CN2211630Y - Passitive infrared alarm - Google Patents
Passitive infrared alarm Download PDFInfo
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- CN2211630Y CN2211630Y CN 94238542 CN94238542U CN2211630Y CN 2211630 Y CN2211630 Y CN 2211630Y CN 94238542 CN94238542 CN 94238542 CN 94238542 U CN94238542 U CN 94238542U CN 2211630 Y CN2211630 Y CN 2211630Y
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- comparer
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- 230000000007 visual effect Effects 0.000 abstract description 9
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- 238000002955 isolation Methods 0.000 abstract description 2
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- 210000000695 crystalline len Anatomy 0.000 description 15
- 230000009545 invasion Effects 0.000 description 3
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Abstract
The utility model provides a passive infrared alarm in which optical detection and photoelectric conversion can be formed by a binary pyroelectric sensor and a combined frensnel lens. The utility model provides a shielding isolation device for prevent electromagnetic interference and strong light interference. Signal amplification processing and dynamic threshold processing can be formed by an integrated circuit and the periphery discrete components of the integrated circuit. The supervision visual field of the utility model can be 84 DEG multiplied by 26 DEG, and a detecting distance can be superior to 12 meters, which is suitable for theft protection alarm for indoor use and warehouses.
Description
The utility model relates to a kind of intruder's warning device, particularly a kind of passive infrared alarm of the invasion energy effect by heat or optical radiation.
Infrared intrusion alarm unit is divided into two kinds of active probe and passive detections usually.As CN 87212505 patents " active intrusion alarm device " is a kind of active invasion long-distance alarm device, and it must have a transmitter and a receiver, is applicable to the periphery warning, is not suitable for the Zone Alerts of broad angular field of view.
The purpose of this utility model is to provide a kind of broad visual angle that has, and can prevent the passive infrared alarm of the high reliability that Electromagnetic Interference and high light disturb.
Principle of the present utility model is made up of infra-red detection device, electric signal processing and amplifying device, shielding and isolating device and housing based on the passive infrared detection principle.Constitute primary optical system by the Fresnel Infrared Lens, infrared ray is converged on the double base pyroelectric sensor.When not having intrusion target to move in monitoring the visual field, the double base pyroelectric sensor is in balance does not have alert state, and the relay coil electric current is connected, and output does not have alert status signal; When the target invasion is arranged in the visual field, the infrared radiation of intrusion target at first receives a certain unit of dual element sensor, thereby destroyed original equilibrium state, sensor converts the non-equilibrium state of radiation on double base to electric signal, through signal processing and amplifying, block system relay coil current, output has alert status signal then.
For setting forth conveniently, earlier the utility model accompanying drawing is made brief description:
Fig. 1 is a front view of the present utility model;
Fig. 2 is a side view of the present utility model;
Fig. 3 is a component decomposition map of the present utility model;
Fig. 4 is an electrical schematic diagram of the present utility model;
The purpose of this utility model reaches by following technical solution:
Referring to accompanying drawing, the utility model is mainly by detective devices using infrared ray, and shielding and isolating device, the signal of telecommunication amplify treating apparatus and housing forms. Detective devices using infrared ray of the present utility model is made up of Pyroelectronic Sensor 7 and infrared combination Fresnel Lenses 3, combination Fresnel Lenses 3 is loaded on the middle part of the protecgulum 1 of housing, and pyroelectric sensor 7 is installed on the printed substrate 4, printed substrate 4 is fixed on bonnet 2 inner chambers, when the protecgulum 1 of housing and bonnet 2 close up cover tightly after, distance between combination Fresnel Lenses 3 and the sensor 7 just is the focal length of Fresnel Lenses 3, and the photosurface of sensor 7 is on the focal plane of Fresnel Lenses 3. Sensor 7 double bases direction arranged side by side and combination Fresnel Lenses 3 every group of Fresnel Lenses unit and column direction consistent.
