CN111835324A - Active scanning pyroelectric infrared induction switch - Google Patents
Active scanning pyroelectric infrared induction switch Download PDFInfo
- Publication number
- CN111835324A CN111835324A CN201910301327.5A CN201910301327A CN111835324A CN 111835324 A CN111835324 A CN 111835324A CN 201910301327 A CN201910301327 A CN 201910301327A CN 111835324 A CN111835324 A CN 111835324A
- Authority
- CN
- China
- Prior art keywords
- infrared
- pyroelectric infrared
- modulation device
- infrared sensor
- pyroelectric
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000006698 induction Effects 0.000 title claims abstract description 21
- 230000033001 locomotion Effects 0.000 claims abstract description 12
- 230000001939 inductive effect Effects 0.000 claims description 12
- 238000010586 diagram Methods 0.000 description 11
- 230000003068 static effect Effects 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/28—Modifications for introducing a time delay before switching
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/941—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated using an optical detector
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/945—Proximity switches
Abstract
The pyroelectric infrared sensing switch comprises a pyroelectric infrared sensor, wherein an infrared chopping modulation device is arranged in front of the pyroelectric infrared sensor, a plurality of windows are arranged on the infrared chopping modulation device, the infrared chopping modulation device is connected with a driving mechanism, the pyroelectric infrared sensor corresponds to the windows, and sends signals to the driving mechanism after sensing infrared signals through the windows, and the driving mechanism drives the infrared chopping modulation device to move. Set up an infrared chopper modulation device in front of pyroelectric infrared sensor, sense infrared signal back when pyroelectric infrared sensor, infrared chopper modulation device begins to move, through infrared chopper modulation device's motion, cuts off external infrared signal often, and sense external infrared signal in time to make pyroelectric infrared induction switch can continuously work, even if the human body that gets into pyroelectric infrared sensor induction range is in quiescent condition.
Description
Technical Field
The invention relates to a pyroelectric infrared induction switch, in particular to an active scanning pyroelectric infrared induction switch.
Background
The pyroelectric infrared sensing switch is an automatic control switch based on an infrared sensing technology, the pyroelectric infrared sensor senses infrared heat of a human body to realize an automatic control function, various electrical equipment such as lamps, automatic doors and burglar alarms can be quickly opened, and great convenience is brought to daily work and life of people.
However, due to the physical characteristics of the pyroelectric infrared sensor and the design technology of the existing product, the existing infrared inductive switch has certain defects in use. When the infrared inductive switch passively induces the moving heat of the human body, only one time delay circuit is set in the circuit processing to keep the infrared inductive switch in a certain working time. When a human body is still in front of the pyroelectric infrared sensor, the delayed infrared sensing switch stops working and cannot keep long-time working when the human body is still, so that great inconvenience is brought in actual application, for example, certain false judgment and false alarm can be caused in anti-theft alarm.
Disclosure of Invention
In order to solve the defects of the prior art, the invention aims to provide an active scanning pyroelectric infrared induction switch, which performs infrared chopping modulation on human body infrared heat existing in an induction range, realizes active scanning on the human body infrared heat, and ensures that the pyroelectric infrared induction switch can work for a long time until a human body leaves the induction range of the pyroelectric infrared sensor.
In order to achieve the purpose, the active scanning pyroelectric infrared induction switch comprises a pyroelectric infrared sensor, wherein an infrared chopping modulation device is arranged in front of the pyroelectric infrared sensor, a plurality of windows are arranged on the infrared chopping modulation device, the infrared chopping modulation device is connected with a driving mechanism, the pyroelectric infrared sensor corresponds to the windows, the pyroelectric infrared sensor sends signals to the driving mechanism after sensing infrared signals through the windows, and the driving mechanism drives the infrared chopping modulation device to move.
Preferably, the infrared chopping modulation device is a plate body, a plurality of windows are arranged on the plate body, centers of the windows are located on the same straight line, and the driving mechanism drives the plate body to do linear reciprocating movement relative to the pyroelectric infrared sensor.
