CN208208052U - A kind of smoke sensor device and its control circuit - Google Patents
A kind of smoke sensor device and its control circuit Download PDFInfo
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- CN208208052U CN208208052U CN201820673411.0U CN201820673411U CN208208052U CN 208208052 U CN208208052 U CN 208208052U CN 201820673411 U CN201820673411 U CN 201820673411U CN 208208052 U CN208208052 U CN 208208052U
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Abstract
The utility model belongs to fire detection alarm technical field, provides a kind of smoke sensor device and its control circuit, is emitted by photoelectric sensing module and is scattered after encountering smoke particle after optical signal, and generates reception signal；The reception signal carries out logarithmic amplification after being compared with default electric signal, and exports analog signal；Finally convert analog signals into digital signal.It is thus achieved that can be to the effect that Smoking Seusitivity is classified by digital quantity calculation process, it is convenient simultaneously that reprocessing processing is carried out to measurement result, solving the existing control technology for smoke sensor device, there is since the dynamic range for receiving signal is too wide, lead to not the problem of carrying out classification to Smoking Seusitivity and carrying out reprocessing processing to measurement result.
Description
Technical field
The utility model belongs to fire detection alarm technical field more particularly to a kind of smoke sensor device and its control
Circuit.
Background technique
Currently, photoelectric smoke detection product is using when fire occurs, infrared light, which encounters fire hazard aerosol fog particle, to be occurred
This basic principle of the absorption and scattering process of light and it is manufactured.And the reception of existing infrared light and processing part are to use
The principle of linear operation amplification, when require the dynamic range for receiving signal must be very wide when, be limited by analog-digital converter and place
The limited operating voltage range of device is managed, linearly amplified signal will be unable to by digitized processing equal proportion.
Therefore, the existing control technology for smoke sensor device there is due to receive signal dynamic range it is too wide,
Lead to not the problem of carrying out being classified and measurement result can not being carried out reprocessing processing to Smoking Seusitivity.
Utility model content
The purpose of this utility model is to provide a kind of smoke sensor device and its control circuits, it is intended to solve existing be used for
The control technology of smoke sensor device there is due to receive signal dynamic range it is too wide, lead to not to Smoking Seusitivity carry out
The problem of being classified and reprocessing processing carried out to measurement result.
The utility model first aspect provides a kind of control circuit for smoke sensor device, the control circuit packet
It includes:
For emit encounter smoke particle after optical signal after scatter, and generate the photoelectric sensing module for receiving signal；
For issuing the reference source module of default electric signal；
With the photoelectric sensing module and it is described be connected with reference to source module, for the reception signal and described pre-
If electric signal carries out logarithmic amplification after being compared, and exports the logarithmic amplification module of analog signal；And
It is connected with the logarithmic amplification module, for being converted to the analog-to-digital conversion mould of digital signal to the analog signal
Block.
The utility model second aspect provides a kind of smoke sensor device, including power circuit and control circuit, the electricity
For being powered to the control circuit, the control circuit includes: source circuit
For emit encounter smoke particle after optical signal after scatter, and generate the photoelectric sensing module for receiving signal；
For issuing the reference source module of default electric signal；
With the photoelectric sensing module and it is described be connected with reference to source module, for the reception signal and described pre-
If electric signal carries out logarithmic amplification after being compared, and exports the logarithmic amplification module of analog signal；And
It is connected with the logarithmic amplification module, for being converted to the analog-to-digital conversion mould of digital signal to the analog signal
Block.
A kind of smoke sensor device provided by the utility model and its control circuit emit optical signal by photoelectric sensing module
After encounter smoke particle after scatter, and generate reception signal；The reception signal carries out after being compared with default electric signal
Logarithmic amplification, and export analog signal；Finally convert analog signals into digital signal.It is thus achieved that passing through digital quantity operation
Processing can carry out reprocessing processing to measurement result to the effect that Smoking Seusitivity is classified, while conveniently, solve existing
Some is used for the control technology of smoke sensor device there is since the dynamic range for receiving signal is too wide, leads to not to smog spirit
The problem of sensitivity carries out classification and carries out reprocessing processing to measurement result.
Detailed description of the invention
Fig. 1 is a kind of modular structure schematic diagram of control circuit for smoke sensor device provided by the utility model.
Fig. 2 is a kind of specific modular structure signal of control circuit for smoke sensor device provided by the utility model
Figure.
Fig. 3 is a kind of exemplary circuit figure of control circuit for smoke sensor device provided by the utility model.
