CN214544881U - Time delay control circuit - Google Patents
Time delay control circuit Download PDFInfo
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- CN214544881U CN214544881U CN202120605137.5U CN202120605137U CN214544881U CN 214544881 U CN214544881 U CN 214544881U CN 202120605137 U CN202120605137 U CN 202120605137U CN 214544881 U CN214544881 U CN 214544881U
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- type triode
- infrared sensor
- pyroelectric infrared
- room
- control circuit
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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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Abstract
The utility model relates to a time delay control circuit relates to time delay circuit's field, it includes detecting element, output first detected signal when detection personnel are located the room, output second detected signal when detection personnel do not are located the room, execution unit, connect in detecting element, respond to first detected signal and throw light on to the room, time delay shutoff unit, connect in execution unit, respond to the second detected signal and make execution unit continue to light the preset time quantum, execution unit lights and cuts off after the preset time quantum. The lamp has the effect of automatically extinguishing the lamp after people leave a room for a long time.
Description
Technical Field
The present application relates to the field of delay circuits, and more particularly, to a delay control circuit.
Background
The lamp can be installed in a room to illuminate the room, the existing lamp simply achieves the illumination effect, and when people go out of the room and forget to turn off the lamp, the waste of electric energy is easily caused.
SUMMERY OF THE UTILITY MODEL
In order to reduce the waste of electric energy, the application provides a time delay control circuit.
The application provides a delay control circuit adopts following technical scheme:
a delay control circuit, comprising:
the detection unit outputs a first detection signal when a detection person is located in a room, and outputs a second detection signal when the detection person is not located in the room;
the execution unit is connected with the detection unit, responds to the first detection signal and illuminates the room;
and the delay turn-off unit is connected with the execution unit, responds to the second detection signal and enables the execution unit to continuously illuminate the preset time period, and the execution unit is turned off after illuminating the preset time period.
By adopting the technical scheme, the detection unit outputs the first detection signal when detecting that the personnel is located in the room, the execution unit illuminates the room after responding to the first detection signal, when the personnel leaves the room, the detection unit outputs the second detection signal, the delay turn-off unit responds to the second detection signal and starts to continuously illuminate the preset time period, when the personnel returns to the room again in the delay time period, the execution unit always illuminates, when the personnel does not return to the room after the delay time, the execution unit is turned off, and the effect of saving electric energy is achieved.
Optionally, the detection unit includes a pyroelectric infrared sensor P1, a power supply input end of the pyroelectric infrared sensor P1 is connected to a power supply VCC, and a power supply output end of the pyroelectric infrared sensor P1 is grounded;
the pyroelectric infrared sensor P1 outputs a first detection signal with high level when detecting that a person is in a room; the pyroelectric infrared sensor P1 outputs a second detection signal of low level when detecting that a person is not present in the room.
Through adopting above-mentioned technical scheme, the first detected signal of output when pyroelectric infrared sensor P1 detected personnel and passed through the door, personnel export the second detected signal behind the door, use pyroelectric infrared sensor P1 more be convenient for detect personnel whether pass through the door.
Optionally, the execution unit includes an NPN-type transistor Q1 and an LED lamp L1; the base electrode of the NPN type triode Q1 is connected with the signal output end of the pyroelectric infrared sensor P1, the collector electrode of the NPN type triode Q1 is connected with a power supply VCC, the emitter electrode of the NPN type triode Q1 is grounded, and the LED lamp L1 is connected between the collector electrode of the NPN type triode Q1 and the power supply VCC in series;
the base of the NPN transistor Q1 responds to the first detection signal, the NPN transistor Q1 is turned on, and the LED lamp L1 lights up after the NPN transistor Q1 is turned on.
By adopting the technical scheme, when a person is in a room, the base electrode of the NPN type triode Q1 responds to the first detection signal, the NPN type triode Q1 is conducted, and the LED lamp L1 is turned on to illuminate.