Preferably, the infrared chopping modulation device is a plate body, a plurality of windows are arranged on the plate body, the centers of the windows are located on the same circumference, and the driving mechanism drives the plate body to rotate relative to the pyroelectric infrared sensor.
Preferably, the pyroelectric infrared sensor is opposite to the movement track of the center of the window, and the pyroelectric infrared inductive switch further comprises a positioning mechanism which can drive the infrared chopping modulation device to move until the pyroelectric infrared sensor is opposite to the center of the window.
Preferably, the positioning mechanism includes a transmitter, a perforation and a receiver, the transmitter and the receiver are respectively located on the front side and the rear side of the infrared chopping modulation device, at least one perforation is formed in the infrared chopping modulation device, the perforation corresponds to the window, after a medium transmitted by the transmitter passes through the perforation and is received by the receiver, the receiver does not send a signal to the driving mechanism, the medium transmitted by the transmitter is blocked by the infrared chopping modulation device, when the receiver cannot receive the medium, the receiver sends a signal to the driving mechanism, and the driving mechanism drives the infrared chopping modulation device to move.
Preferably, the centre line of the window coincides with the centre line of the perforation corresponding thereto.
Preferably, the number of perforations is equal to or less than the number of windows.
Preferably, the driving mechanism is a stepping motor.
Preferably, the pyroelectric infrared sensor and the infrared modulation device are positioned in the same lens.
Compared with the prior art, the invention has the beneficial effects that: set up an infrared chopper modulation device in front of the pyroelectric infrared sensor, after pyroelectric infrared sensor sensed human infrared signal, infrared chopper modulation device began to move, and the motion through infrared chopper modulation device carries out the chopper modulation to human infrared heat, makes pyroelectric infrared sensor can sense pulsive human infrared signal through the window, thereby makes pyroelectric infrared induction switch can continuously work, even if the human body that gets into pyroelectric infrared sensor sensing range is in static or unmovable state.
Drawings
FIG. 1 is a schematic structural view of example 1.
FIG. 2 is a schematic structural view of example 2.
Fig. 3 is a schematic structural diagram of an infrared chopper modulation device and a pyroelectric infrared sensor in embodiment 3.
Fig. 4 is a schematic structural diagram of the positioning mechanism and the infrared chopper modulation device in fig. 3.
Fig. 5 is another schematic structural diagram of an infrared chopper modulation device and a pyroelectric infrared sensor in embodiment 3.
Fig. 6 is a schematic structural diagram of the positioning mechanism and the infrared chopper modulation device in fig. 5.
Fig. 7 is a schematic structural view of an infrared chopper modulation device and a pyroelectric infrared sensor in embodiment 4.
Fig. 8 is a schematic structural diagram of the positioning mechanism and the infrared chopper modulation device in fig. 7.
Fig. 9 is a schematic structural view of an infrared chopper modulation device and a pyroelectric infrared sensor in embodiment 4.
Fig. 10 is a schematic structural diagram of the positioning mechanism and the infrared chopper modulation device in fig. 9.
FIG. 11 is a schematic circuit diagram of a pyroelectric infrared sensor according to the present invention.
Fig. 12 is a schematic circuit diagram of an infrared chopper modulation apparatus and a drive mechanism according to the present invention.
Fig. 13 is another circuit schematic diagram of the infrared chopper modulation apparatus and the drive mechanism of the present invention.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
Example 1:
as shown in fig. 1, an active scanning pyroelectric infrared sensing switch comprises a pyroelectric infrared sensor 1 and a lens, wherein an infrared chopping modulation device is arranged between the pyroelectric infrared sensor 1 and the lens, the infrared chopping modulation device is positioned in front of the pyroelectric infrared sensor 1, the infrared chopping modulation device is a plate body, in this embodiment, the plate body is a square plate 2, a plurality of uniformly distributed windows 3 are arranged on the square plate 2, the centers of the windows 3 are positioned on the same straight line, the sizes of the windows 3 are equal, the pyroelectric infrared sensor 1 corresponds to the windows 3, the square plate 2 is connected with a driving mechanism, and the driving mechanism can drive the square plate 2 to do left and right linear reciprocating movement.
