CN201903962U - Novel infrared transmitting and receiving device capable of resisting strong interference - Google Patents
Novel infrared transmitting and receiving device capable of resisting strong interference Download PDFInfo
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- CN201903962U CN201903962U CN201020613839XU CN201020613839U CN201903962U CN 201903962 U CN201903962 U CN 201903962U CN 201020613839X U CN201020613839X U CN 201020613839XU CN 201020613839 U CN201020613839 U CN 201020613839U CN 201903962 U CN201903962 U CN 201903962U
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Abstract
The utility model relates to the technical filed of infrared transmitting and receiving, in particular to a novel infrared transmitting and receiving device capable of resisting strong interference, which comprises an transmitting circuit and a receiving circuit, wherein the transmitting circuit comprises an infrared transmitting tube for transmitting infrared signals, and an transmitting modulation processing circuit for generating frequency signals to modulate and process the infrared signals; the receiving circuit comprises an infrared receiving tube and a band-pass filter for filtering the infrared signals received by the infrared receiving tube; and after being filtered by the band-pass filter, the infrared signals are input to a receiving and processing circuit to be subject to the follow-up processing. In the utility model, the infrared transmitting circuit uses signals with specific frequency to modulate the infrared emitted by the infrared transmitting tube; and at a receiving end, the received signals are filtered by the band-pass filter, so that the signals except the signals with specific frequency are filtered, and the purpose of filtering the interference signals is achieved. The technology and structure are simplified, the cost is low, and the interference from sunlight and other environment light can be effectively eliminated.
Description
Technical field
The utility model relates to infrared emission reception technique field, but is specifically related to the fired infrared receiver of strong ambient light interference such as a kind of novel antisum.
Background technology
A lot of fields such as automobile, Industry Control, consumer electronics are all used devices such as infrared emission, detection and are realized automatic control now.But infrared facility has individual unfavorable factor in application be exactly the interference that very easily is subjected to external environment light, the infrared ray that sends such as various objects particularly comprises a large amount of ultrared sunlight and will cause extremely strong interference to infrared facility, so good antijamming capability is the problem that the design infrared transceiver device at first will be considered.
At present, in order to guarantee the reliable and stable operation of infrared equipment, most of infrared equipment makes and improves antijamming capability with the following method in the application in fields such as automobile, industry control, consumer electronics:
1, consider from the optics aspect anti-interference, for example the common TV remote of people receive the optical filter of a front, at the higher special lens or the like that occasion is used of ask for something, all be to adopt the interference free performance of optical effect with the raising infrared receiver device.But anti-interference from the consideration of optics aspect, effect is unsatisfactory.Because optics filtering fully produces the surround lighting that disturbs, optics also can filter out the useful infrared ray of part in filtering interfering light in addition.
2, anti-interference from the consideration of electronic circuit aspect, be the disclosed infrared emission modulation of 00229394.3 utility model patent automaton as China Patent No., it is anti-interference that it adopts the anti-interference delay circuit of filtering.This class circuit can reach jamproof requirement within the specific limits, but when running under strong surround lighting, the situation as sunshine, daylight lamp or electricity-saving lamp direct projection, its anti-interference effect obviously weakens.
Common anti-jamming circuit uses audio decoder IC LM567 to constitute in addition now, but some defective of circuit that this IC constitutes: the one, the frequency of operation of receiving end is wanted to keep identical with the frequency that transmits is strict; The 2nd, receiving end successfully receive identification transmit after, its output terminal can only be exported a fixing low level, is unfavorable for the application in some circuit like this.
Chinese patent 200720071396.4 disclosed anti-strongly disturbing active infrared intrsion detectors, by narrow pulse generating circuit and burst pulse control circuit, and the collaborative work of double operational bandpass filter realizes filtering, although strong jamming there is being certain effect, but its circuit complexity, the cost height.
