CN205537980U - Infrared detection circuitry - Google Patents
Infrared detection circuitry Download PDFInfo
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- CN205537980U CN205537980U CN201620067858.4U CN201620067858U CN205537980U CN 205537980 U CN205537980 U CN 205537980U CN 201620067858 U CN201620067858 U CN 201620067858U CN 205537980 U CN205537980 U CN 205537980U
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- infrared
- voltage conversion
- conversion chip
- resistance
- electric capacity
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- Geophysics And Detection Of Objects (AREA)
Abstract
The utility model discloses an infrared detection circuitry, including infrared sensing module, signal processing module, alarm module and power module, infrared sensing module includes pyroelectric infrared sensor, signal processing module include with pyroelectric infrared sensor assorted infrared signal processing chip, two -way amplitude discriminator, bias current set up the port and can repeat the trigger control port, alarm module includes amplifier, warning circuit, delay output time control port and triggers and block the time control port, power module includes 12V -5V converting circuit and 5V -3.3V converting circuit. The utility model discloses simple structure, power module's project organization among the infrared detection circuitry has been optimized in the stable performance, has wholly improved infrared detection circuitry's life and result of use.
Description
Technical field
The utility model discloses a kind of infrared circuit, relate to electric and electronic technical field.
Background technology
Every object being present in nature, all can radiate infrared ray such as human body etc..Infrared ray sensor can detect object
The infrared ray launched, is used for measuring, imaging, reports to the police and control.Wherein pyroelectric infrared sensor is that one can detect people or dynamic
Thing launch infrared ray and export the sensor of the signal of telecommunication.It is widely used in producing the human detection of far infrared radiation, as reported to the police
Device, antitheft door, automatically-controlled door, the control etc. of non-attended light.
Infrared circuit detects when someone enters, and pyroelectric sensor detects that people launches infrared ray and output signal, thereafter
Passing to signal processor, by processing, Timing, output signal controls all kinds of warnings, automatically-controlled door, fan, automatically washes one's hands
The circuit such as pond, are particularly well-suited to automatic illuminating, control and warning system etc..
Infrared circuit of the prior art, due to the specific aim of application scenario, often has higher wanting to its power supply power pack
Ask, the complexity of circuit construction of electric power and the stability of use also have the space optimized further.
Utility model content
Technical problem to be solved in the utility model is: for the defect of prior art, it is provided that a kind of infrared circuit.
This utility model is for solving above-mentioned technical problem by the following technical solutions:
A kind of infrared circuit, including infrared sensing module, signal processing module, alarm module and power module, described electricity
The outfan of source module is connected with infrared sensing module, signal processing module, alarm module respectively, infrared sensing module defeated
Going out end to be connected with the input of signal processing module, the outfan of signal processing module is connected with the input of alarm module,
Wherein,
Described infrared sensing module includes pyroelectric infrared sensor；
Described signal processing module includes that the infrared signal matched with described pyroelectric infrared sensor processes chip, two-way amplitude discrimination
Device, bias current arrange port and repeatable trigger control end mouth；
Described alarm module includes that amplifier, warning circuit, delay output time control port and trigger blocking time control port；
Described power module includes 12V-5V change-over circuit and 5V-3.3V change-over circuit.