In an initial state, the pyroelectric infrared sensor 1 is opposite to one window, when a human body enters the sensing range of the pyroelectric infrared sensor 1, the pyroelectric infrared sensor 1 senses an infrared signal through the window 3, the pyroelectric infrared sensor 1 sends an electric signal to the driving mechanism, the driving mechanism drives the square plate 2 to do left-right linear reciprocating movement, meanwhile, the pyroelectric infrared sensing switch sends the electric signal to the load, the load starts to work, in the moving process, the pyroelectric infrared sensor 1 continues to sense the infrared signal when passing through the next window, the pyroelectric infrared sensor 1 continues to send the electric signal to the driving mechanism, the driving mechanism continues to drive the square plate 2 to keep moving, and even if the human body is still in the sensing range of the pyroelectric infrared sensor 1, the work of the pyroelectric infrared sensing switch cannot be influenced, if when infrared signal can't be sensed when pyroelectric infrared sensor 1 passes through next window, pyroelectric infrared sensor 1 does not send a signal to actuating mechanism, actuating mechanism stop work, and square board 2 no longer removes, and at this moment, pyroelectric infrared sensor 1 is relative with this window, waits for next infrared signal.
For better control of the movement of the infrared chopper modulation device, the drive mechanism is preferably a stepper motor. In general, the pyroelectric infrared sensor sends a signal to the stepping motor, a step angle realized by the stepping motor within a delay time is at least equal to the distance between adjacent windows, and a corresponding step angle of the stepping motor within a delay time is designed according to actual conditions.
The pyroelectric infrared sensor is characterized in that an infrared chopping modulation device is arranged in front of the pyroelectric infrared sensor 1, the infrared chopping modulation device can move relative to the pyroelectric infrared sensor, infrared signals of a human body are cut through the movement of the infrared chopping modulation device, active scanning of the pyroelectric infrared sensor on the infrared signals of the external human body is achieved, the infrared signals of the human body are not simply and passively sensed, namely, the pyroelectric infrared sensor receives pulsating human body infrared signals, the problem that the human body is still in the sensing range of the pyroelectric infrared sensor to close the pyroelectric infrared sensing switch is solved, and when the pyroelectric infrared sensing switch is connected with other loads such as a lighting lamp, an automatic door, an anti-theft alarm and the like, misoperation can be reduced.
Example 2:
as shown in fig. 2, the present embodiment is different from embodiment 1 in that: the plate body is a disc 4, a plurality of windows 3 are arranged on the disc 4, the centers of the windows 3 are located on the same circumferential line, the windows 3 are evenly distributed on the same circumferential line, the windows 3 are equal in size, a driving shaft of the driving mechanism is connected with the circle center of the disc 4, and the driving mechanism drives the disc 4 to rotate.
In the initial state, the pyroelectric infrared sensor 1 is also opposite to one of the windows, after sensing the infrared signal of a human body, the pyroelectric infrared sensor 1 sends an electric signal to the driving mechanism, the driving mechanism drives the disc 4 to rotate, and the infrared signal is actively cut through the windows 3 on the disc 4, so that the pyroelectric infrared sensor 1 actively scans the sensing range of the pyroelectric infrared sensor 1, and the whole operation process is the same as that of embodiment 1 and is not repeated herein.
Example 3:
as shown in fig. 3, 4, 5 and 6, the present embodiment is different from embodiment 1 in that: the pyroelectric infrared induction switch in the embodiment further comprises a positioning mechanism, and the positioning mechanism can drive the infrared chopping modulation device to move until the pyroelectric infrared sensor 1 is opposite to the center of the window 3.