Fig. 4 is reference source mould in a kind of control circuit for smoke sensor device of the utility model first embodiment offer
The exemplary circuit figure of block.
Fig. 5 is reference source mould in a kind of control circuit for smoke sensor device of the utility model second embodiment offer
The exemplary circuit figure of block.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
A kind of above-mentioned smoke sensor device and its control circuit, encounter smog after emitting optical signal by photoelectric sensing module
It is scattered after particle, and generates reception signal；The reception signal carries out logarithmic amplification after being compared with default electric signal, and
Export analog signal；Finally convert analog signals into digital signal.Specifically, the optical signal that transmitter issues, encounters smog
The scattering of light occurs after particle, scattering strength can generate huge variation with the difference of smokescope, this variable quantity
After very huge optical signal is received by the receiver, equal proportion is also generated into the very huge reception signal of a variable quantity；It will
The very huge reception signal of this variable quantity, can be by dynamic input range logarithmic amplification and by way of nonlinear amplification
Very wide reception signal matches linear dynamic output range after logarithmic amplification.Pass through this signal processing mode
Manufactured smoke sensor device, can be with the very wide tested smog of measurement dynamic range；It can be easily to smog spirit
Sensitivity is classified；The original very wide measurement result of dynamic range is quantized to range of linearity output simultaneously, convenient for number
Change equipment to handle the reprocessing of measurement result.
Fig. 1 shows a kind of modular structure of control circuit for smoke sensor device provided by the utility model, in order to
Convenient for explanation, only the parts related to this embodiment are shown, and details are as follows:
A kind of above-mentioned control circuit for smoke sensor device, the control circuit include photoelectric sensing module 102, reference source
Module 103, logarithmic amplification module 104 and analog-to-digital conversion module 105.
Photoelectric sensing module 101 for emit encounter smoke particle after optical signal after scatter, and generate reception signal.
With reference to source module 102 for issuing default electric signal.
Logarithmic amplification module 103 is connected with photoelectric sensing module 101 and with reference to source module 102, collects mail for docking
Number and default electric signal be compared after carry out logarithmic amplification, and export analog signal.
Analog-to-digital conversion module 104 is connected with logarithmic amplification module 103, for being converted to digital signal to analog signal.
As an embodiment of the present invention, above-mentioned reception signal can in optical dark room component smokescope it is significant
Difference, amplitude variation range will very huge (maximum value differ minimum value from about 105 times), this dynamic range is very wide
Signal is received after logarithmic amplification, is converted into the narrow output valve with the range of linearity, then will by digital-to-analogue conversion
This analog quantity carries out digital quantity, is transformed into the identifiable digital quantity of processor and carries out calculation process.
As an embodiment of the present invention, above-mentioned default electric signal includes reference current, and the reference current and reception are believed
The ratio of number (current signal) exports after logarithmic amplification.Reference current can be obtained by current source, can also be obtained by voltage source
It arrives.
Fig. 2 shows a kind of specific modular structure of the control circuit for smoke sensor device provided by the utility model,
For ease of description, only the parts related to this embodiment are shown, and details are as follows:
As an embodiment of the present invention, above-mentioned control circuit further includes control module 105, the control module 105 with
Photoelectric sensing module 101 is connected, for controlling the transmitting or shutdown of optical signal.
Fig. 3 shows a kind of exemplary circuit of control circuit for smoke sensor device provided by the utility model, in order to
Convenient for explanation, only the parts related to this embodiment are shown, and details are as follows:
As an embodiment of the present invention, above-mentioned photoelectric sensing module 101 includes that (Fig. 3 uses diode D1 to transmitter
Indicate), receiver (Fig. 3 using diode D2 expression), first switch tube Q1 and first resistor R1；
The input of transmitter terminates reference power source POWER, and the output of transmitter terminates the input terminal of first switch tube Q1, the
The first end of the output termination first resistor R1 of one switching tube Q1, the controlled termination control module 105 of first switch tube Q1, first
The second end of resistance R1 is grounded, and transmitter and receiver pairing use.
Specifically, first switch tube Q1 can be triode or field-effect tube；
Base stage, collector and the emitter of triode correspond respectively to the controlled end of first switch tube Q1, input terminal with
And output end；
Grid, drain electrode and the source electrode of field-effect tube correspond respectively to the controlled end of first switch tube Q1, input terminal and
Output end.