Between sensor 7 and combination Fresnel Lenses 3 shielding and isolating device 5 is housed, it is that metal semiclosed cover and infrared interference filter 6 form. It is installed between sensor 7 and the Fresnel Lenses 3. Shielding and isolating device 5 covers on the component side that is welded on printed circuit board (PCB) 4 on the sensor. Have a small square hole at shielding and isolating device 5, the below of small square hole is exactly the photosurface of sensor 7, and an infrared interference filter 6 is housed on the small square hole; Infrared interference filter 6 is 5 microns front edge filter for 0.5 millimeter spike length of thickness.
Signal amplifier, breaking-proof switch 11, relay 10, dynamic threshold treatment circuit 12, control relay circuit 13 and binding post 9 that electric signal processing and amplifying device of the present utility model is made up of integrated circuit 8 and discrete component thereof are formed; they are installed on the printed-wiring board (PWB) 4; constituting signal with integrated circuit 8 and other discrete component amplifies; dynamic threshold circuit 12 is handled the signal that has amplified; breaking-proof switch 11 these machines of protection prevent from illegally to open shell, and relay 10 and binding post 9 are formed to be had the police or do not have alert state output.
The utility model has following beneficial effect:
1. this passive infrared alarm volume is little, in light weight, in case find that it is the output alarm status signal that people's activity is arranged in its monitor area, in case this machine of discovery is illegally opened also output alarm status signal immediately of housing;
2. can both work this passive infrared alarm daytime and night;
3. this passive infrared alarm can suppress the interference of radio electromagnetsm ripple and white light effectively;
4. this passive infrared alarm surveillance distance is not less than 12 meters, and the visual field is 84 ° * 26 °.The visual angle that broad is arranged.
The utility model designer recommends following embodiment:
Shell is made with the PPO plastics, and the face shape curvature of shell protecgulum 1 matches with the focal length of combination Fresnel Lenses 3.Fresnel Lenses 3 is made up of the three groups of single-element lenss in upper, middle and lower, and group contains 12 unit on it, and middle group contains 8 unit, and following group contains 5 unit, and last group monitors zone far away, middle group of zone that monitors moderate distance, and following group monitors immediate area.Every group curves the cylinder shape again, forms the visual field at 84 ° at top view visual angle, 26 ° at side-looking visual angle.
Protecgulum 1 and bonnet 2 rely on two on top, concavo-convex totally three the hasp lockings in bottom, printed circuit board (PCB) 4 is screwed on the inner chamber of bonnet 2, and protecgulum 1 and bonnet 2 close up the photosurface that makes at the pyroelectric sensor on the printed-wiring board (PWB) 47 and just be positioned on the focal plane of combination Fresnel Lenses 3.One shielding and isolating device 5 is housed between the Fresnel Lenses 3 of sensor 7, and it is that (the square metal cover that the punching out of thickness=0.3mm) becomes is joined interference filter 6 and formed with sheet metal.Shielding and isolating device 5 covers on the top of sensor 7, be welded on the printed-wiring board (PWB) 4, have a square hole on the top of shielding and isolating device 5, it under the square hole photosurface of sensor 7, an infrared interference filter 6 is housed on the square hole, interference filter 6 usefulness thickness are the preceding cutoff filter that the silicon materials of 0.5mm are made, an its spike length is 5 μ m, interference filter 6 usefulness fluting patterning methods are made 11 millimeters * 9 millimeters square, just with shielding and isolating device 5 on square opening coupling, cement with the black adhesive glue between the metal shell of interference filter 6 and shielding and isolating device, utilize the conductive characteristic of interference filter 6 incision silicon materials and the metal shell of shielding and isolating device 5 to constitute electromagnetic screen good isolation layer together.Interference filter 6 elimination visible light, and allow infrared energy to be transmitted on the photosurface of sensor 7.