The area of the window 3 is generally larger than that of the pyroelectric infrared sensor 1, when the pyroelectric infrared sensor 1 in embodiment 1 is opposite to the window 3 and does not receive an infrared signal, the signal transmission to the load and driving mechanism is stopped, when the next human body infrared signal enters, the pyroelectric infrared sensor is blocked by the infrared chopping modulation device, so that the sensing range of the pyroelectric infrared sensor is influenced, and therefore the normal operation of the pyroelectric infrared sensing switch is influenced, in order to ensure that the sensing range of the pyroelectric infrared sensor 1 is not blocked by the window 3, the movement tracks of the pyroelectric infrared sensor 1 and the center of the window 3 are opposite, and through the positioning mechanism, the pyroelectric infrared sensor 1 and the center of the window 3 are opposite after the infrared chopping modulation device moves each time.
The specific structure of the positioning mechanism is as follows: the positioning mechanism comprises a transmitter 5, a through hole 6 and a receiver 7, wherein the transmitter 5 and the receiver 7 are respectively positioned on the front side and the rear side of the infrared chopping modulation device, in the embodiment, the transmitter 5 is a light emitting tube, the receiver 7 is a photosensitive tube, at least one through hole 6 is formed in the square plate 2, the through hole 6 corresponds to the window 3, after light beams emitted by the transmitter 5 pass through the through hole 6 and are received by the receiver 7, the receiver 7 does not send electric signals to the driving mechanism, the light beams emitted by the transmitter 5 are blocked by the square plate, when the receiver 7 cannot receive the light beams, the receiver 7 sends the electric signals to the driving mechanism, and the driving mechanism drives the square plate 2 to move.
The number of the through holes 6 is less than or equal to the number of the windows 3, as shown in fig. 3 and 4, the number of the through holes is equal to the number of the windows 3, that is, the through holes correspond to the windows one to one, as shown in fig. 5 and 6, the number of the through holes is one, that is, the through holes correspond to only one of the through holes, no matter which of the through holes is, the center line of the window 3 and the center line of the through hole 6 corresponding to the window must coincide, and it can be ensured that the pyroelectric infrared sensor is opposite to the center of the window after each movement of the square plate.
In an initial state, the pyroelectric infrared sensor 1 is opposite to the center of one window, a human body enters an induction range, after the pyroelectric infrared sensor 1 induces an infrared signal of the human body, the pyroelectric infrared sensor 1 sends a signal to the driving mechanism, the driving mechanism drives the square plate 2 to move, meanwhile, the pyroelectric infrared induction switch is turned on, a load starts to work, after the square plate 2 starts to move, the receiver 7 cannot receive a light beam emitted by the emitter 5, the receiver 7 also sends an electric signal to the driving mechanism, when the pyroelectric infrared sensor 1 does not induce the infrared signal when moving to the next window, the pyroelectric infrared sensor stops sending the electric signal to the driving mechanism, the load stops working, at the moment, the pyroelectric infrared sensor is probably not opposite to the center of the window, the light beam emitted by the emitter 5 cannot be received by the receiver 7, the receiver 7 continues to send the electric signal to the driving mechanism until the receiver receives the light beam of the emitter, the driving mechanism stops working, and the pyroelectric infrared sensor 1 can be opposite to the center of the window due to the coincidence of the perforation and the center line of the window, so that the effective induction of the pyroelectric infrared sensor 1 is ensured.
Example 4:
as shown in fig. 7, 8, 9 and 10, the present embodiment is different from embodiment 2 in that: the embodiment is also provided with a positioning mechanism similar to that of embodiment 3, and the operation principle is the same as that of embodiment 3, which is not described herein again.