Optionally, the delay turn-off unit includes a PNP type triode Q2 and a relay KM 1; the base electrode of the PNP type triode Q2 is connected with the signal output end of the pyroelectric infrared sensor P1, the emitter electrode of the PNP type triode Q2 is connected with a power supply VCC, and the collector electrode of the PNP type triode Q2 is grounded;
the time-delay turn-off unit further comprises a first capacitor C1 and a first resistor R1; one end of the first capacitor C1 is connected with a power supply VCC, and the other end is grounded; a coil of the relay KM1 is connected in series between an emitter of the PNP triode Q2 and a power supply VCC, and a normally closed contact of the relay KM1 is connected in series between the power supply VCC and a first capacitor C1; one end of the first resistor R1 is connected with a connection node between the base electrode of the NPN type triode Q1 and the signal output end of the pyroelectric sensor P1, and the other end of the first resistor R1 is grounded;
and a connecting node between the base electrode of the PNP type triode Q1 and the first resistor R1 is connected with a lead, and when the normally closed contact of the relay KM1 is disconnected, one end of the first capacitor C1 is connected with the base electrode of the PNP type triode Q1 through the lead.
By adopting the technical scheme, when a person leaves a room, the base of the PNP type triode Q2 responds to a second detection signal, the PNP type triode Q2 is conducted, the coil of the relay KM1 is electrified, the normally closed contact of the relay KM1 is disconnected, the first capacitor C1 is connected with the base of the NPN type triode Q1, the base point of the NPN type triode Q1 is pulled high by the first capacitor C1, the NPN type triode Q1 is conducted, the LED lamp L1 is lightened, the first capacitor C1 is gradually discharged through the first resistor R1, after the electric charge in the first capacitor C1 is exhausted, the NPN type triode Q1 is disconnected, and the LED lamp L1 is extinguished, so that the time delay effect is achieved.
Optionally, a current limiting resistor R2 is connected in series between the emitter of the NPN transistor Q1 and the ground terminal.
By adopting the technical scheme, the current limiting resistor R2 limits the current flowing between the collector and the emitter of the NPN type triode Q1, so that the NPN type triode Q1 is not easy to be damaged.
Optionally, a second capacitor C2 is connected to the pyroelectric infrared sensor P1; one end of the first capacitor C1 is connected to the signal output end of the pyroelectric infrared sensor P1, and the other end of the first capacitor C1 is grounded; the pyroelectric infrared sensor P1 is also connected with a second capacitor C2.
By adopting the technical scheme, the second capacitor C2 filters high-frequency interference signals generated when the pyroelectric infrared sensor P1 works, and the signal quality output by the signal output end of the pyroelectric infrared sensor P1 is improved.
Optionally, a pull-down resistor R3 is connected to the pyroelectric infrared sensor P1; one end of the pull-down resistor R3 is connected with the signal output end of the pyroelectric infrared sensor P1, and the other end is grounded.
Through adopting above-mentioned technical scheme, pull-down resistor R3 has improved the anti-jamming effect of pyroelectric infrared sensor P1 signal output end.
Optionally, a freewheeling diode L2 is connected in parallel to two ends of the coil of the relay KM 1.
By adopting the technical scheme, the freewheeling diode prevents voltage and current in the circuit from suddenly changing, and provides a power consumption path for the reverse electromotive force. The coil provides continuous current for the load through the coil, so that the load current is prevented from suddenly changing, and the effect of smoothing the current is achieved.
