CN206893046U - Triangle polyester fibre warning device based on pyroelectric infrared sensor - Google Patents
Triangle polyester fibre warning device based on pyroelectric infrared sensor Download PDFInfo
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- CN206893046U CN206893046U CN201720853899.0U CN201720853899U CN206893046U CN 206893046 U CN206893046 U CN 206893046U CN 201720853899 U CN201720853899 U CN 201720853899U CN 206893046 U CN206893046 U CN 206893046U
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- infrared sensor
- warning device
- controller
- pyroelectric infrared
- resistance
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Abstract
The utility model discloses a kind of triangle polyester fibre warning device based on pyroelectric infrared sensor, warning device is installed on the floor levels top plate of staircase, including three rpyroelectric infrared signal acquisition modules, A/D converter, controller and alarm；Nearby whether someone or animal dis exist for three rpyroelectric infrared signal acquisition module detection doors, and result of detection is exported to A/D converter in the form of analog voltage signal, three analog voltage signals are converted into voltage digital signal and exported to controller by A/D converter, controller according to three voltage digital signals calculate human or animal height and human or animal to door distance, if highly exceed the threshold value of height, distance exceedes the threshold value of distance and the retention time of height and distance exceedes preset time, then it is considered that invader is performing unlocking action, control alarm sends alarm signal.The utility model can accurate judgement whether have invader, and the human or animal passed by once in a while then will not be misjudged.
Description
Technical field
Smart home field is the utility model is related to, more particularly to the triangle polyester fibre report based on pyroelectric infrared sensor
Alarm device.
Background technology
As science and technology and expanding economy, people are more and more stronger to the demand of house security.Propose in the prior art more
Kind of household reporting device, but the job stability of alarm and judge intelligent often not ideal enough, tend to produce wrong report
It is alert, bring inconvenience to life on the contrary.
Utility model content
Purpose of utility model：The purpose of this utility model be to provide one kind can accurate judgement whether have invader attempt beat
Open home safety door while the triangle polyester fibre warning device based on pyroelectric infrared sensor of false alarm will not be produced again.
Technical scheme：Triangle polyester fibre warning device described in the utility model based on pyroelectric infrared sensor, it is described
Warning device is installed on floor levels top plate in front of the door, including three rpyroelectric infrared signal acquisition modules, A/D converter,
Controller and alarm；Nearby whether someone or animal dis exist for three rpyroelectric infrared signal acquisition module detection doors, and will visit
Survey result is exported in the form of analog voltage signal to be converted into counting to A/D converter, A/D converter by three analog voltage signals
Word voltage signal is simultaneously exported to controller, and controller, which is converted three digital voltage signals by triangle polyester fibre principle, to be grown up or move
The height of thing and human or animal and control the work of alarm to the distance of door.
Further, in addition to Temperature Humidity Sensor；The temperature and humidity of Temperature Humidity Sensor detection environment is simultaneously exported to control
Device processed.
Further, the circuit structure of three rpyroelectric infrared signal acquisition modules is identical, including the double electricity of high impedance
Source operational amplifier OA1 and pyroelectric infrared sensor, high impedance dual power supply operational amplifier OA1 output end connection A/D turn
Parallel operation, high impedance dual power supply operational amplifier OA1 in-phase input end connection resistance R3 one end, resistance R3 other end connection
Electric capacity C1 one end, the electric capacity C1 other end connect resistance R4 one end and the output end of pyroelectric infrared sensor respectively, electricity
Hinder R4 other end ground connection, high impedance dual power supply operational amplifier OA1 inverting input connect respectively resistance R1 one end and
Resistance R2 one end, resistance R1 other end ground connection, resistance R2 other end connection high impedance dual power supply operational amplifier OA1's
Output end.
Further, the rpyroelectric infrared signal acquisition module also includes the focusing phenanthrene for being set in pyroelectric infrared sensor
Taper on Nie Er lens, the taper end of three rpyroelectric infrared signal acquisition modules focus on the lockhole of door lock
Position.
Further, the alarm includes buzzer and amplifying unit, and amplifying unit is used for the signal for exporting controller
Buzzer is given after amplification.