As shown in fig. 11, fig. 11 is a schematic diagram of an operating circuit of the pyroelectric infrared sensor in embodiments 1 to 4 of the present invention, fig. 12 and 13 are schematic diagrams of an operating circuit of the positioning mechanism and the driving mechanism in embodiments 3 and 4, and a pin 6 OUT in an IC1 chip in fig. 11 is electrically connected to a port No. 1 in C4 in fig. 12 or ports No. 1 and No. 4 in C4 in fig. 13, and is used for inputting a human body infrared signal sensed by the pyroelectric infrared sensor, thereby controlling the operation of the driving mechanism and the positioning mechanism.
The operation principle of the active scanning pyroelectric infrared induction switch is as follows:
when human body heat enters a sensing area of the pyroelectric infrared sensor, the pyroelectric infrared sensor senses the human body heat and outputs a low-frequency pulse voltage to the IC1 chip, the low-frequency pulse voltage is amplified and processed by the delay circuit to output a high level to drive a relay or a controllable silicon to work a load, meanwhile, the high level output by the IC1 chip enables a driving mechanism to work, the driving mechanism drives an infrared chopping modulation device to carry out infrared chopping modulation on the human body infrared heat, the pyroelectric infrared sensor outputs a low-frequency pulse voltage, the pulse frequency time output by the pyroelectric infrared sensor needs to be higher than the delay time of the circuit, the IC1 chip keeps the high level output after the IC1 chip receives the low-frequency pulse voltage, the relay or the controllable silicon keeps supplying power to the load, meanwhile, the high level of the IC1 chip enables the driving mechanism to always drive the infrared chopping modulation device to work, and the infrared chopping modulation is carried out on the static human body infrared, at the moment, the pyroelectric infrared sensor can continuously output low-frequency pulsating voltage to the IC1 chip, the IC1 chip outputs high level to keep the relay and the driving mechanism to work normally after circuit processing, thus chopping of the static infrared heat of the human body enters a normal closed-loop mode, and long-time work of the pyroelectric infrared switch under the condition of static infrared signals can be kept. When the infrared heat of a human body leaves the sensing area of the pyroelectric infrared sensor, the pyroelectric infrared sensor cannot receive the pulsating infrared heat emitted by the chopping modulation device, the pyroelectric infrared sensor cannot output low-frequency pulsating voltage, and the IC1 chip outputs low level at the moment, so that the whole pyroelectric infrared sensing switch enters a standby state and waits for the infrared signal (including moving and static) of the human body to enter the sensing range of the pyroelectric infrared sensor.
After the IC1 chip is initialized, the IC1 chip outputs low level, the relay or the controllable silicon is powered off, the load stops working, at the moment, the driving mechanism also stops working, but the emitters and the receivers on the front side and the rear side of the infrared chopping modulation device are not aligned, at the moment, the receivers can also output high level, the driving mechanism continues to operate, when the emitters and the receivers are aligned, the receivers output low level to the driving mechanism, the driving mechanism stops working, and the whole pyroelectric infrared induction switch enters a standby state.