As an embodiment of the present invention, above-mentioned logarithmic amplification module 103 includes logarithm operational amplifier LOG, logarithm
The first input end of operational amplifier LOG connects photoelectric sensing module 101, the second input termination ginseng of logarithm operational amplifier LOG
Source module 102 is examined, the output of logarithm operational amplifier LOG terminates analog-to-digital conversion module 104.In the present embodiment, logarithm operation
Amplifier LOG use model TL441 logarithm operational amplifier, certainly, the model of logarithm operational amplifier without limitation, only
It wants to reach and also may be used with function described in the present embodiment logarithm operational amplifier LOG.
As an embodiment of the present invention, above-mentioned analog-to-digital conversion module 104 includes analog-digital converter ADC, analog-to-digital conversion
The output end of the input termination logafier LOG of device ADC.In the present embodiment, analog-digital converter ADC uses model
The analog-digital converter of AD7478, certainly, the model of analog-digital converter without limitation, as long as can reach and the present embodiment analog-to-digital conversion
Function described in device ADC also may be used.
Fig. 4 shows in a kind of control circuit for smoke sensor device that the utility model first embodiment provides and refers to
The exemplary circuit of source module, for ease of description, only the parts related to this embodiment are shown, and details are as follows:
It is above-mentioned to include current source, reference resistance Rref, second with reference to source module 102 as an embodiment of the present invention
Switching tube Q2, third switching tube Q3, current-limiting resistance Rs and zener diode D3；
The output end of current source connects altogether with the first end of reference resistance Rref and the anode of zener diode D3, benchmark electricity
The input terminal of the second termination third switching tube Q3 of Rref is hindered, the output of third switching tube Q3 terminates logarithmic amplification module 103, surely
The cathode of pressure diode D3 connects the input terminal of second switch Q2, the controlled end of second switch Q2, second switch Q2 it is defeated
The first end of outlet, the controlled end of third switching tube Q3 and current-limiting resistance Rs connects altogether, the second end ground connection of current-limiting resistance Rs.
Specifically, second switch Q2 can be triode or field-effect tube；
Base stage, collector and the emitter of triode correspond respectively to the controlled end of second switch Q2, input terminal with
And output end；
Grid, drain electrode and the source electrode of field-effect tube correspond respectively to the controlled end of second switch Q2, input terminal and
Output end.
Specifically, third switching tube Q3 can be triode or field-effect tube；
Base stage, collector and the emitter of triode correspond respectively to the controlled end of third switching tube Q3, input terminal with
And output end；
Grid, drain electrode and the source electrode of field-effect tube correspond respectively to the controlled end of third switching tube Q3, input terminal and
Output end.
Fig. 5 shows in a kind of control circuit for smoke sensor device that the utility model second embodiment provides and refers to
The exemplary circuit of source module, for ease of description, only the parts related to this embodiment are shown, and details are as follows:
It is above-mentioned to include voltage source, second resistance R2, third electricity with reference to source module 102 as an embodiment of the present invention
Hinder R3 and the 4th resistance R4；
The of the first end of the 4th resistance R4 of output termination of voltage source, the second end of the 4th resistance R4 and second resistance R2
The first end of one end and 3rd resistor R3 connect altogether, the second end ground connection of second resistance R2, the output termination pair of 3rd resistor R3
Number amplification module 103.
The utility model additionally provides a kind of smoke sensor device, including control circuit and for being powered to control circuit
Power circuit, the control circuit is as described above.
It is illustrated below in conjunction with working principle of Fig. 3-Fig. 5 to a kind of above-mentioned smoke sensor device and its control circuit:
Firstly, the anode of diode D1 connects reference power source POWER, cathode connects the current collection of first switch tube Q1 (triode)
Pole；The non-inverting output mouth PWM of processor is connected with the base stage of triode, the control signal of processor output pulse width modulation
The conducting of driving triode and by control the transmitting and shutdown of diode D1；The first electricity of emitter connection of triode
R1 is hindered, for limiting the total power consumption of transmit circuit.
Logarithm operational amplifier LOG can calculate the electric current of the reception signal of wide dynamic range and the ratio of reference current
Logarithm.The reception signal of wide dynamic range is converted into the current signal Is of wide dynamic range, the signal through photoelectric receiving tube
It is input into the first input end of logarithm operational amplifier LOG；It is input into reference to the reference current Iref that source module 102 generates
Second input terminal of logarithm amplifier, the ratio of the two current values export after logarithmic amplification；Logarithm amplifier amplifier LOG's is defeated
Outlet Vout meets analog-digital converter ADC, and the analog quantity of output is converted into digital quantity processing via digital analog converter ADC.
