CN110176921B - Infrared switch circuit with state feedback - Google Patents
Infrared switch circuit with state feedback Download PDFInfo
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- CN110176921B CN110176921B CN201910481576.7A CN201910481576A CN110176921B CN 110176921 B CN110176921 B CN 110176921B CN 201910481576 A CN201910481576 A CN 201910481576A CN 110176921 B CN110176921 B CN 110176921B
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- 239000003990 capacitor Substances 0.000 claims abstract description 11
- 230000000694 effects Effects 0.000 abstract description 4
- 230000001960 triggered effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C23/00—Non-electrical signal transmission systems, e.g. optical systems
- G08C23/04—Non-electrical signal transmission systems, e.g. optical systems using light waves, e.g. infrared
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/567—Circuits characterised by the use of more than one type of semiconductor device, e.g. BIMOS, composite devices such as IGBT
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Selective Calling Equipment (AREA)
- Power-Operated Mechanisms For Wings (AREA)
- Electronic Switches (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
An infrared switch circuit with state feedback comprises a current sensor I1, a voltage comparator U1, two NOT gates U2 and U3, two AND gates U4 and U5, an OR gate U6, a buffer U7, four resistors R1, R3, R4 and R5, a potentiometer R2, a diode D1, an infrared luminous tube D2, an NPN triode Q1 and a capacitor C1; the infrared on-off circuit with the state feedback can clearly judge the on-off state of the controlled equipment, so that an operator can accurately control the controlled equipment, certain convenience is brought to the operator, and certain protection effect is achieved on the controlled equipment.
Description
Technical Field
The invention relates to the technical field of infrared switching on and off, in particular to an infrared switching on and off circuit with state feedback.
Background
In the traditional central control industry, when a controlled device (such as a projector or a television) is turned on or off in an infrared mode, an operator needs to first observe the state of the controlled device and then determine whether to press an infrared emission key, but in many large multimedia exhibition halls, the controlled device is not touched and cannot be seen, so that the operator cannot determine the on or off state of the controlled device, which brings a certain trouble to the operator and also may damage the controlled device due to misoperation.
Disclosure of Invention
The invention aims to provide an infrared on-off circuit with state feedback so as to solve the problems in the background technology, and the circuit is designed through intensive research and repeated experimental improvement and is verified to have very good effect performance on site.
In order to achieve the above purpose, the present invention provides the following technical solutions: an infrared switch circuit with state feedback comprises a current sensor I1, a voltage comparator U1, two NOT gates U2 and U3, two AND gates U4 and U5, an OR gate U6, a buffer U7, four resistors R1, R3, R4 and R5, a potentiometer R2, a diode D1, an infrared luminous tube D2, an NPN triode Q1 and a capacitor C1; still include infrared waveform signal source Input ir wave, the switch on and off parameter Input ir Input of infrared signal, wherein: when the on-off parameter Input ir input=1 of the infrared signal, the Input is a start-up instruction; when the on-off parameter Input ir input=0 of the infrared signal, the Input is a shutdown instruction; the output end of the current sensor I1 is connected with the + terminal of the voltage comparator U1 after being connected in parallel with the resistor R1, the output end of the current sensor I1 is connected with the other terminal of the resistor R1 after being connected in parallel, the-terminal of the voltage comparator U1 is connected with the middle pin of the potentiometer R2, the two terminal pins of the potentiometer R2 are respectively connected with the power supply VCC and the ground, the output end of the voltage comparator U1 is respectively connected with one terminal of the resistor R3 and the capacitor C1 after passing through the diode D1, the other terminal of the resistor R3 and the capacitor C1 is grounded, the output end of the diode D1 is connected with one terminal of the AND gate U4 on the one hand, the output end of the diode D1 is connected with one terminal of the AND gate U5 through the NOT gate U3 on the other hand, the switching machine parameter Input ir of an infrared signal on the other hand is connected with the other terminal of the AND gate U5 through the NOT gate U2, the output end of the AND gate U4 and the output terminal of the AND gate U5 is connected with the Input end of the U6 respectively, the output end of the OR gate U6 is enabled to be connected with one terminal of the three-state buffer U7 and the output end of the NPN-N-P7, the output end of the triode U7 is connected with the base electrode Q1 of the base Q1 of the triode Q1 through the triode Q1, the base Q1 is connected with the base Q1 of the base Q1.
Further, the buffer U7 is a tri-state output four-bus buffer 54S126.
Further, the buffer U7 is a tri-state output four-bus buffer 74S126.