Referring to fig. 11 and fig. 12, the operation of the pyroelectric infrared sensor, the positioning mechanism and the driving mechanism will be specifically described, wherein a pin 6 OUT of the IC1 chip in fig. 11 is electrically connected to a port 1 in C4 in fig. 12, and is used for inputting human body infrared signals sensed by the pyroelectric infrared sensor 1. When the AC alternating current is connected and the voltage is reduced, the power output DC12V and DC12V supply power to U1 and U2 and supply power to the IC3CPU driving chip. The DC12V outputs DC2.5V to supply power to an IC1 chip and a pyroelectric infrared sensor after passing through U1, and the DC12V outputs DC5V to supply power to an IC2CPU chip and a groove-shaped optical coupler U3 after passing through U2. At this time, the IC1 chip enters into operation initialization, the output high level of the pin 6 of the IC1 chip is connected to the base pull-In relay of Q1 through R7 to supply power to the load, meanwhile, the pin 6 of the IC1 chip is connected to the base of Q2 through a diode D3 resistor R10, the collector of Q2 is connected with a resistor R9 to +5V, the collector of Q2 is inverted to low level because the base of Q2 is high level, and is connected to the pin (Pi In 2) 9 of the IC2CPU chip, and the pin 9 of the IC2CPU chip is low level. Meanwhile, the pin (Po OPLED) 6 of the IC2CPU chip inputs modulation current to the pin 2 of the slot-shaped optical coupler U3, and the pin (Pi OPLED) 5 of the IC2CPU chip receives demodulated low level and high level. When the pin 9 or the pin 5 of the IC2CPU chip is set to be low level, the pin (PoMOT 1) 2 of the IC2CPU chip is connected with the pin (Po MOT 1) 2 of the IC3CPU driving chip, the pin (PoMOT 2) 1 of the IC2CPU chip is connected with the pin (PoMOT 2) 3 of the IC3CPU driving chip, the pin (PoMOT 3) 14 of the IC2CPU chip is connected with the pin (Po MOT 3) 4 of the IC3CPU driving chip, the pin (Po MOT 4) 13 of the IC2CPU chip is connected with the pin (Po MOT 4) 5 of the IC3CPU driving chip, the pins 9, 12, 13, 14 and 15 of the IC3CPU driving chip are connected with the stepping motor, and the stepping motor rotates according to the set speed and direction.
When the work initialization of the IC1 chip is finished, the pin 6 of the IC1 chip outputs low level, and the Q1 loses power to release the relay to stop supplying power to the load. Since the collector of Q2 is flipped high when pin 6 of the IC1 chip is low, pin 9 of the IC2CPU chip is high. At this time, because the receiver and the transmitter of the slot-shaped optical coupler are not necessarily aligned with the through hole on the infrared chopping modulation device, the 5 feet of the IC2CPU chip can be at a low level. Because the IC2CPU chip sets the pin 9 or pin 5 as low level, the IC3CPU driving chip can drive the stepping motor to rotate. When the stepping motor continues to drive the infrared chopping modulation device to rotate to align the receiver and the emitter of the groove-shaped optical coupler with the through holes on the infrared chopping modulation device, the pin 5 of the IC2CPU chip is at a high level. When the 5 pin and the 9 pin of the IC2CPU chip are set to be high level, the IC2CPU chip shuts down the IC3CPU driving chip to work, and the stepping motor stops rotating. At the moment, the heating surface of the pyroelectric infrared sensor is aligned with the window on the plate body, and can receive the infrared heat source of the human body, and the infrared induction switch enters a standby state after initialization is finished.
When the infrared heat of a moving human body enters a detection unit of the pyroelectric infrared sensor in a standby state, the pyroelectric infrared sensor outputs a 2-pin of a low-frequency pulsating voltage value IC1 chip, a 6-pin of an IC1 chip outputs a high level to a Q1 base, an attraction relay supplies power to a load, meanwhile, the 6-pin of the IC1 chip is connected with a Q2 base through a diode D3 resistor R10, a collector of the Q2 is inverted into a 9-pin of a low level to an IC2CPU chip, and the IC2CPU chip is connected with an IC3CPU driving chip to drive a driving mechanism and an infrared chopping modulation device to work, so that the infrared heat of the static and moving human bodies is modulated. After the pyroelectric infrared sensor receives modulated human body infrared heat, the S pole of the pyroelectric infrared sensor continuously outputs low-frequency pulsating voltage to the 2 pin of the IC1 chip, the 6 pin of the IC1 chip outputs high level to the base electrodes of Q1 and Q2, the Q1 attracting relay supplies power to a load, and the collector electrode of Q2 is inverted into low level to be connected to the 9 pin of the IC2CPU chip. Because the chip of the IC1 has a delay setting, as long as the pulse frequency time input to the pin 2 of the chip of the IC1 by the pyroelectric infrared sensor is less than the delay time of the chip of the IC1, the pin 6 of the chip of the IC1 can maintain high level output, and at the moment, the whole pyroelectric infrared sensing switch can enter a closed loop mode to stably work for a long time. When the infrared heat of a human body leaves the detection range of the pyroelectric infrared sensor, the pyroelectric infrared sensing switch enables a transmitter on the groove-shaped optical coupler to be aligned with a receiver and a perforation of the infrared chopping modulation device through the positioning mechanism, at the moment, the IC2CPU chip outputs low level to the IC3CPU driving chip, the MOT of the driving mechanism stops working, the heating surface of the pyroelectric infrared sensor is aligned with a window, and the whole pyroelectric infrared sensing switch enters a standby state.