As further preferred scheme of the present utility model, the concrete electrical equipment of described power module includes the first voltage conversion core
Sheet, the second voltage conversion chip, diode, inductance, first to fourth resistance, first to fourth electric capacity, wherein, described
The model of one voltage conversion chip is LM2576, and the model of described second voltage conversion chip is AMS1117；
The voltage input end of 12V is connected with one end of the first electric capacity, the first pin of the first voltage conversion chip respectively, and first
The other end ground connection of electric capacity, the 4th pin of the first voltage conversion chip respectively with one end of inductance, one end of the second electric capacity,
One end of one resistance is connected, the other end of the first resistance and one end of the second resistance is connected and as the outfan of 5V voltage,
The other end of the second resistance respectively with the other end of the second electric capacity, the positive pole of diode, the 3rd pin of the first voltage conversion chip,
5th pin of the first voltage conversion chip is connected and ground connection, the second pin of the first voltage conversion chip another with inductance respectively
One end, the negative pole of diode are connected；
The outfan of described 5V voltage is connected with one end of the 3rd electric capacity, the 3rd pin of the second voltage conversion chip the most respectively,
The other end ground connection of the 3rd electric capacity, the first pin ground connection of the second voltage conversion chip, the second pin of the second voltage conversion chip
It is connected with one end, one end of the 3rd resistance of the 4th electric capacity respectively, the other end ground connection of the 4th electric capacity, another of the 3rd resistance
End is connected with one end of the 4th resistance and as the outfan of 3.3V voltage, the other end ground connection of the 4th resistance.
As further preferred scheme of the present utility model, described pyroelectric infrared sensor uses RE200B chip, according to temperature
Variation characteristic detection infra-red radiation, simultaneously with the Mutual suppression ambient temperature change interference of double sensitive unit.
As further preferred scheme of the present utility model, described infrared signal processes chip and includes that chip internal operational amplifier is inclined
Putting electric current and arrange port, described port is through 1M resistance eutral grounding.
This utility model uses above technical scheme compared with prior art, has following technical effect that simple in construction, and performance is steady
Fixed, optimize the design structure of power module in infrared circuit, be integrally improved the service life of infrared circuit and make
Use effect.
Accompanying drawing explanation
Fig. 1 is the construction module schematic diagram of infrared circuit；
Fig. 2 is the physical circuit schematic diagram of power module；
Wherein, U1 is the first voltage conversion chip, and U2 is the second voltage conversion chip, and D1 is diode, and L is inductance, R1
Being first to fourth resistance to R4, C1 to C4 is first to fourth electric capacity.
Detailed description of the invention
Of the present utility model embodiment is described below in detail, and the example of described embodiment is shown in the drawings, wherein certainly
Begin to same or similar label eventually represent same or similar element or there is the element of same or like function.Lead to below
It is exemplary for crossing the embodiment being described with reference to the drawings, and is only used for explaining this utility model, and can not be construed to this reality
With novel restriction.
Below in conjunction with the accompanying drawings the technical solution of the utility model is described in further detail:
Construction module schematic diagram of the present utility model is as it is shown in figure 1, described infrared circuit includes infrared sensing module, signal
Processing module, alarm module and power module, the outfan of described power module respectively with infrared sensing module, signal processing mould
Block, alarm module are connected, and the outfan of infrared sensing module is connected with the input of signal processing module, signal processing mould
The outfan of block is connected with the input of alarm module.Described infrared sensing module includes pyroelectric infrared sensor；Described letter
Number processing module includes that the infrared signal matched with described pyroelectric infrared sensor processes chip, two-way amplitude discriminator, biased electrical
Stream arranges port and repeatable trigger control end mouth；Described alarm module includes amplifier, warning circuit, delay output time control
Port processed and triggering blocking time control port；Described power module includes 12V-5V change-over circuit and 5V-3.3V change-over circuit.
The physical circuit schematic diagram of power module is as in figure 2 it is shown, 12V power supply is communicated to the defeated of U1 voltage conversion chip LM2576
Entering end 1 foot, input capacitance C1 is generally 100 μ F, accesses the input pin of LM2576, and after conversion, 2 feet are output as 5V electricity
Pressure, output capacitance C2 is generally 100 μ F, and inductance L is 100 μ H.The 5 foot incoming levels of LM2576 can be used for controlling LM2576
Duty, when input for low level time, LM2576 normally works；When input is for high level, LM2576 stops output also
Enter low power consumpting state.
5V output voltage is again through input 3 foot of U2 voltage conversion chip AMS1117, and input capacitance C3 is generally 10 μ F,
Accessing the input pin of LM2576,2 foot output 3.3V voltages, output capacitance C4 is generally 47 μ F.