Referring to accompanying drawing 4, the electric signal processing and amplifying device of present embodiment is made up of biasing anti-clutter circuit, signal amplification circuit, dynamic threshold treatment circuit 12, control relay circuit 13, relay 10, breaking-proof switch 11 and binding post 9.The electric signal input signal amplifier of sensor 7 carries out delivering to dynamic threshold treatment circuit 12, and then delivering to control relay circuit 13 after two-stage amplifies, commands relays 10 actions, and the contact of relay 10 is drawn and is received on the binding post 9 as the output of reporting to the police; It is normally closed that control relay circuit 13 and breaking-proof switch 11 are arranged to the contact to the alert state of nothing, often opens there being alert state to be arranged to the contact; Positive supply passes through R
5, R
6, C
7, C
8, C
9The filtering circuit of forming is connected to the D utmost point of sensor 7 and gives sensor 7 power supplies; The S utmost point of sensor 7 connects a resistance R over the ground
1, the quiescent current of adjustment sensor; Sensor 7 passes through R with echo signal by the S utmost point
2The 3rd pin of delivering to integrated circuit 8, model and be LM358 carries out first order high pass and amplifies, and passes through C again
12, potentiometer W
1, resistance R
7With thermistor W
TParallel network the 5th pin of delivering to LM358 carry out second level frequency-selecting and amplify, the signal after the amplification exports subsequently dynamic threshold treatment circuit 12 to from the 7th pin of LM358; Dynamic threshold treatment circuit 12 is that the level Four comparer that LM324 integrated circuit and accessory circuit thereof are formed is realized jointly by model; The threshold potential of comparer (IC2:C) (the 9th pin of IC2) is by positive supply R
14, R
15, R
16, C
16, transistor U
2Zone network is provided; The threshold potential of comparer (IC2:B) (the 5th pin of IC2) is by positive supply R
11, R
12, R
13, C
15, transistor U
1Zone network is provided; R is passed through in the output of comparer (IC2:B) simultaneously
17And U
2, C
16To the adjustment of delaying time of the threshold value of comparer (IC2:C), R is also passed through in the output of comparer (IC2:C) in like manner
18And U
1, C
15To the adjustment of delaying time of the threshold value of comparer (IC2:B); The threshold value of comparer (IC2:A) is by positive supply R
25, R
26And R
21, R
22, R
23, R
24, C
17, C
18, transistor U
3, U
4Zone network is provided; The state turnover of comparer (IC2:A) passes through R by the output of comparer (IC2:B)
19, U
3, C
17And R is passed through in the output of comparer (IC2:C)
20, U
4, C
18Control jointly; The output control transistor U of comparer (IC2:A)
5Conducting and end, thereby the decision comparer (IC2:D) output; So dynamic threshold treatment circuit 12 is threshold values can be with the two-way comparer of input signal variation, thresholding is not regulated than higher and noise is inhibited automatically when having trigger pip, thresholding is turned down automatically and is allowed signal to pass through when trigger pip, and automatically signal is carried out twice incorgruous step-by-step counting, dynamic threshold treatment circuit 12 is just sent a useful signal when occurring continuous two incorgruous pulse signals at the appointed time, otherwise first signal of occurring of cancellation has useful signal output automatically; Comparer (IC2:D) export control relay circuit 13 to, wherein one the tunnel and R
29, light emitting diode D
2The warning indicative function that linked to each other with positive supply, another road is by transistor U
6, R
30, U
7The adhesive of pilot relay 10; Control relay circuit 13 is connected the coil current of relay 10 when not receiving the useful signal of dynamic threshold treatment circuit 12, makes the contact adhesive of relay 10, and the contact of relay is guided on the binding post 9 as there not being alert state output; With regard to the electric current of sever supply relay 10 coils, the contact of relay 10 disconnects when control relay circuit 13 is received the useful signal of dynamic threshold treatment circuit 12; The contact of breaking-proof switch 11 is guided on the binding post 9, when shell protecgulum 1 and bonnet 2 close up lid breaking-proof switch 11 contact short when tight, the status signal that binding post 9 outputs are not taken apart; When shell protecgulum 1 separated with bonnet 2, the contact of breaking-proof switch 11 disconnected, and binding post 9 is just exported the status signal that is opened.