Claims (9)
1. The utility model provides an active scanning's pyroelectric infrared induction switch, includes pyroelectric infrared sensor, its characterized in that: the pyroelectric infrared sensor is characterized in that an infrared chopping modulation device is arranged in front of the pyroelectric infrared sensor, a plurality of windows are arranged on the infrared chopping modulation device, the infrared chopping modulation device is connected with a driving mechanism, the pyroelectric infrared sensor corresponds to the windows, the pyroelectric infrared sensor senses infrared signals through the windows and then sends the signals to the driving mechanism, and the driving mechanism drives the infrared chopping modulation device to move.
2. The actively scanned pyroelectric infrared inductive switch as claimed in claim 1, wherein: the infrared chopping modulation device is a plate body, a plurality of windows are arranged on the plate body, the centers of the windows are located on the same straight line, and the driving mechanism drives the plate body to do linear reciprocating motion relative to the pyroelectric infrared sensor.
3. The actively scanned pyroelectric infrared inductive switch as claimed in claim 1, wherein: the infrared chopping modulation device is a plate body, a plurality of windows are arranged on the plate body, the centers of the windows are located on the same circumference, and the driving mechanism drives the plate body to rotate relative to the pyroelectric infrared sensor.
4. The actively scanned pyroelectric infrared inductive switch as claimed in claim 1, wherein: the pyroelectric infrared sensor is opposite to the movement track of the center of the window, the pyroelectric infrared induction switch further comprises a positioning mechanism, and the positioning mechanism can drive the infrared chopping modulation device to move until the pyroelectric infrared sensor is opposite to the center of the window.
5. The actively scanned pyroelectric infrared inductive switch as claimed in claim 4, wherein: the positioning mechanism comprises a transmitter, a perforation and a receiver, wherein the transmitter and the receiver are respectively positioned on the front side and the rear side of the infrared chopping modulation device, at least one perforation is formed in the infrared chopping modulation device and is arranged on the infrared chopping modulation device, the perforation corresponds to a window, a medium transmitted by the transmitter penetrates through the perforation and is received by the receiver, the receiver does not send a signal to the driving mechanism, the medium transmitted by the transmitter is blocked by the infrared chopping modulation device, when the receiver cannot receive the medium, the receiver sends a signal to the driving mechanism, and the driving mechanism drives the infrared chopping modulation device to move.
6. The actively scanned pyroelectric infrared inductive switch as claimed in claim 5, wherein: the centre line of the window coincides with the centre line of the perforation corresponding thereto.
7. The actively scanned pyroelectric infrared inductive switch as claimed in claim 5, wherein: the number of the perforations is less than or equal to the number of the windows.
8. The actively scanned pyroelectric infrared inductive switch as claimed in claim 1, wherein: the driving mechanism is a stepping motor.