Compared with the prior art, the invention has the beneficial effects that: the infrared on-off circuit with the state feedback can clearly judge the on-off state of the controlled equipment, so that an operator can accurately control the controlled equipment, certain convenience is brought to the operator, and certain protection effect is achieved on the controlled equipment.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the present invention provides a technical solution: an infrared switch circuit with state feedback comprises a current sensor I1, a voltage comparator U1, two NOT gates U2 and U3, two AND gates U4 and U5, an OR gate U6, a buffer U7, four resistors R1, R3, R4 and R5, a potentiometer R2, a diode D1, an infrared luminous tube D2, an NPN triode Q1 and a capacitor C1; still include infrared waveform signal source Input ir wave, the switch on and off parameter Input ir Input of infrared signal, wherein: when the on-off parameter Input ir input=1 of the infrared signal, the Input is a start-up instruction; when the on-off parameter Input ir input=0 of the infrared signal, the Input is a shutdown instruction; the output end of the current sensor I1 is connected with the + terminal of the voltage comparator U1 after being connected in parallel with the resistor R1, the output end of the current sensor I1 is connected with the other terminal of the resistor R1 after being connected in parallel, the-terminal of the voltage comparator U1 is connected with the middle pin of the potentiometer R2, the two terminal pins of the potentiometer R2 are respectively connected with the power supply VCC and the ground, the output end of the voltage comparator U1 is respectively connected with one terminal of the resistor R3 and the capacitor C1 after passing through the diode D1, the other terminal of the resistor R3 and the capacitor C1 is grounded, the output end of the diode D1 is connected with one terminal of the AND gate U4 on the one hand, the output end of the diode D1 is connected with one terminal of the AND gate U5 through the NOT gate U3 on the other hand, the switching machine parameter Input ir of an infrared signal on the other hand is connected with the other terminal of the AND gate U5 through the NOT gate U2, the output end of the AND gate U4 and the output terminal of the AND gate U5 is connected with the Input end of the U6 respectively, the output end of the OR gate U6 is enabled to be connected with one terminal of the three-state buffer U7 and the output end of the NPN-N-P7, the output end of the triode U7 is connected with the base electrode Q1 of the base Q1 of the triode Q1 through the triode Q1, the base Q1 is connected with the base Q1 of the base Q1.
Further, the buffer U7 is a tri-state output four-bus buffer 54S126.
Further, the buffer U7 is a tri-state output four-bus buffer 74S126.
Working principle: the application utilizes the characteristic that the current of the controlled equipment is larger than the current of the controlled equipment when the controlled equipment is started and is shut down, the current sensor I1 measures the current of the controlled equipment in real time, meanwhile, the alternating current signal of the current sensor acts with the resistor R1 to generate an alternating voltage signal, the alternating voltage signal and the adjustable threshold voltage generated by the potentiometer R2 enter the voltage comparator U1 to be compared, and the identification of the on-off state of the controlled equipment is realized through the measurement of the current of the controlled equipment by the current sensor, such as: when the controlled equipment is in a starting state, high current is generated at the moment, high voltage is generated, when the voltage is larger than the threshold voltage generated by the potentiometer R2, the output is high level, the high level charges the capacitor C1 through the diode D1 and rapidly outputs the high level, and the controlled equipment is proved to be in the starting state; the reverse output is low level, and the controlled equipment is in a shutdown state.
(1) When the output is high level, the high point outputs low level through the NOT gate U3, and the low level is input into the AND gate U5 and then outputs low level; at this time, when the on-off parameter Input ir input=1 of the infrared signal, the Input is a start-up instruction; the high level outputs a low level through the NOT gate U2, and the low level is input into the AND gate U4 and then outputs a low level; u4 and U5 are low level, or gate U6 outputs low level, the low level enters the tri-state allowing end of buffer U7, the tri-state allowing end is effective, when the tri-state allowing end is low level, the output is ineffective, NPN triode Q1 is cut off, at the moment, the state is in high resistance, and the action of infrared luminotron D2 can not be triggered. Therefore, when the controlled device is in the starting-up state, the input is a starting-up instruction, and the controlled device is still in the starting-up state.
(2) When the output is high level, the high point outputs low level through the NOT gate U3, and the low level is input into the AND gate U5 and then outputs low level; at this time, when the on-off parameter Input ir input=0 of the infrared signal, the Input is a shutdown instruction; the low level outputs high level through the NOT gate U2, and the two high levels are input into the AND gate U4 and then output high level; the high level of U4 enters the OR gate U6 and is output as the high level, the high level enters the tri-state allowing end of the buffer U7, the tri-state allowing end is effective as the high level, the output end of the buffer U7 is consistent with the input end of the infrared waveform signal source input ir wave, when the input end of the infrared waveform signal source input ir wave is high level, the NPN triode Q1 is conducted, the infrared luminous tube D2 is triggered to act, and the controlled equipment is shut down. Therefore, when the controlled device is in the on state, the input is an off command, and the controlled device is turned off.