In summary, the present application includes at least one of the following beneficial technical effects:
1. when the detection unit detects that a person is in the room, a first detection signal is output, the execution unit illuminates the room after responding to the first detection signal, when the person leaves the room, the detection unit outputs a second detection signal, the delay turn-off unit responds to the second detection signal and starts to continuously illuminate a preset time period, when the person returns to the room again within the delay time period, the execution unit always illuminates, and when the person does not return to the room after the delay time, the execution unit is turned off, so that the effect of saving electric energy is achieved;
2. when a person leaves a room, the base of the PNP triode Q2 responds to a second detection signal, the PNP triode Q2 is turned on, the coil of the relay KM1 is energized, the normally closed contact of the relay KM1 is opened, the first capacitor C1 is connected with the base of the NPN triode Q1, the base point of the NPN triode Q1 is pulled high by the first capacitor C1, the NPN triode Q1 is turned on, the LED lamp L1 is turned on, the first capacitor C1 is gradually discharged through the first resistor R1, the NPN triode Q1 is turned off after the charge in the first capacitor C1 is exhausted, and the LED lamp L1 is turned off, so that the time delay effect is achieved.
Drawings
Fig. 1 is a circuit diagram of a delay control circuit according to an embodiment of the present application.
Description of reference numerals: 1. a detection unit; 2. an execution unit; 3. and a delay turn-off unit.
Detailed Description
The present application is described in further detail below with reference to the attached drawings.
The embodiment of the application discloses a delay control circuit.
Referring to fig. 1, a delay control circuit includes a detection unit 1, an execution unit 2, and a delay shutdown unit 3. The detection unit 1 outputs a first detection signal when detecting that a person is present in the room, and the detection unit 1 outputs a second detection signal when detecting that a person is not present in the room. The execution unit 2 responds to the first detection signal and then illuminates the room, the delayed turn-off unit 3 responds to the second detection signal and enables the execution unit 2 to illuminate the room in a delayed mode for a preset time period, when the personnel return to the room within the preset time period, the execution unit 2 continues to illuminate the room, and when the personnel do not return to the room within the preset time period, the execution unit 2 is turned off after the preset time period of delayed illumination, and therefore the effect of saving electric energy is achieved.
Referring to fig. 1, the sensing unit 1 includes a pyroelectric infrared sensor P1, the pyroelectric infrared sensor P1 is installed in a room to be able to detect a position where a person is located in the room, the pyroelectric infrared sensor P1 detects that the person is located in the room, the pyroelectric infrared sensor P1 outputs a first sensing signal of a high level, and when the person leaves the room, the pyroelectric infrared sensor P1 does not sense the person and outputs a second sensing signal of a low level.
Referring to fig. 1, the actuator 2 includes an NPN transistor Q1 and an LED lamp L1. The signal output end of the pyroelectric infrared sensor P1 is connected with the base electrode of an NPN type triode Q1, the collector electrode of the NPN type triode Q1 is connected with a power supply VCC through a conducting wire, the emitting electrode of the NPN type triode Q1 is grounded, and the LED lamp L1 is connected between the collector electrode of the NPN type triode Q1 and the power supply VCC in series.
When a person is in a room, the pyroelectric infrared sensor P1 outputs a first detection signal, the base of the NPN type triode Q1 responds to the first detection signal, the NPN type triode Q1 is conducted, the LED lamp L1 has current to pass through and is lighted, and the LED lamp L1 is lighted to illuminate the room.
Referring to fig. 1, the delay shut-off unit 3 includes a PNP type transistor Q2, a relay KM1, a first capacitor C1, and a first resistor R1. The base electrode of the PNP type triode Q2 is connected to the signal output end of the pyroelectric infrared sensor P1, the emitting electrode of the PNP type triode Q2 is connected with a power supply VCC, and the collecting electrode of the PNP type triode Q2 is grounded. The coil of the relay KM1 is connected in series between a power supply VCC and an emitter of the PNP type triode Q2, a positive plate of a first capacitor C1 is connected with the power supply VCC, a negative plate of the first capacitor C1 is grounded, one end of a first resistor R1 is connected to a connection node between a signal output end of the pyroelectric sensor P1 and a base of the NPN type triode Q1, and the other end of the first resistor R1 is grounded. The normally closed contact of the relay KM1 is connected in series between the power supply VCC and the first capacitor C1, and when the normally closed contact of the relay KM1 is opened, the first capacitor C1 is connected with the base of the NPN type triode Q1.