Claims (1)
1, a kind of passive infrared alarm is made up of infra-red detection device, shielding and isolating device, electric signal processing and amplifying device and housing, it is characterized in that:
(a) said infra-red detection device is made up of two no pyroelectric sensors (7) and infrared combination Fresnel Lenses (3), combination Fresnel Lenses (3) is contained in the middle part of housing protecgulum (1), pyroelectric sensor (7) is contained on the printed circuit board (PCB) (4), printed circuit board (PCB) (4) is fixed on the inner chamber of housing bonnet (2), and the photosurface of pyroelectric sensor (7) when closing up just in time is on the focal plane of Fresnel Lenses (3) when housing protecgulum (1) and bonnet (2); The outer Fresnel Lenses (3) of the double base of sensor (7) and column direction and combinations red every group of Fresnel Lenses unit and column direction consistent; The components and parts of electric signal processing and amplifying device are welded on the printed circuit board (PCB) (4);
(b) said shielding and isolating device (5) is that semiclosed metal cap and the infrared interference filter (6) that becomes with the sheet metal punching out formed, shielding and isolating device (5) is contained between sensor (7) and the Fresnel Lenses (3), shielding and isolating device (5) covers on the sensor (7), the photosurface of alignment sensor (7) under the infrared interference filter (6) on the shielding and isolating device (5), infrared interference filter (6) are 5 microns preceding cutoff filter for thickness 0.5 millimeter, spike length;
(c) signal amplifier be made up of integrated circuit (8) and discrete component thereof of said electric signal processing and amplifying device, dynamic threshold treatment circuit (12), control relay circuit (13), relay (10), breaking-proof switch (11) and binding post (9) constitute, after the electric signal input signal amplifier of sensor (7) carries out the two-stage amplification, deliver to dynamic threshold treatment circuit (12), and then deliver to control relay circuit (13), commands relays (10) action, the contact of relay (10) are drawn and are received binding post (9) and go up as the output of reporting to the police; It is normally closed that control relay circuit (13) and breaking-proof switch (11) are arranged to the contact to the alert state of nothing, often opens there being alert state to be arranged to the contact; Positive supply passes through R
5, R
6, C
7, C
8, C
9The filtering circuit of forming is connected to the D utmost point of sensor (7) and gives sensor (7) power supply; The S utmost point of sensor (7) connects a resistance R over the ground
1, the quiescent current of adjustment sensor; Sensor (7) passes through R with echo signal by the S utmost point
2The 3rd pin of delivering to integrated circuit (8), model and be LM358 carries out first order high pass and amplifies, and passes through C again
12, potentiometer W
1, resistance R
7With thermistor W
TParallel network the 5th pin of delivering to LM358 carry out second level frequency-selecting and amplify, the signal after the amplification exports subsequently dynamic threshold treatment circuit (12) to from the 7th pin of LM358; Dynamic threshold treatment circuit (12) is that the level Four comparer that LM324 integrated circuit and accessory circuit thereof are formed is realized jointly by model; (IC2: threshold potential C) (the 9th pin of IC2) is by positive supply R for comparer
14, R
15, R
16, C
16, transistor U
2Zone network is provided; (IC2: threshold potential B) (the 5th pin of IC2) is by positive supply R for comparer
11, R
12, R
13, C
15, transistor U
1Zone network is provided; While comparer (IC
2: R is passed through in output B)
17And U
2, C
16To comparer (IC
2: threshold value C) delay time adjustment, in like manner comparer (IC
2: R is also passed through in output C)
16And U
1, C
15To comparer (IC
2: the adjustment of delaying time of threshold value B); Comparer (IC
2: threshold value A) is by positive supply R
25, R
26And R
21, R
22, R
23, R
24, C
17, C
18, transistor U
3, U
4Zone network is provided; Comparer (IC
2: R is passed through in output B)
19, U
3, C
17And comparer (IC
2: R is passed through in output C)
20, U
4, C
18Control jointly; Comparer (IC
2: output control transistor U A)
5Conducting and end, thereby decision comparer (IC
