CN210510445U - Infrared switch control circuit based on timer adjustment - Google Patents
Infrared switch control circuit based on timer adjustment Download PDFInfo
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- CN210510445U CN210510445U CN201921404895.XU CN201921404895U CN210510445U CN 210510445 U CN210510445 U CN 210510445U CN 201921404895 U CN201921404895 U CN 201921404895U CN 210510445 U CN210510445 U CN 210510445U
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Abstract
The utility model discloses an infrared switch control circuit based on timer is adjusted, including object detection module, trigger module, switch module and power conversion module, object detection module, trigger module and switch module connect gradually, object detection module and trigger module all are connected with power conversion module, infrared receiving diode's positive pole is connected with the reverse input of comparator, the activity regulation end of first resistance regulator is connected with the forward input of comparator, the output of comparator is connected with the trigger input of 555 timer, the output of 555 timer is connected with the base of first triode, the second coil pin of relay is connected with the collecting electrode of first triode, the other end of first resistance, the other end of second resistance, the other end of first resistance regulator and the projecting pole of first triode all are connected with the reference ground. The utility model provides an infrared switch control circuit based on timer is adjusted, the circuit can be accurate according to sheltering from of external object and carry out on-off control, has avoided the interference well.
Description
Technical Field
The utility model relates to a circuit field, in particular to infrared switch control circuit based on timer is adjusted.
Background
Along with the rapid development of social economy, the faucet industry is well popularized and applied; the existing water taps are generally divided into a touch type water tap and an induction type water tap, the touch type water tap is easy to cause the propagation and infection of bacteria, and the touch type water tap is gradually replaced by the induction type water tap, particularly in some public places; the circuit signal of the existing induction type faucet is unstable and is easy to be interfered.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide an infrared switch control circuit based on timer adjustment, the circuit can be accurate according to sheltering from of external object and carry out on-off control, has avoided the interference well.
The utility model provides a technical scheme that its problem adopted is:
the utility model provides an infrared switch control circuit based on timer adjustment, including object detection module, trigger module, switch module and power conversion module, object detection module, trigger module and switch module connect gradually, object detection module with trigger module all with power conversion module connects, object detection module includes first resistance, second resistance, infrared emitting diode, can receive the infrared ray that infrared emitting diode sent, trigger module includes comparator, 555 timer and first resistance regulator, power conversion module includes three-terminal integrated regulator, switch module includes relay and first triode, the input of three-terminal integrated regulator and the first coil pin of relay are connected with the input power positive pole, the utility model discloses a three-terminal integrated voltage stabilizer, including infrared emitting diode's positive pole, infrared receiving diode's negative pole, first resistance regulator's one end with 555 timer's reset end all with the output of three-terminal integrated voltage stabilizer is connected, the one end of first resistance with infrared emitting diode's negative pole is connected, the one end of second resistance with infrared receiving diode's positive pole is connected, infrared receiving diode's positive pole still with the reverse input end of comparator is connected, the activity regulation end of first resistance regulator with the forward input of comparator is connected, the output of comparator with 555 timer's trigger input end is connected, the output of 555 timer with the base of first triode is connected, the second coil pin of relay with the collecting electrode of first triode is connected, the other end of first resistance, The other end of the second resistor, the other end of the first resistor regulator and the emitting electrode of the first triode are all connected with reference ground.
Further, the trigger module includes fourth resistance, second resistance regulator, first electric capacity and second electric capacity, the one end of fourth resistance with the output of three-terminal integrated voltage regulator is connected, the activity regulation end of second resistance regulator and wherein one end all with the other end of fourth resistance is connected, the positive pole of first electric capacity the discharge end and the threshold value end of 555 timer all with the other end of second resistance regulator is connected, the one end of second electric capacity with the control end of 555 timer is connected, the negative pole of first electric capacity with the other end of second electric capacity all is connected with reference ground.
Furthermore, the power conversion module further comprises a third capacitor and a fourth capacitor, the anode of the third capacitor and one end of the fourth capacitor are both connected with the output end of the three-terminal integrated voltage stabilizer, and the cathode of the third capacitor and the other end of the fourth capacitor are both connected with a reference ground.
Further, the switch module further comprises a third diode, the cathode of the third diode is connected with the first coil pin of the relay, and the anode of the third diode is connected with the second coil pin of the relay.
Further, the model of the comparator is LM 393.