The power VCC charges first capacitor C1, and when personnel left the room, pyroelectric infrared sensor P1 exported the second detection signal of low level, and PNP type triode Q2's base responds to the second detection signal, and PNP type triode Q2 switches on, and relay KM 1's coil circular telegram, the normally closed contact disconnection of relay KM 1. After the normally closed contact of the relay KM1 is disconnected, the fully charged first capacitor C1 is connected with the base electrode of the NPN type triode Q1 through a conducting wire, the base electrode potential of the NPN type triode Q1 is pulled high, the NPN type triode Q1 is conducted for a period of time in a delayed mode, the LED lamp L1 continuously emits light for a period of time in a delayed mode, when the charge in the first capacitor C1 is exhausted through the first resistor R1, the NPN type triode Q1 is disconnected, and the LED lamp L1 is extinguished.
When a person returns to a room within the time delay light-emitting time of the LED lamp L1, the pyroelectric infrared sensor P1 detects that the person enters the room again and outputs a first detection signal, the LED lamp L1 is continuously turned on, and when the person does not return to the room within the time delay light-emitting time of the LED lamp L1, the LED lamp L1 is turned off, so that the energy-saving effect is achieved.
The first resistor R1 in this embodiment is a resistor with a fixed resistance value, and in other embodiments, the first resistor R1 may also be a slide rheostat, and the time duration of the delayed light emission of the LED lamp L1 can be changed by changing the resistance value of the slide rheostat.
Referring to fig. 1, in order to make the NPN transistor Q1 less susceptible to damage, a current limiting resistor R2 is connected in series between the emitter and the ground of the NPN transistor Q1, and the current limiting resistor R2 limits a current flowing between the collector and the emitter of the NPN transistor Q1 when the NPN transistor Q1 is turned on, thereby making the NPN transistor Q1 less susceptible to damage.
Referring to fig. 1, in order to improve the quality of the signal output from the pyroelectric infrared sensor P1, a second capacitor C2 is connected to the signal output terminal of the pyroelectric infrared sensor P1, and the second capacitor C2 is connected to the signal output terminal of the pyroelectric infrared sensor P1 and then grounded. The second capacitor C2 filters high-frequency interference signals generated in the detection process of the pyroelectric infrared sensor P1, and therefore the quality of signals output by the signal output end of the pyroelectric infrared sensor P1 is improved.
Referring to fig. 1, in order to stabilize the signal output by the pyroelectric infrared sensor P1, a pull-down resistor R3 is connected to a signal output end of the pyroelectric infrared sensor P1 through a wire, and the pull-down resistor R3 is connected to a signal output end of the pyroelectric infrared sensor P1 and then grounded. The pull-down resistor R3 makes the signal output by the pyroelectric infrared sensor P1 more stable.
The implementation principle of the delay control circuit in the embodiment of the application is as follows: when a person enters the room, the NPN transistor Q1 responds to the first detection signal, the NPN transistor Q1 is turned on, and the LED lamp L1 emits light to illuminate the room.
When a person leaves a room, the base of the PNP triode Q2 responds to a second detection signal, the PNP triode Q2 is conducted and a coil of the relay KM1 is electrified, the coil of the relay KM1 is electrified to disconnect a normally closed contact of the relay KM1, the base voltage of the NPN triode Q1 is pulled high by the first capacitor C1, the NPN triode Q1 is continuously conducted, the LED lamp L1 emits light for a period of time in a delayed mode, when the person returns to the room within the time delay of the LED lamp L1, the LED lamp L1 continues to emit light, when the person does not return to the room within the time delay of the LED lamp L1, the LED lamp L1 emits light in a delayed mode, and then extinguishes, and therefore waste of electric energy is reduced.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. A delay control circuit, characterized by: comprises that
The detection unit (1) outputs a first detection signal when a detection person is located in a room, and outputs a second detection signal when the detection person is not located in the room;
an execution unit (2) connected to the detection unit (1) and responsive to the first detection signal and illuminating the room;
and the delay turn-off unit (3) is connected with the execution unit (2), responds to the second detection signal and enables the execution unit (2) to continuously illuminate for a preset time period, and the execution unit (2) is turned off after illuminating for the preset time period.
