operational amplifier, and the second end of the feedback resistor is electrically connected with the output end of the second operational amplifier.
8. The smoke detection sensor circuit of claim 4, wherein the receiving circuit comprises: a compensation capacitor;
the first end of the compensation capacitor is electrically connected with the second end of the second operational amplifier, and the second end of the compensation capacitor is electrically connected with the output end of the second operational amplifier.
9. The smoke detection sensor circuit of claim 1, wherein said infrared emitting tube is a light emitting diode and said infrared receiving tube is a photodiode.
10. A smoke sensor, characterized in that it comprises a smoke detection sensor circuit according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111505492.6A CN114062213A (en) | 2021-12-10 | 2021-12-10 | Smoke detection sensor circuit and smoke sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111505492.6A CN114062213A (en) | 2021-12-10 | 2021-12-10 | Smoke detection sensor circuit and smoke sensor |
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| CN114062213A true CN114062213A (en) | 2022-02-18 |
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| CN202111505492.6A Pending CN114062213A (en) | 2021-12-10 | 2021-12-10 | Smoke detection sensor circuit and smoke sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115311835A (en) * | 2022-08-08 | 2022-11-08 | 无锡商业职业技术学院 | Multi-current scanning-based smoke detection method of photoelectric smoke detector |
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2021
- 2021-12-10 CN CN202111505492.6A patent/CN114062213A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115311835A (en) * | 2022-08-08 | 2022-11-08 | 无锡商业职业技术学院 | Multi-current scanning-based smoke detection method of photoelectric smoke detector |
| CN115311835B (en) * | 2022-08-08 | 2024-04-16 | 无锡商业职业技术学院 | Multi-current scanning-based smoke detection method of photoelectric smoke detector |
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