Infrared sensing module: use pyroelectric infrared sensor, it mainly can detect infra-red radiation according to temperature variation characteristic, same
The Mutual suppression ambient temperature change interference of Shi Yushuan sensitive unit.Chip RE200B has three pins, a pin ground connection, and one is drawn
Foot connects 3.3V power supply, and the 3rd pin is sensor output voltage.In monitored area, if there being people to move, rpyroelectric infrared
The exportable voltage signal of sensor, delivers to signal processing module the infrared signal collected.
Signal processing module: use infrared signal to process chip, Signal Pretreatment can be carried out with sensor matching, by two-way
Amplitude discriminator suppresses interference, built-in reference voltage, operating voltage range width.Infrared signal processes chip power pin and meets 3.3V,
VSS end ground connection.
Infrared signal processes chip internal operational amplifier bias current and arranges end, through 1M resistance eutral grounding.Reference voltage and reset defeated
Enter to terminate 3.3V.
When repeatable trigger control end connects high level, it is allowed to repeated trigger, infrared signal processes the sustainable work of chip, processes red
The signal that outer sensor gathers.
Infrared signal processes the signal output part of chip and is connected with alarm module, when having people to move in detection region, and infrared sensor
Gathering signal and send infrared signal process chip to, infrared signal processes chip signal output and controls warning circuit, warning circuit warp
Amplify and control alarm.
Postponing output time and control termination potentiometer and electric capacity, control output delay time size, the time is the biggest, and sensor responds
The most insensitive.Triggering blocking time and control termination potentiometer and electric capacity, control to trigger blocking time size, the time is the biggest, sensing
Device response is the most insensitive.
Alarm module: this module processes chip with infrared signal and is connected, including amplifier and warning circuit.When detection region
Inside someone moves, and infrared sensor gathers signal and sends signal processing chip to, processes chip signal output and controls alarm module,
Alarm module amplified control alarm.
Power module: 12V power supply is communicated to input 1 foot of U1 voltage conversion chip LM2576, is output as 5V electricity after conversion
Pressure.5V output voltage, again through the input of U2 voltage conversion chip AMS1117, exports 3.3V voltage.
Above in conjunction with accompanying drawing, embodiment of the present utility model is explained in detail, but this utility model is not limited to above-mentioned reality
Execute mode, in the ken that those of ordinary skill in the art are possessed, it is also possible to before without departing from this utility model objective
Put and make a variety of changes.The above, be only preferred embodiment of the present utility model, not appoint this utility model
What pro forma restriction, although this utility model is disclosed above with preferred embodiment, but is not limited to this utility model,
Any those skilled in the art, in the range of without departing from technical solutions of the utility model, when the skill of available the disclosure above
Art content is made a little change or is modified to the Equivalent embodiments of equivalent variations, as long as being without departing from technical solutions of the utility model
Holding, according to technical spirit of the present utility model, within spirit of the present utility model and principle, that is made above example appoints
What simple amendment, equivalent and improvement etc., within all still falling within the protection domain of technical solutions of the utility model.
Claims (4)
1. an infrared circuit, it is characterised in that: include infrared sensing module, signal processing module, alarm module and power supply mould
Block, the outfan of described power module is connected with infrared sensing module, signal processing module, alarm module respectively, infrared biography
The outfan of sense module is connected with the input of signal processing module, the outfan of signal processing module and the input of alarm module
End is connected, wherein,
Described infrared sensing module includes pyroelectric infrared sensor；
Described signal processing module includes that the infrared signal matched with described pyroelectric infrared sensor processes chip, two-way amplitude discrimination
Device, bias current arrange port and repeatable trigger control end mouth；
Described alarm module includes that amplifier, warning circuit, delay output time control port and trigger blocking time control port；
Described power module includes 12V-5V change-over circuit and 5V-3.3V change-over circuit.