Beneficial effect：The utility model discloses a kind of triangle polyester fibre warning device based on pyroelectric infrared sensor,
By three rpyroelectric infrared signal acquisition modules, neighbouring human or animal is detected on the door, it is crucial that passing through controller
It can go out the height of human or animal according to the signal of change that three rpyroelectric infrared signal acquisition modules collect, and by environment temperature
Degree and the correction factor of humidity are multiplied by distance and height respectively, then compared with threshold value and preset time, so as to control alarm
Device sends alarm signal.Because if invader will open the door, certain time will necessarily be being stopped in certain distance in front of the door, passed through
Just whether energy accurate judgement has invader to the utility model, and the human or animal passed by once in a while then will not be misjudged.
Brief description of the drawings
Fig. 1 is the block diagram of the device of the utility model embodiment；
Fig. 2 is the circuit diagram of the device of the utility model embodiment；
Fig. 3 is the circuit diagram of the rpyroelectric infrared signal acquisition module of the utility model embodiment；
Fig. 4 is the schematic diagram of the taper of the utility model embodiment；
Fig. 5 is the scenario simulation figure of the utility model embodiment.
Embodiment
With reference to embodiment and accompanying drawing, the technical solution of the utility model is described further.
The main function of optical filter is only to allow infrared ray (infrared wave that human body send of the wavelength at 10 μm or so
It is long) by, and light, sunshine and other radiation are filtered, to suppress extraneous interference.
Infrared induction source is generally made up of two pyroelectricity elements in series or in parallel, the electricity of the two pyroelectricity elements
Pole on the contrary, ambient background radiation to two pyroelectricity elements almost have identical effect, make its caused pyroelectric effect phase
Mutually offset, output signal is close to zero.Once in someone's intrusion detection region, human infrared radiation is focused on by partial mirror,
And received by pyroelectricity element, because angle is different, the heat that two panels pyroelectricity element receives is different, and pyroelectricity energy is not yet
Together, it is impossible to be completely counterbalanced by.
Pyroelectric effect is similar with piezo-electric effect, refers to cause the phenomenon of plane of crystal electric charge due to the change of temperature.
Pyroelectric infrared sensor is made up of ceramic oxide or piezolectric crystal unit, is made electrode on two surfaces of element, is being sensed
When temperature has △ T change in device monitoring range, pyroelectric effect can produce electric charge △ Q on two electrodes, i.e., in two electrodes
Between produce a faint voltage △ V.Because its output impedance is high, there is a N-channel junction field in the sensor
Pipe carries out impedance conversion.Electric charge △ Q caused by pyroelectric effect can by the ion in air with reference to and disappear.When human body enters
Enter motionless after detection zone, when ambient temperature-stable is constant, sensor does not have signal output yet, and △ T=0, sensor is without output.
Normal body temperature is 37.5 degree of 36 ∽, its a length of 9.67 ∽ 9.64um of most strong infrared wave radiated, middle cardiac wave
A length of 9.65um.By Wien's displacement law：
Wavelength * temperature=b (constant)
The IR wavelength of the higher radiation of object temperature is shorter.Formula E=h ν wherein E according to Planck are energy, and v is
Frequency, h are Planck's constants：
ν λ=c
So E=hc/ λ, hence it is evident that wavelength X is smaller, and E is bigger.So human body temperature is higher, moves and make quick in detection zone
Sense member can cause the temperature change of itself also bigger because of the radiation in the external world, and pyroelectric effect can produce electricity on two electrodes
Lotus △ Q are bigger, higher by the outside output voltage of N-channel technotron change-over circuit.
And when human body is more remote from sensor, many components when infrared light is propagated in atmosphere in air will absorb infrared
Specific wavelength infrared ray can be greatly lost in line, particularly moisture, and as distance increases, energy is weaker, the electricity of sensor output
Press it is smaller, i.e., under specific environmental condition human body from a distance from sensor with sensor output voltage be into positive change.