Further, the model of the three-terminal integrated voltage regulator is 78L 05.
The utility model provides an embodiment has following beneficial effect at least: an infrared emitting diode in the object detection module emits an infrared signal outwards, and when no object blocks the infrared signal, an infrared receiving diode is in a cut-off state, and a comparator in the trigger module outputs a high level; because the output end of the comparator is connected with the trigger input end of the 555 timer and the trigger input end of the 555 timer can enable the 555 timer to run only when receiving low level, the output end of the 555 timer does not output, and the base electrode of the first triode is connected with the output end of the 555 timer, so that the first triode is in a cut-off state, no current flows through a coil of the relay, and a normally open contact of the relay keeps a disconnected state, so that the switch is in a disconnected state; the three-terminal integrated voltage stabilizer of the power conversion module is used for converting input voltage into voltage suitable for the comparator and the 555 timer to work; when an object blocks an infrared signal sent by the infrared emitting diode, the infrared receiving diode is conducted, the comparator outputs a low level, the 555 timer enters a working state and outputs a high level, the first triode is converted into a saturated conduction state from a cut-off state, a coil of the relay passes current, and a normally open contact of the relay is closed, so that the switch is in a closed state; the infrared ray is used for detecting whether an object is close to the outside, the detection is accurate and simple, the circuit performance is stable, and the outside interference is well prevented; the circuit is applied to the induction type faucet, is sanitary, and can well solve the problem of water resource waste caused by external interference.
Drawings
The invention is further described with reference to the following figures and examples.
Fig. 1 is a schematic circuit block diagram of an infrared switch control circuit based on timer adjustment according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of an infrared switch control circuit based on timer adjustment according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
It should be noted that, if there is no conflict, various features in the embodiments of the present invention may be combined with each other, and all of them are within the scope of the present invention. Additionally, while functional block divisions are performed in apparatus schematics, with logical sequences shown in flowcharts, in some cases, steps shown or described may be performed in sequences other than block divisions in apparatus or flowcharts.
Along with the rapid development of social economy, the faucet industry is well popularized and applied; the existing water taps are generally divided into a touch type water tap and an induction type water tap, the touch type water tap is easy to cause the propagation and infection of bacteria, and the touch type water tap is gradually replaced by the induction type water tap, particularly in some public places; the circuit signal of the existing induction type faucet is unstable and is easy to be interfered.
Based on this, the utility model provides an infrared switch control circuit based on timer is adjusted, the circuit can be accurate according to sheltering from of external object and carry out on-off control, has avoided the interference well.
The embodiments of the present invention will be further explained with reference to the drawings.
Referring to fig. 1-2, an embodiment of the present invention provides an infrared switch control circuit based on timer adjustment, including an object detection module 100, a trigger module 200, a switch module 300 and a power conversion module 400, the object detection module 100, the trigger module 200 and the switch module 300 are sequentially connected, the object detection module 100 and the trigger module 200 are both connected to the power conversion module 400, the object detection module 100 includes a first resistor R1, a second resistor R2, an infrared emitting diode D1, and an infrared receiving diode D2 capable of receiving infrared rays emitted by the infrared emitting diode D1, the trigger module 200 includes a comparator IC1, a 555 timer IC2 and a first resistor adjuster RP1, the power conversion module 400 includes a three-terminal integrated regulator IC3, the switch module 300 includes a relay K1 and a first triode Q1, an input terminal of the three-terminal integrated regulator IC3 and a first coil pin of the relay K1 are connected to an input power source anode, the anode of the infrared emitting diode D1, the cathode of the infrared receiving diode D2, one end of the first resistance regulator RP1 and the reset end of the 555 timer IC2 are all connected with the output end of the three-terminal integrated voltage regulator IC3, one end of the first resistor R1 is connected to the cathode of the ir-emitting diode D1, one end of the second resistor R2 is connected to the anode of the ir-receiving diode D2, the anode of the ir-receiving diode D2 is further connected to the reverse input terminal of the comparator IC1, the active adjustment terminal of the first resistor regulator RP1 is connected to the forward input terminal of the comparator IC1, the output terminal of the comparator IC1 is connected