2. a kind of infrared circuit as claimed in claim 1, it is characterised in that: the concrete electrical equipment of described power module includes
First voltage conversion chip, the second voltage conversion chip, diode, inductance, first to fourth resistance, first to fourth electric capacity,
Wherein, the model of described first voltage conversion chip is LM2576, and the model of described second voltage conversion chip is AMS1117；
The voltage input end of 12V is connected with one end of the first electric capacity, the first pin of the first voltage conversion chip respectively, and first
The other end ground connection of electric capacity, the 4th pin of the first voltage conversion chip respectively with one end of inductance, one end of the second electric capacity,
One end of one resistance is connected, the other end of the first resistance and one end of the second resistance is connected and as the outfan of 5V voltage,
The other end of the second resistance respectively with the other end of the second electric capacity, the positive pole of diode, the 3rd pin of the first voltage conversion chip,
5th pin of the first voltage conversion chip is connected and ground connection, the second pin of the first voltage conversion chip another with inductance respectively
One end, the negative pole of diode are connected；
The outfan of described 5V voltage is connected with one end of the 3rd electric capacity, the 3rd pin of the second voltage conversion chip the most respectively,
The other end ground connection of the 3rd electric capacity, the first pin ground connection of the second voltage conversion chip, the second pin of the second voltage conversion chip
It is connected with one end, one end of the 3rd resistance of the 4th electric capacity respectively, the other end ground connection of the 4th electric capacity, another of the 3rd resistance
End is connected with one end of the 4th resistance and as the outfan of 3.3V voltage, the other end ground connection of the 4th resistance.
3. a kind of infrared circuit as claimed in claim 1, it is characterised in that: described pyroelectric infrared sensor uses RE200B
Chip, detects infra-red radiation according to temperature variation characteristic, simultaneously with the Mutual suppression ambient temperature change interference of double sensitive unit.
4. a kind of infrared circuit as claimed in claim 1, it is characterised in that: in described infrared signal process chip includes chip
Portion's operational amplifier bias current arranges port, and described port is through 1M resistance eutral grounding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620067858.4U CN205537980U (en) | 2016-01-22 | 2016-01-22 | Infrared detection circuitry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620067858.4U CN205537980U (en) | 2016-01-22 | 2016-01-22 | Infrared detection circuitry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205537980U true CN205537980U (en) | 2016-08-31 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620067858.4U Expired - Fee Related CN205537980U (en) | 2016-01-22 | 2016-01-22 | Infrared detection circuitry |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106525252A (en) * | 2016-12-29 | 2017-03-22 | 重庆奥海辉龙大数据有限公司 | Pyroelectric sensing circuit and signal conversion processing method |
| CN107664535A (en) * | 2017-11-03 | 2018-02-06 | 苏州华芯微电子股份有限公司 | Human body sensing chip for infrared thermal release electric |
| CN108319231A (en) * | 2017-12-24 | 2018-07-24 | 湛江正信科技服务有限公司 | Building monitoring system |
| CN108980920A (en) * | 2018-06-04 | 2018-12-11 | 广州市德弘五金制品有限公司 | A kind of electric ceramic heaters water boiling point detection system |
-
2016
- 2016-01-22 CN CN201620067858.4U patent/CN205537980U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106525252A (en) * | 2016-12-29 | 2017-03-22 | 重庆奥海辉龙大数据有限公司 | Pyroelectric sensing circuit and signal conversion processing method |
| CN107664535A (en) * | 2017-11-03 | 2018-02-06 | 苏州华芯微电子股份有限公司 | Human body sensing chip for infrared thermal release electric |
| CN108319231A (en) * | 2017-12-24 | 2018-07-24 | 湛江正信科技服务有限公司 | Building monitoring system |
| CN108980920A (en) * | 2018-06-04 | 2018-12-11 | 广州市德弘五金制品有限公司 | A kind of electric ceramic heaters water boiling point detection system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160831 Termination date: 20190122 |