Based on principles above, present embodiment discloses a kind of triangle polyester fibre report based on pyroelectric infrared sensor
Alarm device, warning device are installed in front of the door on staircase floor levels top plate, as shown in figure 1, believing including three rpyroelectric infrareds
Number acquisition module, A/D converter, controller and alarm.The working condition of controller includes learning state and normal detection shape
State, as shown in Fig. 2 two states are controlled by self-lock switch S1, learning state be used to setting preset time and height, away from
From the reference threshold of, temperature and humidity, the normal state that detects is used for detection door 4 nearby whether someone 6 or animal dis exists, and controls
The work of alarm.Nearby whether someone 6 or animal dis exist for three rpyroelectric infrared signal acquisition module detection doors 4, and will visit
Survey result is exported in the form of analog voltage signal is converted into electricity to A/D converter, A/D converter by three analog voltage signals
Pressure data signal is simultaneously exported to controller, controller by triangle polyester fibre principle by three digital voltage signals conversion adults 6 or
The height of animal and people 6 or animal and control the work of alarm to the distance of door 4.That is, if height exceedes height
The retention time of reference threshold and height and distance that reference threshold, distance exceed distance exceedes preset time, then it is assumed that
It is that invader is performing unlocking action, controls alarm to send alarm signal.The Temperature Humidity Sensor detection temperature of environment and wet
Spend and export to controller, controller is according to the relation between environment temperature and humidity and environment temperature and the reference threshold of humidity
Correction factor is calculated, the height and distance calculated is then multiplied by correction factor, if be multiplied by after correction factor
Reference threshold highly more than height, the distance being multiplied by after correction factor exceed the reference threshold and height and distance of distance
Retention time exceed preset time, then control alarm send alarm signal.Controller includes model
Stc12c5a60s2 single-chip microcomputer, A/D converter use 12 A/D converters of 300ksps/400ksps single supplies four-way, temperature
The model DHT11 of humidity sensor.
The circuit structure of three rpyroelectric infrared signal acquisition modules is identical, as shown in figure 3, including high impedance dual power supply
Operational amplifier OA1 and pyroelectric infrared sensor 3, high impedance dual power supply operational amplifier OA1 output end connection A/D conversions
Device, high impedance dual power supply operational amplifier OA1 in-phase input end connection resistance R3 one end, resistance R3 other end connection electricity
Hold C1 one end, the electric capacity C1 other end connects resistance R4 one end and the output end of pyroelectric infrared sensor 3, resistance respectively
R4 other end ground connection, high impedance dual power supply operational amplifier OA1 inverting input connect resistance R1 one end and electricity respectively
R2 one end is hindered, resistance R1 other end ground connection, resistance R2 other end connection high impedance dual power supply operational amplifier OA1's is defeated
Go out end.Taper 2, as shown in Figure 4 and Figure 5, three are also arranged with the focusing Fresnel Lenses 1 of pyroelectric infrared sensor 3
The end of taper 2 of individual rpyroelectric infrared signal acquisition module is directed to door lock 5.The electricity that pyroelectric infrared sensor 3 exports
Scope is pressed in+10-+20mV, after the amplification of high impedance dual power supply amplifier LF353 circuits, suppression common mode can effectively disturb, amplify
100 times of multiple, can may amplify the signal to 2V or so, adapt to follow-up A/D converter.
Alarm includes buzzer and amplifying unit, as shown in Fig. 2 amplifying unit includes triode and buzzer, three poles
Manage after the signal for controller to be exported amplifies and give buzzer.
Present embodiment also discloses a kind of triangle polyester fibre alarm method based on pyroelectric infrared sensor, including
Following steps：
S1：Door 4 nearby nobody 6 and during animal, control self-lock switch S1 so that controller is operated in learning state, to pre-
If the time is set, and will now detect obtained height, distance, temperature and humidity as height, distance, temperature and
The reference threshold of humidity；After setting finishes, self-lock switch S1 is controlled so that controller is operated in normal detection state；
S2：Nearby whether someone 6 or animal dis exist for three rpyroelectric infrared signal acquisition module detection doors 4, and will detection
As a result exported in the form of analog voltage signal and three analog voltage signals are converted into numeral to A/D converter, A/D converter
Voltage signal is simultaneously exported to controller；The temperature and humidity of Temperature Humidity Sensor detection environment is simultaneously exported to controller；
S3：Controller according to three digital voltage signals calculate people 6 or animal height and people 6 or animal to door 4
Distance, correction factor is calculated according to the relation between environment temperature and humidity and environment temperature and the reference threshold of humidity,
Then the height and distance calculated is multiplied by correction factor, if the height after being multiplied by correction factor exceedes the ginseng of height
Examine threshold value, be multiplied by correction factor after distance exceed the reference threshold of distance and retention time of height and distance exceedes
Preset time, then alarm is controlled to send alarm signal.