Photo-signal caused by the fire hazard aerosol fog that smoke sensor device has an impact human production life, that is, it is right
In 1nA to 100uA or so, variation range reaches the dynamic range of photo-signal received by number amplifier amplifier LOG
105 times.Assuming that the reference electric current of selection 1nA, then the signal, after logarithmic amplification, output is
Is=1nA, Vout=(1V) * LOG10 (Is/Iref)=LOG10 (1nA/1nA)=0V
Is=10nA, Vout=(1V) * LOG10 (Is/Iref)=LOG10 (10nA/1nA)=1V
Is=100nA, Vout=(1V) * LOG10 (Is/Iref)=LOG10 (1nA/1nA)=2V
Is=1uA, Vout=(1V) * LOG10 (Is/Iref)=LOG10 (1nA/1nA)=3V
Is=10uA, Vout=(1V) * LOG10 (Is/Iref)=LOG10 (1nA/1nA)=4V
Is=100uA, Vout=(1V) * LOG10 (Is/Iref)=LOG10 (1nA/1nA)=5V
By such transformation, the output that the reception signal of 1nA-100uA wide input range is converted into 0v-5v range is believed
Number, analog-digital converter ADC can be used to carry out quantification treatment.
The light receiving signal of wide dynamic range, can be easily to smog after logarithmic amplification is converted into linear convergent rate
The sensitivity of sensor is classified.For example, the reception signal of above-mentioned 1nA-100uA range is divided by 10 times every grade of relationship
Alarm threshold is arranged in 1nA-10nA, that is, output valve when needing highest grade of sensitivity for 5 grade of sensitivities
In the range of 0v-1v；When needing minimum grade of sensitivity, by alarm threshold setting in 10uA-100uA, that is, it is defeated
It is worth in the range of 4v-5v out, sensitivity setting of intermediate range and so on.
To sum up, a kind of smoke sensor device provided by the embodiment of the utility model and its control circuit, pass through photoelectric sensing mould
It is scattered after encountering smoke particle after block transmitting optical signal, and generates reception signal；The reception signal and default electric signal into
Logarithmic amplification is carried out after row, and exports analog signal；Finally convert analog signals into digital signal.It is thus achieved that logical
Measurement result can be carried out at reprocessing to the effect that Smoking Seusitivity is classified, while conveniently by crossing digital quantity calculation process
Reason solves the existing control technology for smoke sensor device there is since the dynamic range for receiving signal is too wide, causes
The problem of can not carrying out classification to Smoking Seusitivity and reprocessing processing is carried out to measurement result.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (10)
1. a kind of control circuit for smoke sensor device, which is characterized in that the control circuit includes:
For emit encounter smoke particle after optical signal after scatter, and generate the photoelectric sensing module for receiving signal；
For issuing the reference source module of default electric signal；
It is connected with the photoelectric sensing module and the source module that refers to, for the reception signal and the default electricity
Signal carries out logarithmic amplification after being compared, and exports the logarithmic amplification module of analog signal；And
It is connected with the logarithmic amplification module, for being converted to the analog-to-digital conversion module of digital signal to the analog signal.
2. control circuit as described in claim 1, which is characterized in that the control circuit further include:
It is connected with the photoelectric sensing module, the control module of transmitting or shutdown for controlling the optical signal.
3. control circuit as claimed in claim 2, which is characterized in that the photoelectric sensing module includes:
Transmitter, receiver, first switch tube and first resistor；
The input of the transmitter terminates reference power source, and the output of the transmitter terminates the input terminal of the first switch tube,
The output of the first switch tube terminates the first end of the first resistor, the controlled termination control of the first switch tube
Module, the second end ground connection of the first resistor, the transmitter and receiver pairing use.
4. control circuit as described in claim 1, which is characterized in that described to include: with reference to source module
Current source, reference resistance, second switch, third switching tube, current-limiting resistance and zener diode；
The output end of the current source connects altogether with the first end of the reference resistance and the anode of the zener diode, described
The input terminal of the second termination third switching tube of reference resistance, the output of the third switching tube terminate the logarithmic amplification
Module, the cathode of the zener diode connect the input terminal of the second switch, the controlled end of the second switch, described
The first end of the output end of second switch, the controlled end of the third switching tube and the current-limiting resistance connects altogether, the limit
The second end of leakage resistance is grounded.
5. control circuit as described in claim 1, which is characterized in that described to include: with reference to source module
Voltage source, second resistance, 3rd resistor and the 4th resistance；
The output of the voltage source terminates the first end of the 4th resistance, the second end of the 4th resistance and second electricity
The first end of the first end of resistance and the 3rd resistor connects altogether, the second end ground connection of the second resistance, the 3rd resistor
Output terminate the logarithmic amplification module.