The utility model content
But technical problem to be solved in the utility model provides the fired infrared receiver of strong ambient light interference such as a kind of antisum.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is as follows:
Design the strongly disturbing fired infrared receiver of a kind of novel anti, comprise radiating circuit and receiving circuit, described radiating circuit comprises the infrared transmitting tube of launching infrared signal and is used to produce frequency signal carries out modulation treatment to infrared signal emission modulation treatment circuit, described receiving circuit comprises infrared receiving tube and the infrared signal that infrared receiving tube receives is carried out the bandpass filter of Filtering Processing, is input to receiving processing circuit through the infrared signal behind the bandpass filter filtering interference signals and carries out subsequent treatment.
Preferably, described emission modulation treatment circuit and receiving processing circuit can be a MCU, also can be two MCU, and described MCU selects to use the MC9S08DN of Freescale.Adopt two MCU respectively the infrared signal of emission, reception to be handled, just can make emission, receiving circuit can be positioned over different zones, the scope of application is wider; Certainly also can not use MCU and use other circuit or device that the signal of emission, reception is handled.
For the ease of selecting filtering, the wave filter that described bandpass filter selects model to constitute for the MC4558 double operational.
For further improving the antijamming capability of circuit, can also optionally use the leaded light bar that the infrared ray of infraluminescence pipe emission is carried out leaded light.
The utility model compared with prior art has following advantage:
(1) compare with the device that much reaches anti-interference purpose by optics now, present techniques is to improve the antijamming capability of infrared transceiver device by electronic circuit, can simplify complicated anti-interference optics design greatly.
(2) receiving terminal circuit of present patent application technology receives the signal of corresponding transmitting terminal emission and the signal that output is identical with the transmitting terminal frequency modulating signal, amplitude is adjustable after processing of circuit such as filtering; And LM567 receiving circuit now commonly used receives to identify and can only export fixing low level after transmitting, so the scope of application of present patent application technology is wider.
(3) present patent application can be used the infrared R-T unit of many covers in the same area, and every cover system uses the working signal of different frequency, can not influence each other.
(4) use optical filter to come the way of filtering interfering light just opposite in some applications with existing, present patent application can be in some special application guides in the path of infrared ray at needs and transmits by increasing the leaded light bar, the leaded light bar can be made into arbitrary shape by the path that infrared ray need transmit, thereby can further improve its antijamming capability in special applications.
Description of drawings
Fig. 1 is an embodiment block scheme of the present utility model.
Embodiment
For the ease of it will be appreciated by those skilled in the art that design is explained in further detail to the utility model below in conjunction with accompanying drawing and specific embodiment.
The utility model infrared emission circuit uses the signal of characteristic frequency that the infrared ray of infrared transmitting tube emission is modulated, use bandpass filter to carry out Filtering Processing to the received signal at receiving end, filtering other signal except that this set specific frequency signal, thus reach filtering interference signals, keep the purpose of useful signal.In some special application scenarios, can also optionally increase the antijamming capability that the leaded light bar further improves this device.
Circuit shown in Figure 1 is a specific embodiment.In the present embodiment, emission modulation treatment circuit and the shared MCU of receiving processing circuit, MCU in the circuit can use the MC9S08DN of Freescale (Freescale) to produce frequency and as f pulse signal S the signal of infrared transmitting tube D1 emission be modulated, and the resistance R 1 of series connection is used to regulate the intensity that transmits.
At receiving end, the bandpass filter of Filtering Processing is the double operational bandpass filter, the signal that for the bandpass filter that has double operational MC4558 infrared receiving tube D2 is received in the present embodiment carries out Filtering Processing, and the frequency that detects is the signal S of f, and signal S is delivered to MCU do subsequent treatment; Going back MCU in actual the use also can use software filtering with further raising antijamming capability.
In the present embodiment, also on the infrared signal transmission path between infrared transmitting tube D1 and infrared receiving tube D2, be provided with leaded light bar 10, leaded light bar 10 can be made into arbitrary shape by the path that infrared signal need be transmitted, thereby can further improve the antijamming capability of circuit in special applications.The leaded light bar especially is fit to be installed on the special transmission path, and the path such as propagating at non-rectilinears such as bending, rotations guides infrared signal to transmit in special path.