Claims (5)
1. the triangle polyester fibre warning device based on pyroelectric infrared sensor, it is characterised in that：The warning device is installed on door
On preceding floor levels top plate, including three rpyroelectric infrared signal acquisition modules, A/D converter, controller and alarm；Three
Nearby whether someone or animal dis exist individual rpyroelectric infrared signal acquisition module detection door, and result of detection is believed with analog voltage
Number form export to A/D converter, A/D converter by three analog voltage signals be converted into digital voltage signal and export to
Three digital voltage signals are converted into height and the people or dynamic of human or animal by triangle polyester fibre principle by controller, controller
Thing and controls the work of alarm to the distance of door.
2. the triangle polyester fibre warning device according to claim 1 based on pyroelectric infrared sensor, it is characterised in that：Also
Including Temperature Humidity Sensor；The temperature and humidity of Temperature Humidity Sensor detection environment is simultaneously exported to controller.
3. the triangle polyester fibre warning device according to claim 1 based on pyroelectric infrared sensor, it is characterised in that：Institute
It is identical to state the circuit structure of three rpyroelectric infrared signal acquisition modules, including high impedance dual power supply operational amplifier OA1 and
Pyroelectric infrared sensor, high impedance dual power supply operational amplifier OA1 output end connection A/D converter, high impedance dual power supply
Operational amplifier OA1 in-phase input end connection resistance R3 one end, resistance R3 other end connection electric capacity C1 one end, electric capacity
The C1 other end connects resistance R4 one end and the output end of pyroelectric infrared sensor respectively, and the resistance R4 other end is grounded,
High impedance dual power supply operational amplifier OA1 inverting input connects resistance R1 one end and resistance R2 one end, resistance respectively
R1 other end ground connection, resistance R2 other end connection high impedance dual power supply operational amplifier OA1 output end.
4. the triangle polyester fibre warning device according to claim 3 based on pyroelectric infrared sensor, it is characterised in that：Institute
State the taper focused on Fresnel Lenses that rpyroelectric infrared signal acquisition module also includes being set in pyroelectric infrared sensor
Sleeve pipe, the taper end of three rpyroelectric infrared signal acquisition modules focus on the lockhole position of door lock.
5. the triangle polyester fibre warning device according to claim 1 based on pyroelectric infrared sensor, it is characterised in that：Institute
Stating alarm includes buzzer and amplifying unit, and amplifying unit gives buzzer after being used for the signal amplification by controller output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720853899.0U CN206893046U (en) | 2017-07-14 | 2017-07-14 | Triangle polyester fibre warning device based on pyroelectric infrared sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720853899.0U CN206893046U (en) | 2017-07-14 | 2017-07-14 | Triangle polyester fibre warning device based on pyroelectric infrared sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206893046U true CN206893046U (en) | 2018-01-16 |
Family
ID=61296397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720853899.0U Expired - Fee Related CN206893046U (en) | 2017-07-14 | 2017-07-14 | Triangle polyester fibre warning device based on pyroelectric infrared sensor |
Country Status (1)
| Country | Link |
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| CN (1) | CN206893046U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114136457A (en) * | 2021-11-03 | 2022-03-04 | 中国安全生产科学研究院 | Infrared detection driver uniform correction and noise control based on FPGA |
| CN114384813A (en) * | 2021-11-30 | 2022-04-22 | 重庆电子工程职业学院 | Early warning prompt system of intelligent home |
-
2017
- 2017-07-14 CN CN201720853899.0U patent/CN206893046U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114136457A (en) * | 2021-11-03 | 2022-03-04 | 中国安全生产科学研究院 | Infrared detection driver uniform correction and noise control based on FPGA |
| CN114384813A (en) * | 2021-11-30 | 2022-04-22 | 重庆电子工程职业学院 | Early warning prompt system of intelligent home |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180116 Termination date: 20180714 |
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| CF01 | Termination of patent right due to non-payment of annual fee |