2: output D); So dynamic threshold treatment circuit (12) is a threshold value can be with the two-way comparer of input signal variation; Thresholding is not regulated than higher and noise is inhibited automatically when having trigger pip, thresholding is turned down automatically and is allowed signal to pass through when trigger pip, and automatically signal is carried out twice incorgruous step-by-step counting, dynamic threshold treatment circuit (12) is just sent a useful signal when occurring continuous two incorgruous pulse signals at the appointed time, otherwise first signal of occurring of cancellation has useful signal output automatically; Comparer (IC
2: D) export control relay circuit (13) to, wherein one the tunnel and R
29, light emitting diode D
2The warning indicative function that linked to each other with positive supply, another road is by transistor U
6, R
30, U
7The adhesive of pilot relay (10); Control relay circuit (13) is connected the coil current of relay (10) when not receiving the useful signal of dynamic threshold treatment circuit (12), make the contact adhesive of relay (10), the contact of relay is guided to binding post (9) and is gone up as there not being alert state output; With regard to the electric current of sever supply relay (10) coil, the contact of relay (10) disconnects when control relay circuit (13) is received the useful signal of dynamic threshold treatment circuit (12); The contact of breaking-proof switch (11) is guided on the binding post (9), when shell protecgulum (1) and bonnet (2) close up lid breaking-proof switch (11) contact short when tight, the status signal that binding post (9) output is not taken apart; When shell protecgulum (1) and bonnet (2) when separating, the contact of breaking-proof switch (11) disconnects, and binding post (9) is the status signal that is opened of output just.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94238542 CN2211630Y (en) | 1994-04-14 | 1994-04-14 | Passitive infrared alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94238542 CN2211630Y (en) | 1994-04-14 | 1994-04-14 | Passitive infrared alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2211630Y true CN2211630Y (en) | 1995-11-01 |
Family
ID=33845926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94238542 Expired - Lifetime CN2211630Y (en) | 1994-04-14 | 1994-04-14 | Passitive infrared alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2211630Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100527177C (en) * | 2005-03-30 | 2009-08-12 | 欧宝士株式会社 | Crime prevention sensor with frost protection step difference |
| CN101732052B (en) * | 2009-11-16 | 2011-08-17 | 清华大学 | Infrared measuring device and method for human motion modality |
| CN102346950A (en) * | 2011-09-21 | 2012-02-08 | 成都理想科技开发有限公司 | Human body invasion detector capable of intelligent analysis and detection method thereof |
| CN102507017A (en) * | 2011-10-17 | 2012-06-20 | 李云飞 | Digital type human body infrared receiver |
| CN107852452A (en) * | 2015-07-29 | 2018-03-27 | Lg伊诺特有限公司 | Camara module |
| CN110599720A (en) * | 2019-09-04 | 2019-12-20 | 蚌埠学院 | Pyroelectric infrared detection anti-theft monitoring system |
| CN115588263A (en) * | 2022-10-10 | 2023-01-10 | 中国人民解放军军事科学院系统工程研究院 | Method for realizing perimeter safety of closed space based on single photon detection |
-
1994
- 1994-04-14 CN CN 94238542 patent/CN2211630Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100527177C (en) * | 2005-03-30 | 2009-08-12 | 欧宝士株式会社 | Crime prevention sensor with frost protection step difference |
| CN101732052B (en) * | 2009-11-16 | 2011-08-17 | 清华大学 | Infrared measuring device and method for human motion modality |
| CN102346950A (en) * | 2011-09-21 | 2012-02-08 | 成都理想科技开发有限公司 | Human body invasion detector capable of intelligent analysis and detection method thereof |
| CN102507017A (en) * | 2011-10-17 | 2012-06-20 | 李云飞 | Digital type human body infrared receiver |
| CN107852452A (en) * | 2015-07-29 | 2018-03-27 | Lg伊诺特有限公司 | Camara module |
| CN107852452B (en) * | 2015-07-29 | 2020-09-18 | Lg伊诺特有限公司 | camera module |
| CN110599720A (en) * | 2019-09-04 | 2019-12-20 | 蚌埠学院 | Pyroelectric infrared detection anti-theft monitoring system |
| CN115588263A (en) * | 2022-10-10 | 2023-01-10 | 中国人民解放军军事科学院系统工程研究院 | Method for realizing perimeter safety of closed space based on single photon detection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |