CN112213977A - Anti-interference infrared induction circuit - Google Patents
Anti-interference infrared induction circuit Download PDFInfo
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- CN112213977A CN112213977A CN202011077744.5A CN202011077744A CN112213977A CN 112213977 A CN112213977 A CN 112213977A CN 202011077744 A CN202011077744 A CN 202011077744A CN 112213977 A CN112213977 A CN 112213977A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
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- Automation & Control Theory (AREA)
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Abstract
The invention discloses an anti-interference infrared sensing circuit which comprises a 24V input end, a voltage reduction module connected with the 24V input end, a constant current output module connected with the 24V input end, an MOS (metal oxide semiconductor) tube driving module connected with the constant current output module, a lamp control interface connected with the MOS tube driving module, a 5V output end connected with the voltage reduction module, a main control MCU module connected with the 5V output end, and an infrared sensing module connected with the main control MCU module, wherein the main control MCU module is connected with the MOS tube driving module, the main control MCU module is connected with the constant current output module, the anti-interference infrared sensing circuit also comprises a phase-locked loop circuit module, the 5V output end is connected with the phase-locked loop circuit module to supply power for the phase-locked loop circuit module, the phase-locked loop circuit module is connected with the infrared sensing module and is used. According to the invention, the problem of easy misoperation during infrared induction can be effectively solved by adding the phase-locked loop circuit module, and the identification rate of infrared induction is effectively improved.
Description
The technical field is as follows:
the invention relates to the technical field of infrared induction, in particular to an anti-interference infrared induction circuit.
Background art:
traditional infrared induction circuit is widely used in intelligent control, for example the control of lamps and lanterns, but traditional infrared induction circuit is because the interference killing feature is not enough, leads to the condition that the during operation produced the malfunction easily, influences infrared induction's recognition rate, leads to intelligent control efficiency irrational inadequately.
Based on the problems, the inventor develops a novel anti-interference infrared induction circuit, can effectively solve the problem that misoperation is easily caused during infrared induction, and effectively improves the identification rate of the infrared induction.
The invention content is as follows:
the invention aims to overcome the defects of the prior art and provides an anti-interference infrared sensing circuit.
In order to solve the technical problems, the invention adopts the following technical scheme: the anti-interference infrared sensing circuit comprises a 24V input end, a voltage reduction module connected with the 24V input end, a constant current output module connected with the 24V input end, an MOS tube driving module connected with the constant current output module, a lamp control interface connected with the MOS tube driving module, a 5V output end connected with the voltage reduction module, a main control MCU module connected with the 5V output end, and an infrared sensing module connected with the main control MCU module, the main control MCU module is connected with the MOS tube driving module to control whether the MOS tube driving module is conducted or not, the main control MCU module is connected with the constant current output module and also comprises a phase-locked loop circuit module, the 5V output end is connected with the phase-locked loop circuit module to supply power to the phase-locked loop circuit module, the phase-locked loop circuit module is connected with the infrared induction module and used for interfacing induction signals sent by the infrared induction module, and the phase-locked loop circuit module is connected with the main control MCU module.
Furthermore, in the above technical solution, the pll circuit module includes a pll chip connected to the 5V output terminal, an RC oscillation circuit connected to the pll chip, a resistor R15 connected to the RC oscillation circuit, and a transistor Q3, the infrared sensing module includes an infrared sensor head connected to the transistor Q3, the pll chip is further connected to an output terminal of the infrared sensor head, and the pll chip is connected to the main control MCU module through an integral delay loop.
Further, in the above technical solution, the pole B of the triode Q3 is connected to the resistor R15, the pole C of the triode Q3 is connected to the infrared sensor after being connected to the resistor R16, the resistor R16 is connected in parallel to the resistor R17, and the pole E of the triode Q3 is connected to the 5V output terminal.
Furthermore, IN the above technical solution, the model of the pll chip is LM567, the RT pin of the pll chip is connected to the RC oscillation circuit, the OUT pin of the pll chip is connected to the integration delay loop, the V + pin of the pll chip is connected to the 5V output terminal, and the IN pin of the pll chip is connected to the output terminal of the infrared sensor.
Further, in the above technical solution, the integration delay loop includes a resistor R12 and a capacitor C13 connected in parallel to two ends of the resistor R12, and two ends of the resistor R12 are respectively connected to the phase-locked loop chip and the main control MCU module.
Further, in the above technical solution, a diode D1 for preventing reverse connection is connected between the 24V input end and the voltage reduction module, an anode of the diode D1 is connected to the 24V input end, and a cathode of the diode D1 is connected to the voltage reduction module.
Furthermore, in the above technical solution, the voltage-reducing module includes a voltage-reducing chip connected to the cathode of the diode D1, and a capacitor C17 and an inductor L3 connected to the voltage-reducing chip, the inductor L3 is connected to the capacitor C19 and then grounded, the inductor L3 is also connected to the electrolytic capacitor C121 and then grounded, the inductor L3 is connected to the 5V output terminal, and the model of the voltage-reducing chip is AH 8310C.
Further, in the above technical solution, the constant current output module includes a constant current chip and an inductor L2 connected to the constant current chip, the inductor L2 is connected to the lamp control interface, a diode D2 is connected between the constant current chip and the 24V input terminal, and the model of the constant current chip is MP 2410A.
After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects: according to the invention, after the LM567 phase-locked loop circuit module is added in detection, a signal received by the infrared induction head is accurately compared with a transmitted signal, and when the frequency of the signal is close to that of the transmitted signal, the signal is locked and a low level is stably output to be controlled by the main control MCU module, so that the problem of easy misoperation in infrared induction is effectively solved, and meanwhile, the anti-interference performance of the infrared induction is effectively improved.
Description of the drawings:
FIG. 1 is a block schematic diagram of the present invention;
fig. 2 is a circuit diagram of the present invention.
The specific implementation mode is as follows:
the invention is further illustrated below with reference to specific embodiments and the accompanying drawings.
As shown in fig. 1-2, the anti-interference infrared sensing circuit includes a 24V input terminal 1, a voltage-reducing module 2 connected to the 24V input terminal 1, a constant current output module 3 connected to the 24V input terminal 1, a MOS transistor driving module 4 connected to the constant current output module 3, a lamp control interface 5 connected to the MOS transistor driving module 4, a 5V output terminal 6 connected to the voltage-reducing module 2, a main control MCU module 7 connected to the 5V output terminal 6, and an infrared sensing module 8 connected to the main control MCU module 7, wherein the main control MCU module 7 is connected to the MOS transistor driving module 4 to control whether the MOS transistor driving module 4 is turned on, and the main control MCU module 7 is connected to the constant current output module 3, and is characterized in that: the infrared induction type phase-locked loop is characterized by further comprising a phase-locked loop circuit module 9, the 5V output end 6 is connected with the phase-locked loop circuit module 9 to supply power for the phase-locked loop circuit module 9, the phase-locked loop circuit module 9 is connected with the infrared induction module 8 and used for receiving induction signals sent by the infrared induction module 8, and the phase-locked loop circuit module 9 is connected with the main control MCU module 7. According to the invention, the problem of easy misoperation during infrared induction can be effectively solved by adding the phase-locked loop circuit module, and the identification rate of infrared induction is effectively improved.
The phase-locked loop circuit module 9 includes a phase-locked loop chip 91 connected with the 5V output end 6, an RC oscillation circuit 92 connected with the phase-locked loop chip 91, a resistor R15 connected with the RC oscillation circuit 92, and a triode Q3, the infrared sensing module 8 includes an infrared sensing head 81 connected with a triode Q3, the phase-locked loop chip 91 is further connected with an output end of the infrared sensing head 81, and the phase-locked loop chip 91 is connected with the main control MCU module 7 through an integral delay loop 94.
The B pole of the triode Q3 is connected with the resistor R15, the C pole of the triode Q3 is connected with the infrared inductive head 81 after being connected with the resistor R16, the resistor R16 is connected with the resistor R17 in parallel, and the E pole of the triode Q3 is connected with the 5V output end 6.
The model of the phase-locked loop chip 91 is LM567, the RT pin of the phase-locked loop chip 91 is connected with the RC oscillating circuit 92, the OUT pin of the phase-locked loop chip 91 is connected with the integral delay loop 94, the V + pin of the phase-locked loop chip 91 is connected with the 5V output end 6, and the IN pin of the phase-locked loop chip 91 is connected with the output end of the infrared induction head 81. The integral delay circuit 94 plays an integral delay role in the circuit, reduces the occurrence of false operation, effectively improves the recognition rate of the infrared induction head, and ensures the working efficiency of the invention.
The integration delay circuit 94 includes a resistor R12 and a capacitor C13 connected in parallel to two ends of the resistor R12, and two ends of the resistor R12 are respectively connected to the phase-locked loop chip 91 and the main control MCU module 7. The resistor R12 and the capacitor C13 play a role in integrating delay in a circuit, and the occurrence of misoperation is reduced.
A diode D1 for preventing reverse connection is connected between the 24V input end 1 and the voltage reduction module 2, the anode of the diode D1 is connected with the 24V input end 1, and the cathode of the diode D1 is connected with the voltage reduction module 2.
The voltage reduction module 2 comprises a voltage reduction chip 21 connected with the cathode of the diode D1, a capacitor C17 and an inductor L3 which are connected with the voltage reduction chip 21, the inductor L3 is connected with the capacitor C19 and then grounded, the inductor L3 is also connected with the electrolytic capacitor C121 and then grounded, the inductor L3 is connected with the 5V output end 6, and the model of the voltage reduction chip 21 is AH 8310C.
The constant current output module 3 comprises a constant current chip 31 and an inductor L2 connected with the constant current chip 31, the inductor L2 is connected with the lamp control interface 5, a diode D2 is connected between the constant current chip 31 and the 24V input end 1, and the model of the constant current chip 31 is MP 2410A.
The main control MCU module 7 comprises a main control MCU chip, and the model of the main control MCU chip is STM8S 003.
The working principle of the invention is as follows: 24V power is input from the 24V input end and enters the buck chip through the diode D1, wherein the diode D1 plays a role in preventing reverse connection. The voltage division sampling is carried out through 1 pin of the voltage reduction chip, 4 pins of the voltage reduction chip after sampling are output through an inductor L3, and power is supplied to a main control MCU chip of the main control MCU module 7 and the phase-locked loop chip 91. After the 4-pin of the pll chip 91 is connected to the voltage, the resistor R15 is connected via the 5-pin of the pll chip 91, and the resistor R14 connected to the 5-pin of the pll chip 91 and the capacitor C14 connected to the 4-pin of the pll chip 91 determine the center frequency of the internal oscillator. The modulated square wave signal is output by the RC oscillating circuit, the signal passes through a resistor R15 to the base of a triode Q3, reaches the transmitting tube of the infrared induction head 81 through a current limiting resistor R16 and a resistor R17, the 3 pin (namely the output end) of the receiving tube in the infrared induction head 81 reaches the 3 pin of the phase-locked loop chip 91 through a capacitor C9 and enters the phase-locked loop chip 91. when an induction signal exists, the phase-locked loop chip 91 amplifies the signal received by the 3 pin and compares the amplified signal with the central frequency, the amplified signal is output through the 8 pin of the phase-locked loop chip 91, and the output pin is connected into the main control MCU chip through a resistor R12 and a capacitor C13, wherein the resistor R12 and the capacitor C13 play a role in integral delay in the circuit, so that the occurrence of false operation is. The 14 pins of the main control MCU chip enter the main control MCU chip, the main control MCU chip identifies the generation of low level through the inside, and the 20 pins of the main control MCU chip output high level, and the MOS tube Q2 in the MOS tube driving module 4 is switched on through the resistor R21, so that the output is controlled to be switched on.
In summary, after the LM567 phase-locked loop circuit module is added in the detection, the signal received by the infrared sensing head is accurately compared with the transmitted signal, and when the frequencies of the two signals are close to each other, the signal is locked and the low level is stably output for the control of the main control MCU module, so that the problem of malfunction easily generated during infrared sensing is effectively solved, and the anti-interference performance of infrared sensing is effectively improved.
It should be understood that the above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention, which is defined by the appended claims.
Claims (8)
1. The utility model provides an anti-interference infrared induction circuit, it includes 24V input (1), step-down module (2) of being connected with 24V input (1), constant current output module (3) of being connected with 24V input (1), MOS pipe drive module (4) of being connected with constant current output module (3), lamp accuse interface (5) of being connected with this MOS pipe drive module (4), 5V output (6) of being connected with step-down module (2), master control MCU module (7) of being connected with this 5V output (6), infrared induction module (8) of being connected with this master control MCU module (7), MOS pipe drive module (4) are connected in order to control this MOS pipe drive module (4) whether to switch on in this master control MCU module (7), this master control MCU module (7) are connected constant current output module (3), its characterized in that: still including phase-locked loop circuit module (9), this 5V output (6) are connected phase-locked loop circuit module (9) and are supplied power for phase-locked loop circuit module (9), and infrared induction module (8) are connected in this phase-locked loop circuit module (9) and are used for the induction signal that interface infrared induction module (8) sent, and this phase-locked loop circuit module (9) are connected master control MCU module (7).
2. The anti-jamming infrared sensing circuit of claim 1, wherein: phase-locked loop circuit module (9) including phase-locked loop chip (91) be connected with 5V output (6), RC oscillating circuit (92) be connected with phase-locked loop chip (91), resistance R15 and triode Q3 be connected with RC oscillating circuit (92), infrared induction module (8) are including infrared induction head (81) be connected with triode Q3, and the output of this infrared induction head (81) is still connected in this phase-locked loop chip (91), and this phase-locked loop chip (91) are connected through integral delay loop (94) master control MCU module (7).
3. The anti-jamming infrared sensing circuit of claim 2, wherein: the B pole of the triode Q3 is connected with the resistor R15, the C pole of the triode Q3 is connected with the infrared induction head (81) after being connected with the resistor R16, the resistor R16 is connected with the resistor R17 in parallel, and the E pole of the triode Q3 is connected with the 5V output end (6).
4. The anti-jamming infrared sensing circuit of claim 2, wherein: the model of phase-locked loop chip (91) is LM567, and RC oscillating circuit (92) is connected to the RT foot of this phase-locked loop chip (91), and the OUT foot of this phase-locked loop chip (91) is connected integral delay circuit (94), and the V + foot and the 5V output (6) of this phase-locked loop chip (91) are connected, and the IN foot and the output of infrared induction head (81) of this phase-locked loop chip (91) are connected.
5. The anti-jamming infrared sensing circuit of claim 2, wherein: the integration delay loop (94) comprises a resistor R12 and a capacitor C13 connected in parallel with two ends of the resistor R12, and two ends of the resistor R12 are respectively connected with the phase-locked loop chip (91) and the main control MCU module (7).
6. An anti-jamming infrared sensing circuit according to any one of claims 1 to 5, characterised in that: a diode D1 for preventing reverse connection is connected between the 24V input end (1) and the voltage reduction module (2), the anode of the diode D1 is connected with the 24V input end (1), and the cathode of the diode D1 is connected with the voltage reduction module (2).
7. The anti-jamming infrared sensing circuit of claim 6, wherein: the voltage reduction module (2) comprises a voltage reduction chip (21) connected with the cathode of the diode D1, a capacitor C17 and an inductor L3, wherein the capacitor C17 and the inductor L3 are connected with the voltage reduction chip (21), the inductor L3 is connected with the capacitor C19 and then grounded, the inductor L3 is also connected with the electrolytic capacitor C121 and then grounded, the inductor L3 is connected with the 5V output end (6), and the model of the voltage reduction chip (21) is AH 8310C.