to the trigger input terminal of the 555 timer IC2, the output terminal of the 555 timer IC2 is connected to the base of the first transistor Q1, the second coil pin of the relay K1 is connected to the collector of the first transistor Q1, and the other ends of the first resistor R1, the second resistor R2, the first resistor regulator RP1 and the emitter of the first transistor Q1 are all connected to the reference ground. The infrared emitting diode D1 in the object detection module 100 emits an infrared signal, and when no object blocks the infrared signal, the infrared receiving diode D2 is in a cut-off state, and the comparator IC1 in the trigger module 200 outputs a high level; because the output end of the comparator IC1 is connected with the trigger input end of the 555 timer IC2 and the trigger input end of the 555 timer IC2 enables the 555 timer IC2 to operate only when receiving a low level, the output end of the 555 timer IC2 does not output, the base of the first triode Q1 is connected with the output end of the 555 timer IC2, so the first triode Q1 is in a cut-off state, no current flows through the coil of the relay K1, and the normally-open contact of the relay K1 is kept in a cut-off state, so that the switch is in a cut-off state; the three-terminal integrated voltage regulator IC3 of the power conversion module 400 is used for converting an input voltage into a voltage suitable for the operation of the comparator IC1 and the 555 timer IC 2; when an object blocks an infrared signal sent by the infrared emitting diode D1, the infrared receiving diode D2 is switched on, the comparator IC1 outputs a low level, the 555 timer IC2 enters a working state and outputs a high level, the first triode Q1 is switched to a saturation conducting state from a cut-off state, a coil of the relay K1 has current passing through, and a normally open contact of the relay K1 is closed, so that the switch is in a closed state; the infrared ray is used for detecting whether an object is close to the outside, the detection is accurate and simple, the circuit performance is stable, and the outside interference is well prevented; the circuit is applied to the induction type faucet, is sanitary, and can well solve the problem of water resource waste caused by external interference.
The trigger module 200 includes a fourth resistor R4, a second resistor R2, a first capacitor C1 and a second capacitor C2, one end of the fourth resistor R4 is connected to an output end of the three-terminal integrated regulator IC3, an active regulation end and one end of the second resistor R2 are both connected to the other end of the fourth resistor R4, an anode of the first capacitor C1, a discharge end and a threshold end of the 555 timer IC2 are both connected to the other end of the second resistor regulator RP2, one end of the second capacitor C2 is connected to a control end of the 555 timer IC2, and a cathode of the first capacitor C1 and the other end of the second capacitor C2 are both connected to a reference ground. When the 555 timer IC2 works, the first capacitor C1 is charged, after a period of time delay, the output end of the 555 timer IC2 outputs a low level again, the first triode Q1 is restored to a cut-off state, no current passes through the coil of the relay K1, the normally open contact of the relay K1 is disconnected, and the normally open contact is restored to a switch-off state again; the second resistance adjuster is adjusted to change the corresponding delay time.
Further, the power conversion module 400 further includes a third capacitor C3 and a fourth capacitor C4, an anode of the third capacitor C3 and one end of the fourth capacitor C4 are both connected to the output terminal of the three-terminal integrated regulator IC3, and a cathode of the third capacitor C3 and the other end of the fourth capacitor C4 are both connected to the reference ground. The third capacitor C3 and the fourth capacitor C4 can improve the stability of the output voltage of the three-terminal integrated regulator IC 3.
Further, the switch module 300 further includes a third diode D3, a cathode of the third diode D3 is connected to the first coil pin of the relay K1, and an anode of the third diode D3 is connected to the second coil pin of the relay K1. The model number of the third diode D3 is 1N4148, 1N4148 is a small-sized high-speed switch diode, the switch is relatively quick, and the diode is widely used for unidirectional conduction and isolation of circuits with higher signal frequency, communication, computer boards, television circuits and industrial control circuits.
Further, comparator IC1 is model LM 393. LM393 is a dual voltage comparator integrated device. The output can be used as a simple open circuit to ground, when the limit current is reached, the output transistor will exit and the output voltage will rise quickly; LM393 is a high gain, wide band device.
Further, the model of the three-terminal integrated voltage regulator IC3 is 78L 05. 78L05 is a fixed voltage three terminal integrated regulator, and is suitable for many applications. Its excellent internal current limiting and thermal shutdown characteristics make it particularly suitable for overload conditions, where the output impedance is effectively improved, but the bias current is greatly reduced when used in place of a conventional zener diode-resistor bank.
While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention defined by the appended claims.