And (3) when the controlled equipment is in a shutdown state, inputting a shutdown instruction, and shutting down the controlled equipment.
And (4) when the controlled equipment is in a power-off state, inputting a power-on instruction, and powering on the controlled equipment.
According to the analysis of the condition in the step 4, the on-off state of the controlled equipment can be clearly judged by the infrared on-off circuit with the state feedback, an operator can accurately control the controlled equipment, certain convenience is brought to the operator, and certain protection effect is achieved on the controlled equipment.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. An infrared switch circuit with state feedback, which is characterized in that: the device comprises a current sensor I1, a voltage comparator U1, two NOT gates U2 and U3, two AND gates U4 and U5, an OR gate U6, a buffer U7, four resistors R1, R3, R4 and R5, a potentiometer R2, a diode D1, an infrared luminous tube D2, an NPN triode Q1 and a capacitor C1; still include infrared waveform signal source Input ir wave, the switch on and off parameter Input ir Input of infrared signal, wherein: when the on-off parameter Input ir input=1 of the infrared signal, the Input is a start-up instruction; when the on-off parameter Input ir input=0 of the infrared signal, the Input is a shutdown instruction; the output end of the current sensor I1 is connected with the + terminal of the voltage comparator U1 after being connected in parallel with the resistor R1, the output end of the current sensor I1 is connected with the other terminal of the resistor R1 after being connected in parallel, the-terminal of the voltage comparator U1 is connected with the middle pin of the potentiometer R2, the two terminal pins of the potentiometer R2 are respectively connected with the power supply VCC and the ground, the output end of the voltage comparator U1 is respectively connected with one terminal of the resistor R3 and the capacitor C1 after passing through the diode D1, the other terminal of the resistor R3 and the capacitor C1 is grounded, the output end of the diode D1 is connected with one terminal of the AND gate U4 on the one hand, the output end of the diode D1 is connected with one terminal of the AND gate U5 through the NOT gate U3 on the other hand, the switching machine parameter Input ir of an infrared signal on the other hand is connected with the other terminal of the AND gate U5 through the NOT gate U2, the output end of the AND gate U4 and the output terminal of the AND gate U5 is connected with the Input end of the U6 respectively, the output end of the OR gate U6 is enabled to be connected with one terminal of the three-state buffer U7 and the output end of the NPN-N-P7, the output end of the triode U7 is connected with the base electrode Q1 of the base Q1 of the triode Q1 through the triode Q1, the base Q1 is connected with the base Q1 of the base Q1.
2. The infrared switch-on and switch-off circuit with status feedback of claim 1, wherein: the buffer U7 is a tri-state output four-bus buffer 54S126.
3. The infrared switch-on and switch-off circuit with status feedback of claim 1, wherein: the buffer U7 is a tri-state output four-bus buffer 74S126.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910481576.7A CN110176921B (en) | 2019-06-04 | 2019-06-04 | Infrared switch circuit with state feedback |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910481576.7A CN110176921B (en) | 2019-06-04 | 2019-06-04 | Infrared switch circuit with state feedback |
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| Publication Number | Publication Date |
|---|---|
| CN110176921A CN110176921A (en) | 2019-08-27 |
| CN110176921B true CN110176921B (en) | 2024-08-02 |
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| CN201910481576.7A Active CN110176921B (en) | 2019-06-04 | 2019-06-04 | Infrared switch circuit with state feedback |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209844934U (en) * | 2019-06-04 | 2019-12-24 | 沈阳秀展科技有限公司 | Infrared startup and shutdown circuit with state feedback |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100312941B1 (en) * | 1998-12-15 | 2002-02-28 | 김영환 | Current Comparator |
| US6917188B2 (en) * | 2002-11-14 | 2005-07-12 | Fyre Storm, Inc. | Power converter circuitry and method |
| CN106532631B (en) * | 2016-11-15 | 2017-11-24 | 深圳市航天新源科技有限公司 | A kind of space flight is booted with N MOS flash and drives current-limiting protection circuit |
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| CN209844934U (en) * | 2019-06-04 | 2019-12-24 | 沈阳秀展科技有限公司 | Infrared startup and shutdown circuit with state feedback |
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| CN110176921A (en) | 2019-08-27 |
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