2. The delay control circuit of claim 1, wherein: the detection unit (1) comprises a pyroelectric infrared sensor P1, a power supply input end of the pyroelectric infrared sensor P1 is connected with a power supply VCC, and a power supply output end of the pyroelectric infrared sensor P1 is grounded;
the pyroelectric infrared sensor P1 outputs a first detection signal with high level when detecting that a person is in a room; the pyroelectric infrared sensor P1 outputs a second detection signal of low level when detecting that a person is not present in the room.
3. The delay control circuit of claim 2, wherein: the execution unit (2) comprises an NPN type triode Q1 and an LED lamp L1; the base electrode of the NPN type triode Q1 is connected with the signal output end of the pyroelectric infrared sensor P1, the collector electrode of the NPN type triode Q1 is connected with a power supply VCC, the emitter electrode of the NPN type triode Q1 is grounded, and the LED lamp L1 is connected between the collector electrode of the NPN type triode Q1 and the power supply VCC in series;
the base of the NPN transistor Q1 responds to the first detection signal, the NPN transistor Q1 is turned on, and the LED lamp L1 lights up after the NPN transistor Q1 is turned on.
4. A delay control circuit according to claim 3, wherein: the time delay turn-off unit (3) comprises a PNP type triode Q2 and a relay KM 1; the base electrode of the PNP type triode Q2 is connected with the signal output end of the pyroelectric infrared sensor P1, the emitter electrode of the PNP type triode Q2 is connected with a power supply VCC, and the collector electrode of the PNP type triode Q2 is grounded;
the time-delay turn-off unit (3) further comprises a first capacitor C1 and a first resistor R1; one end of the first capacitor C1 is connected with a power supply VCC, and the other end is grounded; a coil of the relay KM1 is connected in series between an emitter of the PNP triode Q2 and a power supply VCC, and a normally closed contact of the relay KM1 is connected in series between the power supply VCC and a first capacitor C1; one end of the first resistor R1 is connected with a connection node between the base electrode of the NPN type triode Q1 and the signal output end of the pyroelectric sensor P1, and the other end of the first resistor R1 is grounded;
and a connecting node between the base electrode of the PNP type triode Q1 and the first resistor R1 is connected with a lead, and when the normally closed contact of the relay KM1 is disconnected, one end of the first capacitor C1 is connected with the base electrode of the PNP type triode Q1 through the lead.
5. A delay control circuit according to claim 3, wherein: a current limiting resistor R2 is connected in series between the emitter and the ground of the NPN transistor Q1.
6. The delay control circuit of claim 2, wherein: a second capacitor C2 is connected to the pyroelectric infrared sensor P1; one end of the second capacitor C2 is connected to the signal output end of the pyroelectric infrared sensor P1, and the other end is grounded.
7. The delay control circuit of claim 2, wherein: a pull-down resistor R3 is connected to the pyroelectric infrared sensor P1; one end of the pull-down resistor R3 is connected with the signal output end of the pyroelectric infrared sensor P1, and the other end is grounded.
8. The delay control circuit of claim 4, wherein: two ends of the coil of the relay KM1 are connected with a fly-wheel diode L2 in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120605137.5U CN214544881U (en) | 2021-03-25 | 2021-03-25 | Time delay control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120605137.5U CN214544881U (en) | 2021-03-25 | 2021-03-25 | Time delay control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214544881U true CN214544881U (en) | 2021-10-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120605137.5U Active CN214544881U (en) | 2021-03-25 | 2021-03-25 | Time delay control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214544881U (en) |
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2021
- 2021-03-25 CN CN202120605137.5U patent/CN214544881U/en active Active
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