Claims (6)
1. The utility model provides an infrared switch control circuit based on timer adjustment which characterized in that: the device comprises an object detection module (100), a trigger module (200), a switch module (300) and a power conversion module (400), wherein the object detection module (100), the trigger module (200) and the switch module (300) are sequentially connected, the object detection module (100) and the trigger module (200) are connected with the power conversion module (400), the object detection module (100) comprises a first resistor, a second resistor, an infrared emitting diode and an infrared receiving diode capable of receiving infrared rays emitted by the infrared emitting diode, the trigger module (200) comprises a comparator, a 555 timer and a first resistor regulator, the power conversion module (400) comprises a three-terminal integrated voltage stabilizer, the switch module (300) comprises a relay and a first triode, the input end of the three-terminal integrated voltage stabilizer and a first coil pin of the relay are connected with the anode of an input power supply, the utility model discloses a three-terminal integrated voltage stabilizer, including infrared emitting diode's positive pole, infrared receiving diode's negative pole, first resistance regulator's one end with 555 timer's reset end all with the output of three-terminal integrated voltage stabilizer is connected, the one end of first resistance with infrared emitting diode's negative pole is connected, the one end of second resistance with infrared receiving diode's positive pole is connected, infrared receiving diode's positive pole still with the reverse input end of comparator is connected, the activity regulation end of first resistance regulator with the forward input of comparator is connected, the output of comparator with 555 timer's trigger input end is connected, the output of 555 timer with the base of first triode is connected, the second coil pin of relay with the collecting electrode of first triode is connected, the other end of first resistance, The other end of the second resistor, the other end of the first resistor regulator and the emitting electrode of the first triode are all connected with reference ground.
2. The infrared switch control circuit based on timer adjustment of claim 1, characterized in that: trigger module (200) include fourth resistance, second resistance regulator, first electric capacity and second electric capacity, the one end of fourth resistance with the output of three-terminal integrated voltage regulator is connected, the activity regulation end of second resistance regulator and wherein one end all with the other end of fourth resistance is connected, the positive pole of first electric capacity the discharge end and the threshold value end of 555 timer all with the other end of second resistance regulator is connected, the one end of second electric capacity with the control end of 555 timer is connected, the negative pole of first electric capacity with the other end of second electric capacity all is connected with reference ground.
3. The infrared switch control circuit based on timer adjustment of claim 1, characterized in that: the power supply conversion module (400) further comprises a third capacitor and a fourth capacitor, the anode of the third capacitor and one end of the fourth capacitor are both connected with the output end of the three-terminal integrated voltage stabilizer, and the cathode of the third capacitor and the other end of the fourth capacitor are both connected with a reference ground.
4. The infrared switch control circuit based on timer adjustment of claim 1, characterized in that: the switch module (300) further comprises a third diode, the negative electrode of the third diode is connected with the first coil pin of the relay, and the positive electrode of the third diode is connected with the second coil pin of the relay.
5. The infrared switch control circuit based on timer adjustment of claim 1, characterized in that: the model of the comparator is LM 393.
6. The infrared switch control circuit based on timer adjustment of claim 1, characterized in that: the model of the three-terminal integrated voltage regulator is 78L 05.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921404895.XU CN210510445U (en) | 2019-08-27 | 2019-08-27 | Infrared switch control circuit based on timer adjustment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921404895.XU CN210510445U (en) | 2019-08-27 | 2019-08-27 | Infrared switch control circuit based on timer adjustment |
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| CN210510445U true CN210510445U (en) | 2020-05-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113983223A (en) * | 2020-07-27 | 2022-01-28 | 云米互联科技(广东)有限公司 | Touch type water tap |
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2019
- 2019-08-27 CN CN201921404895.XU patent/CN210510445U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113983223A (en) * | 2020-07-27 | 2022-01-28 | 云米互联科技(广东)有限公司 | Touch type water tap |
| CN113983223B (en) * | 2020-07-27 | 2023-07-21 | 云米互联科技(广东)有限公司 | Touch type tap |
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Address after: Room 4120 and 4121, building 2, Jiangmen Wanda Plaza, Pengjiang district, Jiangmen City, Guangdong Province Patentee after: Jiangmen Jiaquan Intellectual Property Operation Co., Ltd Address before: Room 4120 and 4121, building 2, Jiangmen Wanda Plaza, Pengjiang district, Jiangmen City, Guangdong Province Patentee before: Jiangmen Jiaquan Technology Information Consulting Co.,Ltd. |
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