The above embodiment has only expressed embodiment of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be noted that; for the person of ordinary skill of the art, under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement; as launch selection variation of modulation treatment circuit and receiving processing circuit etc., these all belong to protection domain of the present utility model.
Claims (5)
1. the strongly disturbing fired infrared receiver of novel anti comprises radiating circuit and receiving circuit, it is characterized in that:
Described radiating circuit comprises the infrared transmitting tube of launching infrared signal and is used to produce frequency signal infrared signal is carried out the emission modulation treatment circuit of modulation treatment,
Described receiving circuit comprises infrared receiving tube and the infrared signal that infrared receiving tube receives is carried out the bandpass filter of Filtering Processing, is input to receiving processing circuit through the infrared signal behind the bandpass filter filtering interference signals and carries out subsequent treatment.
2. the strongly disturbing fired infrared receiver of novel anti according to claim 1 is characterized in that: described emission modulation treatment circuit and receiving processing circuit are a MCU, and described MCU selects to use the MC9S08DN of Freescale.
3. the strongly disturbing fired infrared receiver of novel anti according to claim 1 is characterized in that: described emission modulation treatment circuit and receiving processing circuit use a MCU respectively, and described MCU selects to use the MC9S08DN of Freescale.
4. according to claim 2 or the strongly disturbing fired infrared receiver of 3 described novel anti, it is characterized in that: the wave filter that described bandpass filter selects model to constitute for the MC4558 double operational.
5. the strongly disturbing fired infrared receiver of novel anti according to claim 4, it is characterized in that: described on the transmission path of the infrared signal that infrared transmitting tube is launched, the leaded light bar that the guiding infrared signal is transmitted in special path also can be installed, and described leaded light bar is used for further improving the antijamming capability of circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020613839XU CN201903962U (en) | 2010-11-15 | 2010-11-15 | Novel infrared transmitting and receiving device capable of resisting strong interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020613839XU CN201903962U (en) | 2010-11-15 | 2010-11-15 | Novel infrared transmitting and receiving device capable of resisting strong interference |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201903962U true CN201903962U (en) | 2011-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201020613839XU Expired - Fee Related CN201903962U (en) | 2010-11-15 | 2010-11-15 | Novel infrared transmitting and receiving device capable of resisting strong interference |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106019561A (en) * | 2016-05-16 | 2016-10-12 | 上海理鑫光学科技有限公司 | Compact rangefinder telescope |
| CN106773616A (en) * | 2016-12-30 | 2017-05-31 | 江苏苏威尔科技有限公司 | A kind of moving object of environment resistant light interference is in the light time measurement device and method |
| CN113726982A (en) * | 2021-08-31 | 2021-11-30 | 上海兰宝传感科技股份有限公司 | Photoelectric sensor capable of resisting high-frequency light interference |
| CN115657151A (en) * | 2022-12-22 | 2023-01-31 | 钛玛科（北京）工业科技有限公司 | Infrared correlation detection circuit and infrared sensor |
| CN117191093A (en) * | 2023-11-08 | 2023-12-08 | 钛玛科（北京）工业科技有限公司 | Anti-interference infrared sensor and working method thereof |
-
2010
- 2010-11-15 CN CN201020613839XU patent/CN201903962U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106019561A (en) * | 2016-05-16 | 2016-10-12 | 上海理鑫光学科技有限公司 | Compact rangefinder telescope |
| CN106773616A (en) * | 2016-12-30 | 2017-05-31 | 江苏苏威尔科技有限公司 | A kind of moving object of environment resistant light interference is in the light time measurement device and method |
| CN113726982A (en) * | 2021-08-31 | 2021-11-30 | 上海兰宝传感科技股份有限公司 | Photoelectric sensor capable of resisting high-frequency light interference |
| CN115657151A (en) * | 2022-12-22 | 2023-01-31 | 钛玛科（北京）工业科技有限公司 | Infrared correlation detection circuit and infrared sensor |
| CN117191093A (en) * | 2023-11-08 | 2023-12-08 | 钛玛科（北京）工业科技有限公司 | Anti-interference infrared sensor and working method thereof |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110720 Termination date: 20131115 |