6. a kind of smoke sensor device, including power circuit and control circuit, the power circuit be used for the control circuit into
Row power supply, which is characterized in that the control circuit includes:
For emit encounter smoke particle after optical signal after scatter, and generate the photoelectric sensing module for receiving signal；
For issuing the reference source module of default electric signal；
It is connected with the photoelectric sensing module and the source module that refers to, for the reception signal and the default electricity
Signal carries out logarithmic amplification after being compared, and exports the logarithmic amplification module of analog signal；And
It is connected with the logarithmic amplification module, for being converted to the analog-to-digital conversion module of digital signal to the analog signal.
7. smoke sensor device as claimed in claim 6, which is characterized in that the control circuit further include:
It is connected with the photoelectric sensing module, the control module of transmitting or shutdown for controlling the optical signal.
8. smoke sensor device as claimed in claim 7, which is characterized in that the photoelectric sensing module includes:
Transmitter, receiver, first switch tube and first resistor；
The input of the transmitter terminates reference power source, and the output of the transmitter terminates the input terminal of the first switch tube,
The output of the first switch tube terminates the first end of the first resistor, the controlled termination control of the first switch tube
Module, the second end ground connection of the first resistor, the transmitter and receiver pairing use.
9. smoke sensor device as claimed in claim 6, which is characterized in that described to include: with reference to source module
Current source, reference resistance, second switch, third switching tube, current-limiting resistance and zener diode；
The output end of the current source connects altogether with the first end of the reference resistance and the anode of the zener diode, described
The input terminal of the second termination third switching tube of reference resistance, the output of the third switching tube terminate the logarithmic amplification
Module, the cathode of the zener diode connect the input terminal of the second switch, the controlled end of the second switch, described
The first end of the output end of second switch, the controlled end of the third switching tube and the current-limiting resistance connects altogether, the limit
The second end of leakage resistance is grounded.
10. smoke sensor device as claimed in claim 6, which is characterized in that described to include: with reference to source module
Voltage source, second resistance, 3rd resistor and the 4th resistance；
The output of the voltage source terminates the first end of the 4th resistance, the second end of the 4th resistance and second electricity
The first end of the first end of resistance and the 3rd resistor connects altogether, the second end ground connection of the second resistance, the 3rd resistor
Output terminate the logarithmic amplification module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820673411.0U CN208208052U (en) | 2018-05-07 | 2018-05-07 | A kind of smoke sensor device and its control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820673411.0U CN208208052U (en) | 2018-05-07 | 2018-05-07 | A kind of smoke sensor device and its control circuit |
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| Publication Number | Publication Date |
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| CN208208052U true CN208208052U (en) | 2018-12-07 |
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| CN201820673411.0U Active CN208208052U (en) | 2018-05-07 | 2018-05-07 | A kind of smoke sensor device and its control circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113470300A (en) * | 2021-07-06 | 2021-10-01 | 无锡商业职业技术学院 | Photoelectric control system for high-precision smoke detector |
| CN117147399A (en) * | 2023-11-01 | 2023-12-01 | 成都派斯光科技有限公司 | Particulate matter concentration measuring device and method |
-
2018
- 2018-05-07 CN CN201820673411.0U patent/CN208208052U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113470300A (en) * | 2021-07-06 | 2021-10-01 | 无锡商业职业技术学院 | Photoelectric control system for high-precision smoke detector |
| CN113470300B (en) * | 2021-07-06 | 2022-12-20 | 无锡商业职业技术学院 | Photoelectric control system for high-precision smoke detector |
| CN117147399A (en) * | 2023-11-01 | 2023-12-01 | 成都派斯光科技有限公司 | Particulate matter concentration measuring device and method |
| CN117147399B (en) * | 2023-11-01 | 2024-01-26 | 成都派斯光科技有限公司 | Particulate matter concentration measuring device and method |
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Address after: 518000 East and fourth floors, building A1, xinjianxing science and Technology Industrial Park, Fengxin Road, Loucun, Gongming street, Guangming District, Shenzhen City, Guangdong Province Patentee after: TANDA Technology Co., Ltd. Address before: 518000 Guangdong province Shenzhen Guangming New District Gongming Street Village Feng Xin Lu Xinjian Xing Technology Industrial Park A1 Building 1 floor, 3 floor, 4 East Building, 5 floor Patentee before: TANDA Technology Co., Ltd. |
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