8. The anti-jamming infrared sensing circuit of claim 6, wherein: the constant current output module (3) comprises a constant current chip (31) and an inductor L2 connected with the constant current chip (31), the inductor L2 is connected with the lamp control interface (5), a diode D2 is connected between the constant current chip (31) and the 24V input end (1), and the model of the constant current chip (31) is MP 2410A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011077744.5A CN112213977A (en) | 2020-10-10 | 2020-10-10 | Anti-interference infrared induction circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011077744.5A CN112213977A (en) | 2020-10-10 | 2020-10-10 | Anti-interference infrared induction circuit |
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| CN112213977A true CN112213977A (en) | 2021-01-12 |
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| CN202011077744.5A Pending CN112213977A (en) | 2020-10-10 | 2020-10-10 | Anti-interference infrared induction circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117792372A (en) * | 2024-02-28 | 2024-03-29 | 广州市品众电子科技有限公司 | Infrared emission chip with constant current drive, cascading system and driving method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE3150347A1 (en) * | 1981-12-18 | 1983-07-14 | Wilhelm Ruf KG, 8000 München | CIRCUIT ARRANGEMENT FOR TRANSMITTING PULSE DISTANCE-MODULATED INFRARED SIGNALS FOR REMOTE CONTROL UNITS |
| KR20010026905A (en) * | 1999-09-09 | 2001-04-06 | 윤종용 | Infrared signal receiver |
| CN202493762U (en) * | 2012-03-20 | 2012-10-17 | 陈秀华 | Novel faucet control device |
| CN204650743U (en) * | 2015-05-08 | 2015-09-16 | 常州信息职业技术学院 | Infrared auto-induction device |
| CN105954762A (en) * | 2016-06-06 | 2016-09-21 | 国网河北省电力公司电力科学研究院 | Superhigh anti-collision apparatus for special operation engineering vehicle for electric power measurement, and alarming method thereof |
| CN206075484U (en) * | 2016-08-31 | 2017-04-05 | 广州丰诺牙科设备有限公司 | A kind of sensing preventer for dental equipment |
| CN109596848A (en) * | 2018-12-21 | 2019-04-09 | 苏州长光华医生物医学工程有限公司 | Reaction cup detects jamproof system and its application method |
| CN210670035U (en) * | 2019-12-02 | 2020-06-02 | 黄冈师范学院 | Anti-interference simplex radio frequency transmitting circuit |
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2020
- 2020-10-10 CN CN202011077744.5A patent/CN112213977A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3150347A1 (en) * | 1981-12-18 | 1983-07-14 | Wilhelm Ruf KG, 8000 München | CIRCUIT ARRANGEMENT FOR TRANSMITTING PULSE DISTANCE-MODULATED INFRARED SIGNALS FOR REMOTE CONTROL UNITS |
| KR20010026905A (en) * | 1999-09-09 | 2001-04-06 | 윤종용 | Infrared signal receiver |
| CN202493762U (en) * | 2012-03-20 | 2012-10-17 | 陈秀华 | Novel faucet control device |
| CN204650743U (en) * | 2015-05-08 | 2015-09-16 | 常州信息职业技术学院 | Infrared auto-induction device |
| CN105954762A (en) * | 2016-06-06 | 2016-09-21 | 国网河北省电力公司电力科学研究院 | Superhigh anti-collision apparatus for special operation engineering vehicle for electric power measurement, and alarming method thereof |
| CN206075484U (en) * | 2016-08-31 | 2017-04-05 | 广州丰诺牙科设备有限公司 | A kind of sensing preventer for dental equipment |
| CN109596848A (en) * | 2018-12-21 | 2019-04-09 | 苏州长光华医生物医学工程有限公司 | Reaction cup detects jamproof system and its application method |
| CN210670035U (en) * | 2019-12-02 | 2020-06-02 | 黄冈师范学院 | Anti-interference simplex radio frequency transmitting circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117792372A (en) * | 2024-02-28 | 2024-03-29 | 广州市品众电子科技有限公司 | Infrared emission chip with constant current drive, cascading system and driving method |
| CN117792372B (en) * | 2024-02-28 | 2024-06-07 | 广州市品众电子科技有限公司 | Infrared emission chip with constant current drive, cascading system and driving method |
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Application publication date: 20210112 |