9. The actively scanned pyroelectric infrared inductive switch as claimed in claim 1, wherein: the pyroelectric infrared sensor and the infrared modulation device are positioned in the same lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910301327.5A CN111835324A (en) | 2019-04-15 | 2019-04-15 | Active scanning pyroelectric infrared induction switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910301327.5A CN111835324A (en) | 2019-04-15 | 2019-04-15 | Active scanning pyroelectric infrared induction switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111835324A true CN111835324A (en) | 2020-10-27 |
Family
ID=72914623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910301327.5A Pending CN111835324A (en) | 2019-04-15 | 2019-04-15 | Active scanning pyroelectric infrared induction switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111835324A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202026287U (en) * | 2011-02-25 | 2011-11-02 | 浙江丽得电器有限公司 | Pyroelectric human-body-induction delay switch |
| CN102788646A (en) * | 2012-08-30 | 2012-11-21 | 肖国选 | Active-type pyroelectric infrared sensor |
| CN102981423A (en) * | 2012-11-27 | 2013-03-20 | 林全忠 | Human infrared induction controller |
| CN103148946A (en) * | 2013-02-27 | 2013-06-12 | 慈溪思达电子科技有限公司 | Universal human body induction device |
| CN105093346A (en) * | 2015-05-19 | 2015-11-25 | 南京信息工程大学 | Infrared detection apparatus and method for detecting stationary human body and moving human body |
| CN209593388U (en) * | 2019-04-15 | 2019-11-05 | 蔡作华 | A kind of pyroelectric infrared-sensing switch of active scan |
-
2019
- 2019-04-15 CN CN201910301327.5A patent/CN111835324A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202026287U (en) * | 2011-02-25 | 2011-11-02 | 浙江丽得电器有限公司 | Pyroelectric human-body-induction delay switch |
| CN102788646A (en) * | 2012-08-30 | 2012-11-21 | 肖国选 | Active-type pyroelectric infrared sensor |
| CN102981423A (en) * | 2012-11-27 | 2013-03-20 | 林全忠 | Human infrared induction controller |
| CN103148946A (en) * | 2013-02-27 | 2013-06-12 | 慈溪思达电子科技有限公司 | Universal human body induction device |
| CN105093346A (en) * | 2015-05-19 | 2015-11-25 | 南京信息工程大学 | Infrared detection apparatus and method for detecting stationary human body and moving human body |
| CN209593388U (en) * | 2019-04-15 | 2019-11-05 | 蔡作华 | A kind of pyroelectric infrared-sensing switch of active scan |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5764147A (en) | Electronic article surveillance apparatus with an alarm | |
| EP1333706B2 (en) | Motorized window covering and method for controlling a motorized window covering | |
| US7679221B2 (en) | Power saving switch | |
| CN107166275B (en) | Novel intelligent home lighting device | |
| CN104266309A (en) | Method and device for controlling air conditioner to be stopped automatically | |
| JPH03142584A (en) | Motion detection apparatus and method for scanning system | |
| AU2014240093A1 (en) | Electronic circuit to capture lock controller pulses | |
| CN111835324A (en) | Active scanning pyroelectric infrared induction switch | |
| CN209593388U (en) | A kind of pyroelectric infrared-sensing switch of active scan | |
| CN205478483U (en) | 360 control circuit of auto -tracing electric fan | |
| CN209593391U (en) | It is a kind of that there are formula pyroelectric infrared-sensing switches | |
| CN111835330A (en) | Existing pyroelectric infrared induction switch | |
| CN109471255A (en) | A kind of electromagnetic drive optical attenuator switching device and switching system | |
| CN201004618Y (en) | Novel body induction switch | |
| JP2585718B2 (en) | Start switch device for automatic opening and closing door | |
| CN110608188B (en) | FFU controller based on wind speed closed-loop control | |
| CN208417021U (en) | A kind of shutdown automatic reset mechanism of electric fan | |
| CN111811664A (en) | Presence type human body induction sensor | |
| CN112017341A (en) | Thing networking access control system based on contrary reflective visible light communication | |
| CN219145363U (en) | Energy-saving inductive switch | |
| CN216313474U (en) | Static human body induction device, lighting device and disinfection device | |
| CN116311726B (en) | Safety burglar alarm based on laser detection abnormal region broadcasting | |
| CN213365697U (en) | Security protection device of low-power consumption | |
| CN204066331U (en) | A kind of multiple target tracking locating device | |
| CN212482709U (en) | Presence type human body induction sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |